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Schedule of Reconciliation of Obligations and Fair Values of Plan Assets (Detail) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 2019 | Mar. 31, 2018 | Mar. 31, 2017
Compensation And Retirement Disclosure [Abstract] |  |  |  |
Benefit Obligation at April 1, |  | $ 33,370 | $ 40,589 |
Service Cost - Benefits Earned During the Period |  | 399 | 710 | $ 1,001
Interest Cost on Projected Benefit Obligation |  | 1,347 | 1,466 | 1,584
Actuarial (Gain) Loss |  | (306) | (4,505) |
Settlement | $ (3,900) |  | (3,857) |
Benefits Paid |  | (1,080) | (1,033) |
Benefit Obligation at March 31, | 33,370 | 33,730 | 33,370 | 40,589
Fair Value of Plan Assets at April 1, |  | 33,412 | 26,410 |
Actual Return on Plan Assets |  | 2,169 | 2,805 |
Employer Contributions |  | 2,040 | 9,087 |
Settlement |  |  | (3,857) |
Benefits Paid |  | (1,080) | (1,033) |
Fair Value of Plans at March 31, | 33,412 | 36,541 | 33,412 | $ 26,410
Funded Status at March 31, | 42 | 2,811 | 42 |
Other Assets |  | 2,811 |  |
Prepaid and Other Assets | 538 |  | 538 |
Accrued Benefit Liability | (496) |  | (496) |
Accumulated Other Comprehensive Losses - Net Actuarial Loss | 5,198 | 4,346 | 5,198 |
Accumulated Other Comprehensive Losses - Prior Service Cost | 80 | 19 | 80 |
Accumulated Other Comprehensive Losses | 5,278 | 4,365 | 5,278 |
Reclassification to Retained Earnings | 978 |  | 978 |
Tax impact | (2,244) | (1,049) | (2,244) |
Accumulated Other Comprehensive Losses, net of tax | $ 4,012 | $ 3,316 | $ 4,012 |

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