Common Stock and Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2018

Common Stock and Earnings Per Share [Abstract]

Shares Used in Computing Basic and Diluted Earnings per Share

	Three Months Ended September 30				Nine Months Ended September 30
	2018		2017		2018		2017
Weighted average common shares, basic		12,912,833		12,847,135		12,895,144		12,845,388
Effect of dilutive securities:
Employee stock-based compensation		196		121		120		74
Weighted average common shares, diluted		12,913,029		12,847,256		12,895,264		12,845,462