Segment and Geographic Information - Summary of Revenue and Long-lived Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Revenues	$ 689,125	$ 511,352	$ 435,565
Long-lived assets	85,204	71,795
Americas [Member]
Segment Reporting Information [Line Items]
Revenues	583,164	427,276	369,324
Long-lived assets	68,707	62,376
Europe [Member]
Segment Reporting Information [Line Items]
Revenues	89,751	74,511	59,943
Long-lived assets	16,491	9,410
Asia [Member]
Segment Reporting Information [Line Items]
Revenues	16,210	9,565	$ 6,298
Long-lived assets	$ 6	$ 9