Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 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 June 30, 2013 and 2012 are as follows:

	June 30,
	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	)
Contributions paid	$	—		$	—

Components of the net periodic pension and postretirement benefit cost (credit) for the six months ended June 30, 2013 and 2012 are as follows:

	June 30,
	2013			2012
Service cost	$	426		$	384
Interest cost	3,238			3,500
Expected return on assets	(4,640		)	(4,928		)
Amortization of prior service cost	162			162
Amortization of actuarial loss	970			298
Net periodic pension and postretirement benefit cost (credit)	$	156		$	(584	)
Contributions paid	$	—		$	—