Pension and Postretirement Benefit Plans (Tables)

3 Months Ended

Sep. 30, 2016

Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]

Schedule of Net Benefit Costs

The following table presents the components of net periodic benefit costs:

Three months ended September 30,	2016			2015
(In thousands)
Pension benefits
Service cost	$	3,137		$	2,977
Interest cost	1,225			1,469
Expected return on plan assets	(2,298		)	(2,746		)
Prior service cost amortization	48			49
Actuarial loss amortization	897			157
Net periodic benefit costs	$	3,009		$	1,906
Postretirement benefits
Service cost	$	23		$	25
Interest cost	80			96
Prior service credit amortization	(98		)	(107		)
Actuarial gain amortization	(78		)	(169		)
Net periodic benefit credit	$	(73	)	$	(155	)