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Long-Term Debt (Details Textual) (USD $)
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3 Months Ended | 6 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended | 6 Months Ended | 6 Months Ended | 6 Months Ended | ||||||||||||||||||||||||||||||||
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Jun. 30, 2012
Agreement
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Jun. 30, 2011
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Jun. 30, 2012
Agreement
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Jun. 30, 2011
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Dec. 31, 2011
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Jun. 30, 2012
9% Senior Subordinate Note due 2018 [Member]
Rate
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Dec. 31, 2011
9% Senior Subordinate Note due 2018 [Member]
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Jun. 30, 2012
5% Convertible Senior Note due 2029 [Member]
Rate
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Jun. 30, 2011
5% Convertible Senior Note due 2029 [Member]
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Jun. 30, 2012
5% Convertible Senior Note due 2029 [Member]
D
Rate
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Jun. 30, 2011
5% Convertible Senior Note due 2029 [Member]
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Dec. 31, 2011
5% Convertible Senior Note due 2029 [Member]
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Jun. 30, 2012
Other Debt [Member]
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Dec. 31, 2011
Other Debt [Member]
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Jun. 30, 2012
Senior Subordinated Notes [Member]
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Jul. 02, 2012
Senior Subordinated Notes [Member]
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Dec. 31, 2011
Senior Subordinated Notes [Member]
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Jun. 30, 2012
Senior Notes [Member]
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Dec. 31, 2011
Senior Notes [Member]
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Jun. 30, 2012
Mortgage Loan at Variable Interest Rate [Member]
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Dec. 31, 2011
Mortgage Loan at Variable Interest Rate [Member]
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Jun. 30, 2012
Mortgage Notes Payable [Member]
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Dec. 31, 2011
Mortgage Notes Payable [Member]
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Jun. 30, 2012
Mortgage Notes [Member]
Properties
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Jun. 30, 2012
Derivative Instruments and Hedging Activities [Member]
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Jun. 30, 2012
Derivative Instruments and Hedging Activities [Member]
Other Accrued Liabilities [Member]
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Jun. 30, 2012
Derivative Instruments and Hedging Activities [Member]
Other Long-Term Liabilities [Member]
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Jun. 30, 2012
Maximum [Member]
Rate
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Jun. 30, 2012
Maximum [Member]
Mortgage Loan at Fix Interest Rate [Member]
Rate
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Jun. 30, 2012
Maximum [Member]
Mortgage Loan at Variable Interest Rate [Member]
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Jun. 30, 2012
Minimum [Member]
Rate
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Jun. 30, 2012
Minimum [Member]
Mortgage Loan at Fix Interest Rate [Member]
Rate
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Jun. 30, 2012
Minimum [Member]
Mortgage Loan at Variable Interest Rate [Member]
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Jun. 30, 2012
Weighted Average [Member]
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Jun. 30, 2012
2011 Revolving Credit Facility [Member]
Rate
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Dec. 31, 2011
2011 Revolving Credit Facility [Member]
Rate
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Jun. 30, 2012
2011 Revolving Credit Facility [Member]
Maximum [Member]
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Jun. 30, 2012
2011 Credit Facility [Member]
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Jun. 30, 2012
2011 Credit Facility [Member]
Maximum [Member]
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Mar. 31, 2012
2011 Credit Facility [Member]
Maximum [Member]
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Jun. 30, 2012
2011 Credit Facility [Member]
Minimum [Member]
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Mar. 31, 2012
2011 Credit Facility [Member]
Minimum [Member]
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| Long-Term Debt (Textual) [Abstract] | ||||||||||||||||||||||||||||||||||||||||||
| Debt instrument interest rate stated percentage on note | 9.00% | 5.00% | 5.00% | 7.00% | 10.52% | 7.03% | 9.52% | 4.29% | ||||||||||||||||||||||||||||||||||
| One-month LIBOR rate | 3.50% | 1.25% | ||||||||||||||||||||||||||||||||||||||||
| Receive Rate (1) | one-month LIBOR | |||||||||||||||||||||||||||||||||||||||||
| Debt weighted average interest rate on note | 4.67% | 10.19% | ||||||||||||||||||||||||||||||||||||||||
