Intangible Franchise Rights and Goodwill (Details Textual)	12 Months Ended
	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Countries and States [Line Items]
Impairment of Intangible Assets, Finite-lived	$ 19,332,000	$ 29,823,000
Intangible Franchise Rights and Goodwill (Textual) [Abstract]
Accumulated Impairments		$ 97,800,000
Number of Franchises Disposed	3	10
UNITED KINGDOM
Countries and States [Line Items]
Impairment of Intangible Assets, Finite-lived	$ 0	$ 0
Intangible Franchise Rights and Goodwill (Textual) [Abstract]
Number Of Dealerships Acquired	12	12
Number of Franchises Disposed	1	1
Brazil
Countries and States [Line Items]
Impairment of Intangible Assets, Finite-lived	$ 6,744,000	$ 9,901,000
Intangible Franchise Rights and Goodwill (Textual) [Abstract]
Number Of Dealerships Acquired		1
Number of Franchises Disposed	2	4
U.S.
Countries and States [Line Items]
Impairment of Intangible Assets, Finite-lived	$ 12,588,000	$ 19,922,000
Intangible Franchise Rights and Goodwill (Textual) [Abstract]
Number Of Dealerships Acquired	3
Number of Franchises Disposed		5