Interim Financial Statements (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Balance Sheet information regarding entities accounted for as discontinued operations
Total liabilities	$ 2,592		$ 2,592		$ 51,279
Fair Value of Financial Instruments
Debt instrument, Carrying Value	1,060,964		1,060,964		937,517
5.75% senior subordinated notes due 2022
Balance Sheet information regarding entities accounted for as discontinued operations
Interest rate (as a percent)	5.75%	5.75%	5.75%	5.75%	5.75%
Fair Value of Financial Instruments
Debt instrument, Carrying Value	550,000		550,000		550,000
5.75% senior subordinated notes due 2022 | Level 1
Fair Value of Financial Instruments
Debt instrument, Fair Value	543,070		543,070
Mortgage facilities
Fair Value of Financial Instruments
Debt instrument, Carrying Value	101,445		101,445		104,043
Mortgage facilities | Level 2
Fair Value of Financial Instruments
Debt instrument, Fair Value	101,777		101,777
Retail
Combined financial information regarding entities accounted for as discontinued operations
Revenues	15,158	107,391	162,953	332,878
Pre-tax income (loss)	(955)	(817)	(2,609)	(13,673)
Gain on disposal	(31)	285	809	10,445
Balance Sheet information regarding entities accounted for as discontinued operations
Inventories	10		10		44,649
Other assets	1,055		1,055		26,458
Total assets	1,065		1,065		71,107
Floor plan notes payable (including non-trade)	40		40		36,689
Other liabilities	2,552		2,552		14,590
Total liabilities	$ 2,592		$ 2,592		$ 51,279