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Document And Entity Information - shares	6 Months Ended
Document And Entity Information - shares	Jun. 30, 2013	Aug. 01, 2013
Common Class A [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		28,803,237
Common Class B [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		10,708,683
Entity Registrant Name	RUSH ENTERPRISES INC \TX\
Document Type	10-Q
Current Fiscal Year End Date	--12-31
Amendment Flag	false
Entity Central Index Key	0001012019
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Well-known Seasoned Issuer	No
Document Period End Date	Jun. 30, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q2

Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 203,534	$ 198,773
Accounts receivable, net	89,576	89,615
Inventories, net	752,195	690,953
Prepaid expenses and other	6,889	12,088
Deferred income taxes, net	15,249	14,630
Total current assets	1,067,443	1,006,059
Investments	6,628	6,628
Property and equipment, net	652,078	622,112
Goodwill, net	198,282	198,257
Other assets, net	47,809	48,510
Total assets	1,972,240	1,881,566
Current liabilities:
Floor plan notes payable	572,311	534,520
Current maturities of long-term debt	77,731	80,030
Current maturities of capital lease obligations	10,013	10,673
Trade accounts payable	81,822	62,270
Accrued expenses	81,491	100,953
Total current liabilities	823,368	788,446
Long-term debt, net of current maturities	341,999	319,634
Capital lease obligations, net of current maturities	37,638	39,300
Other long-term liabilities	5,414	2,484
Deferred income taxes, net	123,654	123,756
Shareholders’ equity:
Preferred stock, par value $.01 per share; 1,000,000 shares authorized; 0 shares outstanding in 2013 and 2012	0	0
Common stock, par value $.01 per share; 60,000,000 class A shares and 20,000,000 class B shares authorized; 28,766,938 class A shares and 10,753,909 class B shares outstanding in 2013; and 27,999,068 class A shares and 10,792,223 class B shares outstanding in 2012	413	404
Additional paid-in capital	237,608	222,627
Treasury stock, at cost: 1,745,128 class B shares	(20,220)	(17,948)
Retained earnings	423,798	404,619
Accumulated other comprehensive loss, net of tax	(1,432)	(1,756)
Total shareholders’ equity	640,167	607,946
Total liabilities and shareholders’ equity	$ 1,972,240	$ 1,881,566

Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares	Jun. 30, 2013	Dec. 31, 2012
Common Class A [Member]
Common stock, shares authorized	60,000,000	60,000,000
Common stock, shares outstanding	28,766,938	27,999,068
Common Class B [Member]
Common stock, shares authorized	20,000,000	20,000,000
Common stock, shares outstanding	10,753,909	10,792,223
Preferred stock, par value (in Dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares outstanding	0	0
Common stock, par value (in Dollars per share)	$ 0.01	$ 0.01
Treasury stock, shares	1,745,128

Consolidated Statements of Income and Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenues:
New and used truck sales	$ 508,194	$ 598,220	$ 997,804	$ 1,150,148
Parts and service	242,928	208,290	474,407	404,936
Lease and rental	31,358	23,433	61,498	46,909
Finance and insurance	3,838	3,577	6,971	6,714
Other	3,356	2,324	5,782	4,466
Total revenue	789,674	835,844	1,546,462	1,613,173
Cost of products sold:
New and used truck sales	473,153	559,017	925,727	1,069,824
Parts and service	152,449	127,617	298,162	245,873
Lease and rental	26,384	19,574	51,097	39,580
Total cost of products sold	651,986	706,208	1,274,986	1,355,277
Gross profit	137,688	129,636	271,476	257,896
Selling, general and administrative	118,628	91,683	220,734	184,698
Depreciation and amortization	7,259	6,055	14,369	11,939
(Loss) gain on sale of assets	(12)	68	29	87
Operating income	11,789	31,966	36,402	61,346
Interest expense, net	2,480	3,407	4,993	6,711
Income before taxes	9,309	28,559	31,409	54,635
Provision for income taxes	3,677	11,137	12,230	21,307
Net income	$ 5,632	$ 17,422	$ 19,179	$ 33,328
Earnings per common share:
Basic (in Dollars per share)	$ 0.14	$ 0.45	$ 0.49	$ 0.86
Diluted (in Dollars per share)	$ 0.14	$ 0.44	$ 0.47	$ 0.84
Weighted average shares outstanding:
Basic (in Shares)	39,552	38,675	39,337	38,531
Diluted (in Shares)	40,581	39,544	40,446	39,605
Comprehensive income	$ 5,785	$ 17,428	$ 19,502	$ 33,333

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:
Net income	$ 19,179	$ 33,328
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	44,228	34,267
Gain on sale of property and equipment	(29)	(87)
Stock-based compensation expense related to stock options and employee stock purchases	5,515	4,801
Provision for deferred income tax	(924)	5,785
Excess tax benefits from stock-based compensation	(2,138)	(1,428)
Change in accounts receivable, net	404	2,285
Change in inventories	(44,330)	(167,630)
Change in prepaid expenses and other, net	5,209	7,327
Change in trade accounts payable	19,552	13,314
Change in accrued expenses	(14,725)	(35,201)
Draws on floor plan notes payable – trade, net	4,789	36,067
Net cash provided by (used in) operating activities	36,730	(67,172)
Cash flows from investing activities:
Acquisition of property and equipment	(82,532)	(78,516)
Proceeds from the sale of property and equipment	332	1,042
Business acquisitions	(3,528)	(36)
Change in other assets	(66)	(644)
Net cash used in investing activities	(85,794)	(78,154)
Cash flows from financing activities:
Draws on floor plan notes payable – non-trade, net	33,002	77,889
Proceeds from long-term debt	65,651	63,914
Principal payments on long-term debt	(45,585)	(34,962)
Principal payments on capital lease obligations	(6,446)	(5,610)
Excess tax benefits from stock-based compensation	2,138	1,428
Proceeds from issuance of shares relating to employee stock options and employee stock purchases	7,337	3,897
Common stock repurchased	(2,272)
Net cash provided by financing activities	53,825	106,556
Net increase (decrease) in cash and cash equivalents	4,761	(38,770)
Cash and cash equivalents, beginning of period	198,773	207,775
Cash and cash equivalents, end of period	203,534	169,005
Cash paid during the period for:
Interest	11,334	11,409
Income taxes, net of refunds	1,360	2,598
Noncash investing activities:
Assets acquired under capital leases	$ 4,124	$ 4,624

