Benefit Plans (Tables)

3 Months Ended

Mar. 31, 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 three months ended March 31:

	Pension Benefits						Other Benefits
	2012			2011			2012			2011
Components of net periodic benefit cost
Service cost	$	2,862		$	2,713		$	—		$	—
Interest cost	7,958			7,872			204			233
Expected return on plan assets	(10,205		)	(10,183		)	—			—
Amortization of prior service cost	65			65			(129		)	(129		)
Recognized net actuarial loss	4,211			2,406			121			97
Net periodic pension benefit cost	$	4,891		$	2,873		$	196		$	201