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Investments in Real Estate and Real Estate Under Construction Summary of acquisitions and build-to-suit transactions (Details) (USD $) | 6 Months Ended |
--- | --- | ---
Jun. 30, 2013 sqft | Jun. 30, 2012 | Dec. 31, 2012
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | $ 166,468,000 |  |
Land | 20,055,000 |  |
Building and Improvements | 132,401,000 |  |
Lease in-place Value | 14,012,000 |  |
Aggregate aquisition expenses | 250,000 | 380,000 |
Square Feet | 1,163,000 |  |
Expected Maximum Commitment/Contribution | 98,600,000 |  |
Development in Process | 23,099,000 |  | 65,122,000
Long Island City New York [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Real Estate Investments, Invested Capital Threshold for Distribution | 25,000,000 |  |
Industrial Property [Member] | Long Island City New York [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | 42,124,000 |  |
Land | 0 |  |
Building and Improvements | 42,124,000 |  |
Lease in-place Value | 0 |  |
Industrial Property [Member] | Houston, Texas [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | 81,400,000 |  |
Land | 15,055,000 |  |
Building and Improvements | 57,949,000 |  |
Lease in-place Value | 8,396,000 |  |
Office Property [Member] | Denver Colorado [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | 34,547,000 |  |
Land | 2,207,000 |  |
Building and Improvements | 26,724,000 |  |
Lease in-place Value | 5,616,000 |  |
Business Combination, Additional Consideration Transferred | 3,825,000 |  |
Retail Property [Member] | Tuscaloosa Alabama [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | 8,397,000 |  |
Land | 2,793,000 |  |
Building and Improvements | 5,604,000 |  |
Lease in-place Value | 0 |  |
Payments for Leasing Costs | $ 323,000 |  |
Up to $25,000 [Member] | Long Island City New York [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Real Estate Investments, Distribution Percentage | 6.30% |  |
In excess of $25,000 [Member] | Long Island City New York [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Real Estate Investments, Distribution Percentage | 11.00% |  |
Any Excess Return [Member] | Long Island City New York [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Real Estate Investments, Distribution Percentage | 50.00% |  |

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- Definition Construction Commitment Maximum Amount + References No definition available. + Details
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- Definition Real Estate Investments, Distribution Percentage + References No definition available. + Details
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- Definition Real Estate Investments, Invested Capital Threshold for Distribution + References No definition available. + Details
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- Definition Area of a real estate property. + References No definition available. + Details
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=21917927&loc=d3e1043-128460 + Details
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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: 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 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 Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479 + Details
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- Definition The current amount of expenditures for a real estate project that has not yet been completed. + 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 210.7-03.10) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition This element represents the amount of value allocated by a lessor (acquirer) to lease agreements which exist at acquisition of a leased property. Such amount may include the value assigned to existing tenant relationships and excludes the market adjustment component of the value assigned for above or below-market leases acquired. + References No definition available. + Details
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- Definition Aggregate of the carrying amounts as of the balance sheet date of investments in building and building improvements. + 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 Amount before accumulated depletion of real estate held for productive use, excluding land held for sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 4 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6812-107765 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 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of cash outflow for costs that are essential to originate the lease and would not otherwise have been incurred without the lease agreement. Amount includes, but is not limited to, cash outflows to evaluate the lessee's credit condition, guarantees, and collateral and cash outflows for costs incurred in negotiating, processing, and executing the lease agreement. + References No definition available. + Details
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