Basic and Diluted Net Income Per Share - Summary of Basic Net Income (Loss) Per Share of Class A and Class B Common Stock (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Numerator:
Net income	$ 13,544	$ 9,273
Less net income (loss) attributable to non-controlling interests	249	(175)
Net income attributable to Guardian Pharmacy Services, Inc.	$ 13,295	$ 9,448