Segments - Summary of Operating Segment Revenue, Net Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	$ 336,595	$ 329,308
Depreciation and amortization	5,976	5,267
Income taxes	4,749	3,833
Net income	13,544	9,273
Consolidated net income (loss)	13,295	9,448
Corporate Segment [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	336,595	329,308
Employee expenses (excluding share-based compensation expense)	81,019	72,380
Share-based compensation expense	1,861	3,968
Other segment items	229,292	234,417
Depreciation and amortization	5,976	5,267
Interest expense	154	170
Income taxes	4,749	3,833
Net income	13,544	9,273
Adjustments and reconciling items	0	0
Consolidated net income (loss)	$ 13,544	$ 9,273