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Leases - Summary Of Lease Related Expenses (Parenthetical) (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Leases [Abstract] |  |  |  |
Short-term lease costs | $ 275 | $ 777 | $ 315 | $ 943

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