Employee Benefit Plans (Table Text Block)	3 Months Ended	9 Months Ended
	Dec. 31, 2022	Dec. 31, 2022
Compensation and Retirement Disclosure [Abstract]
Components of Net Periodic Post Retirement Benefit Cost	The components of the net periodic benefit costs with respect to postretirement benefits were as follows:     Quarter Ended December 31,     2022   2021     (Unaudited)     (In thousands)           Service cost for benefits earned during the period $ 332 $   350 Other components of net periodic benefit costs:         Interest cost on accumulated postretirement benefit   287   227 Other components   17   53 Total other components of net periodic benefit costs   304   280 Net periodic postretirement benefit cost$ 636 $  630	Nine Months Ended December 31,     2022   2021     (Unaudited)     (In thousands)           Service cost for benefits earned during the period $ 995 $   1,051 Other components of net periodic benefit costs:         Interest cost on accumulated postretirement benefit   861   681 Other components   51   159 Total other components of net periodic benefit costs   912   840 Net periodic postretirement benefit cost$ 1,907 $  1,891