Employee Benefit Plans ESPP (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
ESPP [Abstract]
Stock Issued During Period, Shares, Employee Stock Purchase Plans	352	251	311
Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options	$ 1,225	$ 1,572	$ 2,049
Employee Stock Ownership Plan (ESOP), Weighted Average Purchase Price of Shares Purchased	$ 3.48	$ 6.27	$ 6.6