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Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2013 | Dec. 31, 2012
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Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Interest rate swap asset | $ 3,912 |  |  |
Interest rate swap liability |  |  | (6,556) |
Fair Value, Measurements, Recurring [Member] | Fair Value Measurements Using Level 1 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Interest rate swap asset | 0 |  |  |
Interest rate swap liability |  |  | 0 |
Fair Value, Measurements, Recurring [Member] | Fair Value Measurements Using Level 2 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Interest rate swap asset | 3,912 |  |  |
Interest rate swap liability |  |  | (6,556) |
Fair Value, Measurements, Recurring [Member] | Fair Value Measurements Using Level 3 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Interest rate swap asset | 0 |  |  |
Interest rate swap liability |  |  | 0 |
Fair Value, Measurements, Nonrecurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Impaired real estate assets | 4,277 | [1] | 3,327 | [1]
Fair Value, Measurements, Nonrecurring [Member] | Fair Value Measurements Using Level 1 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Impaired real estate assets | 0 | [1] | 0 | [1]
Fair Value, Measurements, Nonrecurring [Member] | Fair Value Measurements Using Level 2 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Impaired real estate assets | 0 | [1] | 0 | [1]
Fair Value, Measurements, Nonrecurring [Member] | Fair Value Measurements Using Level 3 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Impaired real estate assets | $ 4,277 | [1] | $ 3,327 | [1]
[1] | Represents a non-recurring fair value measurement.

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- Definition Impaired Real Estate Assets Fair Value Disclosure + References No definition available. + Details
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Balance Type: | debit
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- Details
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Data Type: | xbrli:stringItemType
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- Definition Fair value as of the balance sheet date of interest rate derivative assets, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13433-108611 + Details
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- Definition Fair value as of the balance sheet date of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13433-108611 + Details
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