Segment and Geographic Information - Summary of Revenue and Long-lived Assets (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Segment Reporting Information [Line Items]
Revenues	$ 219,462	$ 197,660	$ 428,038	$ 407,978
Long-lived assets	109,206		109,206		$ 107,298
United States [Member]
Segment Reporting Information [Line Items]
Revenues	148,628	137,391	291,288	282,666
Long-lived assets	95,994		95,994		92,983
United Kingdom [Member]
Segment Reporting Information [Line Items]
Revenues	44,570	37,891	87,299	79,111
Long-lived assets	11,582		11,582		12,683
Other [Member]
Segment Reporting Information [Line Items]
Revenues	26,264	$ 22,378	49,451	$ 46,201
Long-lived assets	$ 1,630		$ 1,630		$ 1,632