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Segment Information - Reportable Segment Revenue, Income (Loss) Before Income Taxes, (Provision) Benefit for Income Taxes and Net Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Revenues	$ 2,808,376	$ 2,860,026
Income (loss) before income taxes	52,176	46,167
Provision for income taxes	(13,528)	(10,353)
NET INCOME (LOSS)	38,648	35,814
U.S.
Segment Reporting Information [Line Items]
Revenues	2,062,782	2,088,486
Income (loss) before income taxes	46,367	40,510
Provision for income taxes	(12,413)	(9,357)
NET INCOME (LOSS)	33,954	31,153
Gain on real estate and dealership transactions	3,800
Loss for non-cash asset impairments	1,500
U.K.
Segment Reporting Information [Line Items]
Revenues	642,158	660,542
Income (loss) before income taxes	6,244	5,737
Provision for income taxes	(1,096)	(862)
NET INCOME (LOSS)	5,148	4,875
Brazil
Segment Reporting Information [Line Items]
Revenues	103,436	110,998
Income (loss) before income taxes	(435)	(80)
Provision for income taxes	(19)	(134)
NET INCOME (LOSS)	(454)	$ (214)
U.S. and Brazil
Segment Reporting Information [Line Items]
Loss for litigation settlements	$ 1,900

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