Income Taxes (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) subsidiary	Sep. 30, 2014 USD ($)
Income Taxes [Abstract]
Gross unrecognized tax benefits	$ 16,400,000		$ 16,400,000
Unrecognized tax benefits interest and penalties	0
Unrecognized tax benefits accrued interest and penalties	0		$ 0
Number of partially owned subsidiaries | subsidiary			3
Federal income tax benefit or expense	$ 0	$ 0	$ 0	$ 0