Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Consolidated Balance Sheets
Accounts receivable, allowance	$ 3,802	$ 2,945
Straight-line rent receivable, allowance	7,924	7,260
Deferred financing costs, accumulated amortization	52,844	46,407
Deferred leasing and other costs, accumulated amortization	$ 313,986	$ 269,000
Common equity, General Partner Units issued	252,663	252,195
Common equity, General Partner Units outstanding	252,663	252,195
Preferred equity, issued	3,610	3,618
Preferred equity, outstanding	3,610	3,618
Limited Partner Units, issued	7,190	5,231
Limited Partner Units, outstanding	7,190	5,231

For an unclassified balance sheet, the accumulated amortization, as of the reporting date, which represents the periodic charge to earnings of initial direct costs which have been deferred and are being allocated over the lease term in proportion to the recognition of rental income.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 13
-Paragraph 19
-Subparagraph c
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 25
-Paragraph 16
-URI http://asc.fasb.org/extlink&oid=6748888&loc=d3e40588-112709

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 35
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6453741&loc=d3e40879-112712

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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