Goodwill and Intangible Assets - Classes of Intangible Assets (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Total cost of intangibles	$ 501,371	$ 156,548
Accumulated Amortization	50,569	35,895
Finite-lived intangibles, net	437,355
Intangible assets, net	450,802	120,653
Trademarks
Finite-Lived Intangible Assets [Line Items]
Trademark - Indefinite lived	13,447	13,447
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Cost	143,101	143,101
Accumulated Amortization	43,286	35,895
Finite-lived intangibles, net	99,815	$ 107,206
Developed Technology
Finite-Lived Intangible Assets [Line Items]
Cost	310,226
Accumulated Amortization	6,469
Finite-lived intangibles, net	$ 303,757
Marketing Assets
Finite-Lived Intangible Assets [Line Items]
Amortization Period	4 years
Cost	$ 549
Accumulated Amortization	66
Finite-lived intangibles, net	$ 483
Trademarks
Finite-Lived Intangible Assets [Line Items]
Amortization Period	15 years
Cost	$ 31,473
Accumulated Amortization	601
Finite-lived intangibles, net	$ 30,872
Trade Name
Finite-Lived Intangible Assets [Line Items]
Amortization Period	5 years
Cost	$ 2,575
Accumulated Amortization	147
Finite-lived intangibles, net	$ 2,428
Minimum | Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Amortization Period	7 years	7 years
Minimum | Developed Technology
Finite-Lived Intangible Assets [Line Items]
Amortization Period	10 years
Maximum | Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Amortization Period	15 years	15 years
Maximum | Developed Technology
Finite-Lived Intangible Assets [Line Items]
Amortization Period	15 years