Pension and Postretirement Benefits Other Than Pension Plans (Tables)

3 Months Ended

Mar. 31, 2019

Pension Plan [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Net Periodic Pension and Postretirement Benefit (Income) Expense

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

	Three Months Ended
	March 31,
	2019		2018
Interest cost	$	878	$	811
Expected return on plan assets		(944)		(1,102)
Amortization of net actuarial loss		287		255
Total net periodic pension (income) expense	$	221	$	(36)

Postretirement Health Coverage [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Net Periodic Pension and Postretirement Benefit (Income) Expense

Net postretirement benefit income reflected in other gains and (losses), net in the accompanying condensed consolidated statements of operations included the following components for the respective periods (in thousands):

	Three Months Ended
	March 31,
	2019		2018
Interest cost	$	25	$	24
Amortization of net actuarial loss		61		64
Amortization of prior service credit		(328)		(328)
Total net postretirement benefit income	$	(242)	$	(240)