Pension Plans - Reconciliation of Plan Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Defined Benefit Plan Net Periodic Benefit Cost [Abstract]
Fair value of plan assets, beginning of year	$ 12,436	$ 10,416
Actual return on plan assets	1,293	1,008
Contributions paid by employer	1,333	1,280
Contributions paid by plan participants	2,704	2,180
Benefits paid	(2,207)	(2,841)
Foreign currency translation	192	393
Fair value of plan assets, end of year	$ 15,751	$ 12,436