Employee Benefit Plans - Schedule of Net Periodic Benefit Costs (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
|
| Compensation Related Costs [Abstract] | |||
| Service costs | $ 13,708 | $ 11,875 | $ 11,479 |
| Interest costs | $ 3,564 | $ 3,298 | $ 3,844 |
| Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] | Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax | Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax | Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax |
| Expected return on plan assets | $ (9,674) | $ (7,671) | $ (6,950) |
| Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax | Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax | Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax |
| Amortization: | |||
| Net prior service cost (credit) recognized | $ (658) | $ 309 | $ (500) |
| Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Amortization of Prior Service Cost (Credit), Statement of Income or Comprehensive Income [Extensible Enumeration] | Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax | Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax | Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax |
| Net actuarial loss (gain) recognized | $ 919 | $ 450 | $ (179) |
| Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Immediate Recognition of Actuarial Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax | Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax | Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax |
| Settlement loss | $ 1,881 | $ 0 | $ 922 |
| Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Settlement Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax | Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax | Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax |
| Total net periodic benefit cost | $ 9,740 | $ 8,261 | $ 8,616 |