Benefit Plans (Amortize pre-tax amount AOCI) (Details) $ in Thousands |
12 Months Ended |
|---|---|
|
Mar. 31, 2020
USD ($)
| |
| Defined Benefit Plan Disclosure [Line Items] | |
| Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax | $ 14,405 |
| Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax | 7,463 |
| Other Pension Plans, Defined Benefit [Member] | |
| Defined Benefit Plan Disclosure [Line Items] | |
| Defined Benefit Plan, Amortization of Prior Service Cost (Credit) | $ (3,263) |