Benefit Plans (Tables)

9 Months Ended

Sep. 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 nine months endedSeptember 30:

	Pension Benefits						Other Benefits
	2012			2011			2012			2011
Components of net periodic benefit cost
Service cost	$	8,585		$	8,139		$	—		$	—
Interest cost	23,873			23,617			611			698
Expected return on plan assets	(30,616		)	(30,550		)	—			—
Amortization of prior service cost (benefit)	194			194			(388		)	(388		)
Recognized net actuarial loss	12,601			7,149			366			292
Net periodic pension benefit cost	$	14,637		$	8,549		$	589		$	602

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 September 30:

	Pension Benefits						Other Benefits
	2012			2011			2012			2011
Components of net periodic benefit cost
Service cost	$	2,862		$	2,713		$	—		$	—
Interest cost	7,957			7,873			204			233
Expected return on plan assets	(10,205		)	(10,183		)	—			—
Amortization of prior service cost (benefit)	65			65			(130		)	(130		)
Recognized net actuarial loss	4,207			2,349			123			98
Net periodic pension benefit cost	$	4,886		$	2,817		$	197		$	201