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Equity-Based Compensation Plans (Details 1) (USD $)
6 Months Ended
Jun. 30, 2012
Equity-Based Compensation Plans Details 1  
Nonvested at December 31, 2011 7,259
Granted during the period 9,559
Vested during the period   
Forfeited or expired during the period (2,474)
Nonvested at June 30, 2012 14,344
Nonvested at December 31, 2011 $ 14.54
Granted during the period $ 10.96
Vested during the period   
Forfeited or expired during the period $ 12.55
Nonvested at June 30, 2012 $ 12.50