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Equity Incentive Plans Schedule of Restricted Stock Activity (Details) - Restricted Stock - $ / shares
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Summary of Restricted Stock Activity [Line Items]      
Unvested restricted stock, shares 0 20,000 116,000
Restricted stock vested, shares (20,000) (96,000)  
Unvested restricted stock, weighted average grant date fair value $ 0.00 $ 9.30 $ 9.47
Restricted stock vested, weighted average grant date fair value $ 9.30 $ 9.51