Shareholders' Equity (Detail Textuals)	9 Months Ended
	Sep. 30, 2017 shares
Equity, Class of Treasury Stock [Line Items]
Shares purchased during period	19,917
Share Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Number of common shares authorized to be purchased	450,000
Shares purchased during period	349,330
Remaining number of shares authorized to be purchased	100,670