Retirement and Postretirement Benefits Other Than Pension Plans (Tables)

9 Months Ended

Sep. 30, 2015

Pension Plan [Member]

Net Periodic Pension and Postretirement Benefit (Income) Expense

Net periodic pension (income) expense reflected in the accompanying condensed consolidated statements of operations included the following components for the respective periods (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2015			2014			2015			2014
Interest cost	$	1,005		$	1,053		$	2,977		$	3,142
Expected return on plan assets		(1,142	)		(1,379	)		(3,518	)		(4,198	)
Amortization of net actuarial loss		258			180			875			475
Net settlement loss		1,593			—			1,593			—
Total net periodic pension (income) expense	$	1,714		$	(146	)	$	1,927		$	(581	)

Other Postretirement Benefit Plan [Member]

Net Periodic Pension and Postretirement Benefit (Income) Expense

Net postretirement benefit income reflected in the accompanying condensed consolidated statements of operations included the following components for the respective periods (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2015			2014			2015			2014
Interest cost	$	53		$	56		$	159		$	165
Amortization of net actuarial loss		118			125			354			334
Amortization of prior service credit		(329	)		(328	)		(986	)		(985	)
Total net postretirement benefit income	$	(158	)	$	(147	)	$	(473	)	$	(486	)