Loans and Allowance for Credit Losses Summary Of Gross Loans (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 20,308,924,000	$ 18,342,386,000
Unearned income	(29,377,000)	(17,036,000)
Net loans	20,279,547,000	18,325,350,000
Real estate - commercial mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	7,693,835,000	7,279,080,000
Net loans	7,693,835,000	7,279,080,000
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	4,477,537,000	4,208,327,000
Net loans	4,477,537,000	4,208,327,000
Commercial and industrial \| PPP Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	20,400,000	301,300,000
Real estate - residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	4,737,279,000	3,846,750,000
Net loans	4,737,279,000	3,846,750,000
Real estate - home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,102,838,000	1,118,248,000
Net loans	1,102,838,000	1,118,248,000
Real-estate - construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	1,269,925,000	1,139,779,000
Net loans	1,269,925,000	1,139,779,000
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	699,179,000	464,657,000
Net loans	699,179,000	464,657,000
Finance Leases Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	324,928,000	283,557,000
Overdrafts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross loans	$ 3,403,000	$ 1,988,000

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Amount of deferred interest and fee income, unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of acquired loans. Excludes amounts for loans and leases covered under loss sharing agreements.

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Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

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