Common Class A [Member] Common Class B [Member] Class of Stock [Axis] Statement of Financial Position [Abstract] Cash and cash equivalents CASH AND CASH EQUIVALENTS, beginning of period CASH AND CASH EQUIVALENTS, end of period Accounts receivable, net Note receivable affiliate Inventories, net Prepaid expenses and other Asset held for sale Deferred income taxes, net Total current assets Investments Property and equipment, net Goodwill, net Goodwill Other assets, net Total assets Segment assets, by segment Floor plan notes payable Current maturities of long-term debt Current maturities of capital lease obligations Liabilities directly associated with asset held for sale Trade accounts payable Customer deposits Accrued expenses Total current liabilities Long-term debt, net of current maturities Capital lease obligations, net of current maturities Other long-term liabilities Deferred income taxes, net Preferred stock, par value $.01 per share; 1,000,000 shares authorized; 0 shares outstanding in 2015 and 2014 Preferred stock, par value (in Dollars per share) Preferred stock, shares authorized Preferred stock, shares outstanding Common stock, par value $.01 per share; 60,000,000 class A shares and 20,000,000 class B shares authorized; 30,157,533 class A shares and 10,092,981 class B shares outstanding in 2015; and 29,889,332 class A shares and 9,999,122 class B shares outstanding in 2014 Common stock, par value (in Dollars per share) Common stock, shares authorized Common stock, shares outstanding Additional paid-in capital Treasury stock, at cost: 2,616,657 class B shares in 2015; and 2,560,580 class B shares in 2014 Treasury stock, shares Retained earnings Accumulated other comprehensive loss, net of tax Balance, Total Total shareholders’ equity Total liabilities and shareholders’ equity Income Statement [Abstract] New and used commercial vehicle sales Parts and service sales Lease and rental Finance and insurance Other Total revenue Revenues from external customers, by segment New and used commercial vehicle sales Parts and service sales Lease and rental Total cost of products sold Gross profit Selling, general and administrative Depreciation and amortization Gain (loss) on sale of assets Operating income Interest expense, net Income before taxes Provision for income taxes Net income Net income Earnings per common share - Basic (in Dollars per share) Earnings per common share - Diluted (in Dollars per share) Basic (in Shares) Denominator for basic earnings per share – weighted average shares outstanding Diluted (in Shares) Denominator for diluted earnings per share – adjusted weighted average shares outstanding and assumed conversions Comprehensive income Statement of Cash Flows [Abstract] Depreciation and amortization Loss (gain) on sale of property and equipment Stock-based compensation expense related to employee stock options and employee stock purchases Deferred income tax (benefit) Excess tax expense (benefit) from stock-based compensation Change in accounts receivable, net Change in inventories, net Change in prepaid expenses and other, net Change in trade accounts payable (Payments) draws on floor plan notes payable – trade, net Change in customer deposits Change in accrued expenses Net cash (used in) operating activities Acquisition of property and equipment Proceeds from the sale of property and equipment Business acquisitions Payments to Acquire Businesses, Gross Change in other assets Net cash used in investing activities Draws on floor plan notes payable – non-trade, net Proceeds from long-term debt Principal payments on long-term debt Principal payments on capital lease obligations Issuance of shares relating to employee stock options and employee stock purchases Excess tax benefits (expense) from stock-based compensation Common stock repurchased Net cash provided by (used in) financing activities NET DECREASE IN CASH AND CASH EQUIVALENTS Interest Income taxes, net of refunds Common stock issued related to business acquisition Assets acquired under capital leases Disclosure Text Block [Abstract] Disclosure Text Block Supplement [Abstract] Commitments and Contingencies Disclosure [Abstract] Earnings Per Share [Abstract] Earnings Per Share Calculation [Abstract] Net income available to common shareholders (in Dollars) Employee and director stock options and restricted share awards Basic