Note 1 - Principles of Consolidation and Basis of Presentation

6 Months Ended

Jun. 30, 2013

Disclosure Text Block [Abstract]

Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]

1 – Principles of Consolidation and Basis of Presentation

The interim consolidated financial statements included herein have been prepared by Rush Enterprises, Inc. and its subsidiaries (collectively referred to as the “Company”), without audit, pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”). All adjustments have been made to the accompanying interim consolidated financial statements, which, in the opinion of the Company’s management, are necessary for a fair presentation of the Company’s operating results. All adjustments are of a normal recurring nature. Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles have been condensed or omitted pursuant to such rules and regulations. It is recommended that these interim consolidated financial statements be read in conjunction with the consolidated financial statements and the notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2012. Results of operations for interim periods are not necessarily indicative of results that may be expected for any other interim periods or the full fiscal year.

- Definition

The entire disclosure for organization, consolidation and basis of presentation of financial statements disclosure.

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+ Details

Note 2 - Other Assets

6 Months Ended

Jun. 30, 2013

Disclosure Text Block Supplement [Abstract]

Other Assets Disclosure [Text Block]

2 – Other Assets

The total capitalized costs of the SAP enterprise software and SAP dealership management system of $40.3 million, including capitalized interest, are recorded on the Consolidated Balance Sheet in Other Assets, net of accumulated amortization of $5.5 million. The SAP software will be amortized over a period of 15 years. The Company is currently operating 35 Rush Truck Centers and all of its leasing operations on the SAP enterprise software and SAP dealership management system, which represent approximately 47% of total revenue for the six months ended June 30, 2013. The Company plans to convert all of its current Rush Truck Centers to the SAP enterprise software and SAP dealership management system by the end of 2014.

Amortization expense relating to the SAP software, was $0.7 million for the three months ended June 30, 2013 and $0.7 million for the three months ended June 30, 2012, and $1.5 million for the six months ended June 30, 2013, and $1.4 million for the six months ended June 30, 2012, and is recognized in depreciation and amortization expense in the Consolidated Statement of Income.

The Company’s only significant identifiable intangible assets, other than goodwill, are rights under franchise agreements with manufacturers. The fair market value of the Company’s manufacturer franchise rights of $4.5 million, which are included in Other Assets on the accompanying consolidated balance sheets, is determined at the acquisition date through discounting the projected cash flows specific to each franchise. The Company has determined that manufacturer franchise rights have an indefinite life as there are no economic or other factors that limit their useful lives, and they are expected to generate cash flows indefinitely due to the historically long lives of the manufacturers’ brand names. Furthermore, to the extent that any agreements evidencing manufacturer franchise rights would expire, the Company expects that it would be able to renew those agreements in the ordinary course of business. Accordingly, the Company does not amortize manufacturer franchise rights.

Due to the fact that manufacturer franchise rights are specific to a geographic region, the company has determined that the geographic region is the appropriate level for purposes of testing franchise rights for impairment. Management reviews indefinite lived manufacturer franchise rights for impairment annually during the fourth quarter, or more often if events or circumstances indicate that impairment may have occurred. The Company is subject to financial statement risk to the extent that manufacturer franchise rights become impaired due to decreases in fair market value of its individual franchises.

The significant estimates and assumptions used by management in assessing the recoverability of manufacturer franchise rights are estimated future cash flows, present value discount rate, and other factors. Any changes in these estimates or assumptions could result in an impairment charge. The estimates of future cash flows, based on reasonable and supportable assumptions and projections, require management’s subjective judgment. Depending on the assumptions and estimates used, the estimated future cash flows projected in the evaluations of manufacturer franchise rights can vary within a range of outcomes.

No impairment write down was required for manufacturer franchise rights in the fourth quarter of 2012. Management is not aware of any impairment charge that may currently be required; however, the Company cannot predict the occurrence of certain events that might adversely affect the reported value of manufacturer franchise rights in the future.

Note 3 - Commitments and Contingencies

6 Months Ended

Jun. 30, 2013

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies Disclosure [Text Block]

3 – Commitments and Contingencies

From time to time, the Company is involved in litigation arising out of its operations in the ordinary course of business. The Company maintains liability insurance, including product liability coverage, in amounts deemed adequate by management. To date, aggregate costs to us for claims, including product liability actions, have not been material. However, an uninsured or partially insured claim, or claim for which indemnification is not available, could have a material adverse effect on the Company’s financial condition or results of operations. The Company believes that there are no claims or litigation pending, the outcome of which could have a material adverse effect on its financial position or results of operations. However, due to the inherent uncertainty of litigation, there can be no assurance that the resolution of any particular claim or proceeding would not have a material adverse effect on the Company’s financial condition or results of operations for the fiscal period in which such resolution occurred.

In May 2013, the Company entered into a Retirement and Transition Agreement with the Company's former Chairman, W. Marvin Rush, which resulted in the recognition of $10.8 million in retirement pay and benefits recorded in selling, general and administrative expense on the Consolidated Statements of Income and Comprehensive Income for the three months and six months ended June 30, 2013. The current portion of the accrual for the unpaid retirement pay and benefits of $0.9 million is a component of accrued liabilities and the long-term portion of the accrual for the unpaid retirement pay and benefits of $2.7 million is a component of other long-term liabilities in the Consolidated Balance Sheet as of June 30, 2013.

