Pension and Postretirement Benefits Other Than Pension Plans (Tables)

3 Months Ended

Mar. 31, 2018

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
	March 31,
	2018			2017
Interest cost	$	811		$	914
Expected return on plan assets		(1,102	)		(1,036	)
Amortization of net actuarial loss		255			282
Total net periodic pension (income) expense	$	(36	)	$	160

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
	March 31,
	2018			2017
Interest cost	$	24		$	26
Amortization of net actuarial loss		64			57
Amortization of prior service credit		(328	)		(328	)
Total net postretirement benefit income	$	(240	)	$	(245	)