Loans and Leases - Allowance for Loan and Lease Losses by Portfolio Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	$ 713,321	$ 641,442	$ 689,566	$ 635,737	$ 635,737
Provision (benefit)	45,126	61,041	123,838	104,235
Charge-offs	(41,238)	(34,774)	(97,856)	(74,565)
Recoveries	4,837	1,646	6,498	3,948
Balance, end of period	722,046	669,355	722,046	669,355	689,566
Individually evaluated for credit losses	96,134	67,592	96,134	67,592
Collectively evaluated for credit losses	625,912	601,763	625,912	601,763
Increase in ACL on loans and leases			32,400
Commercial portfolio
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	649,450	589,109	635,871	577,663	577,663
Provision (benefit)	45,635	65,607	113,838	114,961
Charge-offs	(39,792)	(33,356)	(95,358)	(71,817)	(171,460)
Recoveries	3,250	360	4,192	913
Balance, end of period	658,543	621,720	658,543	621,720	635,871
Individually evaluated for credit losses	95,323	66,943	95,323	66,943
Collectively evaluated for credit losses	563,220	554,777	563,220	554,777
Consumer portfolio
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	63,871	52,333	53,695	58,074	58,074
Provision (benefit)	(509)	(4,566)	10,000	(10,726)
Charge-offs	(1,446)	(1,418)	(2,498)	(2,748)	(5,010)
Recoveries	1,587	1,286	2,306	3,035
Balance, end of period	63,503	47,635	63,503	47,635	$ 53,695
Individually evaluated for credit losses	811	649	811	649
Collectively evaluated for credit losses	$ 62,692	$ 46,986	$ 62,692	$ 46,986