Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2011

Benefit Plans [Abstract]

Components of net periodic benefit cost

PENSION BENEFITS	Three Months Ended						Nine Months Ended
	September 30						September 30
in thousands	2011			2010			2011			2010
Components of Net Periodic Benefit Cost
Service cost		$5,190			$4,805			$15,571			$14,413
Interest cost		10,595			10,405			31,787			31,216
Expected return on plan assets		(12,370	)		(12,530	)		(37,110	)		(37,591	)
Amortization of prior service cost		85			115			255			345
Amortization of actuarial loss		2,918			1,438			8,753			4,314
Net periodic pension benefit cost		$6,418			$4,233			$19,256			$12,697
Pretax reclassification from OCI included in net periodic pension benefit cost		$3,003			$1,553			$9,008			$4,659

OTHER POSTRETIREMENT BENEFITS	Three Months Ended						Nine Months Ended
	September 30						September 30
in thousands	2011			2010			2011			2010
Components of Net Periodic Benefit Cost
Service cost		$1,197			$1,066			$3,592			$3,199
Interest cost		1,613			1,663			4,838			4,988
Amortization of prior service credit		(169	)		(183	)		(506	)		(547	)
Amortization of actuarial loss		288			222			862			666
Net periodic postretirement benefit cost		$2,929			$2,768			$8,786			$8,306
Pretax reclassification from OCI included in net periodic postretirement benefit cost		$119			$39			$356			$119