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Stock-Based Compensation (Details 3) (USD $)
6 Months Ended
Jun. 30, 2013
Shares Restricted stock outstanding, January 1, 2013 (in shares) 143,026
Shares Granted (in shares) 0
Shares Vested (in shares) (41,798)
Shares Cancelled or expired (in shares) 0
Shares Restricted stock outstanding, June 30, 2013 (in shares) 101,228
Weighted Average Grant Date Fair Value per Award Restricted stock outstanding, January 1, 2013 (in dollars per share) $ 13.82
Weighted Average Grant Date Fair Value per Award Granted (in dollars per share) $ 0
Weighted Average Grant Date Fair Value per Award Vested (in dollars per share) $ 14.40
Weighted Average Grant Date Fair Value per Award Cancelled or expired (in dollars per share) $ 0
Weighted Average Grant Date Fair Value per Award Restricted stock outstanding, June 30, 2013 (in dollars per share) $ 13.58
Aggregate Intrinsic Value Restricted stock outstanding, June 30, 2013 $ 338,102