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Related Parties - Summary of Transactions with Subsidiaries (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2021 | Mar. 31, 2020 | Mar. 31, 2019
Transactions |  |  |  |  |  |  |  |  |  |  |  |
Other operating expenses |  | $ 18,120 | $ 15,020 | $ 10,308 | $ 7,627 | $ 65,793 | $ 40,273 | $ 38,072 | $ 41,263 | $ 51,075 | $ 185,401 | $ 133,295
Trip.com and its Subsidiaries [Member] |  |  |  |  |  |  |  |  |  |  |  |
Transactions |  |  |  |  |  |  |  |  |  |  |  |
Commission received |  |  |  |  |  |  |  |  |  | 11 | 190 |
Commission paid |  |  |  |  |  |  |  |  |  | 61 | 1,087 |
Other operating expenses |  |  |  |  |  |  |  |  |  | 284 | 1,556 |
Trip.com and its Subsidiaries [Member] | Air Ticketing [Member] |  |  |  |  |  |  |  |  |  |  |  |
Transactions |  |  |  |  |  |  |  |  |  |  |  |
Sale (refund) of air ticketing | [1] |  |  |  |  |  |  |  |  | (14) | 1,241 |
Purchase (refund) of air ticketing | [1] |  |  |  |  |  |  |  |  | (659) | 21,610 |
Trip.com and its Subsidiaries [Member] | Hotels and Packages [Member] |  |  |  |  |  |  |  |  |  |  |  |
Transactions |  |  |  |  |  |  |  |  |  |  |  |
Sale of hotel and packages | [1] |  |  |  |  |  |  |  |  | 425 | 7,734 |
Purchase of hotel and packages | [1] |  |  |  |  |  |  |  |  | $ 647 | $ 6,451 |
[1] | represents gross amount booked/charged for the air ticketing and hotels and packages transactions

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