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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Statement of Comprehensive Income [Abstract]        
Net income $ 84,329 $ 72,221 $ 171,174 $ 138,088
Less: Net loss attributable to noncontrolling interest (69) (105) (51) (134)
Net income attributable to WSFS 84,398 72,326 171,225 138,222
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 $(2,733), $7,165, $(5,488), and $29,282, respectively (8,655) 22,688 (17,380) 92,725
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 $917, $1,032, $1,822, and $2,038, respectively 2,904 3,267 5,771 6,455
Net change in unfunded pension liability        
Change in unfunded pension liability related to unrealized gain and prior service cost, net of tax benefit of $28, $19, $209, and $39, respectively (88) (61) (663) (122)
Net change in cash flow hedge        
Net unrealized (loss) gain arising during the period, net of tax (benefit) expense of $(1,971), $455, $(2,631), and $1,363, respectively (6,241) 1,440 (8,333) 4,315
Net change in equity method investments        
Net change in other comprehensive income of equity method investments, net of tax benefit of $18, $5, $23, and $206, respectively (57) (16) (72) (652)
Total other comprehensive (loss) income (12,137) 27,318 (20,677) 102,721
Total comprehensive income $ 72,261 $ 99,644 $ 150,548 $ 240,943