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Derivative Instruments - Location and Amounts of Derivative Gains and Losses in Condensed Consolidated Statements of Income (Details) - Derivatives not designated as hedging instruments - Interest rate swaps - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Net unrealized gain (loss) on financial instruments |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net unrealized gain (loss) on financial instruments | $ 39,986 | $ (27,569) | $ (35,363)
Financing interest expense |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net unrealized gain (loss) on financial instruments | $ 25,650 | $ 15,842 | $ (5,411)

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