CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 76,467	$ 64,409	$ 214,555	$ 199,340
Less: Net income (loss) attributable to noncontrolling interest	18	(26)	(116)	(129)
Net income attributable to WSFS	76,449	64,435	214,671	199,469
Net change in unrealized gains on investment securities available-for-sale
Net unrealized gains arising during the period, net of tax expense of $14,019, $40,491, $43,301, and $24,984, respectively	44,395	128,223	137,120	79,116
Net change in securities held-to-maturity
Amortization of net unrealized losses on available-for-sale securities reclassified to held-to-maturity, net of tax expense of $1,063, $1,252, $3,103, and $3,613, respectively	3,370	3,965	9,825	11,442
Net change in unfunded pension liability
Change in unfunded pension liability related to unrealized gain and prior service cost, net of tax benefit of $20 and $17, $58, and $72, respectively	(62)	(53)	(184)	(229)
Net change in cash flow hedge
Net unrealized (loss) gain arising during the period, net of tax (benefit) expense of $(68), $3,386, $1,295, and $1,169, respectively	(215)	10,722	4,100	3,702
Net change in equity method investments
Net change in other comprehensive income of equity method investments, net of tax (benefit) expense of $(7), $1, $(213), and $(18), respectively	(21)	4	(673)	(57)
Total other comprehensive income	47,467	142,861	150,188	93,974
Total comprehensive income	$ 123,916	$ 207,296	$ 364,859	$ 293,443