Pension and Other Postretirement Benefits (Tables)

6 Months Ended

Jun. 30, 2011

Pension and Other Postretirement Benefits

Components of net periodic benefit cost

		Pension Benefits						Other Benefits
		For the three months ended June 30,						For the three months ended June 30,
		2011			2010			2011			2010
Components of net periodic benefit cost:
Service cost		$	1,291		$	1,105		$	1,253		$	753
Interest cost			3,144			3,226			6,278			6,502
Expected return on plan assets			(3,929	)		(3,269	)		—			—
Amortization of prior service cost (credit)			68			76			(240	)		(524	)
Amortization of net actuarial loss			2,063			2,231			3,052			3,630
	Net periodic benefit cost	$	2,637		$	3,369		$	10,343		$	10,361

		Pension Benefits						Other Benefits
		For the six months ended June 30,						For the six months ended June 30,
		2011			2010			2011			2010
Components of net periodic benefit cost:
Service cost		$	2,582		$	2,210		$	2,506		$	1,507
Interest cost			6,288			6,452			12,480			13,011
Expected return on plan assets			(7,858	)		(6,538	)		—			—
Amortization of prior service cost (credit)			136			152			(480	)		(1,048	)
Amortization of net actuarial loss			4,126			4,461			6,104			7,260
Settlement loss			1,716			—			—			—
	Net periodic benefit cost	$	6,990		$	6,737		$	20,610		$	20,730