Note 4 - Earnings Per Share

6 Months Ended

Jun. 30, 2013

Earnings Per Share [Abstract]

Earnings Per Share [Text Block]

4 – Earnings Per Share

The following table sets forth the computation of basic and diluted earnings per share (in thousands, except per share information):

	Three Months Ended June 30,				Six Months Ended June 30,
	2013		2012		2013		2012
Numerator:
Numerator for basic and diluted earnings per share – Net income available to common shareholders	$	5,632	$	17,422	$	19,179	$	33,328

Denominator– Denominator for basic earnings per share – weighted average shares outstanding		39,552		38,675		39,337		38,531
Effect of dilutive securities– Employee and director stock options and restricted share awards		1,029		869		1,109		1,074
Denominator for diluted earnings per share – adjusted weighted average shares outstanding and assumed conversions		40,581		39,544		40,446		39,605

Basic earnings per common share	$	.14	$	.45	$	.49	$	.86

Diluted earnings per common share and common share equivalents	$	.14	$	.44	$	.47	$	.84

Options to purchase shares of common stock that were outstanding for the three months and six months ended June 30, 2013 and 2012 that were not included in the computation of diluted earnings per share because the effect would have been anti-dilutive are as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2013		2012		2013		2012
Options		924,158		1,373,860		924,158		1,126,795
Total anti-dilutive securities		924,158		1,373,860		924,158		1,126,795

Note 5 - Stock Options and Restricted Stock Awards

6 Months Ended

Jun. 30, 2013

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Disclosure of Compensation Related Costs, Share-based Payments [Text Block]

5 – Stock Options and Restricted Stock Awards

Valuation and Expense Information

The Company accounts for stock-based compensation in accordance with Accounting Standards Codification (“ASC”) 718-10, “Compensation – Stock Compensation,” which requires the measurement and recognition of compensation expense for all share-based payment awards made to the Company’s employees and directors including employee stock options, restricted share awards and employee stock purchases related to the Employee Stock Purchase Plan based on estimated fair values. Stock-based compensation expense, calculated using the Black-Scholes option-pricing model and included in selling, general and administrative expense, was $2.3 million for the three months ended June 30, 2013, and $1.7 million for the three months ended June 30, 2012. Stock-based compensation expense, included in selling, general and administrative expense, for the six months ended June 30, 2013, was $5.5 million and for the six months ended June 30, 2012, was $4.8 million. As of June 30, 2013, there was $15.7 million of total unrecognized compensation cost related to non-vested share-based compensation arrangements to be recognized over a weighted-average period of 2.4 years.

Note 6 - Financial Instruments and Fair Value

6 Months Ended

Jun. 30, 2013

Fair Value Disclosures [Abstract]

Fair Value Disclosures [Text Block]

6 – Financial Instruments and Fair Value

The Company measures certain financial assets and liabilities at fair value on a recurring basis. Financial instruments consist primarily of cash, accounts receivable, accounts payable and floor plan notes payable. The carrying values of the Company’s financial instruments approximate fair value due either to their short-term nature or existence of variable interest rates, which approximate market rates. The carrying value of current assets and current liabilities approximates the fair value due to the short maturity of these items.

The fair value of the Company’s long-term debt is based on secondary market indicators. Since the Company’s debt is not quoted, estimates are based on each obligation’s characteristics, including remaining maturities, interest rate, credit rating, collateral and liquidity. Accordingly, the Company concluded the valuation measurement inputs of its long-term debt to represent, at its lowest level, current market interest rates available to the Company for similar debt and the Company’s current credit standing and has categorized such debt within Level 2 of the hierarchy framework. The carrying amount approximates fair value.

If investments are deemed to be impaired, the Company determines whether the impairment is temporary or other than temporary. If the impairment is deemed to be temporary, the Company records an unrealized loss in other comprehensive income. If the impairment is deemed other than temporary, the Company records the impairment in the Company’s consolidated statement of income.

In prior years, the Company invested in interest-bearing short-term investments primarily consisting of investment-grade auction rate securities classified as available-for-sale and reported at fair value. These types of investments were designed to provide liquidity through an auction process that reset the applicable interest rates at predetermined periods ranging from 1 to 35 days. This reset mechanism was intended to allow existing investors to continue to own their respective interest in the auction rate security or to gain immediate liquidity by selling their interests at par.

Auctions for investment grade securities held by the Company have failed. However, a failed auction does not represent a default by the issuer. The auction rate securities continue to pay interest in accordance with the terms of the underlying security; however, liquidity will be limited until there is a successful auction or until such time as other markets for these investments develop. The Company has the intent and ability to hold these auction rate securities until liquidity returns to the market. The Company does not believe that the lack of liquidity relating to its auction rate securities will have a material impact on its ability to fund operations.

As of June 30, 2013, the Company held auction rate securities with underlying tax-exempt municipal bonds that mature in 2030 that have a fair value of $6.6 million and a cost basis of $7.6 million. These bonds have credit wrap insurance and a credit rating of A2 by a major credit rating agency.

The Company valued the auction rate securities at June 30, 2013 using a discounted cash flow model based on the characteristics of the individual securities, which the Company believes yields the best estimate of fair value. The first step in the valuation included a credit analysis of the security which considered various factors including the credit quality of the issuer, the instrument’s position within the capital structure of the issuing authority, and the composition of the authority’s assets including the effect of insurance and/or government guarantees. Next, the future cash flows of the instruments were projected based on certain assumptions regarding the auction rate market significant to the valuation including the auction rate market will remain illiquid and auctions will continue to fail causing the interest rate to be the maximum applicable rate. This assumption resulted in discounted cash flow analysis being performed through 2019, the point at which the Company estimates the securities will be redeemed by the municipality. The projected cash flows were then discounted using the applicable yield curve plus a 225 basis point liquidity premium added to the applicable discount rate.

The Company recorded a pre-tax impairment charge of $1.0 million on these investments in 2011. The Company believes that the impairment is temporary and has included the impairment in accumulated other comprehensive loss.

The table below presents disclosures about the auction rate securities measured at fair value on a recurring basis in the Company’s financial statements as follows (in thousands):

	At June 30, 2013
			Fair Value Estimated Using
	Cost Basis Amount		Level 1 Inputs		Level 2 Inputs		Level 3 Inputs
Investment in auction rate securities	$	7,575	$	−	$	−	$	6,628

	At December 31, 2012
			Fair Value Estimated Using
	Cost Basis Amount		Level 1 Inputs		Level 2 Inputs		Level 3 Inputs
Investment in auction rate securities	$	7,575	$	−	$	−	$	6,628

Interest Rate Swap Agreements

The Company has entered into swap agreements to hedge against the potential impact of increases in interest rates on its floating-rate debt instruments. Swap agreements that hedge exposures to changes in interest rates expose us to credit risk and market risk. Credit risk is the potential failure of the counterparty to perform under the terms of the swap agreement. The Company attempts to minimize this risk by entering into transactions with high-quality counterparties. Market risk is the potential adverse effect on the value of the swap agreement that results from a decline in interest rates. The market risk associated with interest-rate contracts is managed by establishing and monitoring parameters that limit the types and degree of market risk that may be undertaken.

