Fair Value Measurements - Financial Assets and (Liabilities) Carried at Fair Value (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate contract asset, long-term		$ 1,192
Interest rate contract liabilities, current and long-term	$ (4,915)	(290)
Foreign currency contract assets, current and long-term	2,325	2,447
Foreign currency contract liabilities, current and long-term	(4,219)	(4,255)
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liabilities	(64,665)	(76,709)
Estimate of Fair Value, Fair Value Disclosure
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate contract asset, long-term		1,192
Interest rate contract liabilities, current and long-term	(4,915)	(290)
Foreign currency contract assets, current and long-term	2,325	2,447
Foreign currency contract liabilities, current and long-term	(4,219)	(4,255)
Contingent consideration liabilities	$ (64,665)	$ (76,709)