Retirement Plans and Other Post-Retirement Benefits

3 Months Ended

Mar. 31, 2019

Compensation And Retirement Disclosure [Abstract]

Retirement Plans and Other Post-Retirement Benefits

11. 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	2019			2018
Pension Benefits
Service cost	$	484		$	594
Interest cost		3,450			3,241
Expected return on plan assets		(3,696	)		(5,531	)
Amortization of prior service    cost		34			5
Amortization of unrecognized    loss		775			2,060
Total net periodic benefit cost	$	1,047		$	369
Other Benefits
Service cost	$	9		$	15
Interest cost		84			80
Amortization of prior    service credit		(2	)		—
Amortization of    actuarial gain		(173	)		(16	)
Total net periodic    benefit cost	$	(82	)	$	79

In April 2019, we informed participants our qualified pension plan benefits would be frozen as of May 31, 2019 and the plan would be terminated June 30, 2019.  We intend to replace this benefit for active employees with an enhanced defined contribution plan.