Summary of Significant Accounting Policies - Schedule of Computation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Numerator:
Net Loss	$ (128,071)	$ (148,173)	$ (149,639)
Less: Net loss attributable to noncontrolling interest	36	156	92
Net loss attributable to Alignment Healthcare, Inc.	$ (128,035)	$ (148,017)	$ (149,547)
Denominator:
Total weighted-average common shares outstanding - basic (in shares)	191,150,693	188,420,487	187,227,877
Total weighted-average common shares outstanding - diluted (in shares)	191,150,693	188,420,487	187,227,877
Less: Restricted shares of common stock (in shares)	(357,141)	(2,205,703)	(6,015,120)
Total weighted-average common shares outstanding, net of restricted shares of common stock - basic (in shares)	190,793,552	186,214,784	181,212,757
Total weighted-average common shares outstanding, net of restricted shares of common stock - diluted (in shares)	190,793,552	186,214,784	181,212,757
Net loss per share:
Net loss per share - basic (in dollars per share)	$ (0.67)	$ (0.79)	$ (0.83)
Net loss per share - diluted (in dollars per share)	$ (0.67)	$ (0.79)	$ (0.83)