Pension and Other Postretirement Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2012

Components Of Net Periodic Cost

The components of net periodic cost are as follows:

	Three Months Ended June 30,												Six Months Ended June 30,
(in thousands)	Pension Benefits						Other Postretirement Benefits						Pension Benefits						Other Postretirement Benefits
	2012			2011			2012			2011			2012			2011			2012			2011
Service cost	$	3,495		$	2,925		$	29		$	(58	)	$	6,990		$	5,901		$	58		$	57
Interest cost		9,334			9,984			127			(318	)		18,668			19,111			254			285
Expected return on plan assets		(12,830	)		(13,365	)		—			—			(25,660	)		(25,172	)		—			—
Amortization of prior service cost		100			107			(59	)		52			200			209			(118	)		(50	)
Amortization of net loss (gain)		4,816			1,391			(21	)		125			9,623			3,369			(42	)		(118	)
Net periodic cost	$	4,915		$	1,042		$	76		$	(199	)	$	9,821		$	3,418		$	152		$	174