EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Numerator:
Net income attributable to WSFS	$ 64,435	$ 74,166	$ 199,469	$ 205,248
Net income attributable to WSFS	$ 64,435	$ 74,166	$ 199,469	$ 205,248
Denominator:
Weighted average basic shares (in shares)	59,185,848	60,941,922	59,788,212	61,264,862
Dilutive potential common shares (in shares)	208,000	97,000	168,000	103,000
Weighted average fully diluted shares (in shares)	59,393,651	61,039,317	59,956,324	61,367,802
Earnings per share:
Basic (in dollars per share)	$ 1.09	$ 1.22	$ 3.34	$ 3.35
Diluted (in dollars per share)	$ 1.08	$ 1.22	$ 3.33	$ 3.34
Outstanding common stock equivalents having no dilutive effect (in shares)	0	18,000	2,000	18,000