Basis of Presentation - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2014 Subsidiary
Basis Of Presentation [Line Items]
Number of offices	52
WSFS Bank [Member]
Basis Of Presentation [Line Items]
Number of wholly-owned subsidiaries	2
WSFS Capital Trust III [Member]
Basis Of Presentation [Line Items]
Number of unconsolidated affiliate	1
Delaware [Member]
Basis Of Presentation [Line Items]
Number of offices	42
Pennsylvania [Member]
Basis Of Presentation [Line Items]
Number of offices	8
Virginia [Member]
Basis Of Presentation [Line Items]
Number of offices	1
Nevada [Member]
Basis Of Presentation [Line Items]
Number of offices	1