CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 3,967	$ 65,141
Less: Net income attributable to noncontrolling interest	163	59
Net income attributable to WSFS	3,804	65,082
Net change in unrealized (losses) on investment securities available-for-sale
Net unrealized losses arising during the period, net of tax (benefit) of $(87,132) and $(21,972), respectively	(275,918)	(69,589)
Less: reclassification adjustment for net gains on sales realized in net income, net of tax expense of $0 and $79, respectively	0	(250)
Net change in unrealized gains (losses) on investment securities available-for-sale	(275,918)	(69,839)
Net change in securities held-to-maturity
Amortization of unrealized gain on securities reclassified to held-to-maturity, net of tax expense of $9 and $5, respectively	(28)	(16)
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 $9 and $5, respectively	(27)	(16)
Net change in unfunded pension liability	(27)	(16)
Net change in cash flow hedge
Net unrealized gain arising during the period, net of tax expense of $— and $— , respectively	1	0
Amortization of unrealized gain on terminated cash flow hedges, net of tax benefit of $13 and $35, respectively	(40)	(111)
Net change in cash flow hedge	(39)	(111)
Net change in equity method investments
Net change in other comprehensive income of equity method investments, net of tax expense of $— and $86, respectively	0	273
Total other comprehensive loss	(276,012)	(69,709)
Total comprehensive loss	$ (272,208)	$ (4,627)