Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Income Tax Contingency [Line Items]
Income taxes paid	$ 40,410,000	$ 28,810,000	$ 46,309,000
Net operating loss carryforwards carried forward indefinitely	110,599,000
Net operating loss carryforwards subject to expiration	44,660,000
Valuation allowance	25,594,000	35,754,000	31,172,000	$ 31,017,000
Increase (decrease) in deferred tax asset	(5,890,000)	(2,267,000)	(1,913,000)
Income tax expense (benefit)	$ 42,842,000	$ 23,089,000	$ 34,829,000
Effective income tax rates	10.50%	7.90%	16.50%
Foreign pre-tax income	$ 205,245,000	$ 192,955,000	$ 171,936,000
Foreign pre-tax income, percent	0.10%	13.80%	16.80%
Tax rate of Swiss subsidiary	(13.00%)	9.00%	7.00%
Blended rate	21.00%	21.00%	21.00%
Undistributed earnings of foreign subsidiaries	$ 1,342,000,000	$ 1,352,000,000
Unrecognized tax benefits	2,880,000	2,845,000	$ 3,495,000	$ 4,770,000
Estimated change in unrecognized tax benefit in fiscal 2015	668,000
Tax related interest and penalties	455,000	455,000
Swiss Federal Tax Administration (FTA)
Income Tax Contingency [Line Items]
Income tax expense (benefit)	2,500,000
Federal
Income Tax Contingency [Line Items]
United States federal net operating loss carryforwards	359,000
Valuation allowance	0	0
Foreign
Income Tax Contingency [Line Items]
United States federal net operating loss carryforwards	155,259,000
Valuation allowance	25,126,000	35,219,000
Increase (decrease) in deferred tax asset	(10,093,000)
Foreign | Increase to Income Tax Expense (Benefit)
Income Tax Contingency [Line Items]
Increase (decrease) in deferred tax asset	(4,203,000)
Foreign | Purchase Accounting Adjustment
Income Tax Contingency [Line Items]
Increase (decrease) in deferred tax asset	(5,890,000)
State
Income Tax Contingency [Line Items]
United States federal net operating loss carryforwards	18,806,000
Valuation allowance	$ 468,000	$ 535,000