XML 72 R61.htm IDEA: XBRL DOCUMENT v3.24.3
Earnings Per Share - Computation of basic and diluted net income per share (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Earnings Per Share [Abstract]        
Net income attributable to APAM $ 72,990 $ 53,155 $ 190,045 $ 157,533
Less: Allocation to participating securities 6,176 4,691 16,068 13,799
Net income available to common stockholders $ 66,814 $ 48,464 $ 173,977 $ 143,734
Basic weighted average shares outstanding (in shares) 65,123,054 63,520,402 64,802,431 63,419,587
Dilutive effect of nonparticipating share-based awards (in shares) 39,844 42,642 37,625 30,217
Diluted weighted average shares outstanding (in shares) 65,162,898 63,563,044 64,840,056 63,449,804
Earnings per share - Basic (in dollars per share) $ 1.03 $ 0.76 $ 2.68 $ 2.27
Earnings per share - Diluted (in dollars per share) $ 1.03 $ 0.76 $ 2.68 $ 2.27