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Financing receivable modifications subsequent default number of contracts.

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Impaired financing receivables unpaid principal balance.

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Loans and leases accrued interest.

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Percentage of baseline economic forecast.

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Reportable modification period.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Accumulated amortized cost of financing receivable modified for debtor experiencing financial difficulty.

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Amortized cost of financing receivable with payment default in current period and modified within previous 12 months preceding payment default for debtor experiencing financial difficulty.

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- Definition

Amortized cost of financing receivable on nonaccrual status. Excludes net investment in lease.

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- Definition

Amount of commitment to lend additional funds to debtor experiencing financial difficulty for which creditor has modified terms of financing receivable.

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Amount, before valuation allowance, of financing receivable classified as held-for-sale.

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Amount, after valuation allowance, of financing receivable held for sale and not part of disposal group. Excludes loan covered under loss sharing agreement and loan classified as investment in debt security.

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Recorded investment of consumer mortgage loan receivables secured by residential real estate properties for which formal foreclosure proceedings are in process.

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Carrying amount as of the balance sheet date of land and buildings obtained through foreclosure proceedings or defeasance in full or partial satisfaction of a debt arrangement.

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Loans and Allowance for Credit Losses (Narrative) (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($) Loan	Sep. 30, 2024 USD ($) Loan	Sep. 30, 2025 USD ($) Loan	Sep. 30, 2024 USD ($) Loan	Dec. 31, 2024 USD ($)
Accounts Notes And Loans Receivable [Line Items]
Accrued interest	$ 107,600		$ 107,600		$ 109,800
Percentage of baseline economic forecast	50.00%	40.00%	50.00%	40.00%
Description of post modification defaults			A payment default occurs if the loan is either 90 days or more delinquent or has been charged off as of the end of the period presented.
Nonaccrual loans	$ 113,554		$ 113,554		97,335
Loans held for sale	33,161		33,161		21,525
Modified Loans To Borrowers Experiencing Financial Difficulty [Member]
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual loans	9,300		9,300		20,200
Accruing and nonaccruing	91,500		91,500		99,500
Unfunded exposure to borrowers related to MEFD or TDR	$ 4,700		$ 4,700		6,900
Downside Mild Recessionary S-2 [Member]
Accounts Notes And Loans Receivable [Line Items]
Percentage of baseline economic forecast	50.00%	60.00%	50.00%	60.00%
Total Commercial [Member]
Accounts Notes And Loans Receivable [Line Items]
Number of contracts subsequently defaulted \| Loan	2	3	7	6
Recorded Investment	$ 3,300	$ 3,600	$ 27,600	$ 13,200
Residential Mortgages [Member]
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual loans	41,026		41,026		44,086
Number of contracts subsequently defaulted \| Loan		2		3
Recorded Investment		$ 300		$ 400
Loans carried at fair value option	33,200		33,200		18,900
Unpaid principal balance	32,300		32,300		18,600
Consumer [Member]
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual loans	$ 10,265		$ 10,265		11,187
Number of contracts subsequently defaulted \| Loan	1	1	2	1
Recorded Investment	$ 100	$ 200	$ 200	$ 200
Real estate in process of foreclosure	13,000		13,000		10,500
Real estate acquired through foreclosure	$ 3,700		$ 3,700		2,000
Weighted Average [Member] \| Total Commercial [Member] \| Term Extension [Member]
Accounts Notes And Loans Receivable [Line Items]
Reportable modification period	7 months	9 months	11 months	9 months
Weighted Average [Member] \| Total Commercial [Member] \| Other Than Insignificant Payment Delays [Member]
Accounts Notes And Loans Receivable [Line Items]
Reportable modification period		3 months	4 months	3 months
Weighted Average [Member] \| Residential Mortgages [Member] \| Term Extension [Member]
Accounts Notes And Loans Receivable [Line Items]
Reportable modification period	3 years	2 years	18 months	5 years
Weighted Average [Member] \| Residential Mortgages [Member] \| Other Than Insignificant Payment Delays [Member]
Accounts Notes And Loans Receivable [Line Items]
Reportable modification period	1 year		10 months
Weighted Average [Member] \| Consumer [Member] \| Term Extension [Member]
Accounts Notes And Loans Receivable [Line Items]
Reportable modification period	3 years		31 months	4 years
Weighted Average [Member] \| Consumer [Member] \| Other Than Insignificant Payment Delays [Member]
Accounts Notes And Loans Receivable [Line Items]
Reportable modification period	7 months		7 months
Total Commercial And Industrial [Member] \| Total Commercial [Member]
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual loans	$ 54,200		$ 54,200		36,145
Commercial Non-Real Estate [Member] \| Total Commercial And Industrial [Member] \| Total Commercial [Member]
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual loans	47,192		47,192		33,418
Commercial Real Estate - Owner Occupied [Member] \| Total Commercial And Industrial [Member] \| Total Commercial [Member]
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual loans	$ 7,008		$ 7,008		$ 2,727