CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income		$ 60,902	$ 95,611	$ 64,869	$ 160,752
Less: Net income (loss) attributable to noncontrolling interest		162	(56)	325	3
Net income attributable to WSFS		60,740	95,667	64,544	160,749
Net change in unrealized (losses) gains on investment securities available-for-sale
Net unrealized (losses) gains arising during the period, net of tax (benefit) of $(26,975), $7,615, $(114,107), and $(14,361), respectively		(85,422)	24,104	(361,340)	(45,485)
Less: reclassification adjustment for net gains on sales realized in net income, net of tax expense of $—, $—, $— and $79, respectively		0	0	0	(250)
Net change in unrealized gains (losses) on investment securities available-for-sale		(85,422)	24,104	(361,340)	(45,735)
Net change in securities held-to-maturity
Net change in unrealized loss on securities reclassified to held-to-maturity, net of tax benefit of $37,830, $9 , $37,839 and $14, respectively	[1]	(119,796)	(28)	(119,824)	(44)
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), (8), $(17) and (13), respectively		(28)	(24)	(55)	(40)
Net change in cash flow hedge
Net unrealized gain arising during the period, net of tax expense of $—, $— , $— and $— respectively		0	0	1	0
Amortization of unrealized gain on terminated cash flow hedges, net of tax benefit of $13, $(35) , $(25) and $(70), respectively		(40)	(112)	(80)	(223)
Net change in cash flow hedge		(40)	(112)	(79)	(223)
Net change in equity method investments
Net change in other comprehensive income of equity method investments, net of tax expense of $59,$— , $59 and $86, respectively		188	0	188	273
Total other comprehensive (loss) income		(205,098)	23,940	(481,110)	(45,769)
Total comprehensive (loss) income		$ (144,358)	$ 119,607	$ (416,566)	$ 114,980

[1] Includes $119.8 million, net of tax benefit, of unrealized losses on transferred investment securities with a book value of $1.1 billion from available-for-sale to held-to-maturity.