Stockholders' Equity

12 Months Ended

Dec. 31, 2013

Stockholders' Equity Note [Abstract]

Stockholders' Equity

Stockholders’ Equity

Stock Repurchase Program

In April 2012, the Company's Board of Directors authorized a $150.0 million stock repurchase program covering a twelve-month period commencing on May 1, 2012. In January 2013, the Board of Directors authorized a $150.0 million extension of its share repurchase program, effective for a twelve-month period beginning February 1, 2013. In October 2013, the Board of Directors authorized a new $750.0 million share repurchase program, effective from October 16, 2013 through December 31, 2016. Unused amounts from the May 2012 program were not carried over to the program approved in January 2013, and unused amounts from the January 2013 program were not carried over to the October 2013 program.

During the years ended December 31, 2013, 2012 and 2011, the Company repurchased 3.9 million, 4.4 million and 12.3 million shares, respectively, of its common stock for $160.4 million, $141.5 million and $324.7 million, respectively. As of December 31, 2013, the Company had $702.3 million remaining available for future purchases of shares under the approved repurchase program.

The Board of Directors authorized the retirement of all the outstanding shares of its treasury stock as of December 31, 2013. The retired shares were returned to the number of authorized but unissued shares of the Company's common stock.