Annual report pursuant to Section 13 and 15(d)

Income Taxes Components of Deferred Tax Assets (Details)

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Income Taxes Components of Deferred Tax Assets (Details) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Deferred Tax Assets, Gross [Abstract]    
Net operating loss carryforwards - Federal $ 476,228,000 [1] $ 365,811,000 [1]
Net operating loss carryforwards - State 83,242,000 [1] 49,847,000 [1]
Capital Gains 81,388,000 81,388,000 [1]
Share-based compensation expense 5,679,000 4,165,000 [1]
United kingdom deferred tax assets 258,000 117,000 [1]
Other 17,606,000 19,565,000 [1]
Deferred Tax Assets, Total 664,401,000 520,893,000 [1]
Deferred Tax Liabilities [Abstract]    
Investment in limited partnerships (94,434,000) (79,281,000) [1]
Other (307,000) (4,856,000) [1]
Deferred Tax Liabilities, Total (94,741,000) (84,137,000) [1]
Net deferred tax assets 569,660,000 436,756,000 [1]
Less: net deferred tax asset valuation allowance (569,402,000) [1] (436,639,000) [1]
Deferred Tax Assets, Net 258,000 117,000 [1]
Valuation Allowance [Abstract]    
Change in deferred tax asset valuation allowance 132,700,000 83,500,000
Change in Valuation Allowance from continuing operations 114,500,000  
Change in Valuation Allowance related to OCI 9,200,000  
Change in Valuation Allowance due to prior period Adjustment $ 9,000,000  
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