At June 30, 2013, the Company had an aggregate $40.0 million notional amount of interest rate swap contracts, which have been designated as cash flow hedges, to pay fixed rates of interest and receive a floating interest rate based on LIBOR. The fixed interest rates specified in the interest rate swap contracts became effective on or about January 1, 2012. The Company’s interest rate swaps qualify for cash flow hedge accounting treatment. Unrealized gains or losses are recorded in accumulated other comprehensive income. Realized gains and losses will be recognized in interest expense, if they occur. Amounts to be received or paid under the contracts will be recognized as interest expense over the life of the contracts. There was no ineffectiveness for these swaps during the quarters ended June 30, 2013 and June 30, 2012.

The fair value of cash flow swaps is calculated as the present value of expected future cash flows, determined on the basis of forward interest rates and present value factors. As such, the carrying amounts for these swaps are designated to be Level 2 fair values and totaled $1.4 million, excluding accrued interest, as of June 30, 2013. The carrying value of these swaps is included in Other Long-Term Liabilities on the accompanying Consolidated Balance Sheet as of June 30, 2013.

As of June 30, 2013 the Company was party to derivative financial instruments, as described in the following table (in thousands):

Agreement	Notional Amount		Fixed Interest Rate			Underlying Rate	Expiration Date	Fair Value
Interest Rate Swap	$	1,952		5.075	%	3 month LIBOR	July 1, 2015	$	(67	)
Interest Rate Swap		4,032		5.075	%	3 month LIBOR	July 1, 2015		(138	)
Interest Rate Swap		6,992		5.39	%	1 month LIBOR	December 31, 2014		(200	)
Interest Rate Swap		1,351		5.39	%	1 month LIBOR	December 31, 2014		(39	)
Interest Rate Swap		2,406		5.39	%	1 month LIBOR	December 31, 2014		(69	)
Interest Rate Swap		5,443		5.39	%	1 month LIBOR	December 31, 2014		(156	)
Interest Rate Swap		4,992		5.38	%	1 month LIBOR	June 29, 2015		(208	)
Interest Rate Swap		768		5.29	%	1 month LIBOR	June 30, 2015		(31	)
Interest Rate Swap		1,472		5.29	%	1 month LIBOR	June 30, 2015		(59	)
Interest Rate Swap		7,424		5.29	%	1 month LIBOR	June 30, 2015		(295	)
Interest Rate Swap		640		5.29	%	1 month LIBOR	June 30, 2015		(25	)
Interest Rate Swap		2,573		5.29	%	1 month LIBOR	June 30, 2015		(102	)

Fair values of derivative instruments are on the accompanying Consolidated Balance Sheet (in thousands):

		Fair Value at
Derivative Liabilities Designated as Hedging Instruments	Balance Sheet Location	June 30, 2013		December 31, 2012
Interest Rate Swaps	Other Long-Term Liabilities	$	1,389	$	1,915

(in thousands)	Gain (Loss) Recognized in OCI on Derivatives (Effective Portion) during the Three Months Ended					Location of Loss	Loss Reclassified from Accumulated OCI into Income (Effective Portion) during the Three Months Ended
	June 30, 2013		June 30, 2012			Reclassified into Income	June 30, 2013			June 30, 2012
Interest rate swaps	$	249	$	(16	)	Interest Expense	$	(85	)	$	(103	)

(in thousands)	Gain (Loss) Recognized in OCI on Derivatives (Effective Portion) during the Six Months Ended					Location of Loss	Loss Reclassified from Accumulated OCI into Income (Effective Portion) during the Six Months Ended
	June 30, 2013		June 30, 2012			Reclassified into Income	June 30, 2013			June 30, 2012
Interest rate swaps	$	526	$	(7	)	Interest Expense	$	(170	)	$	(208	)

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Note 7 - Segment Information

6 Months Ended

Jun. 30, 2013

Segment Reporting [Abstract]

Segment Reporting Disclosure [Text Block]

7 – Segment Information

The Company currently has one reportable business segment, the Truck Segment. The Truck Segment operates a network of commercial vehicle dealerships that provide an integrated one-stop source for the commercial vehicle needs of its customers, including retail sales of new and used commercial vehicles; aftermarket parts, service and body shop facilities; and a wide array of financial services, including the financing of new and used commercial vehicle purchases, insurance products and truck leasing and rentals. The commercial vehicle dealerships are deemed a single reporting unit because they have similar economic characteristics. The Company’s chief operating decision maker considers the entire Truck Segment, not individual dealerships, when making decisions about resources to be allocated to the segment and assess its performance.

The accounting policies of the segments are the same as those described in the summary of significant accounting policies. The Company evaluates performance based on income before income taxes not including extraordinary items.

The following table contains summarized information about reportable segment revenue, segment income or loss from continuing operations and segment assets for the periods ended June 30, 2013 and 2012 (in thousands):

	Truck Segment		All Other			Total

As of and for the three months ended June 30, 2013

Revenues from external customers	$	784,573	$	5,101		$	789,674
Segment income (loss) before taxes		8,943		366			9,309
Segment assets		1,945,552		26,688			1,972,240

As of and for the six months ended June 30, 2013

Revenues from external customers	$	1,536,803	$	9,659		$	1,546,462
Segment income (loss) before taxes		31,091		318			31,409

As of and for the three months ended June 30, 2012

Revenues from external customers	$	830,773	$	5,071		$	835,844
Segment income (loss) before taxes		28,574		(15	)		28,559
Segment assets		1,858,045		27,396			1,885,441

As of and for the six months ended June 30, 2012

Revenues from external customers	$	1,603,681	$	9,492		$	1,613,173
Segment income (loss) before taxes		54,817		(182	)		54,635

Revenues from segments below the quantitative thresholds are attributable to three operating segments of the Company and are included in the All Other column. Those segments include a retail tire company, an insurance agency and a guest ranch operation. None of those segments has ever met any of the quantitative thresholds for determining reportable segments.

