Components of Net Periodic Benefit Cost (Tables)

6 Months Ended

Jun. 30, 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 and six months ended June 30, 2020 and 2019 includes the following components (in thousands):

	Three months ended June 30,					Six months ended June 30,
	Pension benefits			Other post-retirement benefits		Pension benefits			Other post-retirement benefits
	2020		2019	2020	2019	2020		2019	2020	2019
Service cost	$	—	—	20	20	$	—	—	40	40
Interest cost	250		300	178	209	500		600	356	419
Expected return on plan assets	(737)		(641)	—	—	(1,474)		(1,282)	—	—
Amortization of prior service cost	—		—	—	—	—		—	—	—
Amortization of the net loss (gain)	174		254	(62)	(207)	348		508	(124)	(414)
Net periodic (decrease) increase in benefit cost	$	(313)	(87)	136	22	$	(626)	(174)	272	45