CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands		Total	Common Stock	Capital in Excess of Par Value	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Treasury Stock	Treasury Stock Beneficial	Total Stockholders' Equity of WSFS	Non-controlling Interest
Beginning Balance at Dec. 31, 2017		$ 724,345	$ 563	$ 336,271	$ (8,152)	$ 669,557	$ (273,894)		$ 724,345
Beginning Balance (in shares) at Dec. 31, 2017			56,279,527
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		37,350				37,350			37,350
Other comprehensive income (loss)		(12,668)			(12,668)				(12,668)
Cash dividend		(2,826)				(2,826)			(2,826)
Issuance of common stock including proceeds from exercise of common stock options		2,613	$ 1	2,612					2,613
Issuance of common stock including proceeds from exercise of common stock options (in shares)			115,032
Stock-based compensation expense		946		946					946
Repurchase of common stock		$ (3,481)					(3,481)		3,481
Repurchase of common stock (in shares)		(70,000)	0
Ending Balance at Mar. 31, 2018		$ 746,279	$ 564	339,829	(20,820)	704,081	(277,375)		746,279
Ending Balance (in shares) at Mar. 31, 2018			56,394,559
Beginning Balance at Dec. 31, 2018		820,920	$ 569	349,810	(15,394)	791,031	(305,096)		820,920	$ 0
Beginning Balance (in shares) at Dec. 31, 2018			56,926,978
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		12,930				13,023			13,023	(93)
Other comprehensive income (loss)		17,650			17,650				17,650
Cash dividend		(3,451)				(3,451)			(3,451)
Issuance of common stock including proceeds from exercise of common stock options		236	$ 0	236					236
Re-issuance of treasury stock in connection with Beneficial merger and related items		949,895		687,898		(92)	262,071		949,877	18
Issuance of common stock including proceeds from exercise of common stock options (in shares)			14,515
Stock-based compensation expense		550		550					550
Repurchase of common stock	[1]	$ (9,053)					(9,053)		9,053
Repurchase of common stock (in shares)		(77,452)
Ending Balance at Mar. 31, 2019		$ 1,789,677	$ 569	$ 1,038,494	$ 2,256	$ 800,511	$ (52,078)		$ 1,789,752	$ (75)
Ending Balance (in shares) at Mar. 31, 2019			56,941,493
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock repurchased (in shares)	[1]						77,452	132,993

[1] Repurchase of common stock includes 77,452 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.