Share-Based Payments (Details 1)	9 Months Ended
	Sep. 30, 2016 $ / shares shares
Shares
Outstanding, beginning balance	709,300
Options granted	5,000
Options cancelled	(22,250)
Options exercised	(66,290)
Outstanding, ending balance	625,760
Options exercisable	232,680
Options available for future grants	195,295
Weighted Average Exercise Price
Outstanding, beginning balance | $ / shares	$ 24.34
Options granted | $ / shares	26.4
Options cancelled | $ / shares	27.21
Options exercised | $ / shares	18.62
Outstanding, ending balance | $ / shares	24.86
Options exercisable | $ / shares	$ 22.81