Employee Benefit Plans (Table Text Block)

3 Months Ended

9 Months Ended

Dec. 31, 2016

Dec. 31, 2016

Disclosure Text Block Supplement [Abstract]

Net period benefit and postretirement costs

		Quarter Ended December 31,
		2016		2015
		(Unaudited)
		(In thousands)
Service cost for benefits earned during the period	$	256	$	240
Interest cost on accumulated postretirement benefit		204		188
Other components		22		9
Net periodic postretirement benefit cost	$	482	$	437

		Nine Months Ended December 31,
		2016		2015
		(Unaudited)
		(In thousands)
Service cost for benefits earned during the period	$	769	$	720
Interest cost on accumulated postretirement benefit		611		564
Other components		66		27
Net periodic postretirement benefit cost	$	1,446	$	1,311