Summary of Nonaccrual Loans (Details) - USD ($) $ in Thousands		Dec. 31, 2020	Dec. 31, 2019
Financing Receivable Impaired [Line Items]
Tdrs Recorded Investment On Nonaccrual Status		$ 22,209	$ 24,766
Financing Receivable, Nonaccrual	[1]	66,860	45,892
Commercial and Industrial [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Nonaccrual		34,729	22,574
Commercial Real Estate [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Nonaccrual		10,195	3,016
Small Business [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Nonaccrual		825	311
Residential Real Estate [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Nonaccrual		15,528	13,360
Home Equity [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Nonaccrual		5,427	6,570
Consumer Portfolio Segment [Member]
Financing Receivable Impaired [Line Items]
Financing Receivable, Nonaccrual		$ 156	$ 61

[1] Included in these amounts are $22.2 million and $24.8 million of nonaccruing TDRs at December 31, 2020 and December 31, 2019, respectively.