Stock Option Programs and Share-based Compensation Expense (Details) - Employee Stock Option [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, Outstanding, Begining Balance	384,000	358,500
Shares, Granted	24,750	25,500
Shares, Expired	(3,500)
Shares, Exercised	(12,500)
Shares, Outstanding, Ending Balance	392,750	384,000
Shares, Exercisable	377,250
Weighted-Average Exercise Price, Outstanding, Begining Balance	$ 7.60	$ 7.54
Weighted-Average Exercise Price, Granted	9.59	8.18
Weighted-Average Exercise Price, Expired	8.62
Weighted- Average Exercise Price, Exercised	6.97
Weighted-Average Exercise Price, Outstanding, Ending Balance	7.65	$ 7.60
Weighted-Average Exercise Price, Exercisable	$ 7.56
Weighted- Average Remaining Contractual Term (Years), Outstanding	4 years 3 months 18 days
Weighted- Average Remaining Contractual Term (Years), Exercisable	4 years 1 month 6 days
Aggregate Intrinsic Value, Outstanding	$ 782
Aggregate Intrinsic Value, Exercisable	$ 782