Employee Benefit Plans (Table Text Block)

6 Months Ended

Sep. 30, 2017

Disclosure Text Block Supplement [Abstract]

Net period benefit and postretirement costs

		Quarter Ended September 30,
		2017		2016
		(Unaudited)
		(In thousands)
Service cost for benefits earned during the period	$	268	$	257
Interest cost on accumulated postretirement benefit		217		203
Other components		15		22
Net periodic postretirement benefit cost	$	500	$	482
		Six Months Ended September 30,
		2017		2016
		(Unaudited)
		(In thousands)
Service cost for benefits earned during the period	$	536	$	513
Interest cost on accumulated postretirement benefit		434		407
Other components		30		44
Net periodic postretirement benefit cost	$	1,000	$	964