Income Taxes (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Taxes
U.S. federal income tax gain on distribution of the assets			$ 400,000,000
Income tax expense	278,000	0	278,000	0
Amount of valuation allowance reversed			100,000,000
Gross deferred tax assets transferred as a result of spin-off			$ 9,000,000