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

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+ Details

Note 8 - Income Taxes

6 Months Ended

Jun. 30, 2013

Income Tax Disclosure [Abstract]

Income Tax Disclosure [Text Block]

8 – Income Taxes

The Company included accruals for unrecognized income tax benefits totaling $1.4 million as a component of accrued liabilities as of June 30, 2013, and $1.3 million as of June 30, 2012. Unrecognized tax benefits of $1.0 million at June 30, 2013, and $1.3 million as of June 30, 2012, if recognized, would impact the Company’s effective tax rate. An unfavorable settlement could require a charge to income tax expense and a favorable resolution would be recognized as a reduction to income tax expense. The Company records interest and penalties related to unrecognized income tax benefits in income tax expense. The Company had accrued interest of $49,000 at June 30, 2013 and $51,000 at June 30, 2012 related to unrecognized tax benefits. No amounts were accrued for penalties.

The Company does not anticipate a significant change in the amount of unrecognized tax benefits in the next 12 months. As of June 30, 2013, the tax years ended December 31, 2009 through 2012 remained subject to audit by federal tax authorities and the tax years ended December 31, 2008 through 2012, remained subject to audit by state tax authorities.

Note 9 - Accumulated Other Comprehensive Income

6 Months Ended

Jun. 30, 2013

Disclosure Text Block [Abstract]

Comprehensive Income (Loss) Note [Text Block]

9 – Accumulated Other Comprehensive Income

In February 2013, the FASB issued guidance requiring entities to provide information about the amounts reclassified out of accumulated other comprehensive income (“AOCI”) by component. In addition, it requires entities to present, either on the face of the financial statement where net income is presented or in the notes, significant amounts reclassified out of AOCI by the respective line items of net income if the amount reclassified is required under GAAP to be reclassified to net income in its entirety in the same reporting period. This guidance is effective prospectively for annual and interim reporting periods beginning after December 15, 2012, with early adoption permitted. The amounts required to be disclosed under this guidance are below.

The following table shows the components of accumulated other comprehensive loss, net of tax, (in thousands):

	Cash Flow Swaps			Available for Sale Securities			Total
Balance as of December 31, 2012	$	(1,178	)	$	(578	)	$	(1,756	)
Changes in fair value		118			−			118
Amounts reclassified from accumulated other comprehensive loss		53			−			53
Net current period other comprehensive income		171			−			171
Balance as of March 31, 2013	$	(1,007	)	$	(578	)	$	(1,585	)
Changes in fair value		101			−			101
Amounts reclassified from accumulated other comprehensive loss		52			−			52
Net current period other comprehensive income		153			−			153
Balance as of June 30, 2013	$	(854	)	$	(578	)	$	(1,432	)

The following table shows the amount of loss reclassified from accumulated other comprehensive loss into earnings (in thousands):

	Three Months Ended						Six Months Ended
	June 30, 2013			June 30, 2012			June 30, 2013			June 30, 2012
Losses on cash flow swaps to:
Interest expense	$	85		$	103		$	170		$	208
		85			103			170			208
Income tax benefit		(33	)		(40	)		(65	)		(81	)
Total reclassifications	$	52		$	63		$	105		$	127

- Definition

The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income.

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+ Details

Note 10 - Acquisitions

6 Months Ended

Jun. 30, 2013

Business Combinations [Abstract]

Business Combination Disclosure [Text Block]

10 – Acquisitions

On May 6, 2013, the Company acquired certain assets of Piedmont International Trucks, LLC, which operated commercial truck dealerships in Statesville, Hickory and Asheville, North Carolina. The acquisition included International and Idealease franchises.

These locations are operating as Rush Truck Centers and offer commercial vehicles manufactured by International in addition to parts, service, body shop, leasing, financing and insurance capabilities.The transaction was valued at approximately $3.5 million, with the purchase price paid in cash. The operations of Piedmont International Trucks, LLC are included in the accompanying consolidated financial statements from the date of the acquisition. The preliminary purchase price was allocated based on the fair values of the assets at the date of acquisition as follows (in thousands):

Inventory	$	1,720
Property and equipment		1,485
Prepaid expenses		10
Accounts receivable		364
Accrued expenses		(76	)
Total	$	3,503

As the value of certain assets and liabilities are preliminary in nature, they are subject to adjustment as additional information is obtained about the facts and circumstances that existed at the acquisition date. Pro forma information is not included in accordance with ASC 805 since the acquisition was not considered material.

- Definition

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

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+ Details

Note 11 - Subsequent Event

6 Months Ended

Jun. 30, 2013

Subsequent Events [Abstract]

Subsequent Events [Text Block]

11 – Subsequent Event

On July 11, 2013, the Company entered into the third amendment to its $600.0 million amended and restated credit agreement with GE Capital. The amendment increases the aggregate loan commitment to $750.0 million. Borrowings under the amended credit agreement will now bear interest per annum, payable monthly, at the three month LIBOR rate, determined on the last day of the prior month, plus 2.03%. In addition, the Company is required to pay to the lenders a monthly working capital fee equal to 0.35% per annum multiplied by the amount of voluntary prepayments of new and used inventory loans. Pursuant to the third amendment, the credit agreement expires July 11, 2016, although GE Capital has the right to terminate the credit agreement at any time upon 120 days written notice.

