Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2018

Stockholders' Equity

Reconciliation of number of shares outstanding with the number of shares used in computing basic and diluted earnings per share

The following table reconciles the number of shares outstanding with the number of shares used in computing basic and diluted earnings per share for each of the periods presented (in thousands):

	Three Months Ended		Six Months Ended
	June 30,		June 30,
	2018	2017	2018	2017
Common shares outstanding, end of period	37,246	37,288	37,246	37,288
Effect of using weighted average common shares outstanding	(26)	8	(40)	(16)
Shares used in computing earnings per share—basic	37,220	37,296	37,206	37,272
Effect of shares issuable under stock option plans based on the treasury stock method	309	308	341	321
Effect of restricted and contingently issuable shares	76	101	70	121
Shares used in computing earnings per share—diluted	37,605	37,705	37,617	37,714