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Credit Facility and Other Long Term Debt - Interest Expense Related to Convertible Senior Notes (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Debt Disclosure [Abstract]        
Interest income (expense), net $ (9,261) $ (14,955) $ (36,705) $ (32,251)