Employee Benefit Plans (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Components of Net Periodic Benefit Cost [Abstract]
Service cost	$ 0	$ 27	$ 0	$ 54
Interest cost	97	101	194	202
Expected return on plan assets	(135)	(131)	(270)	(262)
Recognized net actuarial loss	83	40	166	80
Net periodic benefit cost	$ 45	$ 37	$ 90	$ 74