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OTHER - Supplemental Cash Flow Information (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Supplemental Cash Flow Information [Abstract]      
Cash paid for interest $ 15,476 $ 18,859 $ 16,319
Cash paid for taxes, net of refunds 5,161 2,057 2,599
Non-cash investing activities:      
Translation adjustment $ (2,062) $ (292) $ (5,906)