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Property and equipment, net (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Property, Plant and Equipment [Line Items]      
Total cost $ 1,526,795 $ 1,640,744  
Total accumulated depreciation (730,263) (679,758)  
Property and equipment, net 796,532 960,986  
Depreciation expense 115,031 111,638 $ 94,490
Land      
Property, Plant and Equipment [Line Items]      
Total cost 134,148 146,517  
Buildings and leasehold improvements      
Property, Plant and Equipment [Line Items]      
Total cost 657,652 710,046  
Equipment      
Property, Plant and Equipment [Line Items]      
Total cost $ 734,995 $ 784,181