v3.26.3
Earnings Per Share - Schedule of Earnings Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2026
Jun. 30, 2026
Mar. 31, 2026
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Sep. 30, 2026
Sep. 30, 2025
Earnings Per Share [Abstract]                
Net income attributable to Amerant Bancorp Inc. $ 25,716 $ 21,043 $ 17,873 $ 14,756 $ 23,002 $ 11,958 $ 64,632 $ 49,716
Basic weighted average shares outstanding (in shares) 39,164,732     41,590,201     39,594,915 41,802,195
Dilutive effect of share-based compensation awards (in shares) 280,052     183,900     222,655 141,051
Diluted weighted average shares outstanding (in shares) 39,444,784     41,774,101     39,817,570 41,943,246
Basic earnings per common share (in dollars per share) $ 0.66     $ 0.35     $ 1.63 $ 1.19
Diluted earnings per common share (in dollars per share) $ 0.65     $ 0.35     $ 1.62 $ 1.19