Retirement Plans and Other Post-Retirement Benefits

6 Months Ended

Jun. 30, 2011

Retirement Plans and Other Post-Retirement Benefits [Abstract]

RETIREMENT PLANS AND OTHER POST-RETIREMENT BENEFITS

8. RETIREMENT PLANS AND OTHER POST-RETIREMENT BENEFITS

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

	Three months ended
	June 30
In thousands	2011			2010
Pension Benefits
Service cost	$	2,338		$	2,270
Interest cost		6,033			6,045
Expected return on plan assets		(10,449	)		(10,083	)
Amortization of prior service cost		637			614
Amortization of unrecognized loss		3,082			3,505
Net periodic benefit cost	$	1,641		$	2,351
Other Benefits
Service cost	$	693		$	698
Interest cost		691			805
Expected return on plan assets		(130	)		(134	)
Amortization of prior service cost		(306	)		(306	)
Amortization of unrecognized loss		183			316
Net periodic benefit cost	$	1,131		$	1,379

	Six months ended
	June 30
In thousands	2011			2010
Pension Benefits
Service cost	$	4,943		$	4,692
Interest cost		12,097			12,053
Expected return on plan assets		(20,914	)		(20,143	)
Amortization of prior service cost		1,283			1,231
Amortization of unrecognized loss		6,626			6,904
Net periodic benefit cost	$	4,035		$	4,737
Other Benefits
Service cost	$	1,453		$	1,459
Interest cost		1,408			1,685
Expected return on plan assets		(260	)		(269	)
Amortization of prior service cost		(611	)		(612	)
Amortization of unrecognized loss		441			769
Net periodic benefit cost	$	2,431		$	3,032

In millions	June 30, 2011		Dec. 31, 2010
Pension Plan Assets
Fair value of plan assets at end of period	$	541.0	$	526.4