Segment Information and Geographic Data - Long Lived Assets by Geographical Region (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Total long lived assets	$ 360,455	$ 318,039
Americas [Member]
Segment Reporting Information [Line Items]
Total long lived assets	196,742	175,821
Europe [Member]
Segment Reporting Information [Line Items]
Total long lived assets	151,431	127,395
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Total long lived assets	$ 12,282	$ 14,823
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	45.00%	45.00%