Segment and Geographic Information - Summary of Revenue and Long-lived Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Revenues	$ 846,268	$ 817,097	$ 752,547
Long-lived assets	112,431	107,298
United States [Member]
Segment Reporting Information [Line Items]
Revenues	568,383	568,595	523,683
Long-lived assets	99,849	92,983
United Kingdom [Member]
Segment Reporting Information [Line Items]
Revenues	177,257	161,838	147,019
Long-lived assets	10,740	12,683
Other [Member]
Segment Reporting Information [Line Items]
Revenues	100,628	86,664	$ 81,845
Long-lived assets	$ 1,842	$ 1,632