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Earnings per Share (Basic and Diluted) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Numerator:        
Net income $ 3,385 $ 3,844 $ 6,241 $ 7,838
Denominator for basic net income per common share:        
Weighted average common shares outstanding (in shares) 12,436 12,316 12,405 12,299
Denominator for diluted net income per share:        
Weighted average common shares outstanding (in shares) 12,436 12,316 12,405 12,299
Dilutive effect of stock options and restricted stock (in shares) 316 202 317 148
Diluted weighted average shares (in shares) 12,752 12,518 12,722 12,447
Earnings per common share:        
Basic (in USD per share) $ 0.27 $ 0.31 $ 0.50 $ 0.64
Diluted (in USD per share) $ 0.27 $ 0.31 $ 0.49 $ 0.63