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Interest Expense (Components of Interest Expense) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Interest and Debt Expense [Abstract] |  |  |  |
Interest incurred on debt | $ 10,458 | $ 13,526 | $ 32,743 | $ 44,476
Accretion of original issue discount on 2018 Term Loan Facility | 178 | 815 | 1,043 | 2,658
Amortization of debt issuance costs and modification costs | 642 | 1,707 | 2,818 | 7,075
Unrealized mark-to-market gain on de-designated interest rate swap | (249) | 0 | (6,964) | 0
Gain upon partial termination of interest rate swap | (4,605) | 0 | (4,605) | 0
Interest expense | $ 6,424 | $ 16,048 | $ 25,035 | $ 54,209

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