Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
ASSETS
Tenant and other receivables, allowance for doubtful accounts (in US dollars)	$ 11,908	$ 12,210
Receivable arising from the straight-lining of rents, allowance (in US dollars)	2,751	3,188
Deferred leasing costs, accumulated amortization (in US dollars)	218,239	212,339
Identified intangible assets, accumulated amortization (in US dollars)	$ 187,360	$ 199,821
Capital Unit Class A [Member]
LIABILITIES, REDEEMABLE PARTNERSHIP UNITS AND EQUITY
Redeemable partnership units outstanding	12,242,820	11,356,550
Series D Cumulative Redeemable Preferred Unit [Member]
LIABILITIES, REDEEMABLE PARTNERSHIP UNITS AND EQUITY
Redeemable partnership units outstanding	177,101	1

The valuation allowance as of the balance sheet date to reduce the gross amount of receivables to estimated net realizable value, which would be presented in parentheses on the face of the balance sheet.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5074-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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The number of securities classified as temporary equity that have been issued and are held by the entity's shareholders. Securities outstanding equals securities issued minus securities held in treasury. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
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The valuation allowance as of the balance sheet date to reduce the gross amount of straight-line rent receivables receivables to estimated net realizable value, which would be presented in parentheses on the face of the balance sheet

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