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SUBSEQUENT EVENTS (Details) (USD $) |  |  |  |  | 1 Months Ended |  | 1 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2012 | Dec. 31, 2011 | Apr. 30, 2012 Derivative Agreements [Member] interest_rate_swaps | Apr. 30, 2012 Interest Rate Swap [Member] Cash Flow Hedging [Member] Derivative Agreements [Member] | Apr. 30, 2012 Mini Permanent Loan [Member] Amendment of Loan [Member] | Mar. 31, 2012 Construction Loans [Member] | Apr. 30, 2012 Construction Loans [Member] Amendment of Loan [Member] extension_options | Apr. 30, 2012 Construction Loans [Member] Variable Interest Rate [Member] Amendment of Loan [Member] | Apr. 30, 2012 930 Rush Street [Member] Chicago Illinois [Member] Acquisition [Member] sqft | Apr. 30, 2012 Lincoln Park Centre [Member] Chicago Illinois [Member] Fund III [Member] Acquisition [Member] sqft
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |
Square Footage of Real Estate Property (in square feet) |  |  |  |  |  |  |  |  | 2,930 | 62,700
Business Acquisition, Cost of Acquired Entity, Purchase Price |  |  |  |  |  |  |  |  | $ 20,700,000 | $ 31,500,000
Business Acquisition, Debt Assumption |  |  |  |  |  |  |  |  |  | 19,800,000
Long-term Debt | 811,700,000 | 787,910,000 |  |  | 69,600,000 |  |  |  |  |
Mortgage Loans on Real Estate, Carrying Amount of Mortgages | 77,180,000 |  |  |  |  | 5,400,000 | 56,500,000 |  |  |
Basis Spread |  |  |  |  |  |  |  | 2.25% |  |
Number of extension options (in extension options) |  |  |  |  |  |  | 2 |  |  |
Period of extension options (in years) |  |  |  |  |  |  | 1 year |  |  |
Number of interest rate swaps (in interest rate swaps) |  |  | 2 |  |  |  |  |  |  |
Notional Amount of Interest Rate Cash Flow Hedge Derivatives |  |  |  | $ 69,600,000 |  |  |  |  |  |
Derivative, Fixed Interest Rate |  |  |  | 0.70% |  |  |  |  |  |

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- Definition The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition. + 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Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph d -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. + Details
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- Definition Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date. May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any. + 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 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 7 -Section 03 -Paragraph 16 Reference 4: 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 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 + Details
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- Definition The amount of debt that an Entity assumes in acquiring a business or in consideration for an asset received in a noncash (or part noncash) acquisition. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 32 -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 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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