Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Assets:
Total assets measured at fair value	$ 3	$ 321
Liabilities:
Total liabilities measured at fair value	127,547	168,350
Derivative
Assets:
Derivative assets	3	321
Liabilities:
Derivative Liability, Current	1,799	433
Contingent consideration
Liabilities:
Total liabilities measured at fair value	11,340	16,535
Deferred consideration
Liabilities:
Total liabilities measured at fair value	114,408	151,382
Level 1
Assets:
Total assets measured at fair value	0	0
Liabilities:
Total liabilities measured at fair value	0	0
Level 1 | Derivative
Assets:
Derivative assets	0	0
Level 1 | Contingent consideration
Liabilities:
Total liabilities measured at fair value	0	0
Level 1 | Deferred consideration
Liabilities:
Total liabilities measured at fair value	0	0
Level 2
Assets:
Total assets measured at fair value	3	321
Liabilities:
Total liabilities measured at fair value	116,207	151,815
Level 2 | Derivative
Assets:
Derivative assets	3	321
Liabilities:
Derivative Liability, Current	1,799	433
Level 2 | Contingent consideration
Liabilities:
Total liabilities measured at fair value	0	0
Level 2 | Deferred consideration
Liabilities:
Total liabilities measured at fair value	114,408	151,382
Level 3
Assets:
Total assets measured at fair value	0	0
Liabilities:
Total liabilities measured at fair value	11,340	16,535
Level 3 | Derivative
Assets:
Derivative assets	0	0
Level 3 | Contingent consideration
Liabilities:
Total liabilities measured at fair value	11,340	16,535
Level 3 | Deferred consideration
Liabilities:
Total liabilities measured at fair value	$ 0	$ 0