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Loans Receivable and Other Lending Investments, net (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2014
Troubled debt restructurings
Carrying value of loans sold	$ 38.3
Realized investment gains (losses)	(0.6)
Unfunded commitments, troubled debt restructurings		6.7
Performing senior mortgages
Troubled debt restructurings
Number of loans	1
Repayment of debt
Troubled debt restructurings
Recorded investment of loans whose maturity was extended	13.3
Non-performing senior mortgages
Troubled debt restructurings
Financing receivable modifications recorded investment of contracts whose maturity extended and reduced principal	$ 72.7

X

- Definition

The number of financing receivables that have been modified by troubled debt restructurings.

+ References

No definition available.

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X

- Definition

Represents the amount of the outstanding recorded investment related to financing receivables for which the maturity was extended and that has been modified by troubled debt restructurings.

+ References

No definition available.

+ Details

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Balance Type:	debit
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X

- Definition

Recorded investment of financing Receivable whose maturity was extended and principal was reduced

+ References

No definition available.

+ Details

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X

- Definition

Represents the amount of the outstanding unfunded commitment related to financing receivables that has been modified by troubled debt restructurings.

+ References

No definition available.

+ Details

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X

- Definition

Represents the carrying value of loans sold during the period.

+ References

No definition available.

+ Details

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X

- Definition

The net realized gains or losses on investments during the period, not including gains or losses on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-04.3(a))

-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 325

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6485959&loc=d3e22529-158502



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 3

-Subparagraph a

-Article 7

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