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Accumulated Other Comprehensive Income (Amounts Reclassified from AOCI) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Acceleration of 2020 Swap | $ 32,848 | $ 28,569 | $ 27,749
Total | 32,030 | 71,451 | 27,382
Interest Rate Swap | Reclassification out of Accumulated Other Comprehensive Loss | Derivative Instruments |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Interest Expense - Amortization of IRPAs | 410 | 233 | 96
Interest Expense - Settlement Payments | 6,516 | (1,217) | 109
Acceleration of 2020 Swap | 201 | 0 | 0
Total | $ 7,127 | $ (984) | $ 205

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