Employee Benefit Plans (Table Text Block)

3 Months Ended

6 Months Ended

Sep. 30, 2016

Sep. 30, 2016

Disclosure Text Block Supplement [Abstract]

Net period benefit and postretirement costs

		Quarter Ended September 30,
		2016		2015
		(Unaudited)
		(In thousands)
Service cost for benefits earned during the period	$	257	$	240
Interest cost on accumulated postretirement benefit		203		188
Other components		22		9
Net periodic postretirement benefit cost	$	482	$	437

		Six Months Ended September 30,
		2016		2015
		(Unaudited)
		(In thousands)
Service cost for benefits earned during the period	$	513	$	480
Interest cost on accumulated postretirement benefit		407		376
Other components		44		18
Net periodic postretirement benefit cost	$	964	$	874