Derivatives (Equity Market Contracts Designated As Hedging Instruments (Details) - Equity Swap [Member] - USD ($) $ in Thousands	Sep. 30, 2023	Mar. 31, 2023
Notional Amount Of Derivatives [Abstract]
Derivative Asset Notional Amount	$ 10,526	$ 4,295
Derivative Notional Amount	$ 509,519	$ 465,701