Note 4 - Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2013

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	Three Months Ended June 30,				Six Months Ended June 30,
	2013		2012		2013		2012
Numerator:
Numerator for basic and diluted earnings per share – Net income available to common shareholders	$	5,632	$	17,422	$	19,179	$	33,328

Denominator– Denominator for basic earnings per share – weighted average shares outstanding		39,552		38,675		39,337		38,531
Effect of dilutive securities– Employee and director stock options and restricted share awards		1,029		869		1,109		1,074
Denominator for diluted earnings per share – adjusted weighted average shares outstanding and assumed conversions		40,581		39,544		40,446		39,605

Basic earnings per common share	$	.14	$	.45	$	.49	$	.86

Diluted earnings per common share and common share equivalents	$	.14	$	.44	$	.47	$	.84

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

	Three Months Ended June 30,				Six Months Ended June 30,
	2013		2012		2013		2012
Options		924,158		1,373,860		924,158		1,126,795
Total anti-dilutive securities		924,158		1,373,860		924,158		1,126,795

Note 6 - Financial Instruments and Fair Value (Tables)

6 Months Ended

Jun. 30, 2013

Fair Value Disclosures [Abstract]

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

	At June 30, 2013
			Fair Value Estimated Using
	Cost Basis Amount		Level 1 Inputs		Level 2 Inputs		Level 3 Inputs
Investment in auction rate securities	$	7,575	$	−	$	−	$	6,628

	At December 31, 2012
			Fair Value Estimated Using
	Cost Basis Amount		Level 1 Inputs		Level 2 Inputs		Level 3 Inputs
Investment in auction rate securities	$	7,575	$	−	$	−	$	6,628

Schedule of Derivative Instruments [Table Text Block]

Agreement	Notional Amount		Fixed Interest Rate			Underlying Rate	Expiration Date	Fair Value
Interest Rate Swap	$	1,952		5.075	%	3 month LIBOR	July 1, 2015	$	(67	)
Interest Rate Swap		4,032		5.075	%	3 month LIBOR	July 1, 2015		(138	)
Interest Rate Swap		6,992		5.39	%	1 month LIBOR	December 31, 2014		(200	)
Interest Rate Swap		1,351		5.39	%	1 month LIBOR	December 31, 2014		(39	)
Interest Rate Swap		2,406		5.39	%	1 month LIBOR	December 31, 2014		(69	)
Interest Rate Swap		5,443		5.39	%	1 month LIBOR	December 31, 2014		(156	)
Interest Rate Swap		4,992		5.38	%	1 month LIBOR	June 29, 2015		(208	)
Interest Rate Swap		768		5.29	%	1 month LIBOR	June 30, 2015		(31	)
Interest Rate Swap		1,472		5.29	%	1 month LIBOR	June 30, 2015		(59	)
Interest Rate Swap		7,424		5.29	%	1 month LIBOR	June 30, 2015		(295	)
Interest Rate Swap		640		5.29	%	1 month LIBOR	June 30, 2015		(25	)
Interest Rate Swap		2,573		5.29	%	1 month LIBOR	June 30, 2015		(102	)

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]

		Fair Value at
Derivative Liabilities Designated as Hedging Instruments	Balance Sheet Location	June 30, 2013		December 31, 2012
Interest Rate Swaps	Other Long-Term Liabilities	$	1,389	$	1,915

Derivative Instruments, Gain (Loss) [Table Text Block]

(in thousands)	Gain (Loss) Recognized in OCI on Derivatives (Effective Portion) during the Three Months Ended					Location of Loss	Loss Reclassified from Accumulated OCI into Income (Effective Portion) during the Three Months Ended
	June 30, 2013		June 30, 2012			Reclassified into Income	June 30, 2013			June 30, 2012
Interest rate swaps	$	249	$	(16	)	Interest Expense	$	(85	)	$	(103	)

(in thousands)	Gain (Loss) Recognized in OCI on Derivatives (Effective Portion) during the Six Months Ended					Location of Loss	Loss Reclassified from Accumulated OCI into Income (Effective Portion) during the Six Months Ended
	June 30, 2013		June 30, 2012			Reclassified into Income	June 30, 2013			June 30, 2012
Interest rate swaps	$	526	$	(7	)	Interest Expense	$	(170	)	$	(208	)

- Definition

Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item.

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-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=7476318&loc=d3e41638-113959

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5580258-113959

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579245-113959

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 25
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579240-113959

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=7476318&loc=d3e41620-113959

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(n)(2))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

Note 7 - Segment Information (Tables)

6 Months Ended

Jun. 30, 2013

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

	Truck Segment		All Other			Total

As of and for the three months ended June 30, 2013

Revenues from external customers	$	784,573	$	5,101		$	789,674
Segment income (loss) before taxes		8,943		366			9,309
Segment assets		1,945,552		26,688			1,972,240

As of and for the six months ended June 30, 2013

Revenues from external customers	$	1,536,803	$	9,659		$	1,546,462
Segment income (loss) before taxes		31,091		318			31,409

As of and for the three months ended June 30, 2012

Revenues from external customers	$	830,773	$	5,071		$	835,844
Segment income (loss) before taxes		28,574		(15	)		28,559
Segment assets		1,858,045		27,396			1,885,441

As of and for the six months ended June 30, 2012

Revenues from external customers	$	1,603,681	$	9,492		$	1,613,173
Segment income (loss) before taxes		54,817		(182	)		54,635

Note 9 - Accumulated Other Comprehensive Income (Tables)

6 Months Ended

Jun. 30, 2013

Reclassifications [Member]

Note 9 - Accumulated Other Comprehensive Income (Tables) [Line Items]

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

	Three Months Ended						Six Months Ended
	June 30, 2013			June 30, 2012			June 30, 2013			June 30, 2012
Losses on cash flow swaps to:
Interest expense	$	85		$	103		$	170		$	208
		85			103			170			208
Income tax benefit		(33	)		(40	)		(65	)		(81	)
Total reclassifications	$	52		$	63		$	105		$	127

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

	Cash Flow Swaps			Available for Sale Securities			Total
Balance as of December 31, 2012	$	(1,178	)	$	(578	)	$	(1,756	)
Changes in fair value		118			−			118
Amounts reclassified from accumulated other comprehensive loss		53			−			53
Net current period other comprehensive income		171			−			171
Balance as of March 31, 2013	$	(1,007	)	$	(578	)	$	(1,585	)
Changes in fair value		101			−			101
Amounts reclassified from accumulated other comprehensive loss		52			−			52
Net current period other comprehensive income		153			−			153
Balance as of June 30, 2013	$	(854	)	$	(578	)	$	(1,432	)

