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Acquisitions - Additional Information (Detail) - USD ($) $ in Thousands		12 Months Ended
	Sep. 30, 2019	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Business Acquisition [Line Items]
Goodwill		$ 700,640	$ 705,593	$ 663,936
Estimated tax-deductible goodwill		$ 101,499	110,063
Measurement period adjustments			2,996
NorthStar
Business Acquisition [Line Items]
Payments to acquire businesses	$ 77,777
Debt assumed	107,018
Goodwill	76,784
Measurement period adjustments			$ 2,996
NorthStar | Developed Technology Rights
Business Acquisition [Line Items]
Acquired intangible assets	$ 19,000
Estimated useful lives of finite-lived assets	10 years
NorthStar | Trademarks
Business Acquisition [Line Items]
Acquired intangible assets	$ 6,000
Estimated useful lives of finite-lived assets	5 years
Estimated tax-deductible goodwill	$ 68,522
NorthStar | Customer relationships
Business Acquisition [Line Items]
Acquired intangible assets	$ 9,000
Minimum
Business Acquisition [Line Items]
Estimated useful lives of finite-lived assets		3 years
Minimum | NorthStar | Customer relationships
Business Acquisition [Line Items]
Estimated useful lives of finite-lived assets	15 years
Maximum
Business Acquisition [Line Items]
Estimated useful lives of finite-lived assets		20 years
Maximum | NorthStar | Customer relationships
Business Acquisition [Line Items]
Estimated useful lives of finite-lived assets	18 years

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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