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SEGMENT INFORMATION - Disaggregation of Revenue by Geographic Area (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 30, 2019
Mar. 31, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]    
Total revenue $ 604,569 $ 493,970
U.S.    
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]    
Total revenue 350,176 248,980
Europe    
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]    
Total revenue 166,365 160,826
Canada    
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]    
Total revenue 53,979 48,578
Asia Pacific    
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]    
Total revenue 33,179 34,520
Other    
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]    
Total revenue $ 870 $ 1,066