Retirement Plans and Other Post-Retirement Benefits (Tables)

6 Months Ended

Jun. 30, 2014

Compensation And Retirement Disclosure [Abstract]

Schedule of Net Periodic Costs of Pension and Post Retirement Medical Benefit Plans

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

	Three months ended June 30
In thousands	2014			2013
Pension Benefits
Service cost	$	2,504		$	2,585
Interest cost		6,309			5,480
Expected return on plan assets		(10,931	)		(10,810	)
Amortization of prior service cost		921			774
Amortization of unrecognized loss		3,014			5,185
Net periodic benefit cost	$	1,817		$	3,214
Other Benefits
Service cost	$	615		$	789
Interest cost		598			545
Amortization of prior service cost		(72	)		(125	)
Amortization of unrecognized loss		129			202
Net periodic benefit cost	$	1,270		$	1,411
	Six months ended June 30
In thousands	2014			2013
Pension Benefits
Service cost	$	5,208		$	5,796
Interest cost		12,480			11,000
Expected return on plan assets		(21,938	)		(21,713	)
Amortization of prior service cost		1,655			1,548
Amortization of unrecognized loss		5,954			10,474
Net periodic benefit cost	$	3,359		$	7,105
Other Benefits
Service cost	$	1,230		$	1,578
Interest cost		1,196			1,090
Amortization of prior service cost		(144	)		(250	)
Amortization of unrecognized loss		258			404
Net periodic benefit cost	$	2,540		$	2,822