earnings per common share (in Dollars per share) Diluted earnings per common share and common share equivalents (in Dollars per share) Anti-dilutive Securities [Abstract] Weighted average anti-dilutive options Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Fair Value Disclosures [Abstract] Investment in Auction Rate Securities - Fair Value [Abstract] Major Types of Debt and Equity Securities [Axis] Auction Rate Securities [Member] Investment in auction rate securities Fair Value Available-for-sale Securities Fair Value, Hierarchy [Axis] Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 3 [Member] Investment in Auction Rate Securities [Abstract] Cost Basis Amount Available-for-sale Securities, Amortized Cost Basis Gross Unrealized Loss In Accumulated OCI Derivative Financial Instruments [Abstract] Derivative Instrument [Axis] Interest Rate Swap Agreement 1 [Member] Current Notional Amount Derivative Asset, Notional Amount Fixed Interest Rate Expiration Date Fair Value Interest Rate Swap Agreement 2 [Member] Interest Rate Swap Agreement 3 [Member] Interest Rate Swap Agreement 4 [Member] Interest Rate Swap Agreement 5 [Member] Interest Rate Swap Agreement 6 [Member] Interest Rate Swap Agreement 7 [Member] Interest Rate Swap Agreement 8 [Member] Fair Values of Derivative Instruments [Abstract] Balance Sheet Location [Axis] Other Liabilities [Member] Interest Rate Swaps Pre-tax Effect of Interest Rate Swaps [Abstract] Interest rate swaps Changes in Value, Cash Flow Swaps Interest rate swaps Loss Reclassified from Accumulated Other Comprehensive Loss into Earnings Income Statement Location [Axis] Interest Expense [Member] Segment Reporting [Abstract] Segment Reporting Information [Abstract] Segment income (loss) before taxes Segments [Axis] Truck Segment [Member] Other Segments [Member] Income Tax Disclosure [Abstract] Accumulated Other Comprehensive (Loss) [Abstract] Balance, Cash Flow Swaps Balance, Available for Sale Securities Changes in Value, Total Income Tax Deferred, Cash Flow Swaps Income Tax Deferred, Total Equity Components [Axis] Reclassifications [Member] Loss Reclassified from Accumulated Other Comprehensive (Loss) into Earnings [Abstract] Income tax benefit Business Combinations [Abstract] Purchase Price Allocation [Abstract] Business Acquisition [Axis] Effingham Truck Sales, Inc. [Member] Inventory Property, plant and equipment Accounts receivable Prepaid expenses Other Total CIT, Inc [Member] Franchise rights Accrued expenses Subsequent Events [Abstract] Assets Current assets: Liabilities and shareholders’ equity Current liabilities: Shareholders’ equity: Revenues: Cost of products sold: Earnings per common share: Weighted average shares outstanding: CASH FLOWS FROM OPERATING ACTIVITIES: Adjustments to reconcile net income to net cash provided by (used in) operating activities: CASH FLOWS FROM INVESTING ACTIVITIES: CASH FLOWS FROM FINANCING ACTIVITIES: SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION: Cash paid during the period for: Noncash investing and financing activities: Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Other Assets Disclosure [Text Block] Commitments and Contingencies Disclosure [Text Block] Earnings Per Share [Text Block] Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Numerator: Numerator for basic and diluted earnings per share – Denominator– Effect of dilutive securities– Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Fair Value Disclosures [Text Block] Fair Value, Assets Measured on Recurring Basis [Table Text Block] Schedule of Available-for-sale Securities Reconciliation [Table Text Block] December 31, 2014 Schedule of Derivative Instruments [Table Text Block] Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss) [Table Text Block] Segment Reporting Disclosure [Text Block] Schedule of Segment Reporting Information, by Segment [Table Text Block] As of and for the three months ended March 31, 2014 Income Tax Disclosure [Text Block] Comprehensive Income (Loss) Note [Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Losses on cash flow swaps to: Business Combination Disclosure [Text Block] Schedule of Business Acquisitions, by Acquisition [Table Text Block] Subsequent Events [Text Block] Finite-Lived Intangible Assets by Major Class [Axis] Computer Software, Intangible Asset [Member] Selling, General and Administrative Expenses [Member] Derivative, by Nature [Axis] Interest Rate Swap [Member] Hedging Relationship [Axis] Cash Flow Hedging [Member] Goodwill Acquired [Member] Yancey Truck Centers, LLC [Member] Subsequent Event Type [Axis] Subsequent Event [Member] Capitalized Computer Software, Net Capitalized Computer Software, Accumulated Amortization Finite-Lived Intangible Asset, Useful Life Amortization of Intangible Assets Finite-Lived Intangible Assets, Amortization Expense, Year Four Finite-Lived Intangible Assets, Amortization Expense, Year Five Finite-Lived Intangible Assets, Amortization Expense, Year Two Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months Finite-Lived Intangible Assets, Amortization Expense, Year Three Indefinite-Lived Franchise Rights Goodwill and Intangible Asset Impairment Allocated Share-based Compensation Expense Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Derivative, Basis Spread on Variable Rate Asset Impairment Charges Available-for-sale Debt Securities Gross Unrealized Gain Interest Rate Cash Flow Hedge Liability at Fair Value Number of Reportable Segments Number of Operating Segments Unrecognized Tax Benefits that Would Impact Effective Tax Rate Unrecognized Tax Benefits, Income Tax Penalties Accrued Unrecognized Tax Benefits, Interest on Income Taxes Expense Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Business Combination, Consideration Transferred Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in Shares) Business Acquisition, Equity Interest Issued or Issuable, Value Assigned Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Real Estate Class of Stock [Domain] Equity Component [Domain] Note 9 - Accumulated Other Comprehensive Income (Loss) (Tables) [Table] Note 9 - Accumulated Other Comprehensive Income (Loss) (Tables) [Line Items] Major Types of Debt and Equity Securities [Domain] Fair Value Hierarchy [Domain] Note 6 - Financial Instruments and Fair Value (Details) - Investment in Auction Rate Securities - Fair Value [Table] Note 6 - Financial Instruments and Fair Value (Details) - Investment in Auction Rate Securities - Fair Value [Line Items] Note 6 - Financial Instruments and Fair Value (Details) - Investment in Auction Rate Securities [Table] Note 6 - Financial Instruments and Fair Value (Details) - Investment in Auction Rate Securities [Line Items] Derivative Contract [Domain] Derivative [Table] Derivative [Line Items] Balance Sheet Location [Domain] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Derivatives, Fair Value [Line Items] Income Statement Location [Domain] Note 6 - Financial Instruments and Fair Value (Details) - Pre-tax Effect of Interest Rate Swaps [Table] Note 6 - Financial Instruments and Fair Value (Details) - Pre-tax Effect of Interest Rate Swaps [Line Items] Segments [Domain] Schedule of Segment Reporting Information, by Segment [Table] Segment Reporting Information [Line Items] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Line Items] Business Acquisition, Acquiree [Domain] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Line Items] Finite-Lived Intangible Assets, Major Class Name [Domain] Note 2 - Other Assets (Details) [Table] Note 2 - Other Assets (Details) [Line Items] Note 5 - Stock Options and Restricted Stock Awards (Details) [Table] Note 5 - Stock Options and Restricted Stock Awards (Details) [Line Items] Hedging Relationship [Domain] Derivative, Name [Domain] Note 6 - Financial Instruments and Fair Value (Details) [Table] Note 6 - Financial Instruments and Fair Value (Details) [Line Items] Note 10 - Acquisitions (Details) [Table] Note 10 - Acquisitions (Details) [Line Items] Subsequent Event Type [Domain] Note 11 - Subsequent Event (Details) [Table] Note 11 - Subsequent Event (Details) [Line Items] Amount of real estate acquired, at the acquisition date. Total cost related to parts sold to retail and wholesale customers, as well as costs related to vehicle services and repairs. Revenues recognized during the period representing fees earned for the arrangement of commercial vehicle financing for customers through various institutions as well as the sale of various insurance and commercial vehicle service contracts to customers. Amounts borrowed to finance the purchase of new and used commercial vehicle inventory. Increase or decrease in amounts borrowed to finance the purchase of new and used commercial vehicle