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

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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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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, 2024 USD ($) Loan	Sep. 30, 2023 USD ($) Loan	Sep. 30, 2024 USD ($) Loan	Sep. 30, 2023 USD ($) Loan	Dec. 31, 2023 USD ($)
Accounts Notes And Loans Receivable [Line Items]
Accrued interest	$ 114,300		$ 114,300		$ 124,700
Percentage of baseline economic forecast	40.00%	40.00%	40.00%	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	$ 82,866		$ 82,866		59,036
Loans held for sale	24,624		24,624		26,124
Modified Loans To Borrowers Experiencing Financial Difficulty [Member]
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual loans	5,400		5,400		100
Accruing and nonaccruing	95,600		95,600		24,500
Unfunded exposure to borrowers related to MEFD or TDR	$ 13,600		$ 13,600		700
Downside Mild Recessionary S-2 [Member]
Accounts Notes And Loans Receivable [Line Items]
Percentage of baseline economic forecast	60.00%	60.00%	60.00%	60.00%
Total Commercial [Member]
Accounts Notes And Loans Receivable [Line Items]
Number of contracts subsequently defaulted \| Loan	3		6
Recorded Investment	$ 3,600		$ 13,200
Residential Mortgages [Member]
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual loans	$ 39,112		$ 39,112		26,137
Number of contracts subsequently defaulted \| Loan	2	1	3	1
Recorded Investment	$ 300	$ 20	$ 400	$ 20
Loans carried at fair value option	23,500		23,500		13,300
Unpaid principal balance	22,900		22,900		12,900
Consumer [Member]
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual loans	$ 11,234		$ 11,234		8,555
Number of contracts subsequently defaulted \| Loan	1		1
Recorded Investment	$ 200		$ 200
Real estate in process of foreclosure	6,600		6,600		7,100
Real estate acquired through foreclosure	1,700		1,700		1,600
Total Commercial And Industrial [Member] \| Total Commercial [Member]
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual loans	24,286		24,286		23,068
Commercial Non-Real Estate [Member] \| Total Commercial And Industrial [Member] \| Total Commercial [Member]
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual loans	21,397		21,397		20,840
Commercial Real Estate - Owner Occupied [Member] \| Total Commercial And Industrial [Member] \| Total Commercial [Member]
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual loans	$ 2,889		$ 2,889		$ 2,228