Loans and Leases - Summary Of Loan And Lease Portfolio Aging By Class Of Loan (Detail) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Financing Receivable, Past Due [Line Items]
Loans and leases	$ 53,671,959	$ 52,505,168
90 or More Days Past Due and Accruing	0	0
Non-accrual	534,155	460,725
Non-accrual with No Allowance	139,474	117,602
Commercial portfolio
Financing Receivable, Past Due [Line Items]
Loans and leases	42,651,878	42,068,001
90 or More Days Past Due and Accruing	0	0
Non-accrual	499,301	426,426
Non-accrual with No Allowance	122,335	98,451
Commercial portfolio | Commercial non-mortgage
Financing Receivable, Past Due [Line Items]
Loans and leases	18,724,821	18,037,942
90 or More Days Past Due and Accruing	0	0
Non-accrual	216,003	248,078
Non-accrual with No Allowance	42,997	50,943
Commercial portfolio | Asset-based
Financing Receivable, Past Due [Line Items]
Loans and leases	1,350,006	1,404,007
90 or More Days Past Due and Accruing	0	0
Non-accrual	44,353	20,787
Non-accrual with No Allowance	18,262	1,080
Commercial portfolio | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans and leases	14,539,706	14,492,436
90 or More Days Past Due and Accruing	0	0
Non-accrual	200,947	120,151
Non-accrual with No Allowance	37,160	26,666
Commercial portfolio | Multi-family
Financing Receivable, Past Due [Line Items]
Loans and leases	6,819,069	6,898,600
90 or More Days Past Due and Accruing	0	0
Non-accrual	23,009	18,043
Non-accrual with No Allowance	22,877	17,953
Commercial portfolio | Equipment financing
Financing Receivable, Past Due [Line Items]
Loans and leases	1,218,276	1,235,016
90 or More Days Past Due and Accruing	0	0
Non-accrual	14,989	19,367
Non-accrual with No Allowance	1,039	1,809
Consumer portfolio
Financing Receivable, Past Due [Line Items]
Loans and leases	11,020,081	10,437,167
90 or More Days Past Due and Accruing	0	0
Non-accrual	34,854	34,299
Non-accrual with No Allowance	17,139	19,151
Consumer portfolio | Residential
Financing Receivable, Past Due [Line Items]
Loans and leases	9,332,413	8,853,669
90 or More Days Past Due and Accruing	0	0
Non-accrual	16,024	12,750
Non-accrual with No Allowance	7,223	6,923
Consumer portfolio | Home equity
Financing Receivable, Past Due [Line Items]
Loans and leases	1,385,746	1,427,692
90 or More Days Past Due and Accruing	0	0
Non-accrual	18,421	21,425
Non-accrual with No Allowance	9,914	12,225
Consumer portfolio | Other consumer
Financing Receivable, Past Due [Line Items]
Loans and leases	301,922	155,806
90 or More Days Past Due and Accruing	0	0
Non-accrual	409	124
Non-accrual with No Allowance	2	3
Total  Past Due and Non-accrual
Financing Receivable, Past Due [Line Items]
Loans and leases	589,107	574,307
Total  Past Due and Non-accrual | Commercial portfolio
Financing Receivable, Past Due [Line Items]
Loans and leases	532,054	516,644
Total  Past Due and Non-accrual | Commercial portfolio | Commercial non-mortgage
Financing Receivable, Past Due [Line Items]
Loans and leases	231,485	255,345
Total  Past Due and Non-accrual | Commercial portfolio | Asset-based
Financing Receivable, Past Due [Line Items]
Loans and leases	44,353	42,784
Total  Past Due and Non-accrual | Commercial portfolio | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans and leases	207,559	142,824
Total  Past Due and Non-accrual | Commercial portfolio | Multi-family
Financing Receivable, Past Due [Line Items]
Loans and leases	32,754	46,928
Total  Past Due and Non-accrual | Commercial portfolio | Equipment financing
Financing Receivable, Past Due [Line Items]
Loans and leases	15,903	28,763
Total  Past Due and Non-accrual | Consumer portfolio
Financing Receivable, Past Due [Line Items]
Loans and leases	57,053	57,663
Total  Past Due and Non-accrual | Consumer portfolio | Residential
Financing Receivable, Past Due [Line Items]
Loans and leases	28,677	26,949
Total  Past Due and Non-accrual | Consumer portfolio | Home equity
Financing Receivable, Past Due [Line Items]
Loans and leases	26,837	30,079
Total  Past Due and Non-accrual | Consumer portfolio | Other consumer
Financing Receivable, Past Due [Line Items]
Loans and leases	1,539	635
30-59 Days Past Due and Accruing
Financing Receivable, Past Due [Line Items]
Loans and leases	47,301	50,885
30-59 Days Past Due and Accruing | Commercial portfolio
