OFFSETTING OF ASSETS AND LIABILITIES (Details 2) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Total derivatives, subject to a master netting arrangement or similar arrangement
Gross Amounts of Recognized Liabilities	$ 427,470	$ 657,874
Net Amounts of Liabilities Presented in the Statement of Financial Position	427,470	657,874
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	44,189	21,565
Gross Amounts Not Offset in the Statement of Financial Position, Cash Collateral Paid	72,813	20,373
Total derivatives, subject to a master netting arrangement or similar arrangement, Net Amount	310,468	615,936
Total derivatives
Gross Amounts of Recognized Liabilities	427,470	657,874
Net Amounts of Liabilities Presented in the Statement of Financial Position	427,470	657,874
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	44,189	21,565
Gross Amounts Not Offset in the Statement of Financial Position, Cash Collateral Paid	72,813	20,373
Total derivatives, Net Amount	310,468	615,936
Repurchase agreements
Repurchase agreements	100,000	150,000
Total Liabilities
Gross Amounts of Recognized Liabilities	527,470	807,874
Net Amounts of Liabilities Presented in the Statement of Financial Position	527,470	807,874
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	44,189	21,565
Gross Amounts Not Offset in the Statement of Financial Position, Cash Collateral Paid	72,813	20,373
Net Amount	410,468	765,936
Free-Standing derivatives
Total derivatives, subject to a master netting arrangement or similar arrangement
Gross Amounts of Recognized Liabilities	147,702	46,437
Net Amounts of Liabilities Presented in the Statement of Financial Position	147,702	46,437
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	44,189	21,565
Gross Amounts Not Offset in the Statement of Financial Position, Cash Collateral Paid	72,813	20,373
Total derivatives, subject to a master netting arrangement or similar arrangement, Net Amount	30,700	4,499
Embedded derivative - Modco reinsurance treaties
Total derivatives, subject to a master netting arrangement or similar arrangement
Gross Amounts of Recognized Liabilities	219,532	411,907
Net Amounts of Liabilities Presented in the Statement of Financial Position	219,532	411,907
Total derivatives, subject to a master netting arrangement or similar arrangement, Net Amount	219,532	411,907
Funds withheld derivative
Total derivatives, subject to a master netting arrangement or similar arrangement
Gross Amounts of Recognized Liabilities	49,045
Net Amounts of Liabilities Presented in the Statement of Financial Position	49,045
Total derivatives, subject to a master netting arrangement or similar arrangement, Net Amount	49,045
Embedded derivative - GMWB
Total derivatives, subject to a master netting arrangement or similar arrangement
Gross Amounts of Recognized Liabilities	1,992	199,530
Net Amounts of Liabilities Presented in the Statement of Financial Position	1,992	199,530
Total derivatives, subject to a master netting arrangement or similar arrangement, Net Amount	1,992	199,530
Embedded derivative - FIA
Total derivatives, subject to a master netting arrangement or similar arrangement
Gross Amounts of Recognized Liabilities	9,199
Net Amounts of Liabilities Presented in the Statement of Financial Position	9,199
Total derivatives, subject to a master netting arrangement or similar arrangement, Net Amount	$ 9,199