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	$ 498,200	$ 457,802
Net Amounts of Liabilities Presented in the Statement of Financial Position	498,200	457,802
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	387,598	306,956
Total derivatives
Gross Amounts of Recognized Liabilities	498,200	457,802
Net Amounts of Liabilities Presented in the Statement of Financial Position	498,200	457,802
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	387,598	306,956
Repurchase agreements
Repurchase agreements	475,000	350,000
Total Liabilities
Gross Amounts of Recognized Liabilities	973,200	807,802
Net Amounts of Liabilities Presented in the Statement of Financial Position	973,200	807,802
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	862,598	656,956
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
Embedded derivative - GMWB
Total derivatives, subject to a master netting arrangement or similar arrangement
Gross Amounts of Recognized Liabilities	68,855	38,388
Net Amounts of Liabilities Presented in the Statement of Financial Position	68,855	38,388
Total derivatives, subject to a master netting arrangement or similar arrangement, Net Amount	68,855	38,388
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