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Acquisitions - Narrative (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2020
USD ($)
store
Dec. 31, 2019
USD ($)
store
Business Acquisition [Line Items]    
Purchase price $ 43,600 $ 46,800
Cash paid 41,400 44,900
Liabilities incurred 2,200 1,900
Revenue since acquisition 7,500  
Transaction and integration costs 1,000  
Net earnings since acquisition 300  
Payments for Previous Acquisition 2,900  
Merger and other acquisitions $ 33,434 $ 27,306
Mexico    
Business Acquisition [Line Items]    
Number of stores acquired | store 40 163
Number of acquisitions | store 2 13
United States    
Business Acquisition [Line Items]    
Number of stores acquired | store 22 27
Number of acquisitions | store 2 9
Merger and other acquisitions $ 28,978 $ 11,773