Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2019

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
	March 31,
	2019	2018
Common shares outstanding, end of period	36,891	37,088
Effect of using weighted average common shares outstanding	32	104
Shares used in computing earnings per share—basic	36,923	37,192
Effect of shares issuable under stock option plans based on the treasury stock method	230	317
Effect of restricted and contingently issuable shares	81	119
Shares used in computing earnings per share—diluted	37,234	37,628