EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Numerator:
Net income attributable to WSFS, basic	$ 263,671	$ 269,156	$ 222,375
Net income attributable to WSFS, diluted	$ 263,671	$ 269,156	$ 222,375
Denominator:
Weighted average basic shares (in shares)	59,547	61,108	63,453
Dilutive potential common shares (in shares)	192	113	206
Weighted average fully diluted shares (in shares)	59,739	61,221	63,659
Earnings per share:
Basic (in dollars per share)	$ 4.43	$ 4.40	$ 3.50
Diluted (in dollars per share)	$ 4.41	$ 4.40	$ 3.49
Outstanding common stock equivalents having no dilutive effect (in shares)	2	14	9