Segment Information and Geographic Data - Long Lived Assets by Geographical Region (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Total long lived assets	$ 358,446	$ 377,016
Americas [Member]
Segment Reporting Information [Line Items]
Total long lived assets	198,979	206,789
Europe [Member]
Segment Reporting Information [Line Items]
Total long lived assets	148,715	159,338
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Total long lived assets	$ 10,752	$ 10,889
Outside Of Americas [Member] | Assets Total [Member] | Geographic Concentration Risk [Member]
Segment Reporting Information [Line Items]
Percentage of long lived assets held outside of the Americas	44.00%	45.00%