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Financial Instruments and Derivatives - Effect of Derivative Instruments on Consolidated Statement of Operations (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Derivative [Line Items] |  |  |
Unrealized (loss) gain from the effective portion of derivative instruments |  | $ (11,676) | $ (751)
Derivative Instruments, (Loss) Gain Recognized in Income, Net | $ 2,562 | 17,886 | (2,576)
Designated as Hedging Instrument | Interest Expense |  |  |
Derivative [Line Items] |  |  |
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) | (1,088) | 1,747 | 1,938
Designated as Hedging Instrument | Interest Rate Contract |  |  |
Derivative [Line Items] |  |  |
Unrealized (loss) gain from the effective portion of derivative instruments |  | (11,676) | (751)
Not Designated as Hedging Instrument | Interest Expense |  |  |
Derivative [Line Items] |  |  |
Derivative Instruments, (Loss) Gain Recognized in Income, Net | $ 2,562 | $ 17,886 | $ (2,576)

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959 + Details
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- Definition The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624177-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624171-113959 + Details
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- Definition Amount, after tax and before reclassification, of gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e637-108580 + Details
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