Income Taxes (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Income Tax Contingency [Line Items]
Release of unrecognized tax benefits	$ (12,607,000)	$ 0	$ (12,607,000)	$ 0
Adoptation of safe harbor method, adjustment	4,300,000
Unrecognized tax benefits	96,000,000		96,000,000
Interest expense or penalties, uncertain tax positions			400,000	0
Accrued interest, uncertain tax positions	0	0	0	0	400,000
Unrecognized tax benefits that would impact effective tax rate	$ 66,200,000		$ 66,200,000
Internal Revenue Service (IRS) [Member]
Income Tax Contingency [Line Items]
Earliest year subject to examination			2000