Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2012

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,
	2012		2011		2010
Common shares outstanding, end of period(a)		37,069		37,050		37,532
Effect of using weighted average common shares outstanding		43		339		17
Shares used in computing earnings per share—basic		37,112		37,389		37,549
Effect of shares issuable under stock option plans based on the treasury stock method		87		—		241
Effect of contingently issuable restricted shares		60		—		—
Shares used in computing earnings per share—diluted		37,259		37,389		37,790

(a)

Excludes 0.2 million, 0.4 million and 0.4 million shares of unvested contingently issuable restricted stock outstanding for the years ended December 31, 2012, 2011 and 2010, respectively (see Note 14 "Stock-Based Compensation").