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Supplemental Cash Flow Information - Additional Supplemental Cash Flow Information (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Supplemental Cash Flow Elements [Abstract]        
Interest paid $ (8,443) $ (16,312) $ (30,704) $ (45,469)
Income taxes paid (86,077) (40,745) (149,690) (109,271)
Income tax refunds $ 1,087 $ 4,730 $ 5,545 $ 6,058