Income Taxes (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Income Taxes
U.S. federal income tax gain on distribution of the assets			$ 400,000,000
U.S. state income tax gain on distribution of the assets			100,000,000
Income tax expense	(278,000)	0	0	0
Amount of valuation allowance reversed			100,000,000
Gross deferred tax assets transferred as a result of spin-off			$ 9,000,000