Preferred Stock, Common Stock and Other Stockholders' Equity (Deficit) (Details) (USD $)	0 Months Ended		1 Months Ended						3 Months Ended													12 Months Ended							3 Months Ended
	Nov. 20, 2013	Jan. 04, 2013	Jun. 30, 2013	Dec. 31, 2012		Jan. 31, 2012	Jun. 30, 2011	Feb. 28, 2011	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012		Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2013	Dec. 31, 2012		Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2013 Long-Term Incentive Plan	Dec. 31, 2013 Employee Stock Purchase Plan	Feb. 18, 2014 Subsequent Event
Common Stock
Number of authorized shares of common stock				140,000,000					140,000,000				140,000,000									140,000,000	140,000,000			140,000,000
Number of shares outstanding				107,637,524	[1]				94,857,347				107,637,524	[1]								94,857,347	107,637,524	[1]		94,857,347
Shares available for future grant (in shares)																											5,083,000	1,883,000
Stock split ratio			2				2
Dividend in form of number of shares for each outstanding share of common stock			1				1
Stock repurchase program
Amount of shares authorized to be repurchased under Stock Repurchase Program	$ 500,000,000.0			$ 500,000,000.0		$ 250,000,000		$ 60,000,000
Period over which shares are authorized to be repurchased (in years)				3 years		4 years		3 years
Aggregate shares repurchased		578,000																					8,499,000		3,235,000	14,775,000			154,000
Value of shares repurchased		$ 18,000,000																				$ 523,589,000	$ 231,984,000		$ 59,998,000	$ 500,000,000			$ 5,600,000
Average price (in dollars per share)		$ 31.16																								$ 33.84			$ 36.10
Cash dividends per share of common stock paid									$ 0.470	$ 0.45	$ 0.45	$ 0.45	$ 0.45		$ 0.30	$ 0.30	$ 0.30	$ 0.03	$ 0.03	$ 0.015	$ 0.015
Preferred Stock
Number of authorized shares of preferred stock									5,000,000													5,000,000				5,000,000

[1] Issued and outstanding stock amounts as of December 31, 2012 have been retroactively adjusted to reflect Holdings’ two-for-one stock split in June 2013, as described in Note 12 to the Consolidated Financial Statements.