FAIR VALUE DISCLOSURES OF FINANCIAL ASSETS AND LIABILITIES - Schedule of Fair Value Measurement Inputs and Valuation Techniques (Details) - Significant Unobservable Inputs (Level 3) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2025 USD ($) $ / shares	Dec. 31, 2024 USD ($) $ / shares
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other investments \| $	$ 15,493	$ 15,516
Other real estate owned \| $	930	5,204
Other assets \| $	52	25
Risk participation agreements sold
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other liabilities, fair value \| $	205	90
Financial derivatives related to sales of certain Visa Class B shares
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other liabilities, fair value \| $	$ 3,335	$ 5,180
Measurement Input, Loss Given Default
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other assets, measurement input		0.30
Other liabilities, measurement input	0.30	0.30
Minimum \| Costs to sell
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other real estate owned, measurement input	0.100
Minimum \| Measurement Input, CDS Spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other assets, measurement input	0.0110	0.0110
Other liabilities, measurement input	0.0173	0.0001
Minimum \| Measurement Input, Loss Given Default
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other assets, measurement input		0
Maximum \| Costs to sell
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other real estate owned, measurement input	0.130
Maximum \| Measurement Input, CDS Spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other assets, measurement input	0.0360	0.0360
Other liabilities, measurement input	0.0350	0.0250
Maximum \| Measurement Input, Loss Given Default
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other assets, measurement input	0.02
Weighted Average \| Costs to sell
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other real estate owned, measurement input	0.115	0.100
Weighted Average \| Measurement Input, CDS Spread
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other assets, measurement input	0.0278	0.0192
Other liabilities, measurement input	0.0199	0.0207
Weighted Average \| Measurement Input, Loss Given Default
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other assets, measurement input		0.30
Weighted Average \| Timing of Visa litigation resolution
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other liabilities, measurement input, term	2 years	2 years 6 months

WSFS FINANCIAL CORP 10-Q