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Schedule of Reconciliation of Obligations and Fair Values of Plan Assets (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Mar. 31, 2018
Compensation And Retirement Disclosure [Abstract] |  |  |
Benefit Obligation at April 1, | $ 33,730 | $ 33,370 |
Service Cost - Benefits Earned During the Period | 339 | 399 | $ 710
Interest Cost on Projected Benefit Obligation | 1,351 | 1,347 | 1,466
Actuarial (Gain) Loss | 2,464 | (306) |
Benefits Paid | (1,183) | (1,080) |
Benefit Obligation at March 31, | 36,701 | 33,730 | 33,370
Fair Value of Plan Assets at April 1, | 36,541 | 33,412 |
Actual Return on Plan Assets | 3,651 | 2,169 |
Employer Contributions |  | 2,040 |
Benefits Paid | (1,183) | (1,080) |
Fair Value of Plan Assets at March 31, | 39,009 | 36,541 | $ 33,412
Funded Status at March 31, | 2,308 | 2,811 |
Other Assets | 2,308 | 2,811 |
Accumulated Other Comprehensive Losses - Net Actuarial Loss | 4,709 | 4,346 |
Accumulated Other Comprehensive Losses - Prior Service Cost |  | 19 |
Accumulated Other Comprehensive Losses | 4,709 | 4,365 |
Tax impact | (1,149) | (1,049) |
Accumulated Other Comprehensive Losses, net of tax | $ 3,560 | $ 3,316 |

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