Pension and Other Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2012

Pension and Other Postretirement Benefits

Components of net periodic benefit cost

 The components of net periodic benefit cost are as follows (in thousands):

	Pension Benefits						Other Postretirement Benefits
	For the three months ended September 30,						For the three months ended September 30,
	2012			2011			2012		2011
Components of net periodic benefit cost:
Service cost	$	1,498		$	1,291		$	2,018	$	1,827
Interest cost		3,129			3,144			7,253		6,206
Expected return on plan assets		(4,031	)		(3,929	)		—		—
Amortization of prior service cost (credit)		64			68			261		(240	)
Amortization of net actuarial loss		2,313			2,063			3,681		1,971
Net periodic benefit cost	$	2,973		$	2,637		$	13,213	$	9,764

	Pension Benefits						Other Postretirement Benefits
	For the nine months ended September 30,						For the nine months ended September 30,
	2012			2011			2012		2011
Components of net periodic benefit cost:
Service cost	$	4,494		$	3,873		$	6,054	$	4,333
Interest cost		9,387			9,432			21,759		18,686
Expected return on plan assets		(12,093	)		(11,787	)		—		—
Amortization of prior service cost (credit)		192			204			783		(720	)
Amortization of net actuarial loss		6,939			6,189			11,043		8,075
Settlement loss		—			1,716			—		—
Net periodic benefit cost	$	8,919		$	9,627		$	39,639	$	30,374