OFFSETTING OF ASSETS AND LIABILITIES (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Total derivatives, subject to a master netting arrangement or similar arrangement
Gross Amounts of Recognized Assets	$ 139,355
Net Amounts of Assets Presented in the Statement of Financial Position	139,355
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	31,046
Gross Amounts Not Offset in the Statement of Financial Position, Cash Collateral Received	2,500
Total derivatives, subject to a master netting arrangement or similar arrangement, Net Amount	105,809
Total derivatives, not subject to a master netting arrangement or similar arrangement
Gross Amounts of Recognized Assets	240
Net Amounts of Assets Presented in the Statement of Financial Position	240
Total derivatives, not subject to a master netting arrangement or similar arrangement, Net Amount	240
Total derivatives
Gross Amounts of Recognized Assets	139,595	113,364
Net Amounts of Assets Presented in the Statement of Financial Position	139,595
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	31,046
Gross Amounts Not Offset in the Statement of Financial Position, Cash Collateral Received	2,500
Total derivatives, Net Amount	106,049
Total Assets
Gross Amounts of Recognized Assets	139,595
Net Amounts of Assets Presented in the Statement of Financial Position	139,595
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	31,046
Gross Amounts Not Offset in the Statement of Financial Position, Cash Collateral Received	2,500
Total derivatives, Net Amount	106,049
Free-Standing derivatives
Total derivatives, subject to a master netting arrangement or similar arrangement
Net Amounts of Assets Presented in the Statement of Financial Position	82,238
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	31,046
Gross Amounts Not Offset in the Statement of Financial Position, Cash Collateral Received	2,500
Total derivatives, subject to a master netting arrangement or similar arrangement, Net Amount	48,692
Total derivatives
Gross Amounts of Recognized Assets	82,238
Embedded derivative - Modco reinsurance treaties
Total derivatives, subject to a master netting arrangement or similar arrangement
Net Amounts of Assets Presented in the Statement of Financial Position	1,321
Total derivatives, subject to a master netting arrangement or similar arrangement, Net Amount	1,321
Total derivatives
Gross Amounts of Recognized Assets	1,321
Embedded derivative - GMWB
Total derivatives, subject to a master netting arrangement or similar arrangement
Net Amounts of Assets Presented in the Statement of Financial Position	55,796
Total derivatives, subject to a master netting arrangement or similar arrangement, Net Amount	55,796
Total derivatives
Gross Amounts of Recognized Assets	$ 55,796