OFFSETTING OF ASSETS AND LIABILITIES (Details 2) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Total derivatives, subject to a master netting arrangement or similar arrangement
Gross Amounts of Recognized Liabilities	$ 488,174	$ 455,161
Net Amounts of Liabilities Presented in the Statement of Financial Position	488,174	455,161
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	51,987	52,487
Gross Amounts Not Offset in the Statement of Financial Position, Cash Collateral Paid	58,615	98,359
Total derivatives, subject to a master netting arrangement or similar arrangement, Net Amount	377,572	304,315
Total derivatives
Gross Amounts of Recognized Liabilities	488,174	455,161
Net Amounts of Liabilities Presented in the Statement of Financial Position	488,174	455,161
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	51,987	52,487
Gross Amounts Not Offset in the Statement of Financial Position, Cash Collateral Paid	58,615	98,359
Total derivatives, Net Amount	377,572	304,315
Repurchase agreements
Repurchase agreements	475,000	350,000
Total Liabilities
Gross Amounts of Recognized Liabilities	963,174	805,161
Net Amounts of Liabilities Presented in the Statement of Financial Position	963,174	805,161
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	51,987	52,487
Gross Amounts Not Offset in the Statement of Financial Position, Cash Collateral Paid	58,615	98,359
Net Amount	852,572	654,315
Free-Standing derivatives
Total derivatives, subject to a master netting arrangement or similar arrangement
Gross Amounts of Recognized Liabilities	126,835	187,172
Net Amounts of Liabilities Presented in the Statement of Financial Position	126,835	187,172
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	51,987	52,487
Gross Amounts Not Offset in the Statement of Financial Position, Cash Collateral Paid	58,615	98,359
Total derivatives, subject to a master netting arrangement or similar arrangement, Net Amount	16,233	36,326
Embedded derivative - Modco reinsurance treaties
Total derivatives, subject to a master netting arrangement or similar arrangement
Gross Amounts of Recognized Liabilities	266,581	206,918
Net Amounts of Liabilities Presented in the Statement of Financial Position	266,581	206,918
Total derivatives, subject to a master netting arrangement or similar arrangement, Net Amount	266,581	206,918
Funds withheld derivative
Total derivatives, subject to a master netting arrangement or similar arrangement
Gross Amounts of Recognized Liabilities	52,790	34,251
Net Amounts of Liabilities Presented in the Statement of Financial Position	52,790	34,251
Total derivatives, subject to a master netting arrangement or similar arrangement, Net Amount	52,790	34,251
Embedded derivative - GMWB
Total derivatives, subject to a master netting arrangement or similar arrangement
Gross Amounts of Recognized Liabilities	6,039	1,496
Net Amounts of Liabilities Presented in the Statement of Financial Position	6,039	1,496
Total derivatives, subject to a master netting arrangement or similar arrangement, Net Amount	6,039	1,496
Embedded derivative - FIA
Total derivatives, subject to a master netting arrangement or similar arrangement
Gross Amounts of Recognized Liabilities	35,929	25,324
Net Amounts of Liabilities Presented in the Statement of Financial Position	35,929	25,324
Total derivatives, subject to a master netting arrangement or similar arrangement, Net Amount	$ 35,929	$ 25,324