Stockholders' Equity

12 Months Ended

Dec. 31, 2013

Stockholders' Equity Note [Abstract]

Stockholders' Equity

Stockholders' Equity (all share amounts in thousands)

The following sets forth the change in the number of shares of Class A common stock outstanding during the fiscal years ended December 31, 2013 and 2012:

	December 31,
	2013		2012
Shares outstanding as of beginning of period	84,395		92,433
Shares issued as part of equity-based compensation plans and the ESPP, net of shares surrendered	1,121		1,119
Shares repurchased into treasury stock	(276	)	(9,157	)
Shares outstanding as of end of period	85,240		84,395

Treasury Stock

On December 5, 2013, our board of directors approved an extension of our existing stock repurchase program to December 31, 2014. The program, originally announced in May 2010, was due to expire on December 31, 2013. Under the program, we are authorized to repurchase, from time to time through open market purchases or otherwise, shares of our outstanding common stock in an aggregate amount up to $200.0 million. During 2013, we repurchased approximately 50 shares at an aggregate cost of $0.8 million. As of December 31, 2013, we had $104.5 million available for potential repurchases under the program. Purchases made during 2013 were funded by cash flows from operations, borrowings, or a combination thereof.

During the first quarter of 2014, we purchased 2,000 shares at an aggregate cost of $29.5 million. We have $75.0 million available for potential repurchases under the program as of the date of this Annual Report on Form 10-K.

During 2012, we repurchased 9,157 shares at an aggregate cost of $68.5 million. As of December 31, 2012, we had $105.2 million available for potential repurchases under the program. Purchases made during 2012 were funded by cash flows from operations, borrowings, or a combination thereof.