SEGMENT INFORMATION - Details of Segment Information - Statement of Financial Condition (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Cash and cash equivalents	$ 1,031,391	$ 1,532,939
Goodwill	883,637	472,828
Other segment assets	18,070,359	13,771,560
Total assets	19,985,387	15,777,327
WSFS Bank
Segment Reporting Information [Line Items]
Cash and cash equivalents	436,447	1,039,046
Goodwill	753,586	452,629
Other segment assets	17,718,878	13,481,370
Total assets	18,908,911	14,973,045
Cash Connect
Segment Reporting Information [Line Items]
Cash and cash equivalents	559,371	477,806
Goodwill	0	0
Other segment assets	6,603	6,785
Total assets	565,974	484,591
Wealth Management
Segment Reporting Information [Line Items]
Cash and cash equivalents	35,573	16,087
Goodwill	130,051	20,199
Other segment assets	344,878	283,405
Total assets	$ 510,502	$ 319,691