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Disclosure About Fair Value of Financial Instruments (Details) (USD $) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2011 | Jun. 30, 2010 | Jun. 30, 2011 | Jun. 30, 2010 | Dec. 31, 2010
Assets [Abstract] |  |  |  |  |
Marketable securities of non-qualified deferred compensation plan (in prepaid expenses and other assets) | $ 3,876,000 |  | $ 3,876,000 |  | $ 3,479,000
Tax increment financing bond (in prepaid expenses and other assets) | 15,228,000 |  | 15,228,000 |  | 15,699,000
Total Assets | 19,104,000 |  | 19,104,000 |  | 19,178,000
Noncontrolling Interests in the Operating Partnership | 125,075,000 |  | 125,075,000 |  | 120,838,000
Liability [Abstract] |  |  |  |  |
Non-qualified deferred compensation obligation (in accounts payable, accrued expenses and other liabilities) | 3,876,000 |  | 3,876,000 |  | 4,091,000
Tax increment financing bond [Abstract] |  |  |  |  |
Unrealized gain/(loss) (in AOCL) | (336,000) | (73,000) | (471,000) | 146,000 |
Amount by which outstanding principal amount exceeds estimated fair value | 3,013,000 |  | 3,013,000 |  | 2,543,000
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Mortgages and notes receivable | 18,809,000 |  | 18,809,000 |  | 19,044,000
Mortgages and notes payable | 1,615,068,000 |  | 1,615,068,000 |  | 1,522,945,000
Financing obligations | 32,869,000 |  | 32,869,000 |  | 33,114,000
Level 1 [Member] |  |  |  |  |
Assets [Abstract] |  |  |  |  |
Marketable securities of non-qualified deferred compensation plan (in prepaid expenses and other assets) | 3,876,000 |  | 3,876,000 |  | 3,479,000
Tax increment financing bond (in prepaid expenses and other assets) | 0 |  | 0 |  | 0
Total Assets | 3,876,000 |  | 3,876,000 |  | 3,479,000
Noncontrolling Interests in the Operating Partnership | 125,075,000 |  | 125,075,000 |  | 120,838,000
Liability [Abstract] |  |  |  |  |
Non-qualified deferred compensation obligation (in accounts payable, accrued expenses and other liabilities) | 3,876,000 |  | 3,876,000 |  | 4,091,000
Level 3 [Member] |  |  |  |  |
Assets [Abstract] |  |  |  |  |
Marketable securities of non-qualified deferred compensation plan (in prepaid expenses and other assets) | 0 |  | 0 |  | 0
Tax increment financing bond (in prepaid expenses and other assets) | 15,228,000 |  | 15,228,000 |  | 15,699,000
Total Assets | 15,228,000 |  | 15,228,000 |  | 15,699,000
Noncontrolling Interests in the Operating Partnership | 0 |  | 0 |  | 0
Liability [Abstract] |  |  |  |  |
Non-qualified deferred compensation obligation (in accounts payable, accrued expenses and other liabilities) | 0 |  | 0 |  | 0
Tax Increment Financing Bond [Member] |  |  |  |  |
Tax increment financing bond [Abstract] |  |  |  |  |
Beginning balance | 15,564,000 | 17,090,000 | 15,699,000 | 16,871,000 |
Unrealized gain/(loss) (in AOCL) | (336,000) | (73,000) | (471,000) | 146,000 |
Ending balance | 15,228,000 | 17,017,000 | 15,228,000 | 17,017,000 |
Amount by which outstanding principal amount exceeds estimated fair value | 3,000,000 |  | 3,000,000 |  |
Maturity date |  |  | Dec. 01, 2020 |  |
Decrease in fair value of bond if yield-to-maturity was 100 basis points higher | 600,000 |  | 600,000 |  |
Increase in fair value of bond if yield-to-maturity was 100 basis points lower | 600,000 |  | 600,000 |  |
Fair value [Member] |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Mortgages and notes receivable | 19,141,000 |  | 19,141,000 |  | 19,093,000
Mortgages and notes payable | 1,725,186,000 |  | 1,725,186,000 |  | 1,581,518,000
Financing obligations | 20,852,000 |  | 20,852,000 |  | 23,880,000
Carrying value [Member] |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |
Mortgages and notes receivable | 18,809,000 |  | 18,809,000 |  | 19,044,000
Mortgages and notes payable | 1,615,068,000 |  | 1,615,068,000 |  | 1,522,945,000
Financing obligations | $ 32,869,000 |  | $ 32,869,000 |  | $ 33,114,000

X
- Definition The amount by which the fair value of the tax increment financing bond would increase if the yield-to-maturity were 100 basis points lower as of the balance sheet date. + Details
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- Definition The amount by which the fair value of the tax increment financing bond would decrease if the yield-to-maturity were 100 basis points higher as of the balance sheet date. + Details
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- Definition Carrying value as of balance sheet date of obligations incurred as part of real estate transactions that are, in substance, a financing arrangement rather than a sale. + Details
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- Definition Represents the portion of the balance sheet assertion valued at fair value by the entity in connection with the fair value disclosures required in the footnotes to the financial statements. This item represents assets held under deferred compensation agreements. + Details
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- Definition Represents the portion of the balance sheet assertion valued at fair value by the entity in connection with the fair value disclosures required in the footnotes to the financial statements. This item represents issued and outstanding stock which is not included within permanent equity in Stockholders Equity. + Details
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- Definition Represents the portion of the balance sheet assertion valued at fair value by the entity in connection with the fair value disclosures required in the footnotes to the financial statements. This item represents currently earned compensation under compensation arrangements that is not actually paid until a later date. + Details
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- Definition Represents the portion of the balance sheet assertion valued at fair value by the entity in connection with the fair value disclosures required in the footnotes to the financial statements. This item represents tax increment financing bonds. + Details
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- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + Details
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- Definition The net amount of gross unrealized gains (losses) for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (d) -SubTopic 10 -Topic 320 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27357-111563 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + Details
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- Definition This element represents total gains or losses for the period (realized and unrealized), arising from assets measured at fair value on a recurring basis using unobservable inputs (Level 3), which are included in other comprehensive income (a separate component of shareholders' equity). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph c(1) -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 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19207-110258 + Details
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- Definition This element represents an asset measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -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 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6925170&loc=d3e19207-110258 + Details
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- Definition The amount of the recorded investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, accounts receivable (with terms exceeding one year), notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Receivable -URI http://asc.fasb.org/extlink&oid=6953735 + Details
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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of all notes and loans payable (with maturities initially due after one year or beyond the operating cycle if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 7 -Section 03 -Paragraph 16 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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