Summary of Significant Accounting Policies - Cash Proceeds Received from the Sale of Mileage Credits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accounting Policies [Abstract]
Consideration received from credit card loyalty programs	$ 93,147	$ 80,970	$ 48,035
Portion of proceeds recognized immediately as marketing component	$ 48,071	$ 40,987	$ 23,681