Employee Benefit Plans (Components of net periodic benefit costs post retirement benefits) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Postemployment Benefits [Abstract]
Service cost for benefits earned during the period	$ 332	$ 350
Other components of net periodic benefit costs:
Interest cost on accumulated postretirement benefit	287	227
Other components	17	53
Total other components of net periodic benefit costs	304	280
Net periodic postretirement benefit cost	$ 636	$ 630