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Acquisitions - Narrative (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2019
USD ($)
store
Dec. 31, 2018
USD ($)
Mar. 31, 2018
USD ($)
Entity Location [Line Items]      
Goodwill | $ $ 932,773 $ 917,419 $ 844,516
Purchase price | $ 23,500    
Payments to Acquire Businesses, Net of Cash Acquired | $ 20,700    
Business Combination, Consideration Transferred, Liabilities Incurred | $ $ 2,800    
Latin America Acquisition      
Entity Location [Line Items]      
Number of stores acquired | store 118    
Number of acquisitions | store 2    
U.S. Acquisition      
Entity Location [Line Items]      
Number of stores acquired | store 10    
Number of acquisitions | store 2