Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2021

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		Nine Months Ended
	September 30,		September 30,
	2021	2020	2021	2020
Common shares outstanding, end of period	36,042	36,400	36,042	36,400
Effect of using weighted average common shares outstanding	254	157	286	204
Shares used in computing earnings per share—basic	36,296	36,557	36,328	36,604
Effect of shares issuable under stock option plans based on the treasury stock method	73	125	100	124
Effect of restricted and contingently issuable shares	65	68	72	69
Shares used in computing earnings per share—diluted	36,434	36,750	36,500	36,797