Loss on Disposal of Assets and Costs from Exit and Disposal Activities - Summary of Loss on Disposal of Assets and Costs from Exit and Disposal Activities (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Discontinued Operations And Disposal Groups [Abstract]
Headcount reduction	$ 498		$ 1,601
Total 2021 Restructuring Plan activities	498		1,601
Loss on other disposals and partial disposals of property, plant and equipment	129	$ 444	673	$ 1,151
Acquisition related severance and other costs		1,560		1,560
Total loss on disposal of assets and costs from exit and disposal activities	$ 627	$ 2,004	$ 2,274	$ 2,711