Summary of Significant Accounting Policies - Schedule of Computation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Numerator:
Net loss	$ (9,354)	$ (46,575)
Less: Net loss attributable to noncontrolling interest	240	54
Net loss attributable to Alignment Healthcare, Inc.	$ (9,114)	$ (46,521)
Denominator:
Total weighted-average common shares outstanding - basic (in shares)	193,653,028	189,597,668
Total weighted-average common shares outstanding - diluted (in shares)	193,653,028	189,597,668
Less: Restricted shares of common stock (in shares)	(46,590)	(592,274)
Total weighted-average common shares outstanding, net of restricted shares of common stock - basic (in shares)	193,606,438	189,005,394
Total weighted-average common shares outstanding, net of restricted shares of common stock - diluted (in shares)	193,606,438	189,005,394
Net loss per share:
Net loss per share - basic (in dollars per share)	$ (0.05)	$ (0.25)
Net loss per share - diluted (in dollars per share)	$ (0.05)	$ (0.25)