Stockholders' (Deficity) Equity

9 Months Ended

Sep. 30, 2015

Stockholders' Equity Note [Abstract]

Stockholders' (Deficit) Equity

Stockholders’ (Deficit) Equity

The following table presents the change in the number of shares of our Class A common stock outstanding during the nine months ended September 30, 2015 and during the year ended December 31, 2014:

	Nine Months Ended September 30, 2015	Twelve Months Ended December 31, 2014
Shares outstanding as of beginning of period	85.1	85.2
Shares issued as part of equity-based compensation plans and the ESPP, net of RSUs surrendered	1.1	1.9
Common stock repurchases	—	(2.0	)
Shares outstanding as of end of period	86.2	85.1

Treasury Stock

In December 2014, our existing stock repurchase program, which was originally announced in May 2010, expired and was not renewed. Under the program, we were 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 the first quarter of 2014, we repurchased approximately 2.0 million shares at an aggregate cost of $29.5 million. Purchases made during 2014 were funded by cash flows from operations, borrowings or a combination thereof. As of the program’s expiration on December 31, 2014, we had $75.0 million remaining available for potential repurchases under the program.

Accumulated Other Comprehensive Loss

During the three and nine months ended September 30, 2015 and 2014, the primary changes in accumulated other comprehensive loss were related to the foreign currency translation component. The foreign exchange rates that had the largest impact on our foreign currency translation in the three and nine months ended September 30, 2015 were the Euro, British Pound Sterling, Australian Dollar and Canadian Dollar. The foreign exchange rates that had the largest impact on our foreign currency translation in the three and nine months ended September 30, 2014 were the Euro and British Pound Sterling. There were no tax effects related to foreign currency translation gains and losses.