CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands		Total		Beneficial	Impact of ASC 326 Adoption	As reported under ASC 326	Common Stock	Common Stock As reported under ASC 326	Capital in Excess of Par Value	Capital in Excess of Par Value As reported under ASC 326	Accumulated Other Comprehensive Income	Accumulated Other Comprehensive Income As reported under ASC 326	Retained Earnings	Retained Earnings Impact of ASC 326 Adoption	Retained Earnings As reported under ASC 326	Treasury Stock		Treasury Stock As reported under ASC 326	Total Stockholders' Equity of WSFS		Total Stockholders' Equity of WSFS Impact of ASC 326 Adoption	Total Stockholders' Equity of WSFS As reported under ASC 326	Non-controlling Interest	Non-controlling Interest As reported under ASC 326
Beginning Balance (in shares) at Dec. 31, 2018							56,926,978
Beginning 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 (loss)		48,899											49,223						49,223				(324)
Other comprehensive income (loss)		38,082									38,082								38,082
Cash dividend		(9,857)											(9,857)						(9,857)
Issuance of common stock including proceeds from exercise of common stock options (in shares)							312,705
Issuance of common stock including proceeds from exercise of common stock options		4,127					$ 4		4,123										4,127
Beneficial merger and related items		950,069							687,897							262,071			949,968				101
Stock-based compensation expense		1,235							1,235										1,235
Repurchases of common shares	[1]	(17,087)														(17,087)			(17,087)
Ending Balance (in shares) at Jun. 30, 2019							57,239,683
Ending Balance at Jun. 30, 2019		$ 1,836,388					$ 573		1,043,065		22,688		830,397			(60,112)			1,836,611				(223)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock repurchased (in shares)				132,993
Repurchase of common stock (in shares)		271,340
Beginning Balance (in shares) at Mar. 31, 2019							56,941,493
Beginning Balance at Mar. 31, 2019		$ 1,789,677					$ 569		1,038,494		2,256		800,511			(52,078)			1,789,752				(75)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		35,969											36,200						36,200				(231)
Other comprehensive income (loss)		20,432									20,432								20,432
Cash dividend		(6,406)											(6,406)						(6,406)
Issuance of common stock including proceeds from exercise of common stock options (in shares)							298,190
Issuance of common stock including proceeds from exercise of common stock options		3,890					$ 4		3,886										3,890
Beneficial merger and related items		175							0				92						92				83
Stock-based compensation expense		685							685										685
Repurchases of common shares	[1]	(8,034)														(8,034)			(8,034)
Ending Balance (in shares) at Jun. 30, 2019							57,239,683
Ending Balance at Jun. 30, 2019		$ 1,836,388					$ 573		1,043,065		22,688		830,397			(60,112)			1,836,611				(223)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchase of common stock (in shares)		193,888
Beginning Balance (in shares) at Dec. 31, 2019							57,435,658	57,435,658
Beginning Balance at Dec. 31, 2019		$ 1,849,491			$ (30,368)	$ 1,819,123	$ 575	$ 575	1,049,064	$ 1,049,064	23,501	$ 23,501	917,377	$ (30,368)	$ 887,009	(140,211)		$ (140,211)	1,850,306		$ (30,368)	$ 1,819,938	(815)	$ (815)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		2,756											3,816						3,816				(1,060)
Other comprehensive income (loss)		49,279									49,279								49,279
Cash dividend		(12,240)											(12,240)						(12,240)
Issuance of common stock including proceeds from exercise of common stock options (in shares)							97,578
Issuance of common stock including proceeds from exercise of common stock options		991					$ 1		990										991
Stock-based compensation expense		1,294							1,294										1,294
Repurchases of common shares		(39,409)	[2]						(670)							(38,739)	[2]		(39,409)	[2]
Ending Balance (in shares) at Jun. 30, 2020							57,533,236
Ending Balance at Jun. 30, 2020		$ 1,821,794					$ 576		1,050,678		72,780		878,585			$ (178,950)			1,823,669				(1,875)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock repurchased (in shares)																1,004,348
Shares withheld for tax liabilities (in shares)		22,531
Beginning Balance (in shares) at Mar. 31, 2020							57,506,298
Beginning Balance at Mar. 31, 2020		$ 1,833,419					$ 576		1,050,658		70,534		891,776			$ (178,950)			1,834,594				(1,175)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		(7,811)											(7,111)						(7,111)				(700)
Other comprehensive income (loss)		2,246									2,246								2,246
Cash dividend		(6,080)											(6,080)						(6,080)
Issuance of common stock including proceeds from exercise of common stock options (in shares)							26,938
Issuance of common stock including proceeds from exercise of common stock options		0					$ 0		0										0
Stock-based compensation expense		690							690										690
Repurchases of common shares		(670)	[2]						(670)										(670)	[2]
Ending Balance (in shares) at Jun. 30, 2020							57,533,236
Ending Balance at Jun. 30, 2020		$ 1,821,794					$ 576		$ 1,050,678		$ 72,780		$ 878,585			$ (178,950)			$ 1,823,669				$ (1,875)

[1] Repurchase of common stock includes 271,340 shares repurchased in connection with the Company's share repurchase 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.⁽²⁾Repurchase of common stock includes 193,888 shares repurchased in connection with the Company's share repurchase program approved by the Board of Directors.

[2] Repurchase of common stock includes 1,004,348 shares repurchased in connection with the Company's share repurchase program approved by the Board of Directors, and 22,531 shares withheld to cover tax liabilities.