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Income Taxes - Additional Information (Detail) - USD ($) | 12 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Mar. 31, 2019 | Mar. 31, 2018
Income Tax Contingency [Line Items] |  |  |  |
Income taxes paid |  | $ 32,002,000 | $ 48,653,000 | $ 53,866,000
Net operating loss carryforwards carried forward indefinitely | $ 186,816,000 |  |  |
Net operating loss carryforwards subject to expiration | 48,409,000 |  |  |
Valuation allowance | 31,928,000 | 20,951,000 | 17,519,000 | $ 15,255,000
Increase (decrease) in deferred tax asset | (940,000) | (229,000) | (1,772,000) |
Income tax expense | 26,761,000 | $ 9,821,000 | $ 21,584,000 |
Effective income tax rates |  | 15.70% | 6.70% | 11.90%
Deferred tax asset |  | $ 22,500,000 |  |
Foreign pre-tax income | $ 114,080,000 | $ 110,744,000 | $ 128,872,000 |
Foreign pre-tax income, percent | 6.80% | (7.40%) | 12.30% |
Tax rate of Swiss subsidiary | 8.00% | 3.00% | 4.00% |
Blended rate | 21.00% |  |  |
Undistributed earnings of foreign subsidiaries |  | $ 1,591,000,000 | $ 1,376,000,000 |
Unrecognized tax benefits | $ 6,785,000 | 7,795,000 | $ 20,165,000 | $ 1,568,000
Estimated change in unrecognized tax benefit in fiscal 2015 | 1,850,000 |  |  |
Tax related interest and penalties | 400,000 | 285,000 |  |
Federal |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
United States federal net operating loss carryforwards | 1,078,000 |  |  |
Valuation allowance | 0 | 0 |  |
Foreign |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
United States federal net operating loss carryforwards | 235,225,000 |  |  |
Valuation allowance | 31,242,000 | 20,055,000 |  |
Increase (decrease) in deferred tax asset | 11,187,000 |  |  |
Income tax expense | 1,883,000 |  |  |
State |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
United States federal net operating loss carryforwards | 28,955,000 |  |  |
Valuation allowance | 686,000 | $ 896,000 |  |
Increase to Income Tax Expense (Benefit) | Foreign |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Increase (decrease) in deferred tax asset | 5,743,000 |  |  |
Purchase Accounting Adjustment | Foreign |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Increase (decrease) in deferred tax asset | 6,384,000 |  |  |
Foreign Currency Translation Adjustment And Offset Adjustment To Net Operating Losses | Foreign |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Increase (decrease) in deferred tax asset | $ (940,000) |  |  |

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