Employee Benefit Plans - Schedule of Fair Value of Benefit Plan Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Mar. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	$ 1,280,191	$ 1,306,456
Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	18,974	17,163
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	18,974	17,163
International Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	107,551	100,370
International Equity Securities [Member] | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	107,551	100,370
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	10,012	3,190
Equity Securities [Member] | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	10,012	3,190
Equity Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	438,146	417,307
Equity Funds [Member] | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	438,146	417,307
Equity Funds, Foreign [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	30,618	30,977
Equity Funds, Foreign [Member] | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	30,618	30,977
Other Corporate Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	13,025	12,904
Other Corporate Bonds [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	13,025	12,904
US Government Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	336,706	361,070
US Government Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	336,706	361,070
Life Insurance Contract [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	613	626
Life Insurance Contract [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	613	626
Investment [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	955,645	943,607
Investment [Member] | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	605,301	569,007
Investment [Member] | Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	349,731	373,974
Investment [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	613	626
US Equity Commingled Fund [Member] | Investment Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	17,729	2,866
International Equity Commingled Fund [Member] | Investment Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	133,851	161,458
US Fixed Income Commingled Fund [Member] | Investment Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	34,098	44,861
International Fixed income Commingled Fund [Member] | Investment Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	2,070	7,070
Private Equity Funds [Member] | Investment Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	126,351	126,549
Government Securities Commingled Fund [Member] | Investment Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	8,760	14,599
Other Investments [Member] | Investment Measured at NAV [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	60	3,592
Investment Measured At Net Asset Value
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	322,919	360,995
Accounts Receivable [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	2,462	2,288
Accounts Payable [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	$ (835)	$ (434)