Operating Segment Information (Detail) - (Table 2) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Segment Reporting Information [Line Items]
Domestic	$ 523,553	$ 445,302	$ 1,075,934	$ 909,136
Domestic Destination [Member]
Segment Reporting Information [Line Items]
Domestic	428,534	361,405	883,324	739,546
Non-US [Member]
Segment Reporting Information [Line Items]
Domestic	95,019	83,897	192,610	169,590
Geographical [Member]
Segment Reporting Information [Line Items]
Domestic	$ 85,666	$ 65,059	$ 168,123	$ 122,066