Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2012

Compensation and Retirement Disclosure [Abstract]

Components of Net Periodic Benefit Cost

The following table sets forth the net periodic benefit cost for the Company’s defined benefit pension plans and other benefits for the six months endedJune 30:

	Pension Benefits						Other Benefits
	2012			2011			2012			2011
Components of net periodic benefit cost
Service cost	$	5,723		$	5,426		$	—		$	—
Interest cost	15,916			15,744			407			465
Expected return on plan assets	(20,411		)	(20,367		)	—			—
Amortization of prior service cost (benefit)	129			129			(258		)	(258		)
Recognized net actuarial loss	8,394			4,800			243			194
Net periodic pension benefit cost	$	9,751		$	5,732		$	392		$	401

The following table sets forth the net periodic benefit cost for the Company’s defined benefit pension plans and other benefits for the three months ended June 30:

	Pension Benefits						Other Benefits
	2012			2011			2012			2011
Components of net periodic benefit cost
Service cost	$	2,861		$	2,713		$	—		$	—
Interest cost	7,958			7,872			203			232
Expected return on plan assets	(10,206		)	(10,184		)	—			—
Amortization of prior service cost (benefit)	64			64			(129		)	(129		)
Recognized net actuarial loss	4,183			2,394			122			97
Net periodic pension benefit cost	$	4,860		$	2,859		$	196		$	200