Loans and the Allowance for Credit Losses - Summary of Aging Analysis of Portfolio Loans Restructured (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	$ 11,315,873	$ 10,702,728
ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	18,457
Home Equity [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	715,186	695,065
Home Equity [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	944
Commercial and Industrial [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,587,611	1,579,395
Commercial and Industrial [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	9,319
Commercial Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	6,387,183	6,061,344
Commercial Real Estate [Member] | Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	870,066	943,887
Commercial Real Estate [Member] | Commercial Real Estate - Land and Construction [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	173
Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	5,517,117	5,117,457
Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	7,290
Residential Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	2,392,531	2,140,584
Residential Real Estate [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	226
Consumer [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	233,362	226,340
Consumer [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	505
30-59 Days Past Due [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	10,612	11,222
30-59 Days Past Due [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	119
30-59 Days Past Due [Member] | Home Equity [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	3,599	3,885
30-59 Days Past Due [Member] | Home Equity [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	46
30-59 Days Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	566	1,427
30-59 Days Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	2,161	2,147
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	2,161	2,147
30-59 Days Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,134	853
30-59 Days Past Due [Member] | Residential Real Estate [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	67
30-59 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	3,152	2,910
30-59 Days Past Due [Member] | Consumer [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	6
60-89 Days Past Due [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	6,916	6,621
60-89 Days Past Due [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	168
60-89 Days Past Due [Member] | Home Equity [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,209	621
60-89 Days Past Due [Member] | Home Equity [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	24
60-89 Days Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	438	519
60-89 Days Past Due [Member] | Commercial and Industrial [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	43
60-89 Days Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,279	1,241
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		910
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	1,279	331
60-89 Days Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	33
60-89 Days Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	2,955	3,536
60-89 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,035	704
60-89 Days Past Due [Member] | Consumer [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	68
90 Days or More Past Due [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	26,728	30,986
90 Days or More Past Due [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	439
90 Days or More Past Due [Member] | Home Equity [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	4,943	3,797
90 Days or More Past Due [Member] | Home Equity [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	101
90 Days or More Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,785	3,138
90 Days or More Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	14,608	16,378
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		741
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	14,608	15,637
90 Days or More Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	276
90 Days or More Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	4,608	7,100
90 Days or More Past Due [Member] | Consumer [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	784	573
90 Days or More Past Due [Member] | Consumer [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	62
Total Past Due [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	44,256	48,829
Total Past Due [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	726
Total Past Due [Member] | Home Equity [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	9,751	8,303
Total Past Due [Member] | Home Equity [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	171
Total Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	2,789	5,084
Total Past Due [Member] | Commercial and Industrial [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	43
Total Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	18,048	19,766
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		1,651
Total Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	18,048	18,115
Total Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	309
Total Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	8,697	11,489
Total Past Due [Member] | Residential Real Estate [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	67
Total Past Due [Member] | Consumer [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	4,971	4,187
Total Past Due [Member] | Consumer [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	136
Current [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	11,271,617	10,653,899
Current [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	17,731
Current [Member] | Home Equity [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	705,435	686,762
Current [Member] | Home Equity [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	773
Current [Member] | Commercial and Industrial [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,584,822	1,574,311
Current [Member] | Commercial and Industrial [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	9,276
Current [Member] | Commercial Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	6,369,135	6,041,578
Current [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	870,066	942,236
Current [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Land and Construction [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	173
Current [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	5,499,069	5,099,342
Current [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	6,981
Current [Member] | Residential Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	2,383,834	2,129,095
Current [Member] | Residential Real Estate [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	159
Current [Member] | Consumer [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	228,391	$ 222,153
Current [Member] | Consumer [Member] | ASU 2022-02 [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	$ 369