Income per Common Share (Tables)

9 Months Ended

Sep. 30, 2015

Earnings Per Share [Abstract]

Reconciliation of Weighted-Average Shares Used for the Basic Computation and that Used for the Diluted Computation

A reconciliation of weighted-average shares used for the basic computation and that used for the diluted computation is as follows:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2015		2014		2015		2014
Weighted-average shares for basic		4,861,697		4,857,083		4,860,820		4,853,985
Dilutive effect of convertible preferred stock and stock    options		71,085		74,152		73,427		75,074
Weighted-average shares for diluted		4,932,782		4,931,235		4,934,247		4,929,059