Loans and Leases - Summary Of Loan And Lease Portfolio Aging By Class Of Loan (Detail) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Financing Receivable, Past Due [Line Items]
Loans and leases	$ 53,056,223	$ 52,505,168
90 or More Days Past Due and Accruing	507	0
Non-accrual	563,747	460,725
Non-accrual with No Allowance	162,113	117,602
Commercial portfolio
Financing Receivable, Past Due [Line Items]
Loans and leases	42,263,970	42,068,001
90 or More Days Past Due and Accruing	507	0
Non-accrual	527,996	426,426
Non-accrual with No Allowance	144,103	98,451
Commercial portfolio | Commercial non-mortgage
Financing Receivable, Past Due [Line Items]
Loans and leases	18,266,697	18,037,942
90 or More Days Past Due and Accruing	145	0
Non-accrual	259,491	248,078
Non-accrual with No Allowance	65,707	50,943
Commercial portfolio | Asset-based
Financing Receivable, Past Due [Line Items]
Loans and leases	1,385,042	1,404,007
90 or More Days Past Due and Accruing	0	0
Non-accrual	42,140	20,787
Non-accrual with No Allowance	18,297	1,080
Commercial portfolio | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans and leases	14,486,748	14,492,436
90 or More Days Past Due and Accruing	362	0
Non-accrual	188,844	120,151
Non-accrual with No Allowance	42,022	26,666
Commercial portfolio | Multi-family
Financing Receivable, Past Due [Line Items]
Loans and leases	6,896,396	6,898,600
90 or More Days Past Due and Accruing	0	0
Non-accrual	17,953	18,043
Non-accrual with No Allowance	17,953	17,953
Commercial portfolio | Equipment financing
Financing Receivable, Past Due [Line Items]
Loans and leases	1,229,087	1,235,016
90 or More Days Past Due and Accruing	0	0
Non-accrual	19,568	19,367
Non-accrual with No Allowance	124	1,809
Consumer portfolio
Financing Receivable, Past Due [Line Items]
Loans and leases	10,792,253	10,437,167
90 or More Days Past Due and Accruing	0	0
Non-accrual	35,751	34,299
Non-accrual with No Allowance	18,010	19,151
Consumer portfolio | Residential
Financing Receivable, Past Due [Line Items]
Loans and leases	9,123,000	8,853,669
90 or More Days Past Due and Accruing	0	0
Non-accrual	16,040	12,750
Non-accrual with No Allowance	6,254	6,923
Consumer portfolio | Home equity
Financing Receivable, Past Due [Line Items]
Loans and leases	1,392,129	1,427,692
90 or More Days Past Due and Accruing	0	0
Non-accrual	19,546	21,425
Non-accrual with No Allowance	11,754	12,225
Consumer portfolio | Other consumer
Financing Receivable, Past Due [Line Items]
Loans and leases	277,124	155,806
90 or More Days Past Due and Accruing	0	0
Non-accrual	165	124
Non-accrual with No Allowance	2	3
Total  Past Due and Non-accrual
Financing Receivable, Past Due [Line Items]
Loans and leases	651,134	574,307
Total  Past Due and Non-accrual | Commercial portfolio
Financing Receivable, Past Due [Line Items]
Loans and leases	589,041	516,644
Total  Past Due and Non-accrual | Commercial portfolio | Commercial non-mortgage
Financing Receivable, Past Due [Line Items]
Loans and leases	278,092	255,345
Total  Past Due and Non-accrual | Commercial portfolio | Asset-based
Financing Receivable, Past Due [Line Items]
Loans and leases	42,140	42,784
Total  Past Due and Non-accrual | Commercial portfolio | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans and leases	218,416	142,824
Total  Past Due and Non-accrual | Commercial portfolio | Multi-family
Financing Receivable, Past Due [Line Items]
Loans and leases	21,910	46,928
Total  Past Due and Non-accrual | Commercial portfolio | Equipment financing
Financing Receivable, Past Due [Line Items]
Loans and leases	28,483	28,763
Total  Past Due and Non-accrual | Consumer portfolio
Financing Receivable, Past Due [Line Items]
Loans and leases	62,093	57,663
Total  Past Due and Non-accrual | Consumer portfolio | Residential
Financing Receivable, Past Due [Line Items]
Loans and leases	32,453	26,949
Total  Past Due and Non-accrual | Consumer portfolio | Home equity
Financing Receivable, Past Due [Line Items]
Loans and leases	28,819	30,079
Total  Past Due and Non-accrual | Consumer portfolio | Other consumer
Financing Receivable, Past Due [Line Items]
