Income Taxes Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred Tax Assets:
Basis difference – investments	$ 18,043	$ 20,049
Federal net operating loss carryforwards	239,003	227,519
State net operating loss carryforwards	20,168	16,922
Other	4,882	5,102
Gross deferred tax asset	282,096	269,592
Valuation allowance	(281,548)	(268,592)
Deferred tax assets, net	548	1,000
Deferred Tax Liabilities:
Other	548	1,000
Deferred tax liability	548	1,000
Deferred tax asset	$ 0	$ 0