EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Numerator:
Net income attributable to WSFS	$ 222,375	$ 271,442	$ 114,774
Denominator:
Weighted average basic shares (in shares)	63,453	47,539	50,510
Dilutive potential common shares (in shares)	206	164	37
Weighted average fully diluted shares (in shares)	63,659	47,703	50,547
Earnings per share:
Basic (in dollars per share)	$ 3.50	$ 5.71	$ 2.27
Diluted (in dollars per share)	$ 3.49	$ 5.69	$ 2.27
Outstanding common stock equivalents having no dilutive effect (in shares)	9	1	12