inventory. The net change during the reporting period in commercial vehicle floor plan due by the reporting entity. Aggregate revenue recognized during the period derived from parts sold to retail and wholesale customers, as well as revenue from commercial vehicle services and repairs. CIT Inc [Member] Represents CIT, Inc. Construction Contracts For Facilities [Member] Represents the construction contracts for facilities. Effingham Truck Sales Inc [Member] Represents information pertaining to Effingham Truck Sales, Inc. Goodwill Acquired [Member] Represents information pertaining to goodwill acquired which is amortized for tax purposes. Interest Rate Swap Agreement 1 [Member] Represents the first interest rate swap agreement. Interest Rate Swap Agreement 2 [Member] Represents the second interest rate swap agreement. Interest Rate Swap Agreement 3 [Member] Represents the third interest rate swap agreement. Interest Rate Swap Agreement 4 [Member] Represents the fourth interest rate swap agreement. Interest Rate Swap Agreement 5 [Member] Represents the fifth interest rate swap agreement. Interest Rate Swap Agreement 6 [Member] Represents the sixth interest rate swap agreement. Interest Rate Swap Agreement 7 [Member] Represents the seventh interest rate swap agreement. Interest Rate Swap Agreement 8 [Member] Represents the eighth interest rate swap agreement. North Florida Truck Parts Inc [Member] Represents North Florida Truck Parts, Inc. Reclassifications [Member] Represents the re-classifications. Truck Segment [Member] Represents the truck segment. Yancey Truck Centers LLC [Member] Represents information pertaining to Yancey Truck Centers, LLC. Document and Entity Information [Abstract] Document Information [Table] Document Information [Line Items] CostOfProductsSoldPartsAndServiceSales Gross Profit Earnings Per Share, Diluted Increase (Decrease) in Inventories Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Gain (Loss) on Disposition of Property Plant Equipment Income (Loss) from Continuing Operations, Per Basic Share Operating Income (Loss) Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Entity Common Stock, Shares Outstanding Entity Well-known Seasoned Issuer Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Entity Registrant Name Entity Voluntary Filers Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax Deferred Tax Assets, Net of Valuation Allowance, Current Entity Filer Category Entity Public Float Cost of Goods Sold Document Fiscal Period Focus Current Fiscal Year End Date Capital Lease Obligations, Noncurrent Payments to Acquire Property, Plant, and Equipment Cash and Cash Equivalents, Period Increase (Decrease) Assets, Current Interest Income (Expense), Net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Net Cash Provided by (Used in) Operating Activities Liabilities, Current Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities Amendment Flag Treasury Stock, Value Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Depreciation, Depletion and Amortization Depreciation, Depletion and Amortization, Nonproduction Income Tax Expense (Benefit) Document Period End Date Stockholders' Equity Attributable to Parent Payments for Repurchase of Common Stock Cash Flow Hedge Derivative Instrument Liabilities at Fair Value Liabilities and Equity Entity Central Index Key Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory Excess Tax Benefit from Share-based Compensation, Operating Activities Payments for (Proceeds from) Other Investing Activities Income (Loss) from Continuing Operations Attributable to Parent Repayments of Long-term Debt Income (Loss) from Continuing Operations, Per Diluted Share Stock Issued Entity Current Reporting Status Operating Leases, Rent Expense Cost of Revenue Net Cash Provided by (Used in) Financing Activities Other Revenue, Net Increase (Decrease) in Receivables Document Fiscal Year Focus Increase (Decrease) in Prepaid Expense and Other Assets Earnings Per Share, Basic Repayments of Long-term Capital Lease Obligations Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax Other Comprehensive Income (Loss), Tax Amendment Description Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Document Type Net Cash Provided by (Used in) Investing Activities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Statement [Table] Statement [Line Items] Scenario [Axis]