Financing Receivable, Past Due [Line Items]
Loans and leases	31,597	34,668
30-59 Days Past Due and Accruing | Commercial portfolio | Commercial non-mortgage
Financing Receivable, Past Due [Line Items]
Loans and leases	14,902	3,949
30-59 Days Past Due and Accruing | Commercial portfolio | Asset-based
Financing Receivable, Past Due [Line Items]
Loans and leases	0	0
30-59 Days Past Due and Accruing | Commercial portfolio | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans and leases	6,267	22,115
30-59 Days Past Due and Accruing | Commercial portfolio | Multi-family
Financing Receivable, Past Due [Line Items]
Loans and leases	9,745	2,508
30-59 Days Past Due and Accruing | Commercial portfolio | Equipment financing
Financing Receivable, Past Due [Line Items]
Loans and leases	683	6,096
30-59 Days Past Due and Accruing | Consumer portfolio
Financing Receivable, Past Due [Line Items]
Loans and leases	15,704	16,217
30-59 Days Past Due and Accruing | Consumer portfolio | Residential
Financing Receivable, Past Due [Line Items]
Loans and leases	8,884	9,595
30-59 Days Past Due and Accruing | Consumer portfolio | Home equity
Financing Receivable, Past Due [Line Items]
Loans and leases	6,077	6,273
30-59 Days Past Due and Accruing | Consumer portfolio | Other consumer
Financing Receivable, Past Due [Line Items]
Loans and leases	743	349
60-89 Days Past Due and Accruing
Financing Receivable, Past Due [Line Items]
Loans and leases	7,651	62,697
60-89 Days Past Due and Accruing | Commercial portfolio
Financing Receivable, Past Due [Line Items]
Loans and leases	1,156	55,550
60-89 Days Past Due and Accruing | Commercial portfolio | Commercial non-mortgage
Financing Receivable, Past Due [Line Items]
Loans and leases	580	3,318
60-89 Days Past Due and Accruing | Commercial portfolio | Asset-based
Financing Receivable, Past Due [Line Items]
Loans and leases	0	21,997
60-89 Days Past Due and Accruing | Commercial portfolio | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans and leases	345	558
60-89 Days Past Due and Accruing | Commercial portfolio | Multi-family
Financing Receivable, Past Due [Line Items]
Loans and leases	0	26,377
60-89 Days Past Due and Accruing | Commercial portfolio | Equipment financing
Financing Receivable, Past Due [Line Items]
Loans and leases	231	3,300
60-89 Days Past Due and Accruing | Consumer portfolio
Financing Receivable, Past Due [Line Items]
Loans and leases	6,495	7,147
60-89 Days Past Due and Accruing | Consumer portfolio | Residential
Financing Receivable, Past Due [Line Items]
Loans and leases	3,769	4,604
60-89 Days Past Due and Accruing | Consumer portfolio | Home equity
Financing Receivable, Past Due [Line Items]
Loans and leases	2,339	2,381
60-89 Days Past Due and Accruing | Consumer portfolio | Other consumer
Financing Receivable, Past Due [Line Items]
Loans and leases	387	162
Current
Financing Receivable, Past Due [Line Items]
Loans and leases	53,082,852	51,930,861
Current | Commercial portfolio
Financing Receivable, Past Due [Line Items]
Loans and leases	42,119,824	41,551,357
Current | Commercial portfolio | Commercial non-mortgage
Financing Receivable, Past Due [Line Items]
Loans and leases	18,493,336	17,782,597
Current | Commercial portfolio | Asset-based
Financing Receivable, Past Due [Line Items]
Loans and leases	1,305,653	1,361,223
Current | Commercial portfolio | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans and leases	14,332,147	14,349,612
Current | Commercial portfolio | Multi-family
Financing Receivable, Past Due [Line Items]
Loans and leases	6,786,315	6,851,672
Current | Commercial portfolio | Equipment financing
Financing Receivable, Past Due [Line Items]
Loans and leases	1,202,373	1,206,253
Current | Consumer portfolio
Financing Receivable, Past Due [Line Items]
Loans and leases	10,963,028	10,379,504
Current | Consumer portfolio | Residential
Financing Receivable, Past Due [Line Items]
Loans and leases	9,303,736	8,826,720
Current | Consumer portfolio | Home equity
Financing Receivable, Past Due [Line Items]
Loans and leases	1,358,909	1,397,613
Current | Consumer portfolio | Other consumer
Financing Receivable, Past Due [Line Items]
Loans and leases	$ 300,383	155,171
In Process | Commercial portfolio
Financing Receivable, Past Due [Line Items]
Loans and leases		$ 32,700