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Acquisitions - Narrative (Details)
$ in Thousands
6 Months Ended
Jun. 30, 2019
USD ($)
store
Dec. 31, 2018
USD ($)
Jun. 30, 2018
USD ($)
Entity Location [Line Items]      
Goodwill | $ $ 940,653 $ 917,419 $ 857,070
Purchase price | $ 37,000    
Payments to Acquire Businesses, Net of Cash Acquired | $ 33,200    
Business Combination, Consideration Transferred, Liabilities Incurred | $ $ 3,800    
Latin America Acquisition      
Entity Location [Line Items]      
Number of stores acquired | store 158    
Number of acquisitions | store 10    
U.S. Acquisition      
Entity Location [Line Items]      
Number of stores acquired | store 20    
Number of acquisitions | store 3