Employee Benefit Plans - Schedule of Fair Value of Benefit Plan Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Mar. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	$ 1,649,239	$ 1,853,962
Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	21,015	42,003
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	21,015	42,003
International Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	135,824	164,298
International Equity Securities [Member] | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	135,824	164,298
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	5,757	7,410
Equity Securities [Member] | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	5,757	7,410
Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	573,015	537,813
Equity Funds [Member] | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	573,015	537,813
Equity Funds, Foreign [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	51,559	42,944
Equity Funds, Foreign [Member] | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	51,559	42,944
Other Corporate Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	10,007	12,231
Other Corporate Bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	10,007	12,231
US Government Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	462,829	103,853
US Government Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	462,829	103,853
Fixed Income Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount		509,760
Fixed Income Funds [Member] | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount		509,760
Life Insurance Contract [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	842	9,813
Life Insurance Contract [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	842	9,813
Investment [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	1,260,848	1,430,125
Investment [Member] | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	787,170	1,304,228
Investment [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	472,836	116,084
Investment [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	842	9,813
US Equity Commingled Fund [Member] | Investment Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	15,554	17,289
International Equity Commingled Fund [Member] | Investment Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	180,138	158,447
US Fixed Income Commingled Fund [Member] | Investment Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	48,537	59,203
International Fixed income Commingled Fund [Member] | Investment Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	7,239	1,599
Private Equity Funds [Member] | Investment Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	120,537	95,880
Government Securities Commingled Fund [Member] | Investment Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	9,604	24,384
Other Investments [Member] | Investment Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	5,483	1,549
Investment Measured At Net Asset Value
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	387,092	358,351
Accounts Receivable [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	1,416	67,378
Accounts Payable [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	$ (117)	$ (1,892)