Pension Plan and Postretirement Benefits Other Than Pension (Tables)

6 Months Ended

Jun. 30, 2019

Pension Plan and Postretirement Benefits Other Than Pension

Schedule of components of net periodic pension and other postretirement costs

The components of net periodic pension and other postretirement costs related to these plans were as follows:

				Other						Other
	Pension Benefits			Postretirement Benefits			Pension Benefits			Postretirement Benefits
	Three months ended June 30,				Three months ended June 30,		Six months ended June 30,				Six months ended June 30,
	2019		2018		2019	2018	2019		2018		2019	2018
		(in thousands)						(in thousands)
Components of net periodic benefit cost:
Interest cost	$	1,545	1,485	$	8	13	$	3,073	2,993	$	16	27
Expected return on plan assets		(1,567)	(2,062)		—	—		(3,157)	(4,131)		—	—
Actuarial gain amortization		—	—		(123)	(30)		—	—		(247)	(60)
Prior service credit amortization		—	—		—	—		—	—		—	(1)
Total	$	(22)	(577)	$	(115)	(17)	$	(84)	(1,138)	$	(231)	(34)