EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Numerator:
Net income attributable to WSFS	$ 73,382	$ 54,406	$ 137,926	$ 215,155
Net income attributable to WSFS	$ 73,382	$ 54,406	$ 137,926	$ 215,155
Denominator:
Weighted average basic shares (in shares)	63,047,675	47,541,489	64,064,488	47,526,730
Dilutive potential common shares (in shares)	180,000	130,000	219,000	150,000
Weighted average fully diluted shares (in shares)	63,227,983	47,670,645	64,282,992	47,676,515
Earnings per share:
Basic (in dollars per share)	$ 1.16	$ 1.14	$ 2.15	$ 4.53
Diluted (in dollars per share)	$ 1.16	$ 1.14	$ 2.15	$ 4.51
Outstanding common stock equivalents having no dilutive effect (in shares)	2,000	5,000	7,000	0