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Employee Benefit Plans (Components of Postretirement Benefit Liabilities) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]      
Beginning of year $ 28,326 $ 28,770  
Service cost for benefits earned during the period 982 1,188 $ 1,326
Interest cost on accumulated post retirement benefit 1,499 1,469 1,148
Net benefit payments and expense (1,327) (1,240)  
Actuarial (gain) (496) (1,861)  
Prior service credit (1,579)    
Accumulated postretirement benefit obligation 27,405 28,326 $ 28,770
Liabilities:      
Current liabilities 1,790 1,741  
Non-currrent liabilities 25,614 26,585  
Total post retirement benefit liability recognized in statement of financial position 27,404 28,326  
Components included in accumulated other comprehensive income (loss):      
Unrecognized net loss 3,449 1,385  
Cumulative net periodic benefit cost (in excess of employer contribution) $ 30,853 $ 29,711