SEGMENT INFORMATION - Details of Segment Information - Statement of Financial Condition (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Cash and cash equivalents	$ 1,676,609	$ 1,532,939
Goodwill	883,116	472,828
Other segment assets	17,990,491	13,771,560
Total assets	20,550,216	15,777,327
WSFS Bank
Segment Reporting Information [Line Items]
Cash and cash equivalents	1,018,601	1,039,046
Goodwill	753,065	452,629
Other segment assets	17,641,781	13,481,370
Total assets	19,413,447	14,973,045
Cash Connect
Segment Reporting Information [Line Items]
Cash and cash equivalents	624,794	477,806
Goodwill	0	0
Other segment assets	9,838	6,785
Total assets	634,632	484,591
Wealth Management
Segment Reporting Information [Line Items]
Cash and cash equivalents	33,214	16,087
Goodwill	130,051	20,199
Other segment assets	338,872	283,405
Total assets	$ 502,137	$ 319,691