CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 35,969	$ 28,740	$ 48,899	$ 66,090
Less: Net loss attributable to noncontrolling interest	(231)	0	(324)	0
Net income attributable to WSFS	36,200	28,740	49,223	66,090
Net change in unrealized gains (loss) on investment securities available for sale
Net unrealized gains (loss) arising during the period, net of tax (benefit) expense of $6,289 and ($1,398), $11,831, and ($5,112), respectively	19,591	(4,501)	36,856	(16,328)
Less: reclassification adjustment for net gains on sales realized in net income, net of tax expense of $15, $0, $19 and $5, respectively	(48)	0	(59)	(16)
Net change in unrealized gains (losses) on investment securities available-for-sale	19,543	(4,501)	36,797	(16,344)
Net change in securities held to maturity
Amortization of unrealized gain on securities reclassified to held-to-maturity, net of tax expense of $27, $36, $56, and $73, respectively	(84)	(117)	(177)	(236)
Net change in unfunded pension liability
Change in unfunded pension liability related to unrealized (loss) gain, prior service cost and transition obligation, net of tax (benefit) expense of ($8), ($9), ($17) and $9, respectively	(34)	(30)	(175)	29
Net change in cash flow hedge
Net unrealized gain (loss) arising during the period, net of tax expense (benefit) of $323, ($76), $525 and ($316) respectively		(245)		(1,010)
Net unrealized gain (loss) arising during the period, net of tax expense (benefit) of $323, ($76), $525 and ($316) respectively	1,007		1,637
Total other comprehensive income (loss)	20,432	(4,893)	38,082	(17,561)
Total comprehensive income	$ 56,632	$ 23,847	$ 87,305	$ 48,529