Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands		Total	Common Stock	Capital in Excess of Par Value	Accumulated Other Comprehensive (Loss) Income	Retained Earnings	Treasury Stock	Treasury Stock Beneficial	Total Stockholders’ Equity of WSFS	Non-controlling Interest
Beginning Balance (in shares) at Dec. 31, 2016			55,995,219
Beginning balance at Dec. 31, 2016		$ 687,336	$ 580	$ 329,457	$ (7,617)	$ 627,078	$ (262,162)		$ 687,336
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		50,244				50,244			50,244	$ 0
Other comprehensive income (loss)		1,125			1,125				1,125
Cash dividend		(9,425)				(9,425)			(9,425)
Issuance of common stock including proceeds from exercise of common stock options (in shares)			284,308
Issuance of common stock including proceeds from exercise of common stock options		3,421	$ 3	3,418					3,421
Stock-based compensation expense		3,396		3,396					3,396
Repurchases of common stock		(11,752)	$ 20				(11,732)		(11,752)
Ending Balance (in shares) at Dec. 31, 2017			56,279,527
Ending balance at Dec. 31, 2017		724,345	$ 563	336,271	(8,152)	669,557	(273,894)		724,345
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		134,743				134,743			134,743	0
Other comprehensive income (loss)		(7,242)			(7,262)				(7,262)
Cash dividend		(13,249)				(13,249)			(13,249)
Issuance of common stock including proceeds from exercise of common stock options (in shares)			647,451
Issuance of common stock including proceeds from exercise of common stock options		11,253	$ 6	11,247					11,253
Stock-based compensation expense		2,292		2,292					2,292
Repurchases of common stock		(31,202)					(31,202)		(31,202)
Ending Balance (in shares) at Dec. 31, 2018			56,926,978
Ending balance at Dec. 31, 2018		820,920	$ 569	349,810	(15,394)	791,031	(305,096)		820,920	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		147,918				148,809			148,809	(891)
Other comprehensive income (loss)		38,895			38,895				38,895
Cash dividend		(22,463)				(22,463)			(22,463)
Issuance of common stock including proceeds from exercise of common stock options (in shares)			508,680
Issuance of common stock including proceeds from exercise of common stock options		7,755	$ 6	7,749					7,755
Re-issuance of treasury stock in connection with BNCL merger and related items		950,044		687,897			262,071		949,968	76
Stock-based compensation expense		3,608		3,608					3,608
Repurchases of common stock	[1]	(97,186)					(97,186)		(97,186)
Ending Balance (in shares) at Dec. 31, 2019			57,435,658
Ending balance at Dec. 31, 2019		$ 1,849,491	$ 575	$ 1,049,064	$ 23,501	$ 917,377	$ (140,211)		$ 1,850,306	$ (815)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock repurchased (in shares)							2,132,390	132,993

[1] Repurchase of common stock includes 2,132,390 shares repurchased in connection with the Company's share buyback program approved by the Board of Directors, and 132,993 shares repurchased to cover taxes due on the consideration transferred in the Beneficial acquisition related to the vesting of unrestricted Beneficial stock awards.