| Interest rate | 2.00% | 2.25% | ||||||||||||||||||||||||||||||||||||||||
| Discount associated with notes | $ 13,000,000 | $ 13,000,000 | $ 17,700,000 | $ 1,200,000 | $ 1,200,000 | $ 13,000,000 | $ 17,700,000 | $ 800,000 | $ 900,000 | |||||||||||||||||||||||||||||||||
| Premium associated with notes | 1,000,000 | 1,000,000 | 1,200,000 | |||||||||||||||||||||||||||||||||||||||
| Line of credit facility maximum borrowing capacity contingent increase | 225,000,000 | 175,000,000 | ||||||||||||||||||||||||||||||||||||||||
| Percentage of fair market value of common stock to calculate available credit facility | 50.00% | |||||||||||||||||||||||||||||||||||||||||
| Number of common stock shares pledged as collateral | 5,000,000 | |||||||||||||||||||||||||||||||||||||||||
| Borrowing base | 175,000,000 | |||||||||||||||||||||||||||||||||||||||||
| Letters of credit outstanding amount | 39,200,000 | |||||||||||||||||||||||||||||||||||||||||
| Borrowing available | 135,800,000 | |||||||||||||||||||||||||||||||||||||||||
| Indebtedness with outstanding balance | 35,000,000 | |||||||||||||||||||||||||||||||||||||||||
| EBTDAR to rent ratio | 2.94 | 1.50 | 1.00 | 1.00 | ||||||||||||||||||||||||||||||||||||||
| Unsecured senior subordinated obligations, description | 9.0% Notes | |||||||||||||||||||||||||||||||||||||||||
| Debt Instrument, Maturity Date | Mar. 15, 2018 | Oct. 01, 2029 | Jul. 15, 2022 | |||||||||||||||||||||||||||||||||||||||
| Maturity date of 2011 Revolving credit facility and Floor plan facility | Aug. 15, 2016 | |||||||||||||||||||||||||||||||||||||||||
| Debt instrument date of required interest payments | semi-annually on March 15 and September 15 each year | semiannually on April 1 and October 1 of each year | ||||||||||||||||||||||||||||||||||||||||
| Debt instrument earliest redemption date | after March 15, 2014 | 2014-10-01 | ||||||||||||||||||||||||||||||||||||||||
| Aggregate principal amount of notes | 35.00% | 35.00% | ||||||||||||||||||||||||||||||||||||||||
| Indenture 9.0% notes | 101.00% | |||||||||||||||||||||||||||||||||||||||||
| Debt instrument maximum allowed dividends per share | $ 0.10 | $ 0.10 | ||||||||||||||||||||||||||||||||||||||||
| Restrictive covenants | Jun. 30, 2012 | |||||||||||||||||||||||||||||||||||||||||
| Repurchase of principle amount of 5.0% convertible notes | 20,200,000 | |||||||||||||||||||||||||||||||||||||||||
| Loss from repurchase of principle amount of 5.0% convertible notes | 2,600,000 | |||||||||||||||||||||||||||||||||||||||||
| Repurchase price of convertible senior notes | 100.00% | |||||||||||||||||||||||||||||||||||||||||
| Number of business day | 5 | |||||||||||||||||||||||||||||||||||||||||
| Number of consecutive trading days for Class A common stock | 30 days | 20 days | 10 days | |||||||||||||||||||||||||||||||||||||||
| Right to purchase on Second repurchase date | Oct. 01, 2019 | |||||||||||||||||||||||||||||||||||||||||
| Right to purchase on third repurchase date | Oct. 01, 2024 | |||||||||||||||||||||||||||||||||||||||||
| Minimum conversion price | 130.00% | |||||||||||||||||||||||||||||||||||||||||
| Total debt | 537,570,000 | 537,570,000 | 547,619,000 | 210,000,000 | 210,000,000 | 134,905,000 | 134,905,000 | 155,055,000 | 5,590,000 | 5,752,000 | 63,930,000 | 65,640,000 | ||||||||||||||||||||||||||||||
| Debt instrument principal amount per bond | 1,000 | 1,000 | ||||||||||||||||||||||||||||||||||||||||
| Maximum principal amount of notes for each day of measurement period | 98.00% | |||||||||||||||||||||||||||||||||||||||||
| Debt discount on convertible senior notes net of taxes | 12,800,000 | 12,800,000 | ||||||||||||||||||||||||||||||||||||||||
| Conversion rate of convertible senior notes | 75.3017 | |||||||||||||||||||||||||||||||||||||||||
| Conversion price of notes, per share | $ 13.28 | $ 13.28 | ||||||||||||||||||||||||||||||||||||||||
| Debt discount on convertible senior notes | 31,000,000 | |||||||||||||||||||||||||||||||||||||||||
| Interest expense associated with amortization of debt discount and deferred loan costs | 1,400,000 | 1,700,000 | 3,000,000 | 3,400,000 | ||||||||||||||||||||||||||||||||||||||
| Non-convertible borrowing rate | 10.50% | |||||||||||||||||||||||||||||||||||||||||
| Interest expense related to Convertible Notes | 1,700,000 | 2,100,000 | 3,700,000 | 4,300,000 | ||||||||||||||||||||||||||||||||||||||
| Mortgage financing aggregate | 189,200,000 | |||||||||||||||||||||||||||||||||||||||||
| Mortgage financing related to dealership properties | 20 | |||||||||||||||||||||||||||||||||||||||||
| Maturity of secured mortgage notes | between June 2013 and March 2031 | |||||||||||||||||||||||||||||||||||||||||
| Fair value of swap positions | 37,500,000 | 25,000,000 | 12,500,000 | |||||||||||||||||||||||||||||||||||||||
| Notional forward | 2 | 2 | ||||||||||||||||||||||||||||||||||||||||
| Interest rate cash flow swap agreements | 100,000,000 | 100,000,000 | ||||||||||||||||||||||||||||||||||||||||
| Duration of Interest rate cash flow swap agreements | July 2015 and terminate in June 2017 | |||||||||||||||||||||||||||||||||||||||||
| Incremental interest expense | 2,500,000 | 4,400,000 | 6,900,000 | 8,800,000 | ||||||||||||||||||||||||||||||||||||||
| Net expense expected to be reclassified | $ 7,700,000 | $ 7,700,000 | ||||||||||||||||||||||||||||||||||||||||