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Stockholders' Equity and Regulatory Matters - Discussion of Warrants (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended 1 Months Ended 0 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Jun. 30, 2012
Series A Preferred Stock
Jun. 30, 2012
Series B Preferred Stock
Aug. 08, 2012
Common Stock
Class of Warrant or Right [Line Items]            
Number of securities called by warrants or rights           521,266
Stock redeemed       $ 67,000 $ 55,000  
Payments for purchase of warrants $ 0 $ 2,189 $ 0     $ 2,200
Potential repurchase           337,480