Components of Periodic Benefit Costs (Tables)

3 Months Ended

Dec. 31, 2017

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs

Net periodic benefit cost (income) for pension benefits and other benefits for the three months ended December 31, 2017 and 2016 includes the following components:

	Pension						RIM				Post-retirement
	December 31, 2017			December 31, 2016			December 31, 2017		December 31, 2016		December 31, 2017			December 31, 2016
	(In thousands)
Service cost	$	1,780		$	1,905		$	61	$	59	$	93		$	118
Interest cost	2,129			2,111			111		107		205			186
Expected return on plan assets	(4,815		)	(6,202		)	—		—		—			—
Amortization:
Prior service cost	—			—			—		—		(34		)	(34		)
Net loss	707			2,750			103		113		69			81
Net periodic cost (income)	$	(199	)	$	564		$	275	$	279	$	333		$	351