Employee Benefit Plans ESPP (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
ESPP [Abstract]
Shares issued pursuant to the ESPP	381	352	251
Cash received for the purchase of shares pursuant to the ESPP	$ 767	$ 1,225	$ 1,572
Weighted average purchase price per share	$ 2.01	$ 3.48	$ 6.27