Fair Value Measurements - Summary of Financial Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Financial Liabilities
Interest Rate Swap Liability	$ (10,957)
Contingent Consideration Arrangements	(118,500)	$ (118,700)
Total Financial Liabilities	(129,457)	(118,700)
Level 2
Financial Liabilities
Interest Rate Swap Liability	(10,957)
Total Financial Liabilities	(10,957)
Level 3
Financial Liabilities
Contingent Consideration Arrangements	(118,500)	(118,700)
Total Financial Liabilities	$ (118,500)	$ (118,700)