CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 62,662	$ 3,967
Less: Net income attributable to noncontrolling interest	258	163
Net income attributable to WSFS	62,404	3,804
Net change in unrealized gains (losses) on investment securities available-for-sale
Net unrealized gains (losses) arising during the period, net of tax expense (benefit) of $16,740 and $(87,132), respectively	53,010	(275,918)
Net change in securities held-to-maturity
Amortization of unrealized losses (gains) on available-for-sale securities reclassified to held-to-maturity, net of tax (benefit) expense of $(1,315) and $9, respectively	4,165	(28)
Net change in unfunded pension liability
Change in unfunded pension liability related to unrealized loss, prior service cost and transition obligation, net of tax benefit of $11 and 9, respectively	(35)	(27)
Net change in cash flow hedge
Net unrealized gain arising during the period, net of tax expense of $105 and $—, respectively	332	1
Amortization of unrealized gain on terminated cash flow hedges, net of tax benefit of $13 and $13, respectively	(40)	(40)
Net change in cash flow hedge	292	(39)
Net change in equity method investments
Net change in other comprehensive income of equity method investments, net of tax benefit of $1 and $—, respectively	(3)	0
Net current-period other comprehensive (loss) income	57,429	(276,012)
Total comprehensive income (loss)	$ 119,833	$ (272,208)