Basis of Presentation of Interim Period Statements - Additional Information (Detail) $ / shares in Units, $ in Thousands			6 Months Ended		12 Months Ended
	Jun. 04, 2024 $ / shares shares	Dec. 31, 2023 USD ($) $ / shares shares	Jun. 30, 2024 USD ($) Company $ / shares shares	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) $ / shares shares	Jun. 03, 2024 shares
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Stock split, description			On June 4, 2024, we amended our Charter to increase the number of authorized shares of common stock from 20,500,000 shares to 82,000,000 shares, and our Board of Directors declared a four-for-one split of the Company’s common stock effected in the form of a stock dividend (the “2024 Stock Split”). Each stockholder of record at the close of business on June 14, 2024 received a dividend of three additional shares of common stock for each then-held share, distributed after close of trading on June 21, 2024.
Common stock, shares authorized | shares	82,000,000	82,000,000	82,000,000		82,000,000	20,500,000
Stock split, conversion ratio	0.25		0.25
Common stock, par value | $ / shares	$ 0.01	$ 0.01	$ 0.01		$ 0.01
Revenue recognition professional employer service contracts term			1 year
Professional employer service contract cancellation and termination period			30 days
Payment term for staffing customers			30 days
Number of wholly-owned insurance companies | Company			2
Cash and cash equivalents, maturity term			3 months
Allowance for expected credit losses		$ 900	$ 900		$ 900
Income taxes paid			260	$ 2,840
Prior period reclassification adjustment		$ 1,300	$ 5,400	$ 400	$ 200