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Stock-Based Compensation (Stock Option Activity) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 6 Months Ended 12 Months Ended
Jun. 30, 2013
Dec. 31, 2012
Options, Outstanding [Roll Forward]    
Outstanding, beginning of period 394,322  
Granted 47,000  
Exercised (25,887)  
Canceled/Forfeited (3,833)  
Expired 0  
Outstanding, end of period 411,602 394,322
Exercisable, end of period 342,520  
Options, Outstanding, Weighted Average Exercise Price [Roll Forward]    
Outstanding, weighted average exercise price, beginning of period $ 15.30  
Granted, weighted average exercise price $ 18.75  
Exercised, weighted average exercise price $ 14.23  
Canceled/Forfeited, weighted average exercise price $ 17.01  
Expired, weighted average exercise price $ 0.00  
Outstanding, weighted average exercise price, end of period $ 15.75 $ 15.30
Exercisable, weighted average exercise price, end of period $ 15.32  
Options, Weighted Average Remaining Contractual Term:    
Outstanding, weighted average remaining contractual life (years), beginning of period 5 years 9 months 18 days   
Outstanding, weighted average remaining contractual life (years), end of period 5 years 9 months 18 days   
Exercisable, weighted average remaining contractual life (years), end of period 5 years 1 month 10 days  
Options, Intrinsic Value:    
Outstanding, aggregate intrinsic value, beginning of period     
Exercised, aggregate intrinsic value     
Canceled/Forfeited, aggregate intrinsic value     
Outstanding, aggregate intrinsic value, end of period 3,187   
Exercisable, aggregate intrinsic value, end of period $ 2,800