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Investment in Real Estate - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |  |  | 3 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended |  | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2012 Parcels Property sqft | Dec. 31, 2011 sqft Parcels Property | Dec. 31, 2010 Property Parcels sqft | Sep. 20, 2011 sqft | Dec. 31, 2012 Mortgage Loans on Real Estate [Member] | Mar. 31, 2010 Grand Rapids Property [Member] sqft | Dec. 31, 2012 Discontinuing operations [Member] | Dec. 31, 2011 Discontinuing operations [Member] | Dec. 31, 2010 Discontinuing operations [Member] | May 26, 2012 2003 Net Lease Joint Venture [Member] Property | Feb. 13, 2012 2003 Net Lease Joint Venture [Member] Property | Dec. 31, 2012 2003 Net Lease Joint Venture [Member] Property | Dec. 31, 2011 2003 Net Lease Joint Venture [Member] Property | May 26, 2011 2003 Net Lease Joint Venture [Member] | Dec. 31, 2010 Former Joint Venture Partner [Member] Property
Real Estate Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of industrial properties acquired | 1 | 1 | 3 |  |  |  |  |  |  | 1 | 1 | 1 | 1 |  | 1
Gross leasable area (GLA) of industrial properties acquired | 400,000 | 700,000 | 500,000 |  |  |  |  |  |  |  |  |  |  |  |
Purchase price of industrial properties | $ 21,819 | $ 30,625 | $ 22,408 |  |  |  |  |  |  |  |  |  |  |  |
Equity Interest Acquired |  |  |  |  |  |  |  |  |  |  | 85.00% | 85.00% | 85.00% | 85.00% |
Carrying value of mortgage loan assumed from acquisition | 12,026 | 24,417 |  |  |  |  |  |  |  |  |  |  |  |  |
Cash payment of acquisition | 8,324 | 5,277 |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of consideration paid of net fair value of acquisition | 85.00% | 85.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Approximate gain due to the difference between carrying value and fair value of acquisition | 776 | 689 |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price of land parcels | 46,695 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capitalization rate used for calculating estimated fair value of industrial properties acquired | 7.30% | 8.40% |  |  |  |  |  |  |  |  |  |  |  |  |
Number of industrial properties sold | 28 | 36 | 13 |  |  |  |  |  |  |  |  |  |  |  |
Gross leasable area (GLA) of industrial properties sold | 4,200,000 | 2,900,000 | 1,100,000 |  |  |  |  |  |  |  |  |  |  |  |
Gross proceeds from the sale of industrial properties and land parcel | 85,561 | 86,643 | 71,019 |  |  |  |  |  |  |  |  |  |  |  |
Gain on sale of real estate | 16,442 | 21,789 | 11,951 |  |  |  | 12,665 | 20,419 | 11,092 |  |  |  |  |  |
Number of land parcels sold | 1 | 1 | 1 |  |  |  |  |  |  |  |  |  |  |  |
Gross leasable area (GLA) of industrial property transferred to lender |  | 400,000 |  | 400,000 |  |  |  |  |  |  |  |  |  |  |
Number of industrial properties transferred to lender |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of industrial properties held for sale | 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross leasable area (GLA) of industrial properties held for sale | 400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notes receivable outstanding | 41,201 | 55,502 |  |  | 7,660 |  |  |  |  |  |  |  |  |  |
Net discount of notes receivable outstanding | 255 | 319 |  |  | 255 |  |  |  |  |  |  |  |  |  |
Fair value of notes receivable | 44,783 | 58,734 |  |  |  |  |  |  |  |  |  |  |  |  |
Carrying value of mortgage loan receivable | 7,405 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of industrial properties with mortgage loan receivable with bankrupt tenant | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of Real Estate | $ 1,246 | $ (2,661) | $ 185,397 |  |  | $ 9,155 |  |  |  |  |  |  |  |  |
Gross leasable area (GLA) of impaired industrial property |  |  |  |  |  | 300,000 |  |  |  |  |  |  |  |  |

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- Definition In a Business combination, this element represents the amount of gain/loss recognized by the entity as a result of the change in control of the underlying real estate asset. This transaction was accounted for as a step acquisition utilizing the purchase method of accounting. + References No definition available. + Details
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- Definition Gross proceeds from the sale of industrial properties . + References No definition available. + Details
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- Definition Number of industrial properties acquired. + References No definition available. + Details
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- Definition Number of Industrial Properties Held for Sale. + References No definition available. + Details
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- Definition Number of industrial properties sold. + References No definition available. + Details
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- Definition Number of Industrial Properties Transferred to Lender. + References No definition available. + Details
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- Definition Number Of Industrial Properties With Mortgage Loan Receivable With Bankrupt Tenant + References No definition available. + Details
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- Definition Number of land parcels sold. + References No definition available. + Details
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- Definition Percentage of consideration paid of net fair value of acquisition. + References No definition available. + Details
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- Definition Purchase Price of Industrial Properties. + References No definition available. + Details
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- Details
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- Definition Gross leasable area (GLA) of impaired industrial property + References No definition available. + Details
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- Definition Square Footage of Industrial Properties Held for Sale. + References No definition available. + Details
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- Definition Square footage of industrial properties sold. + References No definition available. + Details
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- Definition Square Footage Of Industrial Property Transferred To Lender. + References No definition available. + Details
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- Definition Square Footage of Real Estate Properties Acquired. + References No definition available. + Details
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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 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. Reference 2: 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. + 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 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. 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 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 5: 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 6: 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 + Details
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- Definition Amount of acquisition cost of a business combination allocated to land included in real estate. + References No definition available. + 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 Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 2: 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. + 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 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Subparagraph b -Article 5 + Details
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- Definition 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. 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. Excludes amounts related to receivables held-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10(3)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 10 -Subparagraph 3 -Article 9 + Details
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- Definition Net amount of the 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, credit card receivables, notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. Excludes trade accounts receivable with contractual maturity of one year or less and arose from the sale of goods or services. + References Reference 1: 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Article 5 + 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 FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399 Reference 2: 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. + Details
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