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Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2021

Earnings Per Share [Abstract]

Computation of basic and diluted net income (loss) per share

The computation of basic and diluted earnings per share for the years ended December 31, 2021, 2020 and 2019 were as follows:

			For the Years Ended December 31,
Basic and Diluted Earnings Per Share			2021						2020						2019
Numerator:
Net income attributable to APAM			$	336,516					$	212,617					$	156,536
Less: Allocation to participating securities			31,430						23,268						21,154
Net income available to common stockholders			$	305,086					$	189,349					$	135,382
Denominator:
Basic weighted average shares outstanding			59,866,790						55,633,529						51,127,929
Dilutive effect of nonparticipating equity awards			14,249						4,393						—
Diluted weighted average shares outstanding			59,881,039						55,637,922						51,127,929
Earnings per share - Basic			$	5.10					$	3.40					$	2.65
Earnings per share - Diluted			$	5.09					$	3.40					$	2.65

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The following table summarizes the weighted-average shares outstanding that are excluded from the calculation of diluted earnings per share because their effect would have been anti-dilutive:

			For the Years Ended December 31,
Anti-Dilutive Weighted Average Shares Outstanding			2021						2020						2019
Holdings limited partnership units			14,167,538						17,885,335						21,827,809
Unvested restricted share-based awards			5,410,221						5,313,466						5,026,357
Total			19,577,759						23,198,801						26,854,166

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Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities.

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Tabular disclosure of the effect of income (loss) on basic earnings per share.

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