Loans - Summary of Breakout of Commercial Deferrals (Details) - TDRs [Member] $ in Thousands	Sep. 30, 2020 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial deferral expirations balance	$ 434,555
July [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial deferral expirations balance	277,010
August [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial deferral expirations balance	123,851
September [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial deferral expirations balance	12,226
October [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial deferral expirations balance	14,000
November [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial deferral expirations balance	5,076
December [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial deferral expirations balance	$ 2,392