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Stock Repurchase Plan (Additional Information) (Details) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Apr. 26, 2001
Stockholders' Equity Note [Abstract]          
Common stock, authorized shares repurchase         607,754
Common stock, total shares repurchased 334,965   334,965    
Common stock, shares purchased 0 0 0 0