SEGMENT INFORMATION - Details of Segment Information - Statement of Financial Condition (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Cash and cash equivalents	$ 2,283,769	$ 1,532,939
Goodwill	887,165	472,828
Other segment assets	17,793,740	13,771,560
Total assets	20,964,674	15,777,327
WSFS Bank
Segment Reporting Information [Line Items]
Cash and cash equivalents	1,773,611	1,039,046
Goodwill	750,275	452,629
Other segment assets	17,423,737	13,481,370
Total assets	19,947,623	14,973,045
Cash Connect
Segment Reporting Information [Line Items]
Cash and cash equivalents	479,576	477,806
Goodwill	0	0
Other segment assets	4,836	6,785
Total assets	484,412	484,591
Wealth Management
Segment Reporting Information [Line Items]
Cash and cash equivalents	30,582	16,087
Goodwill	136,890	20,199
Other segment assets	365,167	283,405
Total assets	$ 532,639	$ 319,691