Retirement Plans and Other Post-Retirement Benefits

3 Months Ended

Mar. 31, 2021

Compensation And Retirement Disclosure [Abstract]

Retirement Plans and Other Post-Retirement Benefits

10. RETIREMENT PLANS AND OTHER POST-RETIREMENT BENEFITS

The following tables provide information with respect to the net periodic costs of our pension and post-retirement medical benefit plans included in continuing operations.

	Three months ended March 31
In thousands	2021			2020
Pension Benefits
Service cost	$	—		$	44
Interest cost		250			301
Amortization of prior service cost		12			12
Amortization of actuarial loss		199			160
Total net periodic benefit expense	$	461		$	517
Other Benefits
Service cost	$	7		$	7
Interest cost		32			46
Amortization of prior service credit		(58	)		(116	)
Amortization of actuarial loss (gain)		12			(209	)
Total net periodic benefit income	$	(7	)	$	(272	)