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		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Numerator:
Net income (loss) attributable to Alignment Healthcare, Inc.		$ (44,762)	$ 8,365	$ (101,636)	$ (1,707)
Denominator:
Total weighted-average common shares outstanding - basic and diluted		187,273,782	164,063,789	176,502,293	158,490,387
Less: Restricted shares of common stock		10,431,660	10,878,750	10,803,311	11,515,769
Total weighted-average common shares outstanding, net of restricted shares of common stock - basic and diluted	[1]	176,842,122	153,185,039	165,698,982	146,974,618
Net loss per share:
Net loss per share - basic and diluted		$ (0.25)	$ 0.05	$ (0.61)	$ (0.01)

[1] The weighted-average shares used in computing net loss per share, basic and diluted were retroactively adjusted as a result of the Reorganization. See Note 1 to the condensed consolidated financial statements for additional details.