v2.4.0.8
FAIR VALUE MEASUREMENTS (DETAILS 3) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Fixed Maturities [Member]
        
Changes in Level 3 Financial Instruments Measured at Fair Value on a Recurring Basis [Line Items]        
Balance at beginning of period $ 280,649 $ 51,965 $ 70,931 $ 50,878
Transfers into Level 3 0 0 8,382 0
Transfers out of Level 3 (214,435) 0 (214,435) 0
Included in earnings 0 0 1,438 0
Included in OCI 547 164 969 1,427
Purchases 0 0 212,889 0
Sales 0 0 (13,290) 0
Settlements / distributions (851) (635) (974) (811)
Balance at end of period 65,910 51,494 65,910 51,494
Change in unrealized investment gain/loss relating to assets held at the reporting date 0 0 0 0
Other Investments [Member]
        
Changes in Level 3 Financial Instruments Measured at Fair Value on a Recurring Basis [Line Items]        
Balance at beginning of period 481,407 425,694 422,431 412,804
Transfers into Level 3 29,953 0 29,953 0
Transfers out of Level 3 0 0 0 0
Included in earnings 12,034 (627) 40,515 24,295
Included in OCI 0 0 0 0
Purchases 1,796 0 54,232 0
Sales 0 0 0 0
Settlements / distributions (23,694) (8,979) (45,635) (21,011)
Balance at end of period 501,496 416,088 501,496 416,088
Change in unrealized investment gain/loss relating to assets held at the reporting date 12,034 (627) 40,515 24,295
Total Assets [Member]
        
Changes in Level 3 Financial Instruments Measured at Fair Value on a Recurring Basis [Line Items]        
Balance at beginning of period 762,056 477,659 493,362 463,682
Transfers into Level 3 29,953 0 38,335 0
Transfers out of Level 3 (214,435) 0 (214,435) 0
Included in earnings 12,034 (627) 41,953 24,295
Included in OCI 547 164 969 1,427
Purchases 1,796 0 267,121 0
Sales 0 0 (13,290) 0
Settlements / distributions (24,545) (9,614) (46,609) (21,822)
Balance at end of period 567,406 467,582 567,406 467,582
Change in unrealized investment gain/loss relating to assets held at the reporting date 12,034 (627) 40,515 24,295
Corporate Debt [Member] | Fixed Maturities [Member]
        
Changes in Level 3 Financial Instruments Measured at Fair Value on a Recurring Basis [Line Items]        
Balance at beginning of period 0 1,550 1,550 1,550
Transfers into Level 3 0 0 0 0
Transfers out of Level 3 0 0 0 0
Included in earnings 0 0 1,550 0
Included in OCI 0 0 0 0
Purchases 0 0 0 0
Sales 0 0 (3,100) 0
Settlements / distributions 0 0 0 0
Balance at end of period 0 1,550 0 1,550
Change in unrealized investment gain/loss relating to assets held at the reporting date 0 0 0 0
Non-Agency RMBS [Member] | Fixed Maturities [Member]
        
Changes in Level 3 Financial Instruments Measured at Fair Value on a Recurring Basis [Line Items]        
Balance at beginning of period 1,300 0 1,110 0
Transfers into Level 3 0 0 0 0
Transfers out of Level 3 (1,223) 0 (1,223) 0
Included in earnings 0 0 0 0
Included in OCI (77) 0 135 0
Purchases 0 0 0 0
Sales 0 0 0 0
Settlements / distributions 0 0 (22) 0
Balance at end of period 0 0 0 0
Change in unrealized investment gain/loss relating to assets held at the reporting date 0 0 0 0
CMBS [Member] | Fixed Maturities [Member]
        
Changes in Level 3 Financial Instruments Measured at Fair Value on a Recurring Basis [Line Items]        
Balance at beginning of period 12,600 0 4,296 0
Transfers into Level 3 0 0 8,382 0
Transfers out of Level 3 0 0 0 0
Included in earnings 0 0 0 0
Included in OCI (69) 0 (147) 0
Purchases 0 0 0 0
Sales 0 0 0 0
Settlements / distributions (746) 0 (746) 0
Balance at end of period 11,785 0 11,785 0
Change in unrealized investment gain/loss relating to assets held at the reporting date 0 0 0 0
ABS [Member] | Fixed Maturities [Member]
        
Changes in Level 3 Financial Instruments Measured at Fair Value on a Recurring Basis [Line Items]        
Balance at beginning of period 266,749 50,415 63,975 49,328
Transfers into Level 3 0 0 0 0
Transfers out of Level 3 (213,212) 0 (213,212) 0
Included in earnings 0 0 (112) 0
Included in OCI 693 164 981 1,427
Purchases 0 0 212,889 0
Sales 0 0 (10,190) 0
Settlements / distributions (105) (635) (206) (811)
Balance at end of period 54,125 49,944 54,125 49,944
Change in unrealized investment gain/loss relating to assets held at the reporting date 0 0 0 0
Hedge Funds [Member] | Other Investments [Member]
        
Changes in Level 3 Financial Instruments Measured at Fair Value on a Recurring Basis [Line Items]        
Balance at beginning of period 414,716 364,786 359,996 346,244
Transfers into Level 3 29,953 0 29,953 0
Transfers out of Level 3 0 0 0 0
Included in earnings 6,962 (10,261) 25,490 11,271
Included in OCI 0 0 0 0
Purchases 0 0 50,000 0
Sales 0 0 0 0
Settlements / distributions (7,411) (3) (21,219) (2,993)
Balance at end of period 444,220 354,522 444,220 354,522
Change in unrealized investment gain/loss relating to assets held at the reporting date 6,962 (10,261) 25,490 11,271
Direct Lending Funds [Member] | Other Investments [Member]
        
Changes in Level 3 Financial Instruments Measured at Fair Value on a Recurring Basis [Line Items]        
Balance at beginning of period 2,436 0 0 0
Transfers into Level 3 0 0 0 0
Transfers out of Level 3 0 0 0 0
Included in earnings 0 0 0 0
Included in OCI 0 0 0 0
Purchases 1,796 0 4,232 0
Sales 0 0 0 0
Settlements / distributions 0 0 0 0
Balance at end of period 4,232 0 4,232 0
Change in unrealized investment gain/loss relating to assets held at the reporting date 0 0 0 0
CLO-Equities [Member] | Other Investments [Member]
        
Changes in Level 3 Financial Instruments Measured at Fair Value on a Recurring Basis [Line Items]        
Balance at beginning of period 64,255 60,908 62,435 66,560
Transfers into Level 3 0 0 0 0
Transfers out of Level 3 0 0 0 0
Included in earnings 5,072 9,634 15,025 13,024
Included in OCI 0 0 0 0
Purchases 0 0 0 0
Sales 0 0 0 0
Settlements / distributions (16,283) (8,976) (24,416) (18,018)
Balance at end of period 53,044 61,566 53,044 61,566
Change in unrealized investment gain/loss relating to assets held at the reporting date $ 5,072 $ 9,634 $ 15,025 $ 13,024