Stockholders' Equity

12 Months Ended

Dec. 31, 2011

Stockholders' Equity [Abstract]

Stockholders' Equity

12. Stockholders' Equity

Stock Repurchase Program. We currently have a stock repurchase program, approved by our Board of Directors, authorizing us to repurchase shares of our common stock from time-to-time as market and business conditions warrant (the "Stock Repurchase Program").

As of December 31, 2011, a summary of the shares repurchased under the Stock Repurchase Program is as follows (in thousands, except per share amounts):

	2011		2010		2009		2008		1999-2007		Total
Shares repurchased		750		1,500		250		250		28,796		31,546
Total amount paid	$	9,930	$	29,340	$	3,782	$	3,983	$	696,457	$	743,492
Weighted-average price per share	$	13.24	$	19.56	$	15.13	$	15.93	$	24.19	$	23.57

As of December 31, 2011, the total remaining number of shares available for repurchase under the Stock Repurchase Program totaled approximately 3.5 million shares.

In addition to the above mentioned stock repurchases, during 2011, 2010, and 2009, we repurchased and then cancelled approximately 232,000 shares, 232,000 shares, and 195,000 shares for $4.4 million, $4.7 million, and $2.8 million, respectively, of common stock from our employees in connection with minimum tax withholding requirements resulting from the vesting of restricted stock under our stock incentive plans.

Convertible Debt Securities. Under GAAP, convertible debt securities that may be settled in cash upon conversion (including partial cash settlement) must be separated into their liability and equity components at initial recognition by: (i) recording the liability component at the fair value of a similar liability that does not have an associated equity component; and (ii) attributing the remaining proceeds from the issuance to the equity component. The carrying amount of the equity component related to our convertible debt securities outstanding, included within additional paid-in capital, net of tax, as of December 31, 2011 and 2010, was $22.9 million and $61.1 million, respectively.