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Summary of Significant Accounting Policies (Fair Value Measurements) (Details) (Interest Rate Swap [Member], Recurring [Member], USD $) In Thousands, unless otherwise specified | Sep. 30, 2012 | Dec. 31, 2011
--- | --- | ---
Liabilities: |  |
Interest Rate Swaps | $ 18,741 | $ 3,886
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
Liabilities: |  |
Interest Rate Swaps | 0 | 0
Significant Other Observable Inputs (Level 2) [Member] |  |
Liabilities: |  |
Interest Rate Swaps | 18,741 | 3,886
Unobservable Inputs (Level 3) [Member] |  |
Liabilities: |  |
Interest Rate Swaps | $ 0 | $ 0

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- Details
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Balance Type: | na
Period Type: | duration

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- Definition This element represents the aggregate of the liabilities reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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