Retirement Plans and Other Post-Retirement Benefits (Tables)

3 Months Ended

Mar. 31, 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 March 31
In thousands	2020			2019
Pension Benefits
Service cost	$	44		$	484
Interest cost		301			3,450
Expected return on plan assets		—			(3,696	)
Amortization of prior service cost		12			34
Amortization of unrecognized loss		160			775
Total net periodic benefit cost	$	517		$	1,047
Other Benefits
Service cost	$	7		$	9
Interest cost		46			84
Amortization of prior service credit		(116	)		(2	)
Amortization of actuarial gain		(209	)		(173	)
Total net periodic benefit credit	$	(272	)	$	(82	)