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Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
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Income Taxes [Abstract] |  |
Federal net operating loss carry-forward | $ 33,577 | $ 34,788
State net operating loss carry-forward | 5,372 | 5,791
Federal capital loss carry-forward | 54,445 | 10,597
Unrealized loss on investment in Operating LLC | 49,736 | 68,813
Other | 834 | 754
Gross deferred tax asset | 143,964 | 120,743
Less: valuation allowance | (135,830) | (112,205)
Net deferred tax asset | 8,134 | 8,538
Unrealized gain on debt | (11,938) | (12,426)
Gross deferred tax (liability) | (11,938) | (12,426)
Net deferred tax asset / (liability) | (3,804) | (3,888)
Gross deferred tax asset / (liability) | $ 132,026 | $ 108,317

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