v3.26.3
GOODWILL AND INTANGIBLE ASSETS - Schedule of Allocation of Goodwill to our Reportable Operating Segments for Purposes of Goodwill Impairment Testing (Details) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2026
Dec. 31, 2025
Goodwill [Roll Forward]    
Goodwill beginning balance $ 885,224 $ 885,898
Goodwill adjustments 0 (674)
Goodwill ending balance 885,224 885,224
WSFS Bank    
Goodwill [Roll Forward]    
Goodwill beginning balance 753,586 753,586
Goodwill adjustments 0 0
Goodwill ending balance 753,586 753,586
Wealth and Trust    
Goodwill [Roll Forward]    
Goodwill beginning balance 131,638 132,312
Goodwill adjustments 0 (674)
Goodwill ending balance $ 131,638 $ 131,638