PARENT COMPANY FINANCIAL INFORMATION - Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating activities:
Net income attributable to WSFS	$ 222,375	$ 271,442	$ 114,774
Adjustments to reconcile net income to net cash provided by operating activities:
Realized loss on sale of equity investments		(4,400)	(22,800)
Unrealized (gains) losses on equity investments	(5,980)	(5,141)	(761)
Decrease (increase) in other assets	(58,852)	(46,378)	(18,339)
Increase (decrease) in other liabilities	315,065	(4,807)	24,675
Net cash provided by operating activities	480,854	125,648	15,142
Investing activities:
Net cash used in investing activities	(137,367)	(1,492,368)	(874,944)
Financing activities:
Issuance of common stock and exercise of common stock options	3,179	1,522	2,032
Issuance of senior debt	0	0	147,780
Redemption of senior debt	0	(100,000)	0
Purchase of treasury stock	(200,083)	(13,268)	(155,832)
Dividends paid	(35,746)	(24,242)	(24,369)
Net cash (used in) provided by financing activities	(1,039,168)	1,244,924	1,942,785
(Decrease) increase in cash, cash equivalents, and restricted cash	(695,681)	(121,796)	1,082,983
Cash, cash equivalents, and restricted cash at beginning of period	1,532,939	1,654,735	571,752
Cash, cash equivalents, and restricted cash at end of period	837,258	1,532,939	1,654,735
WSFS Financial Corporation
Operating activities:
Net income attributable to WSFS	222,375	271,442	114,774
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in undistributed loss (income) of subsidiaries	12,672	(276,208)	84,346
Realized loss on sale of equity investments	0	706	0
Unrealized (gains) losses on equity investments	(5,379)	(5,389)	1,617
Decrease (increase) in other assets	2,569	10,910	(4,537)
Increase (decrease) in other liabilities	812	(6,690)	7,684
Net cash provided by operating activities	233,049	(5,229)	203,884
Investing activities:
Net cash for business combinations	101,734	0	0
Net cash used in investing activities	101,734	0	0
Financing activities:
Issuance of common stock and exercise of common stock options	3,179	1,522	2,032
Issuance of senior debt	0	0	147,780
Redemption of senior debt	0	(100,000)	0
Purchase of treasury stock	(200,083)	(13,268)	(155,832)
Dividends paid	(35,746)	(24,242)	(24,369)
Net cash (used in) provided by financing activities	(232,650)	(135,988)	(30,389)
(Decrease) increase in cash, cash equivalents, and restricted cash	102,133	(141,217)	173,495
Cash, cash equivalents, and restricted cash at beginning of period	103,708	244,925	71,430
Cash, cash equivalents, and restricted cash at end of period	$ 205,841	$ 103,708	$ 244,925