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Stock Based Compensation, Stock Options Outstanding By Exercise Price Range (Details) - Jun. 30, 2015 - $ / shares
Total
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Outstanding stock options, number (in shares) 83,861
Outstanding stock option, weighted average exercise price (in dollars per share) $ 12.39
Outstanding stock option, weighted average remaining contractual life 4 years 1 month 27 days
Exercisable stock options, number (in shares) 75,072
Exercisable stock option, weighted average exercise price (in dollars per shares) $ 12.40
Exercisable stock options, weighted average remaining contractual life 3 years 11 months 1 day
Exercise Price Range, 9.00 to 10.99 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise price range, lower range limit $ 9.00
Exercise price range, upper range limit $ 10.99
Outstanding stock options, number (in shares) 17,633
Outstanding stock option, weighted average exercise price (in dollars per share) $ 9.00
Outstanding stock option, weighted average remaining contractual life 3 years 6 months 29 days
Exercisable stock options, number (in shares) 17,633
Exercisable stock option, weighted average exercise price (in dollars per shares) $ 9.00
Exercisable stock options, weighted average remaining contractual life 3 years 6 months 29 days
Exercise Price Range 11.00 to 12.99 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise price range, lower range limit $ 11.00
Exercise price range, upper range limit $ 12.99
Outstanding stock options, number (in shares) 53,266
Outstanding stock option, weighted average exercise price (in dollars per share) $ 12.04
Outstanding stock option, weighted average remaining contractual life 5 years 1 month 3 days
Exercisable stock options, number (in shares) 44,477
Exercisable stock option, weighted average exercise price (in dollars per shares) $ 12.00
Exercisable stock options, weighted average remaining contractual life 4 years 10 months 15 days
Exercise Price Range 17.00 to 18.99 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Exercise price range, lower range limit $ 17.00
Exercise price range, upper range limit $ 18.99
Outstanding stock options, number (in shares) 12,962
Outstanding stock option, weighted average exercise price (in dollars per share) $ 18.41
Outstanding stock option, weighted average remaining contractual life 1 year 1 month 7 days
Exercisable stock options, number (in shares) 12,962
Exercisable stock option, weighted average exercise price (in dollars per shares) $ 18.41
Exercisable stock options, weighted average remaining contractual life 1 year 1 month 7 days