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Fair Value Measurements - Recurring Measurements (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2021 | Dec. 31, 2020
Cash Flow Hedges: |  |
Deferred amounts in accumulated comprehensive income (loss) that will be reclassified into earnings | $ (4,229) |
Fair Value, Measurements, Recurring | Level 1 |  |
Cash Flow Hedges: |  |
Derivative interest rate liabilities | 0 | $ 0
Fair Value, Measurements, Recurring | Level 2 |  |
Cash Flow Hedges: |  |
Derivative interest rate liabilities | (7,661) | (12,449)
Fair Value, Measurements, Recurring | Level 3 |  |
Cash Flow Hedges: |  |
Derivative interest rate liabilities | $ 0 | $ 0

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- Definition The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121549185&loc=d3e80748-113994 + Details
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