v3.22.0.1
Acquisitions - Narrative (Details)
$ in Thousands, shares in Millions
12 Months Ended
Apr. 15, 2019
USD ($)
shares
Dec. 31, 2021
USD ($)
acquistion
Dec. 31, 2020
USD ($)
acquistion
Dec. 31, 2019
USD ($)
acquistion
Business Acquisition [Line Items]        
Unrecognized compensation cost related to stock option awards granted   $ 85,700    
Goodwill   652,602 $ 655,801 $ 652,088
Stock-based compensation expense   $ 898,830 $ 3,001,948 97,547
HotelTonight        
Business Acquisition [Line Items]        
Total purchase consideration $ 441,357      
Acquisition, shares issued (in shares) | shares 3.2      
Reimbursement of acquisition-related transaction costs $ 11,300      
Acquisition-related costs 3,900      
Unrecognized compensation cost related to stock option awards granted 12,300      
Payments to acquire businesses 237,387      
Goodwill 329,899      
Net liabilities assumed $ 32,502      
Other Acquisitions        
Business Acquisition [Line Items]        
Total purchase consideration       $ 63,300
Number of business combinations | acquistion   0 0 2
Payments to acquire businesses       $ 11,400
Stock issued as consideration in business combination, amount       36,700
Business combination, contingent consideration       15,300
Goodwill       33,800
Intangible assets       31,700
Net liabilities assumed       2,200
Contingent consideration, increase (decrease) in fair value     $ 30,900 0
Stock-based compensation expense     $ 22,400 $ 0
Intangible assets acquired, weighted-average useful life       5 years 4 months 24 days
Goodwill deductible for income tax purposes       $ 15,000