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Financial Instruments - Derivatives and Hedging (Tables) | 12 Months Ended
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Dec. 31, 2020
Derivative [Line Items] |
Schedule of derivative instruments in Statement of Financial Position, fair value |
|  | Fair Value of Derivative Instruments
Interest rate swaps classified as: |  | December 31, 2020 |  | December 31, 2019
Gross derivative assets |  | $ | — |  |  | $ | 3,795 |
Gross derivative liabilities |  | (28,225) |  |  | (13,449) |
Net derivative liabilities |  | $ | (28,225) |  |  | $ | (9,654) |
Schedule of Derivatives in Cash Flow Hedging Relationships | The effective portion of the Company’s interest rate swaps that was recognized on the Company’s Consolidated Statements of Comprehensive Income for the years ended December 31, 2020, 2019 and 2018 is as follows:
Derivatives in Cash Flow Hedging Relationships (Interest Rate Swaps) |  | Year Ended December 31,
| 2020 |  | 2019 |  | 2018
Change in unrealized gain (loss) on interest rate swaps |  | $ | (26,998) |  |  | $ | (19,333) |  |  | $ | 3,837 |
Amortization (accretion) of interest rate swaps to interest expense |  | 8,427 |  |  | (6,380) |  |  | (12,198) |
Change in unrealized loss on interest rate swaps, net |  | $ | (18,571) |  |  | $ | (25,713) |  |  | $ | (8,361) |
Cash Flow Hedging | Designated as Hedging Instrument |
Derivative [Line Items] |
Schedule of interest rate derivatives | Detail on the Company’s interest rate derivatives designated as cash flow hedges outstanding as of December 31, 2020 and 2019 is as follows:
| Number of Instruments |  | Notional Amount
| December 31, 2020 |  | December 31, 2019 |  | December 31, 2020 |  | December 31, 2019
Interest Rate Swaps | 7 |  | 7 |  | $ | 800,000 |  |  | $ | 800,000 |

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- Definition Tabular disclosure of gain (loss) on derivative and nonderivative instruments designated and qualifying as cash flow hedge recorded in accumulated other comprehensive income (AOCI) and reclassified into earnings. + References Reference 1: 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 Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624163-113959 + Details
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- Definition Tabular disclosure of interest rate derivatives, including, but not limited to, the fair value of the derivatives, statement of financial position location, and statement of financial performance location of these 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 4C -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624171-113959 + Details
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