Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2013

Compensation and Retirement Disclosure [Abstract]

Schedule of Net Benefit Costs

Components of the net periodic pension and postretirement benefit cost (credit) for the three months ended March 31, 2013 and 2012 are as follows:

	March 31,
	2013			2012
Service cost	$	213		$	192
Interest cost	1,619			1,750
Expected return on assets	(2,320		)	(2,464		)
Amortization of prior service cost	81			81
Amortization of actuarial loss	485			149
Net periodic pension and postretirement benefit cost (credit)	$	78		$	(292	)