Quarterly report pursuant to Section 13 or 15(d)

Fair Value (Details 1)

v2.4.0.6
Fair Value (Details 1) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2012
Dec. 31, 2011
Jun. 30, 2012
Cusip One [Member]
Jun. 30, 2012
Cusip Two [Member]
Jun. 30, 2012
Cusip Three [Member]
Jun. 30, 2012
Cusip Four [Member]
Jun. 30, 2012
Collateralized Debt Obligations [Member]
Dec. 31, 2011
Collateralized Debt Obligations [Member]
Jun. 30, 2012
Collateralized Debt Obligations [Member]
Cusip One [Member]
Jun. 30, 2012
Collateralized Debt Obligations [Member]
Cusip Two [Member]
Jun. 30, 2012
Collateralized Debt Obligations [Member]
Cusip Three [Member]
Jun. 30, 2012
Collateralized Debt Obligations [Member]
Cusip Four [Member]
Cusip     74043CAC1 74042TAJ0 01449TAB9 01450NAC6            
Deal name     PreTSL XXIV PreTSL XXVII Alesco IX Alesco XVII            
Class     B-1 C-1 A-2A B            
Book value $ 189,057 $ 183,131         $ 5,207 $ 5,214 $ 1,256,972 $ 1,296,077 $ 1,302,536 $ 1,351,903
Fair value 192,705 186,962         1,247 1,361 217,756 186,525 544,350 298,791
Unrealized gains/(losses) (4,004) (3,858)         (3,960) (3,853) (1,039,215) (1,109,552) (758,186) (1,053,112)
Lowest credit rating assigned     Caa3 C B2 C            
Number of performing banks     50 26 53 43            
Number of performing insurance companies     13 7 10              
Number of issuers in default     17 9 2 1            
Number of issuers in deferral     13 7 11 12            
Defaults & deferrals as a % of performing collateral     48.89% 39.16% 22.16% 37.46%            
Subordination:                        
As a % of performing collateral     (6.42%) (22.78%) 31.65% 0.89%            
As a % of performing collateral - adjusted for projected future defaults     (13.58%) (32.31%) 26.11% (9.27%)            
Other-than-temporary impairment model assumptions:                        
Year 1 - issuer average     2.10% 2.40% 2.50% 3.10%            
Year 2 - issuer average     2.10% 2.40% 2.50% 3.10%            
Year 3 - issuer average     2.10% 2.40% 2.50% 3.10%            
> 3 Years - issuer average     (1.00%) [1] (1.00%) [1] (1.00%) [1] (1.00%) [1]            
Discount rate - 3 month Libor, plus implicit yield spread at purchase     1.48% 1.23% 1.27% 1.44%            
Recovery assumptions     (2.00%) [2] (2.00%) [2] (2.00%) [2] (2.00%) [2]            
Prepayments     0.00% 0.00% 0.00% 0.00%            
Other-than-temporary impairment $ 271 $ 265 $ 41,100 $ 132,000 $ 36,600 $ 61,950            
[1] Default rates > 3 years are evaluated on a issuer by issuer basis and range from 0.25% to 5.00%.
[2] Recovery assumptions are evaluated on a issuer by issuer basis and range from 0% to 15% with a five year lag.