Derivatives (Narratives) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Mar. 31, 2020
Interest Rate Derivatives [Abstract]
Total notional amount of Company's variable interest rate swaps on debt	$ 235,000		$ 235,000	$ 235,000
Notional amount of operating lease	500		500
Reclassify net losses on interest rate contracts from AOCI to earnings over the next twelve months			$ 3,800
Amounts reclassified from AOCI to interest expense	$ (961)	$ 366