Intangible Franchise Rights and Goodwill (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2016 USD ($)
Intangible Franchise Rights [Roll Forward]
Intangible Franchise Rights, Beginning Balance	$ 307,588
Additions through acquisitions	14,087
Currency Translation	1,299
Intangible Franchise Rights, Ending Balance	322,974
Goodwill [Roll Forward]
Goodwill, Beginning Balance	854,915
Goodwill, Acquired During Period	31,773
Goodwill, Purchase Accounting Adjustments	1,116
Goodwill, Written off Related to Sale of Business Unit	(2,226)
Goodwill, Translation Adjustments	(3,597)
Goodwill, Ending Balance	881,981	[1]
Goodwill, Impaired, Accumulated Impairment Loss	97,800
U.S. [Member]
Intangible Franchise Rights [Roll Forward]
Intangible Franchise Rights, Beginning Balance	285,659
Additions through acquisitions	0
Currency Translation	0
Intangible Franchise Rights, Ending Balance	285,659
Goodwill [Roll Forward]
Goodwill, Beginning Balance	809,775	[1]
Goodwill, Acquired During Period	0
Goodwill, Purchase Accounting Adjustments	39
Goodwill, Written off Related to Sale of Business Unit	(2,035)
Goodwill, Translation Adjustments	0
Goodwill, Ending Balance	807,779	[1]
U.K. [Member]
Intangible Franchise Rights [Roll Forward]
Intangible Franchise Rights, Beginning Balance	7,773
Additions through acquisitions	14,087
Currency Translation	(1,903)
Intangible Franchise Rights, Ending Balance	19,957
Goodwill [Roll Forward]
Goodwill, Beginning Balance	35,320	[1]
Goodwill, Acquired During Period	30,755
Goodwill, Purchase Accounting Adjustments	1,077
Goodwill, Written off Related to Sale of Business Unit	0
Goodwill, Translation Adjustments	(5,902)
Goodwill, Ending Balance	61,250	[1]
Brazil [Member]
Intangible Franchise Rights [Roll Forward]
Intangible Franchise Rights, Beginning Balance	14,156
Additions through acquisitions	0
Currency Translation	3,202
Intangible Franchise Rights, Ending Balance	17,358
Goodwill [Roll Forward]
Goodwill, Beginning Balance	9,820	[1]
Goodwill, Acquired During Period	1,018
Goodwill, Purchase Accounting Adjustments	0
Goodwill, Written off Related to Sale of Business Unit	(191)
Goodwill, Translation Adjustments	2,305
Goodwill, Ending Balance	$ 12,952	[1]

[1] 1) Net of accumulated impairment of $97.8 million.