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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 |  |

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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-2 + Details
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