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Stock-Based Compensation (Stock Option Activity) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2015
Dec. 31, 2014
Number of Stock Options:    
Outstanding, beginning of period (in shares) 432,269  
Granted (in shares) 50,000  
Exercised (in shares) (53,500)  
Canceled/Forfeited (in shares) (1,500)  
Outstanding, end of period (in shares) 427,269 432,269
Exercisable (in shares) 322,099  
Weighted Average Exercise Price:    
Outstanding, weighted average exercise price, beginning of period (in USD per share) $ 17.55  
Granted, weighted average exercise price (in USD per share) 22.90  
Exercised, weighted average exercise price (in USD per share) 10.28  
Canceled/Forfeited, weighted average exercise price (in USD per share) 30.41  
Outstanding, weighted average exercise price, end of period (in USD per share) 19.04 $ 17.55
Exercisable, weighted average exercise price (in USD per share) $ 17.05  
Options, Weighted Average Remaining Contractual Term:    
Outstanding, weighted average remaining contractual life 5 years 5 months 33 days 10 years 1 month 6 days
Exercisable, weighted average remaining contractual life 4 years 3 months 29 days  
Options, Intrinsic Value:    
Outstanding, aggregate intrinsic value $ 2,033 $ 2,786
Exercisable, aggregate intrinsic value $ 1,978