Segment Information - Details of Segment Information (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Segment Reporting Information [Line Items]
Capital expenditures	$ 2,645	$ 2,082	$ 3,878	$ 2,816
Scenario, Previously Reported [Member]
Segment Reporting Information [Line Items]
Capital expenditures		2,882		3,699
WSFS Bank [Member]
Segment Reporting Information [Line Items]
Capital expenditures	2,235	1,083	3,446	1,580
WSFS Bank [Member] | Scenario, Previously Reported [Member]
Segment Reporting Information [Line Items]
Capital expenditures		299		1,116
Cash Connect [Member]
Segment Reporting Information [Line Items]
Capital expenditures	404	987	424	1,221
Cash Connect [Member] | Scenario, Previously Reported [Member]
Segment Reporting Information [Line Items]
Capital expenditures		2,570		2,570
Wealth Management [Member]
Segment Reporting Information [Line Items]
Capital expenditures	$ 6	12	$ 8	15
Wealth Management [Member] | Scenario, Previously Reported [Member]
Segment Reporting Information [Line Items]
Capital expenditures		$ 13		$ 13