Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2017

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,
	2017	2016	2017	2016
Common shares outstanding, end of period	37,288	37,444	37,288	37,444
Effect of using weighted average common shares outstanding	8	(7)	(16)	(54)
Shares used in computing earnings per share—basic	37,296	37,437	37,272	37,390
Effect of shares issuable under stock option plans based on the treasury stock method	308	351	321	336
Effect of restricted and contingently issuable shares	101	123	121	144
Shares used in computing earnings per share—diluted	37,705	37,911	37,714	37,870