Segment and Geographic Information - Summary of Revenue and Long-lived Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Revenues	$ 817,097	$ 752,547	$ 718,300
Long-lived assets	107,298	102,671
United States [Member]
Segment Reporting Information [Line Items]
Revenues	568,595	523,683	510,802
Long-lived assets	92,983	87,502
United Kingdom [Member]
Segment Reporting Information [Line Items]
Revenues	161,838	147,019	126,862
Long-lived assets	12,683	14,713
Other [Member]
Segment Reporting Information [Line Items]
Revenues	86,664	81,845	$ 80,636
Long-lived assets	$ 1,632	$ 456