Segment Information Segment Information (Details textuals) $ in Thousands	3 Months Ended						12 Months Ended
	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Segment Reporting Information [Line Items]
Chargeback reserves for finance and insurance revenues		$ 14,700
Payments for Legal Settlements							$ (1,210,000)
deferred tax effect - tax cut job act benefit							$ (73,028)	$ 0	$ 0
Net Gain (Loss) on Real Estate and Dealership Transactions								2,200
Number of Reportable Segments							3
ASSET IMPAIRMENTS	$ 10,000	$ 9,500	$ 20,000	$ 10,900	$ 1,000	$ 900	$ 19,506	32,838	87,562
Deferred Foreign Income Tax Expense (Benefit)							3,046	6,420	5,412
U.S.
Segment Reporting Information [Line Items]
Chargeback reserves for finance and insurance revenues							6,600
Net Gain (Loss) on Real Estate and Dealership Transactions								2,700
ASSET IMPAIRMENTS							12,762	21,794	18,983
Brazil
Segment Reporting Information [Line Items]
Net Gain (Loss) on Real Estate and Dealership Transactions								(800)
ASSET IMPAIRMENTS							6,744	10,843	68,249
Deferred Foreign Income Tax Expense (Benefit)								1,700
U.K.
Segment Reporting Information [Line Items]
Net Gain (Loss) on Real Estate and Dealership Transactions								(300)
ASSET IMPAIRMENTS							0	201	330
Pre-tax [Member] | U.S.
Segment Reporting Information [Line Items]
Payments for Legal Settlements							(1,800)	11,700	(1,000)
Loss from Catastrophes							8,800	5,900	1,600
Net Gain (Loss) on Real Estate and Dealership Transactions								2,700	8,900
Severance Costs								1,800
Pre-tax [Member] | Brazil
Segment Reporting Information [Line Items]
Net Gain (Loss) on Real Estate and Dealership Transactions								800
Net of taxes [Member] | U.S.
Segment Reporting Information [Line Items]
Payments for Legal Settlements								(7,300)
Loss from Catastrophes								3,700	1,000
Net Gain (Loss) on Real Estate and Dealership Transactions								1,700	5,500
Severance Costs								1,200
ASSET IMPAIRMENTS							8,000	13,500	12,000
Net of taxes [Member] | Brazil
Segment Reporting Information [Line Items]
ASSET IMPAIRMENTS							$ 4,400	$ 6,900	$ 62,400