Segement Information Segment Information (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Segment Reporting Information [Line Items]
Number of Reportable Segments			3
Gains (Losses) on Extinguishment of Debt	$ (22,790,000)	$ 0	$ (46,403,000)	$ 0
Asset Impairment Charges	9,373,000	565,000	11,094,000	1,174,000
Assets	3,962,509,000		3,962,509,000		3,819,478,000
Revenues	2,626,448,000	2,340,147,000	7,398,949,000	6,639,089,000
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	43,869,000	52,280,000	131,276,000	151,707,000
Income Tax Expense (Benefit)	(17,707,000)	(19,515,000)	(56,949,000)	(59,436,000)
Net Income (Loss) Attributable to Parent	26,162,000	32,765,000	74,327,000	92,271,000
Net gain on dealership and real estate transactions		200,000		5,400,000
U.S. [Member]
Segment Reporting Information [Line Items]
Loss due to catastrophic events		200,000		7,400,000
Gains (Losses) on Extinguishment of Debt	17,900,000		38,700,000
Asset Impairment Charges	2,600,000		3,600,000
Assets	3,362,758,000		3,362,758,000		3,241,192,000
Revenues	2,175,605,000	1,889,378,000	6,070,827,000	5,492,819,000
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	43,146,000	47,332,000	123,474,000	139,111,000
Income Tax Expense (Benefit)	(20,375,000)	(18,369,000)	(57,439,000)	(56,475,000)
Net Income (Loss) Attributable to Parent	22,771,000	28,963,000	66,035,000	82,636,000
Net gain on dealership and real estate transactions	8,600,000		8,900,000
Acquisition Costs, Period Cost				4,900,000
U.K. [Member]
Segment Reporting Information [Line Items]
Assets	279,299,000		279,299,000		237,960,000
Revenues	252,201,000	234,914,000	751,226,000	613,428,000
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	5,840,000	4,514,000	15,974,000	10,355,000
Income Tax Expense (Benefit)	(1,159,000)	(907,000)	(2,814,000)	(2,260,000)
Net Income (Loss) Attributable to Parent	4,681,000	3,607,000	13,160,000	8,095,000
Acquisition Costs, Period Cost				100,000
Brazil [Member]
Segment Reporting Information [Line Items]
Asset Impairment Charges	4,000,000		4,000,000
Assets	320,452,000		320,452,000		340,326,000
Revenues	198,642,000	215,855,000	576,896,000	532,842,000
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	(5,117,000)	434,000	(8,172,000)	2,241,000
Income Tax Expense (Benefit)	3,827,000	(239,000)	3,304,000	(701,000)
Net Income (Loss) Attributable to Parent	(1,290,000)	195,000	(4,868,000)	1,540,000
Tax impact of deductible goodwill	3,400,000		3,400,000
Acquisition Costs, Period Cost				$ 1,300,000