Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2015

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):

	Year Ended December 31,
	2015		2014		2013
Common shares outstanding, end of period		37,427		37,270		37,578
Effect of using weighted average common shares outstanding		15		277		(333	)
Shares used in computing earnings per share—basic		37,442		37,547		37,245
Effect of shares issuable under stock option plans based on the treasury stock method		266		147		183
Effect of contingently issuable restricted shares		160		103		108
Shares used in computing earnings per share—diluted		37,868		37,797		37,536