Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Numerator:
Net income attributable to WSFS	$ 271,442	$ 114,774	$ 148,809
Denominator:
Weighted average basic shares (in shares)	47,539	50,510	49,298
Dilutive potential common shares (in shares)	164	37	256
Weighted average fully diluted shares (in shares)	47,703	50,547	49,554
Earnings per share:
Basic (in dollars per share)	$ 5.71	$ 2.27	$ 3.02
Diluted (in dollars per share)	$ 5.69	$ 2.27	$ 3.00
Outstanding common stock equivalents having no dilutive effect (in shares)	1	12	1