Loans and leases	821	635
30-59 Days Past Due and Accruing
Financing Receivable, Past Due [Line Items]
Loans and leases	68,786	50,885
30-59 Days Past Due and Accruing | Commercial portfolio
Financing Receivable, Past Due [Line Items]
Loans and leases	49,245	34,668
30-59 Days Past Due and Accruing | Commercial portfolio | Commercial non-mortgage
Financing Receivable, Past Due [Line Items]
Loans and leases	10,636	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	28,421	22,115
30-59 Days Past Due and Accruing | Commercial portfolio | Multi-family
Financing Receivable, Past Due [Line Items]
Loans and leases	3,818	2,508
30-59 Days Past Due and Accruing | Commercial portfolio | Equipment financing
Financing Receivable, Past Due [Line Items]
Loans and leases	6,370	6,096
30-59 Days Past Due and Accruing | Consumer portfolio
Financing Receivable, Past Due [Line Items]
Loans and leases	19,541	16,217
30-59 Days Past Due and Accruing | Consumer portfolio | Residential
Financing Receivable, Past Due [Line Items]
Loans and leases	12,068	9,595
30-59 Days Past Due and Accruing | Consumer portfolio | Home equity
Financing Receivable, Past Due [Line Items]
Loans and leases	6,979	6,273
30-59 Days Past Due and Accruing | Consumer portfolio | Other consumer
Financing Receivable, Past Due [Line Items]
Loans and leases	494	349
60-89 Days Past Due and Accruing
Financing Receivable, Past Due [Line Items]
Loans and leases	18,094	62,697
60-89 Days Past Due and Accruing | Commercial portfolio
Financing Receivable, Past Due [Line Items]
Loans and leases	11,293	55,550
60-89 Days Past Due and Accruing | Commercial portfolio | Commercial non-mortgage
Financing Receivable, Past Due [Line Items]
Loans and leases	7,820	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	789	558
60-89 Days Past Due and Accruing | Commercial portfolio | Multi-family
Financing Receivable, Past Due [Line Items]
Loans and leases	139	26,377
60-89 Days Past Due and Accruing | Commercial portfolio | Equipment financing
Financing Receivable, Past Due [Line Items]
Loans and leases	2,545	3,300
60-89 Days Past Due and Accruing | Consumer portfolio
Financing Receivable, Past Due [Line Items]
Loans and leases	6,801	7,147
60-89 Days Past Due and Accruing | Consumer portfolio | Residential
Financing Receivable, Past Due [Line Items]
Loans and leases	4,345	4,604
60-89 Days Past Due and Accruing | Consumer portfolio | Home equity
Financing Receivable, Past Due [Line Items]
Loans and leases	2,294	2,381
60-89 Days Past Due and Accruing | Consumer portfolio | Other consumer
Financing Receivable, Past Due [Line Items]
Loans and leases	162	162
Current
Financing Receivable, Past Due [Line Items]
Loans and leases	52,405,089	51,930,861
Current | Commercial portfolio
Financing Receivable, Past Due [Line Items]
Loans and leases	41,674,929	41,551,357
Current | Commercial portfolio | Commercial non-mortgage
Financing Receivable, Past Due [Line Items]
Loans and leases	17,988,605	17,782,597
Current | Commercial portfolio | Asset-based
Financing Receivable, Past Due [Line Items]
Loans and leases	1,342,902	1,361,223
Current | Commercial portfolio | Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans and leases	14,268,332	14,349,612
Current | Commercial portfolio | Multi-family
Financing Receivable, Past Due [Line Items]
Loans and leases	6,874,486	6,851,672
Current | Commercial portfolio | Equipment financing
Financing Receivable, Past Due [Line Items]
Loans and leases	1,200,604	1,206,253
Current | Consumer portfolio
Financing Receivable, Past Due [Line Items]
Loans and leases	10,730,160	10,379,504
Current | Consumer portfolio | Residential
Financing Receivable, Past Due [Line Items]
Loans and leases	9,090,547	8,826,720
Current | Consumer portfolio | Home equity
Financing Receivable, Past Due [Line Items]
Loans and leases	1,363,310	1,397,613
Current | Consumer portfolio | Other consumer
Financing Receivable, Past Due [Line Items]
Loans and leases	276,303	155,171
In Process | Commercial portfolio
Financing Receivable, Past Due [Line Items]
Loans and leases	$ 72,100	$ 32,700