Employee Benefit Plan (Tables)

9 Months Ended

Sep. 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   September 30,					Nine Months Ended   September 30,
	2013		2012			2013			2012
Service cost	$	—	$	230		$	224		$	655
Interest cost	172		164			484			554
Expected return on assets	138		(553		)	(580		)	(1,778		)
Amortization of prior service costs	—		110			—			328
Amortization of loss	50		5			248			5
Settlement charges	212		147			606			1,110
Net periodic pension cost	$	572	$	103		$	982		$	874

Schedule of Assumptions Used

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

	September 30, 2013	December 31, 2012	September 30 2012	December 31, 2011
Discount rate	4.15%	3.27%	3.19%	4.19%
Expected long term rate on plan assets	—%	4.75%	4.75%	5.00%
Rate of compensation increase	N/A	N/A	3.75%	3.75%