Note 10 - Acquisitions (Tables)

6 Months Ended

Jun. 30, 2013

Business Combinations [Abstract]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]

Inventory	$	1,720
Property and equipment		1,485
Prepaid expenses		10
Accounts receivable		364
Accrued expenses		(76	)
Total	$	3,503

Note 2 - Other Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Note 2 - Other Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Franchise Rights [Member]
Note 2 - Other Assets (Details) [Line Items]
Other Assets, Noncurrent	$ 4,500		$ 4,500
Sales Revenue, Services, Net [Member]
Note 2 - Other Assets (Details) [Line Items]
Concentration Risk, Percentage			47.00%
Computer Software, Intangible Asset [Member]
Note 2 - Other Assets (Details) [Line Items]
Other Assets, Noncurrent	40,300		$ 40,300
Finite-Lived Intangible Assets, Accumulated Amortization	5,500		$ 5,500
Finite-Lived Intangible Asset, Useful Life			15 years
Depreciation, Depletion and Amortization	700	$ 700	$ 1,500	$ 1,400
Other Assets, Noncurrent	$ 47,809		47,809		$ 48,510
Depreciation, Depletion and Amortization			$ 44,228	$ 34,267

Note 3 - Commitments and Contingencies (Details) - Former Chairman [Member] $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2013 USD ($)	Jun. 30, 2013 USD ($)
Note 3 - Commitments and Contingencies (Details) [Line Items]
Retirement Pay and Benefits	$ 10.8	$ 10.8
Other Postretirement Benefits Payable	0.9	0.9
Other Postretirement Benefits Payable, Noncurrent	$ 2.7	$ 2.7

Note 4 - Earnings Per Share (Details) - Basic and Diluted Earnings Per Share - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Numerator:
Numerator for basic and diluted earnings per share – Net income available to common shareholders (in Dollars)	$ 5,632	$ 17,422	$ 19,179	$ 33,328
Denominator– Denominator for basic earnings per share – weighted average shares outstanding	39,552	38,675	39,337	38,531
Effect of dilutive securities– Employee and director stock options and restricted share awards	1,029	869	1,109	1,074
Denominator for diluted earnings per share – adjusted weighted average shares outstanding and assumed conversions	40,581	39,544	40,446	39,605
Basic earnings per common share (in Dollars per share)	$ 0.14	$ 0.45	$ 0.49	$ 0.86
Diluted earnings per common share and common share equivalents (in Dollars per share)	$ 0.14	$ 0.44	$ 0.47	$ 0.84

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References + Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Net Income
-URI http://asc.fasb.org/extlink&oid=6518256

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04.19)
-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.18)
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04.22)
-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Other Comprehensive Income
-URI http://asc.fasb.org/extlink&oid=6519514

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=28358780&loc=d3e565-108580

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 19
-Article 5

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph 20
-Article 9

+ Details

Note 4 - Earnings Per Share (Details) - Options to Purchase Common Stock - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Equity Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive Securities	924,158	1,373,860	924,158	1,126,795
Anti-dilutive Securities	924,158	1,373,860	924,158	1,126,795

Note 5 - Stock Options and Restricted Stock Awards (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-based Compensation	$ 2,300	$ 1,700	$ 5,515	$ 4,801
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 15,700		$ 15,700
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition			2 years 146 days

Note 6 - Financial Instruments and Fair Value (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2011	Jun. 30, 2013	Dec. 31, 2012
Fair Value Disclosures [Abstract]
Available-for-sale Securities, Debt Securities, Noncurrent		$ 6,628	$ 6,628
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis		$ 7,600
Derivative, Basis Spread on Variable Rate (in Basis Points)		2.25%
Asset Impairment Charges	$ 1,000
Derivative Asset, Notional Amount		$ 40,000
Interest Rate Cash Flow Hedge Liability at Fair Value		$ 1,400

Note 6 - Financial Instruments and Fair Value (Details) - Investment in Auction Rate Securities - Auction Rate Securities [Member] - USD ($) $ in Thousands	Jun. 30, 2013	Dec. 31, 2012
Fair Value, Inputs, Level 3 [Member]
Note 6 - Financial Instruments and Fair Value (Details) - Investment in Auction Rate Securities [Line Items]
Investment in auction rate securities, fair value	$ 6,628	$ 6,628
Investment in auction rate securities, cost basis	$ 7,575	$ 7,575

Note 6 - Financial Instruments and Fair Value (Details) - Derivative Financial Instruments $ in Thousands	6 Months Ended
	Jun. 30, 2013 USD ($)
Interest Rate Swap Agreement 1 [Member]
Derivative [Line Items]
Notional Amount	$ 1,952
Fixed Interest Rate	5.075%
Underlying Rate	3 month LIBOR
Expiration Date	Jul. 01, 2015
Fair Value	$ (67)
Interest Rate Swap Agreement 2 [Member]
Derivative [Line Items]
Notional Amount	$ 4,032
Fixed Interest Rate	5.075%
Underlying Rate	3 month LIBOR
Expiration Date	Jul. 01, 2015
Fair Value	$ (138)
Interest Rate Swap Agreement 3 [Member]
Derivative [Line Items]
Notional Amount	$ 6,992
Fixed Interest Rate	5.39%
Underlying Rate	1 month LIBOR
Expiration Date	Dec. 31, 2014
Fair Value	$ (200)
Interest Rate Swap Agreement 4 [Member]
Derivative [Line Items]
Notional Amount	$ 1,351
Fixed Interest Rate	5.39%
Underlying Rate	1 month LIBOR
Expiration Date	Dec. 31, 2014
Fair Value	$ (39)
Interest Rate Swap Agreement 5 [Member]
Derivative [Line Items]
Notional Amount	$ 2,406
Fixed Interest Rate	5.39%
Underlying Rate	1 month LIBOR
Expiration Date	Dec. 31, 2014
Fair Value	$ (69)
Interest Rate Swap Agreement 6 [Member]
Derivative [Line Items]
Notional Amount	$ 5,443
Fixed Interest Rate	5.39%
Underlying Rate	1 month LIBOR
Expiration Date	Dec. 31, 2014
Fair Value	$ (156)
Interest Rate Swap Agreement 7 [Member]
Derivative [Line Items]
Notional Amount	$ 4,992
Fixed Interest Rate	5.38%
Underlying Rate	1 month LIBOR
Expiration Date	Jun. 29, 2015
Fair Value	$ (208)
Interest Rate Swap Agreement 8 [Member]
Derivative [Line Items]
Notional Amount	$ 768
Fixed Interest Rate	5.29%
Underlying Rate	1 month LIBOR
Expiration Date	Jun. 30, 2015
Fair Value	$ (31)
Interest Rate Swap Agreement 9 [Member]
Derivative [Line Items]
Notional Amount	$ 1,472
Fixed Interest Rate	5.29%
Underlying Rate	1 month LIBOR
Expiration Date	Jun. 30, 2015
Fair Value	$ (59)
Interest Rate Swap Agreement 10 [Member]
Derivative [Line Items]
Notional Amount	$ 7,424
Fixed Interest Rate	5.29%
Underlying Rate	1 month LIBOR
Expiration Date	Jun. 30, 2015
Fair Value	$ (295)
Interest Rate Swap Agreement 11 [Member]
Derivative [Line Items]
Notional Amount	$ 640
Fixed Interest Rate	5.29%
Underlying Rate	1 month LIBOR
Expiration Date	Jun. 30, 2015
Fair Value	$ (25)
Interest Rate Swap Agreement 12 [Member]
Derivative [Line Items]
Notional Amount	$ 2,573
Fixed Interest Rate	5.29%
Underlying Rate	1 month LIBOR
Expiration Date	Jun. 30, 2015
Fair Value	$ (102)
Notional Amount	$ 40,000

