Stock Repurchase Program (Details) - USD ($)		9 Months Ended
	Aug. 24, 2015	Sep. 30, 2015	Sep. 30, 2014	Oct. 31, 2015	Aug. 15, 2015
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 5,700,000
Payments for Repurchase of Common Stock		$ 304,924,000	$ 0
Subsequent Event
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Authorized Amount				$ 200,000,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount				$ 205,700,000
August 2015 Share Repurchase
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Authorized Amount					$ 300,000,000.0
Stock Repurchased During Period, Shares		16,982,739
August 2015 Share Repurchase Pursuant To Tender Offer
Equity, Class of Treasury Stock [Line Items]
Treasury Stock Acquired, Average Cost Per Share (in dollars per share)	$ 18.00
Stock Repurchased During Period, Shares	16,348,143
Payments for Repurchase of Common Stock	$ 294,300,000
August 2015 Share Repurchase Pursuant To Tender Offer | Fairholme Capital Management, L.L.C.
Equity, Class of Treasury Stock [Line Items]
Stock Repurchased During Period, Shares	100,000
Previous Stock Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Remaining Authorized Repurchase Amount					$ 93,600,000
Treasury Stock Acquired, Average Cost Per Share (in dollars per share)		$ 16.03
Stock Repurchased During Period, Shares		634,596