Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2018

Basic and Diluted Shares of Consolidated Condensed Statements of Income

The following summarizes the Common Stock included in the basic and diluted shares, as disclosed on the face of the consolidated condensed statements of income:

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Weighted average number of shares for calculation of basic EPS		36,523,742		36,776,545		36,560,193		36,698,618
Stock options under equity incentive plans		143,257		63,826		103,033		97,550
Weighted average number of shares for calculation of diluted EPS		36,666,999		36,840,371		36,663,226		36,796,168

Common Stock Issuable upon Exercise of Certain Stock Options

The following table represents Common Stock issuable upon the exercise of certain stock options that have been excluded from the diluted earnings calculation because the effect of their inclusion would be anti-dilutive.

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Stock options under equity incentive plans		1,530,000		1,857,284		1,742,500		1,857,284