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Loans and the Allowance for Credit Losses - Summary of Aging Analysis of Portfolio Loans Restructured (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024	Sep. 30, 2024
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	$ 18,932,074	$ 12,656,429
Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	165,192		$ 51,216
Home Equity [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,091,636	821,110
Home Equity [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,851		1,297
Commercial and Industrial [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	2,771,906	1,787,277
Commercial and Industrial [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	11,891		1,871
Commercial Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	10,755,370	7,326,681
Commercial Real Estate [Member] | Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,826,642	1,352,083
Commercial Real Estate [Member] | Commercial Real Estate - Land and Construction [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	54,725		5
Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	8,928,728	5,974,598
Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	90,090		45,006
Residential Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	3,928,469	2,520,086
Residential Real Estate [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	5,829		2,646
Consumer [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	384,693	201,275
Consumer [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	806		391
30-59 Days Past Due [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	47,493	22,254
30-59 Days Past Due [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	304		342
30-59 Days Past Due [Member] | Home Equity [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	10,490	7,420
30-59 Days Past Due [Member] | Home Equity [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	290		64
30-59 Days Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	22,196	957
30-59 Days Past Due [Member] | Commercial and Industrial [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan			250
30-59 Days Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	8,119	8,478
30-59 Days Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	369	832
30-59 Days Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	7,750	7,646
30-59 Days Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,257	1,483
30-59 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	5,431	3,916
30-59 Days Past Due [Member] | Consumer [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	14		28
60-89 Days Past Due [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	40,865	24,970
60-89 Days Past Due [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	2,072		3,457
60-89 Days Past Due [Member] | Home Equity [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	4,533	3,043
60-89 Days Past Due [Member] | Home Equity [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	225
60-89 Days Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	2,167	8,872
60-89 Days Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	12,900	8,148
60-89 Days Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,413
60-89 Days Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Land and Construction [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	293
60-89 Days Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	11,487	8,148
60-89 Days Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan			3,433
60-89 Days Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	18,916	3,523
60-89 Days Past Due [Member] | Residential Real Estate [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,513
60-89 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	2,349	1,384
60-89 Days Past Due [Member] | Consumer [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	41		24
90 Days or More Past Due [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	86,125	41,893
90 Days or More Past Due [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	15,804		570
90 Days or More Past Due [Member] | Home Equity [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	6,450	4,622
90 Days or More Past Due [Member] | Home Equity [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	425		309
90 Days or More Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	20,062	4,616
90 Days or More Past Due [Member] | Commercial and Industrial [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	7,894		34
90 Days or More Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	30,198	23,641
90 Days or More Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	4,358
90 Days or More Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Land and Construction [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	832
90 Days or More Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	25,840	23,641
90 Days or More Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	5,312
90 Days or More Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	27,196	8,121
90 Days or More Past Due [Member] | Residential Real Estate [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,247		161
90 Days or More Past Due [Member] | Consumer [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	2,219	893
90 Days or More Past Due [Member] | Consumer [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	94		66
Total Past Due [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	174,483	89,117
Total Past Due [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	18,180		4,369
Total Past Due [Member] | Home Equity [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	21,473	15,085
Total Past Due [Member] | Home Equity [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	940		373
Total Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	44,425	14,445
Total Past Due [Member] | Commercial and Industrial [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	7,894		284
Total Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	51,217	40,267
Total Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	6,140	832
Total Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Land and Construction [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,125
Total Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	45,077	39,435
Total Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	5,312		3,433
Total Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	47,369	13,127
Total Past Due [Member] | Residential Real Estate [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	2,760		161
Total Past Due [Member] | Consumer [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	9,999	6,193
Total Past Due [Member] | Consumer [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	149		118
Current [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	18,757,591	12,567,312
Current [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	147,012		46,847
Current [Member] | Home Equity [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,070,163	806,025
Current [Member] | Home Equity [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	911		924
Current [Member] | Commercial and Industrial [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	2,727,481	1,772,832
Current [Member] | Commercial and Industrial [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	3,997		1,587
Current [Member] | Commercial Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	10,704,153	7,286,414
Current [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,820,502	1,351,251
Current [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Land and Construction [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	53,600		5
Current [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	8,883,651	5,935,163
Current [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	84,778		41,573
Current [Member] | Residential Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	3,881,100	2,506,959
Current [Member] | Residential Real Estate [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	3,069		2,485
Current [Member] | Consumer [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	374,694	$ 195,082
Current [Member] | Consumer [Member] | Loan Modification
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	$ 657		$ 273

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