Note 6 - Financial Instruments and Fair Value (Details) - Fair Values of Derivative Instruments - USD ($) $ in Thousands	Jun. 30, 2013	Dec. 31, 2012
Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Swaps	$ 1,389	$ 1,915

Note 6 - Financial Instruments and Fair Value (Details) - Derivative Financial Instruments - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest rate swaps	$ (85)		$ (103)	$ (170)	$ (208)
Interest rate swaps	249		$ (16)	$ 526	$ (7)
Interest rate swaps	$ 52	$ 53

Note 7 - Segment Information (Details)	6 Months Ended
Note 7 - Segment Information (Details)	Jun. 30, 2013
Segment Reporting [Abstract]
Number of Reportable Segments	1
Number of Operating Segments	3

Note 7 - Segment Information (Details) - Segment Reporting Information - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Truck Segment [Member]
Segment Reporting Information [Line Items]
Revenues from external customers	$ 784,573	$ 830,773	$ 1,536,803	$ 1,603,681
Segment income (loss) before taxes	8,943	28,574	31,091	54,817
As of and for the three months ended June 30, 2012
Segment assets	1,945,552	1,858,045	1,945,552	1,858,045
Other Segments [Member]
Segment Reporting Information [Line Items]
Revenues from external customers	5,101	5,071	9,659	9,492
Segment income (loss) before taxes	366	(15)	318	(182)
As of and for the three months ended June 30, 2012
Segment assets	26,688	27,396	26,688	27,396
Revenues from external customers	789,674	835,844	1,546,462	1,613,173
Segment income (loss) before taxes	9,309	28,559	31,409	54,635
Segment assets	$ 1,972,240	$ 1,885,441	$ 1,972,240	$ 1,885,441	$ 1,881,566

Note 8 - Income Taxes (Details) - USD ($)	Jun. 30, 2013	Jun. 30, 2012
Income Tax Disclosure [Abstract]
Unrecognized Tax Benefits	$ 1,400,000	$ 1,300,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	1,000,000	1,300,000
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	49,000	51,000
Unrecognized Tax Benefits, Income Tax Penalties Accrued	$ 0	$ 0

Note 9 - Accumulated Other Comprehensive Income (Details) - Accmulated Other Comprehensive (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2013	Jun. 30, 2012
Accmulated Other Comprehensive (Loss) [Abstract]
Cash Flow Swaps	$ (1,007)			$ (1,178)
Available for Sale Securities	(578)			(578)
Total	(1,585)	$ (1,756)	$ (1,756)	$ (1,756)
Cash Flow Swaps	153	171
Available for Sale Securities	153	171
Cash Flow Swaps	101	118
Available for Sale Securities	101	118
Cash Flow Swaps	52	53
Available for Sale Securities	52	53
Cash Flow Swaps	(854)	(1,007)	(854)
Available for Sale Securities	(578)	(578)	(578)
Total	$ (1,432)	$ (1,585)	$ (1,432)

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

+ References + Details

Note 9 - Accumulated Other Comprehensive Income (Details) - Loss Reclassified From Accumulated Other Comprehensive (Loss) Into Earnings - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Losses on cash flow swaps to:
Interest expense	$ 85	$ 103	$ 170	$ 208
Income tax benefit	(33)	(40)	(65)	(81)
Total reclassifications	$ 52	$ 63	$ 105	$ 127

Note 10 - Acquisitions (Details) $ in Millions	3 Months Ended
Note 10 - Acquisitions (Details) $ in Millions	Jun. 30, 2013 USD ($)
Acquisition with Piedmont International Trucks, LLC [Member]
Note 10 - Acquisitions (Details) [Line Items]
Business Combination, Consideration Transferred	$ 3.5

Note 10 - Acquisitions (Details) - Purchase Price Allocation $ in Thousands	May 06, 2013 USD ($)
Purchase Price Allocation [Abstract]
Inventory	$ 1,720
Property and equipment	1,485
Prepaid expenses	10
Accounts receivable	364
Accrued expenses	(76)
Total	$ 3,503

Note 11 - Subsequent Event (Details) - Subsequent Event [Member] - GE Capital [Member] - USD ($) $ in Millions	Jul. 11, 2013	Jun. 30, 2013
Note 11 - Subsequent Event (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars)	$ 750.0	$ 600.0
Debt Instrument, Basis Spread on Variable Rate	2.03%
Line of Credit Facility, Commitment Fee Percentage	0.35%
Written Notice Period for Termination of Credit Agreement	120 days