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Mortgage Loans Payable And Unsecured Credit Facilities (Summary Of The Derivative Financial Instruments Held) (Details) - Accounts Payable And Accrued Liabilities [Member]	12 Months Ended
	Dec. 31, 2015 USD ($) contract	Dec. 31, 2014 USD ($) contract
Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Count | contract	4	2
Notional values	$ 250,000,000	$ 150,000,000
Fair value	$ 3,945,000	$ 2,777,000
Interest Rate Swap One [Member]
Derivatives, Fair Value [Line Items]
Maturity date		2019
Interest Rate Swap Two [Member]
Derivatives, Fair Value [Line Items]
Maturity date		2021
Minimum [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Maturity date	2019
Maximum [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Maturity date	2022

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+ References

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- Definition

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6519104

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
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-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5579245-113959

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Fair value as of the balance sheet date of all interest rate derivative liabilities designated as cash flow hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
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-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624163-113959

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Number of interest rate derivative instruments held by the entity at the reporting date.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5580258-113959

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-Name Accounting Standards Codification
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-Paragraph 1A
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-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5579245-113959

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