EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Numerator:
Net income attributable to WSFS, basic	$ 76,449	$ 64,435	$ 214,671	$ 199,469
Net income attributable to WSFS, diluted	$ 76,449	$ 64,435	$ 214,671	$ 199,469
Denominator:
Weighted average basic shares (in shares)	55,804,955	59,185,848	56,976,693	59,788,212
Dilutive potential common shares (in shares)	156,000	208,000	195,000	168,000
Weighted average fully diluted shares (in shares)	55,960,833	59,393,651	57,171,976	59,956,324
Earnings per share:
Basic (in dollars per share)	$ 1.37	$ 1.09	$ 3.77	$ 3.34
Diluted (in dollars per share)	$ 1.37	$ 1.08	$ 3.75	$ 3.33
Outstanding common stock equivalents having no dilutive effect (in shares)	0	0	1,000	2,000