Employee Benefit Plans (Components of net periodic benefit costs post retirement benefits) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Postemployment Benefits [Abstract]
Service cost for benefits earned during the period	$ 350	$ 317	$ 1,051	$ 950
Other components of net periodic benefit costs:
Interest cost on accumulated postretirement benefit	227	230	681	689
Other components	53	17	159	51
Total other components of net periodic benefit costs	280	247	840	740
Net periodic postretirement benefit cost	$ 630	$ 564	$ 1,891	$ 1,690