Annual report pursuant to Section 13 and 15(d)

Stock Options, Stock Grants and New Stock (Stock Options by Exercise Price Range) (Details)

v3.3.1.900
Stock Options, Stock Grants and New Stock (Stock Options by Exercise Price Range) (Details)
 12 Months Ended
Dec. 31, 2015
$ / shares
shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Number of Outstanding options (shares) | shares 173,985
Number of exercisable options (shares) | shares 88,025
$11.55 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Range of Exercise Prices (dollars per share) $ 11.55
Number of Outstanding options (shares) | shares 82,342
Weighted average exercise price (dollars per share) $ 11.55
Weighted average remaining contractual life in years (years) 5 years 23 days
Number of exercisable options (shares) | shares 62,342
Exercisable options, weighted average exercise price (dollars per share) $ 11.55
$11.35 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Range of Exercise Prices (dollars per share) $ 11.35
Number of Outstanding options (shares) | shares 25,076
Weighted average exercise price (dollars per share) $ 11.35
Weighted average remaining contractual life in years (years) 6 years 1 month 11 days
Number of exercisable options (shares) | shares 13,184
Exercisable options, weighted average exercise price (dollars per share) $ 11.35
$13.70 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Range of Exercise Prices (dollars per share) $ 13.70
Number of Outstanding options (shares) | shares 27,801
Weighted average exercise price (dollars per share) $ 13.70
Weighted average remaining contractual life in years (years) 7 years 1 month 5 days
Number of exercisable options (shares) | shares 10,647
Exercisable options, weighted average exercise price (dollars per share) $ 13.70
$14.76 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Range of Exercise Prices (dollars per share) $ 14.76
Number of Outstanding options (shares) | shares 9,260
Weighted average exercise price (dollars per share) $ 14.76
Weighted average remaining contractual life in years (years) 8 years 1 month 20 days
Number of exercisable options (shares) | shares 1,852
Exercisable options, weighted average exercise price (dollars per share) $ 14.76
$16.01 [Member]  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Range of Exercise Prices (dollars per share) $ 16.01
Number of Outstanding options (shares) | shares 29,506
Weighted average exercise price (dollars per share) $ 16.01
Weighted average remaining contractual life in years (years) 9 years 1 month 10 days
Number of exercisable options (shares) | shares 0
Exercisable options, weighted average exercise price (dollars per share) $ 16.01