Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Liabilities:
Contingent consideration	$ 104,080	$ 89,850
Capped call derivatives
Assets:
Derivative asset	94,500
Fair Value, Recurring
Assets:
Convertible notes receivable	2,764	2,775
Total assets	98,692	78,025
Liabilities:
Contingent consideration	115,573	103,818
Total Contingent Consideration	266,961	234,025
Fair Value, Recurring | Embedded exchange feature
Liabilities:
Derivative liabilities	150,651	121,756
Fair Value, Recurring | Other Contract
Liabilities:
Derivative liabilities		4,290
Fair Value, Recurring | Derivatives Designated as Hedging Instruments | Foreign Exchange Contract
Assets:
Derivative asset	272	2,893
Liabilities:
Derivative liabilities	728	14
Fair Value, Recurring | Derivatives Not Designated as Hedging Instruments | Freestanding Instrument
Assets:
Derivative asset	1,137	55
Liabilities:
Derivative liabilities	9	4,073
Fair Value, Recurring | Derivatives Not Designated as Hedging Instruments | Capped call derivatives
Assets:
Derivative asset	94,519	72,302
Fair Value, Recurring | Derivatives Not Designated as Hedging Instruments | Interest rate swap contracts
Liabilities:
Derivative liabilities		74
Fair Value, Recurring | Level 1
Assets:
Convertible notes receivable	0	0
Total assets	0	0
Liabilities:
Contingent consideration	0	0
Total Contingent Consideration	0	0
Fair Value, Recurring | Level 1 | Embedded exchange feature
Liabilities:
Derivative liabilities	0	0
Fair Value, Recurring | Level 1 | Other Contract
Liabilities:
Derivative liabilities		0
Fair Value, Recurring | Level 1 | Derivatives Designated as Hedging Instruments | Foreign Exchange Contract
Assets:
Derivative asset	0	0
Liabilities:
Derivative liabilities	0	0
Fair Value, Recurring | Level 1 | Derivatives Not Designated as Hedging Instruments | Freestanding Instrument
Assets:
Derivative asset	0	0
Liabilities:
Derivative liabilities	0	0
Fair Value, Recurring | Level 1 | Derivatives Not Designated as Hedging Instruments | Capped call derivatives
Assets:
Derivative asset	0	0
Fair Value, Recurring | Level 1 | Derivatives Not Designated as Hedging Instruments | Interest rate swap contracts
Liabilities:
Derivative liabilities		0
Fair Value, Recurring | Level 2
Assets:
Convertible notes receivable	0	0
Total assets	1,409	2,948
Liabilities:
Contingent consideration	0	0
Total Contingent Consideration	737	4,161
Fair Value, Recurring | Level 2 | Embedded exchange feature
Liabilities:
Derivative liabilities	0	0
Fair Value, Recurring | Level 2 | Other Contract
Liabilities:
Derivative liabilities		0
Fair Value, Recurring | Level 2 | Derivatives Designated as Hedging Instruments | Foreign Exchange Contract
Assets:
Derivative asset	272	2,893
Liabilities:
Derivative liabilities	728	14
Fair Value, Recurring | Level 2 | Derivatives Not Designated as Hedging Instruments | Freestanding Instrument
Assets:
Derivative asset	1,137	55
Liabilities:
Derivative liabilities	9	4,073
Fair Value, Recurring | Level 2 | Derivatives Not Designated as Hedging Instruments | Capped call derivatives
Assets:
Derivative asset	0	0
Fair Value, Recurring | Level 2 | Derivatives Not Designated as Hedging Instruments | Interest rate swap contracts
Liabilities:
Derivative liabilities		74
Fair Value, Recurring | Level 3
Assets:
Convertible notes receivable	2,764	2,775
Total assets	97,283	75,077
Liabilities:
Contingent consideration	115,573	103,818
Total Contingent Consideration	266,224	229,864
Fair Value, Recurring | Level 3 | Embedded exchange feature
Liabilities:
Derivative liabilities	150,651	121,756
Fair Value, Recurring | Level 3 | Other Contract
Liabilities:
Derivative liabilities		4,290
Fair Value, Recurring | Level 3 | Derivatives Designated as Hedging Instruments | Foreign Exchange Contract
Assets:
Derivative asset	0	0
Liabilities:
Derivative liabilities	0	0
Fair Value, Recurring | Level 3 | Derivatives Not Designated as Hedging Instruments | Freestanding Instrument
Assets:
Derivative asset	0	0
Liabilities:
Derivative liabilities	0	0
Fair Value, Recurring | Level 3 | Derivatives Not Designated as Hedging Instruments | Capped call derivatives
Assets:
Derivative asset	$ 94,519	72,302
Fair Value, Recurring | Level 3 | Derivatives Not Designated as Hedging Instruments | Interest rate swap contracts
Liabilities:
Derivative liabilities		$ 0