Derivatives (Narratives) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax	$ (429)	$ (6,301)	$ 451
Notional amount of operating lease	3,600
Reclassify net losses on interest rate contracts from AOCI to earnings over the next twelve months	3,900
Derivative hedge market value	6,600	5,900
Derivative Notional Amount	$ 282,700	$ 246,800