Equity Method Investments and Related Party Transactions - Additional Information (Detail) - USD ($)	1 Months Ended	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Schedule of Equity Method Investments [Line Items]
Payment related to acquisition of business, net of cash acquired				$ 140,378,000
Foreign currency translation adjustments, net of tax		$ (9,985,000)	$ 15,785,000	$ (2,329,000)
Income from equity method investments		2,998,000	1,978,000
Euro Infrastructure Co [Member]
Schedule of Equity Method Investments [Line Items]
Payments, net of transaction costs, to acquire the issued shares in investment	$ 139,500,000
Equity method investment ownership percentage	49.00%			49.00%
Transaction costs	$ 2,400,000			$ 2,400,000
Payment related to acquisition of business, net of cash acquired	$ 141,900,000
Foreign currency translation adjustments, net of tax		$ (5,600,000)	12,700,000
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		$ 3,000,000.0	$ 2,000,000.0	$ 0
Retained earnings of undistributed cumulative earnings in equity interests, net of tax		$ 6,400,000