Annual report pursuant to Section 13 and 15(d)

Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis (Details)

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Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Real estate securities, available-for-sale:    
Investments in excess mortgage servicing rights at fair value*(H) $ 245,036 $ 43,971
Principal Balance
    
Real estate securities, available-for-sale:    
CMBS 474,992  
REIT debt 62,700  
ABS - subprime 558,215  
ABS - other real estate 10,098  
FNMA/FHLMC 768,619  
CDO 203,477  
Real estate securities total 2,078,101  
Investments in excess mortgage servicing rights at fair value*(H) 76,560,751  
Derivative assets:    
Interest rate caps, not treated as hedges 23,400  
Derivative assets total 23,400  
Derivative Liabilities:    
Interest rate swaps, treated as hedges 154,450  
Interest rate swaps, not treated as hedges 294,203  
Derivatives liabilities total 448,653  
Carrying (Reported) Amount, Fair Value Disclosure
    
Real estate securities, available-for-sale:    
CMBS 376,391  
REIT debt 66,174  
ABS - subprime 355,975  
ABS - other real estate 1,475  
FNMA/FHLMC 820,535  
CDO 71,025  
Real estate securities total 1,691,575  
Investments in excess mortgage servicing rights at fair value*(H) 245,036 43,971
Derivative assets:    
Interest rate caps, not treated as hedges 165 862
Derivative assets total 165  
Derivative Liabilities:    
Interest rate swaps, treated as hedges 12,175 90,025
Interest rate swaps, not treated as hedges 19,401 29,295
Derivatives liabilities total 31,576  
Estimate of Fair Value, Fair Value Disclosure
    
Real estate securities, available-for-sale:    
CMBS 376,391  
REIT debt 66,174  
ABS - subprime 355,975  
ABS - other real estate 1,475  
FNMA/FHLMC 820,535  
CDO 71,025  
Real estate securities total 1,691,575  
Investments in excess mortgage servicing rights at fair value*(H) 245,036 43,971
Derivative assets:    
Interest rate caps, not treated as hedges 165 862
Derivative assets total 165  
Derivative Liabilities:    
Interest rate swaps, treated as hedges 12,175 90,025
Interest rate swaps, not treated as hedges 19,401 29,295
Derivatives liabilities total 31,576  
Fair Value, Inputs, Level 2
    
Real estate securities, available-for-sale:    
CMBS     
REIT debt 66,174  
ABS - subprime     
ABS - other real estate     
FNMA/FHLMC 820,535  
CDO     
Real estate securities total 886,709  
Investments in excess mortgage servicing rights at fair value*(H)     
Derivative assets:    
Interest rate caps, not treated as hedges 165  
Derivative assets total 165  
Derivative Liabilities:    
Interest rate swaps, treated as hedges 12,175  
Interest rate swaps, not treated as hedges 19,401  
Derivatives liabilities total 31,576  
Fair Value, Inputs, Level 3A
    
Real estate securities, available-for-sale:    
CMBS 330,026  
REIT debt     
ABS - subprime 330,021  
ABS - other real estate 798  
FNMA/FHLMC     
CDO 65,027  
Real estate securities total 725,872  
Investments in excess mortgage servicing rights at fair value*(H)     
Derivative assets:    
Interest rate caps, not treated as hedges     
Derivative assets total     
Derivative Liabilities:    
Interest rate swaps, treated as hedges     
Interest rate swaps, not treated as hedges     
Derivatives liabilities total     
Fair Value, Inputs, Level 3B
    
Real estate securities, available-for-sale:    
CMBS 46,365  
REIT debt     
ABS - subprime 25,954  
ABS - other real estate 677  
FNMA/FHLMC     
CDO 5,998  
Real estate securities total 78,994  
Investments in excess mortgage servicing rights at fair value*(H) 245,036  
Derivative assets:    
Interest rate caps, not treated as hedges     
Derivative assets total     
Derivative Liabilities:    
Interest rate swaps, treated as hedges     
Interest rate swaps, not treated as hedges     
Derivatives liabilities total