Segment Information - Details of Segment Information (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Segment Reporting Information [Line Items]
Capital expenditures	$ 1,233	$ 734
Scenario, Previously Reported [Member]
Segment Reporting Information [Line Items]
Capital expenditures	817
WSFS Bank [Member]
Segment Reporting Information [Line Items]
Capital expenditures	1,211	497
WSFS Bank [Member] | Scenario, Previously Reported [Member]
Segment Reporting Information [Line Items]
Capital expenditures	817
Cash Connect [Member]
Segment Reporting Information [Line Items]
Capital expenditures	20	234
Cash Connect [Member] | Scenario, Previously Reported [Member]
Segment Reporting Information [Line Items]
Capital expenditures	0
Wealth Management [Member]
Segment Reporting Information [Line Items]
Capital expenditures	2	$ 3
Wealth Management [Member] | Scenario, Previously Reported [Member]
Segment Reporting Information [Line Items]
Capital expenditures	$ 0