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Mortgage Loans on Real Estate Schedule of Mortgage Loans on Real Estate, Amortized Cost and Carrying Value (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Mortgage Loans on Real Estate [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	$ 2,600,000,000	$ 2,800,000,000
Allowance for Notes, Loans and Financing Receivable	(10,969,000)	(10,360,000)
Mortgage loans on real estate	2,623,940,000	2,823,047,000
Loans and Leases Receivable, Commercial, Loans in Process	37,900,000
Commercial Real Estate Portfolio Segment [Member]
Mortgage Loans on Real Estate [Line Items]
Loans Receivable, Gross, Commercial, Real Estate	2,658,883,000	2,856,011,000
Allowance for Notes, Loans and Financing Receivable	34,234,000	32,964,000
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums, Commercial	(709,000)	0
Mortgage loans on real estate	$ 2,623,940,000	$ 2,823,047,000

X

- Definition

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

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-Name Accounting Standards Codification

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-SubTopic 10

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- Definition

The undisbursed portion of the commercial loan receivable balance (loans in process) which is deducted separately from total loans.

+ References

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-Publisher OTS

-Name Federal Regulation (FR)

-Number Title 12

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-Subparagraph g

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- Definition

Amount before allowance of commercial loans issued to businesses to acquire, develop, construct, improve, or refinance land or building. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans covered under loss sharing agreements.

+ References

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-Name Regulation S-X (SX)

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-Subparagraph a

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-Name Audit and Accounting Guide (AAG)

-Number AAG-DEP

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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.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-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.



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Reflects the cumulative amount of fees paid by commercial borrowers which have not yet been taken into income and unamortized costs incurred to originate commercial loans and leases, unamortized commercial loan commitments and commercial loan syndication fees, and premiums over or discounts from face amounts of commercial loans that are being amortized into income as an adjustment to yield.

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