Investments - Equity Method Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Equity Securities
Equity method investments, beginning balance	$ 5,300
New investments	45,200	$ 50,800
Reclassification from investments in equity securities to equity method investments	(36,800)
Equity in earnings of unconsolidated affiliates, net	300	0	$ 0
Foreign currency translation adjustments and other	(2,400)	1,800
Equity method investments, ending balance	99,600	5,300
Nonconsolidated Investee or Group of Investees
Equity Securities
Equity method investments, beginning balance	5,300	6,500
New investments	58,700
Reclassification from investments in equity securities to equity method investments	36,800
Equity in earnings of unconsolidated affiliates, net	400	(700)
Foreign currency translation adjustments and other	(1,600)	(500)
Equity method investments, ending balance	$ 99,600	$ 5,300	$ 6,500