OFFSETTING OF ASSETS AND LIABILITIES (Details) (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 Assets	$ 277,373	$ 307,116
Net Amounts of Assets Presented in the Statement of Financial Position	277,373	307,116
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 Received	18,950	10,700
Total derivatives, subject to a master netting arrangement or similar arrangement, Net Amount	206,436	243,929
Total derivatives, not subject to a master netting arrangement or similar arrangement
Total derivatives, not subject to a master netting arrangement or similar arrangement	351	451
Total derivatives
Gross Amounts of Recognized Assets	277,724	307,567
Net Amounts of Assets Presented in the Statement of Financial Position	277,724	307,567
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 Received	18,950	10,700
Total derivatives, Net Amount	206,787	244,380
Free-Standing derivatives
Total derivatives, subject to a master netting arrangement or similar arrangement
Gross Amounts of Recognized Assets	133,565	110,983
Net Amounts of Assets Presented in the Statement of Financial Position	133,565	110,983
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 Received	18,950	10,700
Total derivatives, subject to a master netting arrangement or similar arrangement, Net Amount	62,628	47,796
Embedded derivative - Modco reinsurance treaties
Total derivatives, subject to a master netting arrangement or similar arrangement
Gross Amounts of Recognized Assets	1,011	1,517
Net Amounts of Assets Presented in the Statement of Financial Position	1,011	1,517
Total derivatives, subject to a master netting arrangement or similar arrangement, Net Amount	1,011	1,517
Embedded derivative - GMWB
Total derivatives, subject to a master netting arrangement or similar arrangement
Gross Amounts of Recognized Assets	142,797	194,616
Net Amounts of Assets Presented in the Statement of Financial Position	142,797	194,616
Total derivatives, subject to a master netting arrangement or similar arrangement, Net Amount	$ 142,797	$ 194,616