MORTGAGE LOANS (Details) (USD $)	6 Months Ended	12 Months Ended
Jun. 30, 2011	Dec. 31, 2010
MORTGAGE LOANS
Mortgage loans holdings	$ 5,349,851,000	$ 4,892,829,000
Commercial mortgage loans
Mortgage loans
Period for average credit loss factor (in years)	10
Average credit loss factor for commercial mortgage loan portfolio over past ten years (as a percent)	0.02%
Delinquent mortgage loans, foreclosed properties and restructured loans pursuant to pooling and servicing agreement	20,200,000
Maximum delinquent mortgage loans, foreclosed properties and restructured loans to invested assets (as a percent)	0.10%
Number of loan categories	2
Nonperforming loans not subject to a pooling and servicing agreement	22,500,000
Percentage of loans not subject to a pooling and servicing agreement to mortgage loan portfolio (as a percent)	0.40%
Loans subject to a pooling and servicing agreement which are either nonperforming or restructured	19,700,000
Percentage of loans subject to a pooling and servicing agreement that are nonperforming or restructured (as a percent)	0.40%
Change in the allowance for credit losses
Beginning balance	11,650,000	1,725,000
Charge offs	(9,358,000)	(1,146,000)
Recoveries	(2,386,000)
Provision	7,694,000	11,071,000
Ending balance	$ 7,600,000	$ 11,650,000

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Represents the amount of delinquent loans, foreclosed properties, and restructured loans pursuant to a pooling and servicing agreement.

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- Definition

Represents the prior period over which the average credit loss factor for a portfolio of financing receivables is calculated.

+ Details

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- Definition

Represents the percentage of average credit losses for the portfolio of financing receivables over the prior ten years.

+ Details

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- Definition

Represents the maximum amount of delinquent mortgage loans, foreclosed properties and restructured loans pursuant to a pooling and servicing agreement, as a percent of invested assets.

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- Definition

Represents the number of categories of loans.

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- Definition

Represents the amount of financing receivables not subject to a pooling and servicing agreement that are nonperforming.

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- Definition

Represents the percent of financing receivables not subject to a pooling and servicing agreement that are nonperforming.

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- Definition

Represents the amount of financing receivables subject to a pooling and servicing agreement that are nonperforming or have been restructured under the terms and conditions of the pooling and service agreement.

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- Definition

Represents the percent of financing receivables subject to a pooling and servicing agreement that are nonperforming or have been restructured under the terms and conditions of the pooling and service agreement.

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- Definition

A valuation allowance for financing receivables that are expected to be uncollectible.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-URI http://asc.fasb.org/extlink&oid=6965416&loc=SL6953423-111524
-Subparagraph (c)(1)

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Charge to expense for financing receivables that are expected to be uncollectible.

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- Definition

Reduction to the allowance for credit losses related to collections on financing receivables which have been partially or fully charged off as bad debts.

+ References

+ Details

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Reduction to the allowance for credit losses related to financing receivables deemed uncollectible.

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- Definition

The balance represents the amount of loans that are secured by real estate mortgages, offset by the reserve to cover probable credit losses on the loan portfolio.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 60
-Paragraph 47
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 7
-Section 03
-Paragraph 1
-Subparagraph c

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.1(c))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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