CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 65,723	$ 62,662
Less: Net (loss) income attributable to noncontrolling interest	(38)	258
Net income attributable to WSFS	65,761	62,404
Net change in unrealized (losses) gains on investment securities available-for-sale
Net unrealized (losses) gains arising during the period, net of tax (benefit) expense of $(12,634) and $16,740, respectively	(40,007)	53,010
Net change in securities held-to-maturity
Net change in unrealized gains on available-for-sale securities reclassified to held-to-maturity, net of tax benefit of $1,158 and $1,315, respectively	3,669	4,165
Net change in unfunded pension liability
Change in unfunded pension liability related to unrealized gain and prior service cost, net of tax expense of $39 and $11, respectively	(124)	(35)
Net change in cash flow hedge
Net unrealized (loss) gain arising during the period, net of tax (benefit) expense of $(2,031) and $105, respectively	(6,433)	332
Amortization of unrealized gain on terminated cash flow hedges, net of tax benefit of $— and $13, respectively	0	(40)
Net change in cash flow hedge	(6,433)	292
Net change in equity method investments
Net change in other comprehensive income of equity method investments, net of tax benefit of $7 and $1, respectively	(21)	(3)
Net current-period other comprehensive (loss) income	(42,916)	57,429
Total comprehensive income	$ 22,845	$ 119,833