Stock Plans (Stock Option Activity) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Number of Shares
Balance at December 31, 2013	862,306
Granted	0
Exercised	(102,795)
Canceled	(87,500)
Balance at December 31, 2014	672,011
Vested or expected to vest at December 31, 2014	672,011
Exercisable at December 31, 2014	672,011	759,936	807,146
Weighted Average Exercise Price
Balance at December 31, 2013	$ 11.24
Granted	$ 0.00
Exercised	$ 9.43
Canceled	$ 7.55
Balance at December 31, 2014	$ 12.00
Vested or expected to vest at December 31, 2014	$ 12.00
Exercisable at December 31, 2014	$ 12.00	$ 11.51	$ 11.53
Additional Disclosures
Balance at period end, Weighted Average Remaining Contractual Term (in years)	3 years 2 months 23 days
Balance at period end, Aggregate Intrinsic Value	$ 315,561
Vested or expected to vest, Weighted Average Contractual Term (in years)	3 years 2 months 23 days
Vested or expected to vest, Aggregate Intrinsic Value	315,561
Exercisable, Weighted Average Contractual Term (in years)	3 years 2 months 23 days
Exercisable, Aggregate Intrinsic Value	$ 315,561