Parent Company Financial Information - Condensed Statements of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income:
Realized (loss) gain on sale of equity investment, net	$ (706)	$ 22,052	$ 0
Unrealized gains (losses) on equity investments, net	331	9,076	333
Other noninterest income	185,480	201,025	188,109
Total revenue	641,849	715,430	709,201
Expense:
Interest expense	22,720	48,450	76,144
Other operating expense	(456,369)	(514,405)	(521,092)
Net expenses	(433,649)	(465,955)	(444,948)
Income before taxes	357,700	144,956	194,370
Income tax (benefit) provision	86,095	31,636	46,452
WSFS Financial Corporation
Income:
Interest income	357	356	5,589
Realized (loss) gain on sale of equity investment, net	(706)	0	0
Unrealized gains (losses) on equity investments, net	5,389	(1,617)	3,646
Other noninterest income	4,759	208,762	240,408
Total revenue	9,799	207,501	249,643
Expense:
Interest expense	7,771	6,748	7,490
Other operating expense	7,508	2,553	259
Net expenses	15,279	9,301	7,749
(Loss) income before equity in undistributed income of subsidiaries	(5,480)	198,200	241,894
Equity in undistributed income (loss) of subsidiaries	276,208	(84,346)	(92,020)
Income before taxes	270,728	113,854	149,874
Income tax (benefit) provision	(714)	(920)	1,065
Net income attributable to WSFS	$ 271,442	$ 114,774	$ 148,809