Net Income (Loss) Per Share - Summary of Calculation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Basic
Net income (loss)	$ 14,046	$ (2,334)
Less: net income (loss) attributable to non-controlling interest	2,579	(386)
Net income (loss) attributable to MediaAlpha, Inc.	$ 11,467	$ (1,948)
Denominator:
Weighted-average shares of Class A common stock outstanding - basic (in shares)	55,846,097	55,632,321
Weighted-average shares of Class A common stock outstanding - diluted (in shares)	55,846,097	55,632,321
Net income (loss) attributable to MediaAlpha, Inc. per share of Class A common stock - basic (in dollars per share)	$ 0.21	$ (0.04)
Net income (loss) attributable to MediaAlpha, Inc. per share of Class A common stock - diluted (in dollars per share)	$ 0.21	$ (0.04)

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Amount of Net Income (Loss) attributable to noncontrolling interest.

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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