Stock Compensation Plans (Details 1) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Options outstanding, January 1, 2014	251,020
Options Outstanding, Forfeited or cancelled	(34,600)
Options Outstanding, Exercised	(53,200)
Options Outstanding, Granted	10,500
Options outstanding, December 31, 2014	173,720
Options Outstanding, Vested or expected to vest at December 31, 2014	173,720
Options Outstanding, Exercisable at December 31, 2014	163,220
Weighted Average Exercise Price, Outstanding, January 1, 2014	$ 20.76
Weighted Average Exercise Price, Forfeited or cancelled	$ 26.52
Weighted Average Exercise Price, Exercised	$ 18.11
Weighted Average Exercise Price, Granted	$ 26.97
Weighted Average Exercise Price, Outstanding, December 31, 2014	$ 20.80
Weighted Average Exercise Price, Vested or expected to vest at December 31, 2014	$ 20.80
Weighted Average Exercise Price, Exercisable at December 31, 2014	$ 20.40
Weighted Average Remaining Contractual Term (in years), Outstanding, December 31, 2014	2 years 8 months 19 days
Weighted Average Remaining Contractual Term (in years), Vested or expected to vest at December 31, 2014	2 years 8 months 19 days
Weighted Average Remaining Contractual Term (in years), Exercisable at December 31, 2014	2 years 3 months 22 days
Aggregate Intrinsic Value, Outstanding, December 31, 2014	$ 2,303
Aggregate Intrinsic Value, Vested or expected to vest at December 31, 2014	2,303
Aggregate Intrinsic Value, Exercisable at December 31, 2014	$ 2,229