v3.26.3
Earnings Per Share (Tables)
 9 Months Ended
Sep. 30, 2026
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method
The computation of basic and diluted earnings per share for the three and nine months ended September 30, 2026 and 2025 were as follows:
 For the Three Months Ended September 30, For the Nine Months Ended September 30,
Basic and Diluted Earnings Per Share2026202520262025
Numerator:
Net income attributable to APAM$75,196 $66,830 $214,065 $195,524 
Less: Allocation to participating securities6,069 5,582 17,840 16,384 
Net income available to common stockholders$69,127 $61,248 $196,225 $179,140 
Denominator:
Basic weighted average shares outstanding66,380,225 65,666,782 66,288,288 65,562,800 
Dilutive effect of nonparticipating share-based awards— — — — 
Diluted weighted average shares outstanding66,380,225 65,666,782 66,288,288 65,562,800 
Earnings per share - Basic $1.04 $0.93 $2.96 $2.73 
Earnings per share - Diluted$1.04 $0.93 $2.96 $2.73 
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 Three Months Ended September 30, For the Nine Months Ended September 30,
Anti-Dilutive Weighted Average Shares Outstanding2026202520262025
Holdings limited partnership units10,063,419 10,235,519 10,086,678 10,248,400 
Unvested restricted share-based awards5,202,733 5,334,895 5,168,386 5,364,190 
Total15,266,152 15,570,414 15,255,064 15,612,590