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Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Income Statement [Abstract] |  |  |
General and administrative expenses, equity-based compensation | $ 15,897 | $ 13,588 | $ 13,314
Unrealized gain (loss) on derivatives | $ (28,576) | $ 29,345 | $ (11,523)

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