Annual report pursuant to Section 13 and 15(d)

Equity Securities, at Fair Value (Details)

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Equity Securities, at Fair Value (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 19, 2012
Schedule of Equity Securities [Line Items]      
Equity Securities, Shares     17,824,647
Investment in Common Stock of Silver Bay, Ownership Percentage     47.70%
Initial Public Offering of Silver Bay Common Stock, Price Per Share     $ 18.50
Equity Securities, Cost Basis   $ 329,756  
Equity Securities, Gross Unrealized Gain (Loss)   5,882  
Equity securities, at fair value 0 335,638  
Realized Investment Gains (Losses) 13,725    
Equity Securities, Unrealized Gain (Loss) $ (5,882)