No definition available.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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No definition available.

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The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

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No definition available.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(2))

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Fair value of securitized, pay-through debt securities collateralized by real estate mortgage loans classified as held-to-maturity.

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Mortgage-Backed Securities

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- Definition

Amount of debt for which creditor does not have general recourse to the debtor but rather has recourse only to the property used for collateral in the transaction or other specific property.

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No definition available.

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- Definition

The number of real estate properties owned as of the balance sheet date.

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No definition available.

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The cash inflow from a borrowing with the highest claim on the assets of the entity in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle, if longer).

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

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-Section 45

-Paragraph 14

-Subparagraph (b)

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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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-Publisher FASB

-Name Accounting Standards Codification

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The cash outflow to repay long-term debt that is wholly or partially secured by collateral. Excludes repayments of tax exempt secured debt.

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The cash outflow to repay long-term debt that is not secured by collateral. Excludes repayments of tax exempt unsecured debt.

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-Publisher FASB

-Name Accounting Standards Codification

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.17)

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Including the current and noncurrent portions, carrying value as of the balance sheet date of uncollateralized debt obligations (with maturities initially due after one year or beyond the operating cycle if longer).

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-Topic 942

-SubTopic 210

-Section S99

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-Subparagraph (SX 210.9-03.16)

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-Subparagraph (SX 210.7-03.16)

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Article 5

-Subsection 19, 20, 22

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Notes and Mortgages Payable (Details) $ in Thousands	1 Months Ended		6 Months Ended
Notes and Mortgages Payable (Details) $ in Thousands	Mar. 31, 2015 USD ($)	Jan. 31, 2015 USD ($)	Jun. 30, 2015 USD ($) properties	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($) properties
Notes and mortgages payable (Textual)
Senior unsecured notes repaid			$ 500,000	$ 294,570
Number of operating properties \| properties			282		337
Operating Properties [Member]
Notes and mortgages payable (Textual)
Number of operating properties \| properties			34
Notes Payable [Member]
Notes and mortgages payable (Textual)
Unamortized debt issuance costs			$ 27,200		$ 20,400
Mortgages Payable [Member]
Notes and mortgages payable (Textual)
Unamortized debt issuance costs			3,400		$ 3,900
Repayment of mortgage debt			308,900
Non-recourse mortgage debt			680,400
Fair value debt adjustments, mortgages			$ 21,600
Number of operating properties \| properties			34
Term Loan [Member]
Notes and mortgages payable (Textual)
Unsecured term loan		$ 650,000
Debt instrument, interest rate			1.13%
Repayment of term loan amount			$ 400,000
Maturity date		Jan. 31, 2017
Description of accrued interest at spread to LIBOR		Accrues interest at a spread (currently 95 basis points) to LIBOR.
Senior Notes [Member]
Notes and mortgages payable (Textual)
Unsecured term loan			$ 350,000
Debt instrument, interest rate	4.25%		4.904%
Maturity date	Apr. 30, 2045
Senior unsecured notes, term	30 years
Proceeds from issuance of senior long-term debt	$ 342,700
Senior unsecured notes repaid			$ 100,000