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Fair Value Disclosure of Financial Instruments (Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
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Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |
Derivative financial instruments, Asset | $ 6 | $ 78
Derivative financial instruments, Liability | 10,358 | 13,392
Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |
Derivative financial instruments, Asset | 0 | 0
Derivative financial instruments, Liability | 0 | 0
Significant Other Observable Inputs (Level 2) |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |
Derivative financial instruments, Asset | 6 | 78
Derivative financial instruments, Liability | 10,358 | 13,392
Significant Unobservable Inputs (Level 3) |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions |  |
Derivative financial instruments, Asset | 0 | 0
Derivative financial instruments, Liability | $ 0 | $ 0

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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=49121117&loc=d3e13433-108611 + Details
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