Segment Information - Pre-Tax Depreciation and Amortization by Operating Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
Depreciation and amortization of property and equipment	$ 7,319	$ 5,524	$ 21,820	$ 15,506
Amortization of intangible assets	9,433	5,946	29,555	13,590
Depreciation and amortization, total	16,752	11,470	51,375	29,096
North America Segment [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization of property and equipment	5,907	4,371	17,559	12,114
Amortization of intangible assets	8,730	5,765	27,594	13,037
EMEA Segment [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization of property and equipment	1,269	1,013	3,846	2,980
Amortization of intangible assets	585	67	1,625	205
APAC Segment [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization of property and equipment	143	140	415	412
Amortization of intangible assets	$ 118	$ 114	$ 336	$ 348