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Employee Retirement Plans (Periodic Service Costs) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2022
Change in benefit obligation:      
Projected benefit obligation at beginning of period $ 3,646 $ 51,507  
Interest cost 152 423 $ 1,107
Actuarial gain (47) (2,044)  
Benefits paid (370) (46,240)  
Projected benefit obligations at end of year 3,381 3,646 51,507
Change in plan assets:      
Fair value of plan assets at beginning of period 18 48,708  
Actual return on plan assets 0 (2,820)  
Employer contribution 370 370  
Benefits paid (370) (1,371)  
Settlements paid with termination of qualified plan (18) (44,869)  
Fair value of plan assets at end of year 0 18 $ 48,708
Funded status at end of year $ (3,381) $ (3,628)  
Defined Benefit Plan Net Periodic Benefit Cost Credit Expected Return Loss Statement Of Income Or Comprehensive Income Extensible List Not Disclosed Flag Actuarial gain Actuarial gain Actuarial gain
Defined Benefit Plan Net Periodic Benefit Cost Credit Interest Cost Statement Of Income Or Comprehensive Income Extensible List Not Disclosed Flag Interest cost Interest cost Interest cost