Earnings per Share (Details 1) - shares	9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Schedule Of Common Stock Outstanding [Roll Forward]
Outstanding, beginning of period	5,441,190	5,233,986	5,233,986
Issuance of stock: 4% stock dividend	217,155	209,359	209,359
Purchase of treasury stock	(30,033)	0	(2,155)
Outstanding, end of period	5,628,312	5,443,344	5,441,190