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Investment In Real Estate (Details Textual) (USD $) In Thousands, unless otherwise specified | 2 Months Ended | 12 Months Ended |  | 3 Months Ended | 12 Months Ended |
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Feb. 28, 2012 sqft acre IndustrialProperty | Dec. 31, 2011 sqft acre IndustrialProperty | Dec. 31, 2010 sqft IndustrialProperty | Dec. 31, 2009 sqft IndustrialProperty | Oct. 22, 2010 IndustrialProperty acre | Mar. 31, 2010 Grand Rapids Property [Member] sqft | Dec. 31, 2009 Inland Empire [Member] | Dec. 31, 2011 Discontinued Operations [Member] | Dec. 31, 2010 Discontinued Operations [Member] | Dec. 31, 2009 Discontinued Operations [Member] | Dec. 31, 2011 2003 Net Lease Joint Venture [Member] sqft IndustrialProperty | May 26, 2011 2003 Net Lease Joint Venture [Member]
Additional Investment in Real Estate (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage purchased | 85.00% | 85.00% |  |  |  |  |  |  |  |  |  | 85.00%
Interest on purchase of equity in property |  |  |  |  |  |  |  |  |  |  | 15.00% |
Investments In Real Estate (Additional Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Discounted operations on the sale of real estate |  | $ 21,789 | $ 11,951 | $ 24,580 |  |  |  | $ 20,419 | $ 11,092 | $ 24,206 |  |
Impairment of Real Estate |  | 2,661 | (194,552) | (6,934) |  | (9,155) | (6,934) |  |  |  |  |
Gross Leasable Area (GLA) of industrial property owned | 400,000 | 66,300,000 |  |  |  | 300,000 | 200,000 |  |  |  | 3,400,000 |
Investment in Real Estate (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Purchase price of industrial property |  | 30,625 | 22,408 | 208 |  |  |  |  |  |  |  |
Number of industrial properties acquired |  | 1 | 3 | 2 |  |  |  |  |  |  |  |
Square Footage Of Real Estate Property Acquired |  | 700,000 | 500,000 | 1,100,000 |  |  |  |  |  |  |  |
Square Footage Of Real Estate Property Sold |  | 2,900,000 | 1,100,000 | 1,900,000 |  |  |  |  |  |  |  |
Approximate cost of GLA |  |  |  | 41,258 |  |  |  |  |  |  |  |
Carrying value of mortgage loan for funding of acquisition |  | 24,417 |  |  |  |  |  |  |  |  |  |
Cash Acquired from Acquisition | 8,324 | 5,277 |  |  |  |  |  |  |  |  |  |
Percentage of consideration paid of net fair value of acquisition |  | 85.00% |  |  |  |  |  |  |  |  |  |
Approximate gain due to the difference between carrying value and fair value of acquisition |  | 689 |  |  |  |  |  |  |  |  |  |
Number of industrial properties Sold |  | 36 | 13 | 15 |  |  |  |  |  |  |  |
Gross proceed from the sale of industrial properties |  | 86,643 | 71,019 | 100,194 |  |  |  |  |  |  |  |
Gain on Sale of Real Estate |  | 21,789 | 11,951 | 24,580 |  |  |  | 20,419 | 11,092 | 24,206 |  |
GLA of Industrial Property transferred to lender |  | 400,000 |  |  |  |  |  |  |  |  |  |
Number of industrial properties |  | 740 |  |  |  |  |  |  |  |  | 7 |
Square Footage Of Real Estate Property Held For Sale |  | 4,800,000 |  |  |  |  |  |  |  |  |  |
Number of operations of industrial properties held for sale |  | 46 |  |  |  |  |  |  |  |  |  |
Notes receivable outstanding |  | 55,502 | 58,803 |  |  |  |  |  |  |  |  |
Net discount of notes receivable outstanding |  | 319 | 383 |  |  |  |  |  |  |  |  |
Fair value of notes receivable |  | 58,734 | 60,944 |  |  |  |  |  |  |  |  |
Number of industrial properties Non Strategic Assets Held For Sale |  | 46 |  |  | 195 |  |  |  |  |  |  |
Gross Area of Land Parcels Non Strategic Assets Held for Sale |  | 61 |  |  | 724 |  |  |  |  |  |  |
Number of industrial properties Non Strategic Assets Other |  | 133 |  |  |  |  |  |  |  |  |  |
Gross Area of Land Parcels Non Strategic Assets Other |  | 359 |  |  |  |  |  |  |  |  |  |
Square Footage of Real Estate Property Non Strategic Assets Held for Sale |  | 4,800,000 | 16,400,000 |  |  |  |  |  |  |  |  |
Square Footage of Real Estate Property Non Strategic Assets Other |  | 11,300,000 |  |  |  |  |  |  |  |  |  |
Impairment Of Real Estates Non Strategic Assets Held For Sale |  |  | 185,397 |  |  |  |  |  |  |  |  |
Impairment reversal of industrial properties and land parcels |  | $ 9,678 |  |  |  |  |  |  |  |  |  |

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- Definition Amount of cash paid to acquire the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph d -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 Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 68 -Subparagraph f(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. + Details
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- Definition Fair Value of the liabilities incurred by the acquirer to former owners of the acquiree, including the fair value of any contingent consideration. If liabilities transferred as consideration remain within the combined entity after the business combination (for example, because the assets or liabilities were transferred to the acquiree rather than to its former owners), and the acquirer therefore retains control of them; in that situation, the acquirer measures those liabilities at their carrying amounts immediately before the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6405-128476 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph d -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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 39, 40, 41 -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 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 68 -Subparagraph f(3) -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. + Details
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- Definition The amount of acquisition cost of a business combination allocated to land and building to be used in the normal course of business, not including assets that are held-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph e -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 Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 37 -Subparagraph d -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. + Details
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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 159 -Paragraph 18 -Subparagraph f -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 AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 20 -Subparagraph a (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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 + Details
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- Definition The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -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 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 + Details
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- Definition Amount of the excess of the fair value of acquired net assets over the cost of an acquired business after pro rata reduction of the amounts that otherwise would have been assigned to acquired assets except financial assets other than investments accounted for by the equity method, assets to be disposed of by sale, deferred tax assets, prepaid assets relating to pension and postretirement benefit plans, and other current assets. This amount is considered an extraordinary item and often referred to as negative goodwill. This element is gross of the related tax effect. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 44, 45, 46 -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. + Details
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- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. An amount representing an agreement for an unconditional promise by the maker to pay the Company (holder) a definite sum of money at a future date(s). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Subparagraph b -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition For an unclassified balance sheet, an amount representing an agreement for an unconditional promise by the maker to pay the Entity (holder) a definite sum of money at a future date, net of any write-downs taken for collection uncertainty on the part of the holder. Such amount may include accrued interest receivable in accordance with the terms of the note. The note also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. This amount does not include amounts related to receivables held-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Represents a total which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(d)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition Disclosure of the unamortized amount of the discount on the note or receivable which is deducted from the face amount of the receivable or loan. The discount or premium is the difference between the present value and the face amount. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 21 -Paragraph 16 -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 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399 + Details
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