FAIR VALUE OF FINANCIAL INSTRUMENTS (Details 3) (USD $)	6 Months Ended
	Jun. 30, 2012
Other corporate bonds
Unobservable Input
Financial instruments with book value approximating to fair value	$ 25,000,000
Corporate bonds | Liberty Life
Unobservable Input
Acquired surplus note	40,000,000
Level 3
Unobservable Input
Financial instruments that are valued using broker quotes	70,300,000
Financial instruments with book value approximating to fair value	134,700,000
Level 3 | Other asset-backed securities
Unobservable Input
Financial instruments that are valued using broker quotes	65,100,000
Level 3 | Equity securities
Unobservable Input
Financial instruments that are valued using broker quotes	5,200,000
FHLB stock	68,500,000
Level 3 | Other fixed maturity securities
Unobservable Input
Financial instruments with book value approximating to fair value	4,300,000
Level 3 | Embedded derivatives - GMWB
Valuation of Level 3 Financial Instruments
Fair Value of Liabilities	182,262,000
Level 3 | Embedded derivatives - GMWB | Actuarial cash flow model | Low end of range
Unobservable Input
Lapse (as a percent)	0.00%
Utilization (as a percent)	92.00%
Non-performance risk (as a percent)	0.71%
Level 3 | Embedded derivatives - GMWB | Actuarial cash flow model | High end of range
Unobservable Input
Lapse (as a percent)	16.00%
Utilization (as a percent)	100.00%
Non-performance risk (as a percent)	1.93%
Level 3 | Embedded derivatives - GMWB | Actuarial cash flow model | Weighted Average
Unobservable Input
Mortality (as a percent)	58.00%
Level 3 | Annuity account balances
Valuation of Level 3 Financial Instruments
Fair Value of Liabilities	134,597,000
Level 3 | Annuity account balances | Actuarial cash flow model | Low end of range
Unobservable Input
Lapse (as a percent)	2.20%
Non-performance risk (as a percent)	0.71%
Expenses per policy	78
Return on assets (as a percent)	1.50%
Level 3 | Annuity account balances | Actuarial cash flow model | High end of range
Unobservable Input
Lapse (as a percent)	55.00%
Non-performance risk (as a percent)	1.93%
Expenses per policy	93
Return on assets (as a percent)	1.85%
Level 3 | Annuity account balances | Actuarial cash flow model | Weighted Average
Unobservable Input
Mortality (as a percent)	65.00%
Asset earned rate (as a percent)	5.89%
Withdrawal rate (as a percent)	2.20%
Level 3 | Asset-backed securities
Valuation of Level 3 Financial Instruments
Fair Value of Assets	584,641,000
Level 3 | Asset-backed securities | Discounted cash flow | Low end of range
Unobservable Input
Liquidity premium (as a percent)	0.55%
Paydown rate (as a percent)	7.22%
Level 3 | Asset-backed securities | Discounted cash flow | High end of range
Unobservable Input
Liquidity premium (as a percent)	1.67%
Paydown rate (as a percent)	12.46%
Level 3 | Asset-backed securities | Discounted cash flow | Weighted Average
Unobservable Input
Liquidity premium (as a percent)	1.15%
Paydown rate (as a percent)	9.52%
Level 3 | Other government securities
Valuation of Level 3 Financial Instruments
Fair Value of Assets	20,020,000
Level 3 | Other government securities | Discounted cash flow | Weighted Average
Unobservable Input
Spread over treasury (as a percent)	0.05%
Level 3 | Corporate bonds
Valuation of Level 3 Financial Instruments
Fair Value of Assets	107,254,000
Unobservable Input
Financial instruments with book value approximating to fair value	$ 65,000,000
Level 3 | Corporate bonds | Discounted cash flow | Low end of range
Unobservable Input
Spread over treasury (as a percent)	0.20%
Level 3 | Corporate bonds | Discounted cash flow | High end of range
Unobservable Input
Spread over treasury (as a percent)	4.35%
Level 3 | Corporate bonds | Discounted cash flow | Weighted Average
Unobservable Input
Spread over treasury (as a percent)	0.92%