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Fair Value Measurements - Effect of Interest Rate Swap (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Derivative [Line Items] |  |  |  |
Interest expense | $ 3,573 | $ 6,356 | $ 5,597 | $ 10,163
Derivative payments on interest rate swap | 0 | 0 | 1,717 | 0
Loss on interest rate swap | 0 | 0 | 2,033 | 0
Interest Rate Swap |  |  |  |
Derivative [Line Items] |  |  |  |
Interest expense | $ 0 | $ 3,436 | $ 0 | $ 4,806

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