Accumulated Other Comprehensive Income - Summary of Changes in Accumulated Balances of Other Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 1,311,192	$ 1,035,744	$ 1,020,305
Other comprehensive income (loss) before reclassifications	(8,344)	(483)	(16,889)
Net current period other comprehensive income (loss)	(8,344)	(483)	(16,889)
Ending balance	1,211,018	1,311,192	1,035,744
Unrealized Gains (Losses) on Investments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(275)	(1,418)	0
Other comprehensive income (loss) before reclassifications	558	1,143	(1,418)
Net current period other comprehensive income (loss)	558	1,143	(1,418)
Ending balance	283	(275)	(1,418)
Foreign Currency Translation
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(46,187)	(44,561)	(29,090)
Other comprehensive income (loss) before reclassifications	(8,902)	(1,626)	(15,471)
Net current period other comprehensive income (loss)	(8,902)	(1,626)	(15,471)
Ending balance	(55,089)	(46,187)	(44,561)
Accumulated other comprehensive income (loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(46,462)	(45,979)	(29,090)
Net current period other comprehensive income (loss)	(8,344)	(483)	(16,889)
Ending balance	$ (54,806)	$ (46,462)	$ (45,979)