Components of Net Periodic Benefit Cost (Tables)

3 Months Ended

Mar. 31, 2020

Retirement Benefits [Abstract]

Net Periodic Benefit Cost (Increase)

Net periodic (decrease) increase in benefit cost for pension benefits and other post-retirement benefits for the three months ended March 31, 2020 and 2019 includes the following components (in thousands):

	Three months ended March 31,
	Pension benefits			Other post-retirement benefits
	2020		2019	2020	2019
Service cost	$	—	—	20	20
Interest cost	250		300	178	210
Expected return on plan assets	(737)		(641)	—	—
Amortization of prior service cost	—		—	—	—
Amortization of the net loss (gain)	174		254	(62)	(207)
Net periodic (decrease) increase in benefit cost	$	(313)	(87)	136	23