Goodwill and Other Intangible Assets, net - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2018	Dec. 31, 2020	Oct. 01, 2020	Jul. 13, 2017	Jun. 15, 2015
Goodwill and Intangible Assets [Line Items]
Goodwill	$ 27,210	$ 32,510
Goodwill impairment	5,300	0	$ 0
Amortization expense	2,772	2,987	3,170
Data and Analytics Services [Member]
Goodwill and Intangible Assets [Line Items]
Goodwill	18,783	24,083	24,083		$ 24,083
Goodwill impairment	5,300	$ 0	$ 0
Hudson IT [Member]
Goodwill and Intangible Assets [Line Items]
Goodwill								$ 8,400
Info Trellis Inc [Member]
Goodwill and Intangible Assets [Line Items]
Goodwill							$ 27,400
Goodwill impairment	$ 5,300			$ 9,700
Amber Leaf Partners Inc [Member]
Goodwill and Intangible Assets [Line Items]
Goodwill						$ 6,400