BASIS OF PRESENTATION (Details)	Jun. 30, 2020 subsidiary Office
Basis Of Presentation [Line Items]
Number of unconsolidated affiliate | subsidiary	1
Number of majority-owned subsidiary | subsidiary	1
Number of banking offices	115
Pennsylvania
Basis Of Presentation [Line Items]
Number of banking offices	54
Delaware
Basis Of Presentation [Line Items]
Number of banking offices	43
New Jersey
Basis Of Presentation [Line Items]
Number of banking offices	16
Virginia
Basis Of Presentation [Line Items]
Number of banking offices	1
Nevada
Basis Of Presentation [Line Items]
Number of banking offices	1
WSFS Financial Corporation
Basis Of Presentation [Line Items]
Number of wholly-owned subsidiaries | subsidiary	3