Loans and Leases - Allowance for Loan and Lease Losses by Portfolio Segment (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	$ 689,566	$ 635,737	$ 594,741
Provision (benefit)	209,048	220,743	143,209
Charge-offs	(189,290)	(176,470)	(117,212)
Recoveries	10,087	9,556	9,126
Balance, end of period	719,411	689,566	635,737
Individually evaluated for credit losses	79,995	68,706	48,194
Collectively evaluated for credit losses	639,416	620,860	587,543
Increase (decrease) in ACL on loans and leases		29,800
Adoption of ASU No. 2022-02
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	0	0	5,873
Balance, end of period		0	0
Commercial portfolio
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	635,871	577,663	533,125
Provision (benefit)	171,757	225,599	138,057
Charge-offs	(181,764)	(171,460)	(104,509)
Recoveries	5,513	4,069	3,286
Balance, end of period	631,377	635,871	577,663
Individually evaluated for credit losses	79,196	68,013	43,559
Collectively evaluated for credit losses	552,181	567,858	534,104
Commercial portfolio \| Adoption of ASU No. 2022-02
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	0	0	7,704
Balance, end of period		0	0
Consumer portfolio
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	53,695	58,074	61,616
Provision (benefit)	37,291	(4,856)	5,152
Charge-offs	(7,526)	(5,010)	(12,703)
Recoveries	4,574	5,487	5,840
Balance, end of period	88,034	53,695	58,074
Individually evaluated for credit losses	799	693	4,635
Collectively evaluated for credit losses	87,235	53,002	53,439
Consumer portfolio \| Adoption of ASU No. 2022-02
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	$ 0	0	(1,831)
Balance, end of period		$ 0	$ 0

Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Amount of allowance for credit loss on financing receivable evaluated on individual basis. Excludes financing receivable evaluated on collective basis.

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Amount of financing receivable collectively evaluated for credit loss. Excludes financing receivable individually evaluated for credit loss.

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Amount, excluding accrued interest, of increase in allowance for credit loss on financing receivable from recovery. Excludes net investment in lease.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Amount, excluding accrued interest, of decrease in allowance for credit loss on financing receivable from writeoff. Excludes net investment in lease.

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Amount, excluding accrued interest, of credit loss expense (reversal of expense) on financing receivable. Excludes net investment in lease.

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