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Supplemental Cash Flow Information - Additional Supplemental Cash Flow Information (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Supplemental Cash Flow Elements [Abstract]        
Interest paid $ (8,989) $ (15,725) $ (22,261) $ (29,157)
Income taxes paid (9,392) (60,333) (63,613) (68,526)
Income tax refunds $ 2,119 $ 50 $ 4,458 $ 1,328