Pension and Other Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2020

Retirement Benefits [Abstract]

Schedule of components of net periodic benefit cost (income)

Components of net periodic benefit cost (income) were as follows: 

	Pension Benefits				Postretirement Benefits
	Three months ended September 30,
(in thousands)	2020		2019		2020		2019
Components of net periodic benefit cost (income)
Service cost	$	2,402	$	2,262	$	150	$	143
Interest cost	2,194		2,644		108		140
Expected return on plan assets	(2,577)		(3,123)		—		—
Settlement expense	1,241		2,122		—		—
Amortization of net loss (gain)	1,356		513		(241)		(359)
Amortization of prior service cost (credit)	70		94		(35)		(35)
Net periodic benefit cost (income)	$	4,686	$	4,512	$	(18)	$	(111)

Components of net periodic benefit cost (income) were as follows: 

	Pension Benefits				Postretirement Benefits
	Nine months ended September 30,
(in thousands)	2020		2019		2020		2019
Components of net periodic benefit cost (income)
Service cost	$	7,180	$	6,384	$	450	$	430
Interest cost	7,244		8,432		324		418
Expected return on plan assets	(8,382)		(9,679)		—		—
Settlement expense	5,091		3,897		—		—
Amortization of net loss (gain)	3,663		914		(725)		(1,077)
Amortization of prior service cost (credit)	209		186		(103)		(103)
Net periodic benefit cost (income)	$	15,005	$	10,134	$	(54)	$	(332)