Derivatives (Table Text Block)	3 Months Ended
	Jun. 30, 2023
Derivative Instrument Detail [Abstract]
Derivatives	June 30, 2023   March 31, 2023     (Unaudited)         (In thousands) Interest rate swaps designated as cash flow hedges:         Assets $ 9,254 $ 5,311 Liabilities   –   – Notional amount  204,227   206,347
Derivative Fair Values Located in Accounts Payable and Accrued Expenses in the Balance Sheet	The Effect of Interest Rate Contracts on the Statements of Operations for the Quarters Ended         June 30, 2023   June 30, 2022     (Unaudited)     (In thousands) Gain recognized in AOCI on interest rate contracts $ (3,943) $ (736) (Gain) loss reclassified from AOCI into income$( 1,150 )$ 566
Effect of Interest Rate Contracts on the Statement of Operations	Derivatives Fair Values as of         June 30, 2023   March 31, 2023     (Unaudited)         (In thousands) Equity market contracts as economic hedging instruments         Assets $ 7,539 $ 4,295 Liabilities $ – $ – Notional amount$ 362,436 $ 465,701