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Derivative Financial Instruments - Impact on Interest Expense of Interest Rate Agreements Accounted for as Cash Flow Hedges (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Derivative [Line Items] |  |  |  |
Total interest expense | $ (103,754) | $ (100,411) | $ (314,371) | $ (349,748)
Cash Flow Hedging | Interest rate contract |  |  |  |
Derivative [Line Items] |  |  |  |
Net interest expense on cash flows hedges | 0 | 0 | 0 | (860)
Realized net losses reclassified from other comprehensive income | (1,041) | (1,040) | (3,086) | (2,148)
Total interest expense | $ (1,041) | $ (1,040) | $ (3,086) | $ (3,008)

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