CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 69,208	$ 68,595	$ 134,931	$ 131,257
Less: Net (loss) income attributable to noncontrolling interest	(65)	(83)	(103)	175
Net income attributable to WSFS	69,273	68,678	135,034	131,082
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 $(2,874), $(12,747), $(15,507), and $3,993, respectively	(9,100)	(40,367)	(49,107)	12,643
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 $1,203, $1,386, $2,361, and $2,702, respectively	3,808	4,393	7,477	8,558
Net change in unfunded pension liability
Change in unfunded pension liability related to unrealized gain and prior service cost, net of tax expense of $16, $17, $56, and $28, respectively	(52)	(54)	(176)	(89)
Net change in cash flow hedge
Net unrealized loss arising during the period, net of tax benefit of $185, $466, $2,217, and $361, respectively	(587)	(1,475)	(7,020)	(1,143)
Amortization of unrealized gain on terminated cash flow hedges, net of tax benefit of $—, $13, $—, and $25, respectively	0	(40)	0	(80)
Net change in cash flow hedge	(587)	(1,515)	(7,020)	(1,223)
Net change in equity method investments
Net change in other comprehensive income of equity method investments, net of tax benefit of $13, $32, $19, and $33, respectively	(40)	(101)	(61)	(104)
Net current-period other comprehensive income (loss)	(5,971)	(37,644)	(48,887)	19,785
Total comprehensive income	$ 63,302	$ 31,034	$ 86,147	$ 150,867