Acquisitions - Identified Intangible Assets Recognized (Details) - HotelTonight $ in Thousands |
Apr. 15, 2019
USD ($)
|
|---|---|
| Acquired Finite-Lived Intangible Assets [Line Items] | |
| Identified intangible assets | $ 88,000 |
| Developed technology | |
| Acquired Finite-Lived Intangible Assets [Line Items] | |
| Estimated Useful Life | 3 years |
| Identified intangible assets | $ 20,000 |
| Listing relationships | |
| Acquired Finite-Lived Intangible Assets [Line Items] | |
| Estimated Useful Life | 10 years |
| Identified intangible assets | $ 35,100 |
| Trade names | |
| Acquired Finite-Lived Intangible Assets [Line Items] | |
| Estimated Useful Life | 5 years |
| Identified intangible assets | $ 32,900 |