Stock Options and Restricted Stock - Schedule of Stock Options, By Exercise Price Range (Details) (USD $)	12 Months Ended
	Dec. 31, 2012
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Shares	249,667
Shares exercisable	236,167
3.26-3.84
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Shares	8,500
Option Price per share, lower range limit	$ 3.26
Option Price per share, upper range per limit	$ 3.84
Weighted-average remaining contractual life (years)	8 years 1 month 13 days
Weighted-average exercise price	$ 3.60
Shares exercisable	3,000
6.79-6.90
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Shares	8,000
Option Price per share, lower range limit	$ 6.79
Option Price per share, upper range per limit	$ 6.90
Weighted-average remaining contractual life (years)	6 years 6 months 7 days
Weighted-average exercise price	$ 6.83
Shares exercisable	4,800
9.31-10.46
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Shares	28,106
Option Price per share, lower range limit	$ 9.31
Option Price per share, upper range per limit	$ 10.46
Weighted-average remaining contractual life (years)	3 years 8 months 27 days
Weighted-average exercise price	$ 9.81
Shares exercisable	28,106
11.56-13.86
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Shares	45,552
Option Price per share, lower range limit	$ 11.56
Option Price per share, upper range per limit	$ 13.86
Weighted-average remaining contractual life (years)	2 years 5 months 27 days
Weighted-average exercise price	$ 13.63
Shares exercisable	45,552
13.91-15.65
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Shares	157,009
Option Price per share, lower range limit	$ 13.91
Option Price per share, upper range per limit	$ 15.65
Weighted-average remaining contractual life (years)	2 years 3 months 29 days
Weighted-average exercise price	$ 14.90
Shares exercisable	152,209
19.07
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Shares	2,500
Option Price per share	$ 19.07
Weighted-average remaining contractual life (years)	4 years 0 months 18 days
Weighted-average exercise price	$ 19.07
Shares exercisable	2,500