Employee Benefit Plan (Tables)

6 Months Ended

Jun. 30, 2013

Compensation and Retirement Disclosure [Abstract]

Summary of Components of Net Periodic Pension Cost (Benefit)

A summary of the components of net periodic pension cost is as follows:

	Three Months Ended   June 30,						Six Months Ended   June 30,
	2013			2012			2013			2012
Service cost (benefit)	$	(34	)	$	(615	)	$	224		$	425
Interest cost (benefit)	142			(491		)	312			390
Expected return on assets	(272		)	1,382			(718		)	(1,225		)
Amortization of prior service costs (benefit)	—			(220		)	—			218
Amortization of loss	101			—			198			—
Settlement charges	394			963			394			963
Net periodic pension cost	$	331		$	1,019		$	410		$	771

Schedule of Assumptions Used

The following table includes the assumptions used to develop net periodic pension cost and benefit obligations:

	June 30, 2013	December 31, 2012	June 30 2012	December 31, 2011
Discount rate	4.03%	3.27%	3.35%	4.19%
Expected long term rate on plan assets	0.00%	4.75%	4.75%	5.00%
Rate of compensation increase	—%	—%	3.75%	3.75%