Retirement and Postretirement Benefits Other Than Pension Plans (Tables)

6 Months Ended

Jun. 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 June 30,						Six Months Ended June 30,
	2015			2014			2015			2014
Interest cost	$	986		$	1,045		$	1,972		$	2,089
Expected return on plan assets		(1,188	)		(1,410	)		(2,376	)		(2,819	)
Amortization of net actuarial loss		309			147			617			295
Total net periodic pension (income) expense	$	107		$	(218	)	$	213		$	(435	)

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 June 30,						Six Months Ended June 30,
	2015			2014			2015			2014
Interest cost	$	53		$	54		$	106		$	109
Amortization of net actuarial loss		118			104			236			209
Amortization of prior service credit		(329	)		(328	)		(657	)		(657	)
Total net postretirement benefit income	$	(158	)	$	(170	)	$	(315	)	$	(339	)