CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 12,930	$ 37,350
Less: Net loss attributable to noncontrolling interest	(93)	0
Net income attributable to WSFS	13,023	37,350
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 $5,452 and $3,714, respectively	17,265	(11,827)
Less: reclassification adjustment for net gains on sales realized in net income, net of tax expense of $4 and $5, respectively	(11)	(16)
Net change in unrealized gains (losses) on investment securities available-for-sale	17,254	(11,843)
Net change in securities held to maturity
Amortization of unrealized gain on securities reclassified to held-to-maturity, net of tax expense of $29 and $37, respectively	(93)	(119)
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) and ($11), respectively	(141)	59
Net change in cash flow hedge
Net unrealized gain (loss) arising during the period, net of tax expense (benefit) of $199 and ($240) respectively	630	(765)
Total other comprehensive income (loss)	17,650	(12,668)
Total comprehensive income	$ 30,673	$ 24,682