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Investments (Details 15) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Financing Receivable Recorded Investment Aging
Total mortgage loans	$ 2,335,115,000	$ 2,312,167,000
Mortgage Receivables Member
Financing Receivable Recorded Investment Aging
Financing Receivable Recorded Investment 30 To 59 Days Past Due	6,594,000	7,504,000
Financing Receivable Recorded Investment 60 To 89 Days Past Due	0	0
Financing Receivable Recorded Investment Equal To Greater Than 90 Days Past Due	8,342,000	16,886,000
Total past due	14,936,000	24,390,000
Financing Receivable Recorded Investment Current	2,320,179,000	2,287,777,000
Total mortgage loans	$ 2,335,115,000	$ 2,312,167,000

X

- Definition

Financing receivables that are less than 60 days past due but more than 29 days past due.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 7A

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- Definition

Financing receivables that are less than 90 days past due but more than 59 days past due.

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-Publisher FASB

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- Definition

Financing receivables that are current.

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- Definition

Financing receivables that are equal to or greater than 90 days past due.

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-Publisher FASB

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-Topic 310

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- Definition

Recorded Investment in financing receivables that are past due at the balance sheet date.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

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Reflects the sum of the gross carrying amounts of unpaid loans issued to businesses to acquire, develop, construct, improve, or refinance land or a building. Includes [but is not limited to] commercial mortgage loans, which are secured by a [legal] security interest in real property [commercial building or business real property] which thereby serves as collateral securing repayment of the loan; and construction financing, which is an obligation generally in the form of a [promissory] note, used for the funding of construction projects.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Name Audit and Accounting Guide (AAG)

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