Equity Method Investments and Related-Party Transactions - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019	Apr. 30, 2021
Schedule of Equity Method Investments [Line Items]
Foreign currency translation adjustments, net of tax		$ 15,851	$ (11,621)	$ (9,985)
Income from equity method investments		556	4,470	2,998
Euro Infrastructure Co [Member]
Schedule of Equity Method Investments [Line Items]
Payments, net of transaction costs, to acquire the issued shares in investment	$ 139,500
Equity method investment ownership percentage	49.00%
Foreign currency translation adjustments, net of tax		$ 12,200	(3,800)	(5,600)
Maximum useful life of intangible assets basis difference, years		11 years
Weighted average useful life of intangible assets basis difference, years		10 years
Maximum useful life of tangible assets basis difference, years		11 years
Weighted average useful life of tangible assets basis difference, years		11 years
Income from equity method investments			$ 4,500	$ 3,000
Retained earnings of undistributed cumulative earnings in equity interests, net of tax		$ 10,800
Euro Infrastructure Co [Member] | Euro​ Infrastructure​ Co Step Acquisition [Member] | Subsequent Event [Member]
Schedule of Equity Method Investments [Line Items]
Percentage of additional interest purchased in subsidiary acquired					51.00%