Restrictions on Cash and Due from Banks and Interest-earning Deposit Accounts	12 Months Ended
	Dec. 31, 2020
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Restrictions on Cash and Due from Banks and Interest-earning Deposit Accounts	Restrictions on Cash and Due from Banks and Interest-earning Deposit AccountsThe Bank maintains reserve balances under Federal Reserve Bank requirements. There was no reserve requirement at December 31, 2020 as a result of the Federal Reserve Board reducing the reserve requirement ratios to zero during the first quarter of 2020. The reserve requirement at December 31, 2019 was $11.1 million and was satisfied by vault cash held at the Bank's branches. The average balances at the Federal Reserve Bank of Philadelphia were $270.7 million and $138.4 million for the years ended December 31, 2020 and 2019, respectively. The Corporation maintains interest-earning deposit accounts at other financial institutions and pledges certain deposits as collateral for credit derivatives and interest rate swap agreements. At December 31, 2020, the Corporation had $100 thousand of deposits pledged for interest rate swap agreements. At December 31, 2019, the Corporation had no deposits pledged for credit derivatives and interest rate swap agreements. See Note 17, "Derivative Instruments and Hedging Activities" for additional information.