Accounting Pronouncements (Narratives) (Details) $ in Thousands	6 Months Ended
	Sep. 30, 2020 USD ($)
Allowance For Credit Loss [Abstract]
Allowance For Doubtful Accounts Provision For Credit Losses	$ 2,880
Cumulative Effect Period Of Adoption Adjustment [Member] | Debt securities, estimated credit loss
Allowance For Credit Loss [Abstract]
Allowance For Doubtful Accounts Provision For Credit Losses	$ 2,900