Retirement Plans and Other Post-Retirement Benefits (Tables)

9 Months Ended

Sep. 30, 2020

Compensation And Retirement Disclosure [Abstract]

Schedule of Net Periodic Costs of Pension and Post Retirement Medical Benefit Plans Included in Continuing Operations

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 September 30
In thousands	2020			2019
Pension Benefits
Service cost	$	61		$	216
Interest cost		318			3,287
Expected return on plan assets		—			(3,895	)
Amortization of prior service cost		12			64
Amortization of unrecognized loss		164			819
Total net periodic benefit cost	$	555		$	491
Other Benefits
Service cost	$	8		$	7
Interest cost		46			67
Amortization of prior service credit		(115	)		(2	)
Amortization of actuarial gain		(209	)		(293	)
Total net periodic benefit credit	$	(270	)	$	(221	)

	Nine months ended September 30
In thousands	2020			2019
Pension Benefits
Service cost	$	153		$	1,073
Interest cost		919			10,074
Expected return on plan assets		—			(11,290	)
Amortization of prior service cost		35			152
Amortization of unrecognized loss		485			2,383
Total net periodic benefit cost	$	1,592		$	2,392
Other Benefits
Service cost	$	22		$	25
Interest cost		138			235
Amortization of prior service credit		(347	)		(7	)
Amortization of actuarial gain		(626	)		(639	)
Total net periodic benefit credit	$	(813	)	$	(386	)