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Intangible Franchise Rights and Goodwill Goodwill (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Goodwill [Roll Forward]      
Goodwill, Beginning Balance $ 854,915 $ 830,377  
Goodwill, Acquired During Period 33,499 115,317  
Goodwill, Purchase Accounting Adjustments 1,052 1,857  
Goodwill, Written off Related to Sale of Business Unit (4,059) (6,088)  
Goodwill, Impairment Loss   55,386  
Goodwill, Translation Adjustments (8,644) (31,139)  
Goodwill, Subsequent Recognition of Deferred Tax Asset   23  
Goodwill, Ending Balance 876,763 854,915  
Goodwill, Impaired, Accumulated Impairment Loss   97,800 $ 42,400
U.S.      
Goodwill [Roll Forward]      
Goodwill, Beginning Balance 809,775 700,642  
Goodwill, Acquired During Period 0 115,317  
Goodwill, Purchase Accounting Adjustments 28 (73)  
Goodwill, Written off Related to Sale of Business Unit (3,868) (6,088)  
Goodwill, Impairment Loss   0  
Goodwill, Translation Adjustments 0 0  
Goodwill, Subsequent Recognition of Deferred Tax Asset   23  
Goodwill, Ending Balance 805,935 809,775  
U.K.      
Goodwill [Roll Forward]      
Goodwill, Beginning Balance 35,320 35,138  
Goodwill, Acquired During Period 31,644 0  
Goodwill, Purchase Accounting Adjustments 1,024 1,930  
Goodwill, Written off Related to Sale of Business Unit 0 0  
Goodwill, Impairment Loss   0  
Goodwill, Translation Adjustments (10,934) (1,748)  
Goodwill, Subsequent Recognition of Deferred Tax Asset   0  
Goodwill, Ending Balance 57,054 35,320  
Brazil      
Goodwill [Roll Forward]      
Goodwill, Beginning Balance 9,820 94,597  
Goodwill, Acquired During Period 1,855 0  
Goodwill, Purchase Accounting Adjustments 0 0  
Goodwill, Written off Related to Sale of Business Unit (191) 0  
Goodwill, Impairment Loss   55,386  
Goodwill, Translation Adjustments 2,290 (29,391)  
Goodwill, Subsequent Recognition of Deferred Tax Asset   0  
Goodwill, Ending Balance $ 13,774 $ 9,820