Pension and Postretirement Benefits Other Than Pension Plans (Tables)

6 Months Ended

Jun. 30, 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				Six Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
Interest cost	$	878	$	803	$	1,756	$	1,614
Expected return on plan assets		(943)		(1,070)		(1,887)		(2,172)
Amortization of net actuarial loss		286		264		573		519
Total net periodic pension (income) expense	$	221	$	(3)	$	442	$	(39)

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				Six Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
Interest cost	$	25	$	24	$	50	$	48
Amortization of net actuarial loss		62		65		123		129
Amortization of prior service credit		(329)		(329)		(657)		(657)
Total net postretirement benefit income	$	(242)	$	(240)	$	(484)	$	(480)