Loans and the Allowance for Credit Losses - Summary of Aging Analysis of Portfolio Loans Restructured (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	$ 11,873,167	$ 11,638,461
ASU 2022-02 Financial Instruments - Credit Losses (Topic 326)
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	40,812
Home Equity [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	740,973	734,219
Home Equity [Member] | ASU 2022-02 Financial Instruments - Credit Losses (Topic 326)
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,263
Commercial and Industrial [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,683,172	1,670,659
Commercial and Industrial [Member] | ASU 2022-02 Financial Instruments - Credit Losses (Topic 326)
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	8,572
Commercial Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	6,754,933	6,565,448
Commercial Real Estate [Member] | Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,087,649	1,055,865
Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	5,667,284	5,509,583
Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member] | ASU 2022-02 Financial Instruments - Credit Losses (Topic 326)
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	29,041
Residential Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	2,469,357	2,438,574
Residential Real Estate [Member] | ASU 2022-02 Financial Instruments - Credit Losses (Topic 326)
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,475
Consumer [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	224,732	229,561
Consumer [Member] | ASU 2022-02 Financial Instruments - Credit Losses (Topic 326)
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	461
30-59 Days Past Due [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	15,226	15,152
30-59 Days Past Due [Member] | ASU 2022-02 Financial Instruments - Credit Losses (Topic 326)
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	90
30-59 Days Past Due [Member] | Home Equity [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	4,869	4,691
30-59 Days Past Due [Member] | Home Equity [Member] | ASU 2022-02 Financial Instruments - Credit Losses (Topic 326)
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	14
30-59 Days Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,440	640
30-59 Days Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	2,852	4,416
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	2,852	4,416
30-59 Days Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	3,160	1,572
30-59 Days Past Due [Member] | Residential Real Estate [Member] | ASU 2022-02 Financial Instruments - Credit Losses (Topic 326)
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	37
30-59 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	2,905	3,833
30-59 Days Past Due [Member] | Consumer [Member] | ASU 2022-02 Financial Instruments - Credit Losses (Topic 326)
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	39
60-89 Days Past Due [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	5,605	9,729
60-89 Days Past Due [Member] | ASU 2022-02 Financial Instruments - Credit Losses (Topic 326)
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	101
60-89 Days Past Due [Member] | Home Equity [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	2,249	1,198
60-89 Days Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	633	1,255
60-89 Days Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,226	3,627
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	1,226	3,627
60-89 Days Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	478	2,471
60-89 Days Past Due [Member] | Residential Real Estate [Member] | ASU 2022-02 Financial Instruments - Credit Losses (Topic 326)
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	68
60-89 Days Past Due [Member] | Consumer [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,019	1,178
60-89 Days Past Due [Member] | Consumer [Member] | ASU 2022-02 Financial Instruments - Credit Losses (Topic 326)
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	33
90 Days or More Past Due [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	24,957	25,302
90 Days or More Past Due [Member] | ASU 2022-02 Financial Instruments - Credit Losses (Topic 326)
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	453
90 Days or More Past Due [Member] | Home Equity [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	3,334	4,037
90 Days or More Past Due [Member] | Home Equity [Member] | ASU 2022-02 Financial Instruments - Credit Losses (Topic 326)
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	233
90 Days or More Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,942	4,779
90 Days or More Past Due [Member] | Commercial and Industrial [Member] | ASU 2022-02 Financial Instruments - Credit Losses (Topic 326)
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	41
90 Days or More Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	11,859	10,594
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	11,859	10,594
90 Days or More Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	7,316	5,331
90 Days or More Past Due [Member] | Residential Real Estate [Member] | ASU 2022-02 Financial Instruments - Credit Losses (Topic 326)
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	170
90 Days or More Past Due [Member] | Consumer [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	506	561
90 Days or More Past Due [Member] | Consumer [Member] | ASU 2022-02 Financial Instruments - Credit Losses (Topic 326)
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	9
Total Past Due [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	45,788	50,183
Total Past Due [Member] | ASU 2022-02 Financial Instruments - Credit Losses (Topic 326)
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	644
Total Past Due [Member] | Home Equity [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	10,452	9,926
Total Past Due [Member] | Home Equity [Member] | ASU 2022-02 Financial Instruments - Credit Losses (Topic 326)
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	247
Total Past Due [Member] | Commercial and Industrial [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	4,015	6,674
Total Past Due [Member] | Commercial and Industrial [Member] | ASU 2022-02 Financial Instruments - Credit Losses (Topic 326)
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	41
Total Past Due [Member] | Commercial Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	15,937	18,637
Total Past Due [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	15,937	18,637
Total Past Due [Member] | Residential Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	10,954	9,374
Total Past Due [Member] | Residential Real Estate [Member] | ASU 2022-02 Financial Instruments - Credit Losses (Topic 326)
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	275
Total Past Due [Member] | Consumer [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	4,430	5,572
Total Past Due [Member] | Consumer [Member] | ASU 2022-02 Financial Instruments - Credit Losses (Topic 326)
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	81
Current [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	11,827,379	11,588,278
Current [Member] | ASU 2022-02 Financial Instruments - Credit Losses (Topic 326)
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	40,168
Current [Member] | Home Equity [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	730,521	724,293
Current [Member] | Home Equity [Member] | ASU 2022-02 Financial Instruments - Credit Losses (Topic 326)
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,016
Current [Member] | Commercial and Industrial [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,679,157	1,663,985
Current [Member] | Commercial and Industrial [Member] | ASU 2022-02 Financial Instruments - Credit Losses (Topic 326)
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	8,531
Current [Member] | Commercial Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	6,738,996	6,546,811
Current [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,087,649	1,055,865
Current [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	5,651,347	5,490,946
Current [Member] | Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member] | ASU 2022-02 Financial Instruments - Credit Losses (Topic 326)
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	29,041
Current [Member] | Residential Real Estate [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	2,458,403	2,429,200
Current [Member] | Residential Real Estate [Member] | ASU 2022-02 Financial Instruments - Credit Losses (Topic 326)
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	1,200
Current [Member] | Consumer [Member]
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	220,302	$ 223,989
Current [Member] | Consumer [Member] | ASU 2022-02 Financial Instruments - Credit Losses (Topic 326)
Financing Receivable, Modified, Past Due [Line Items]
Total modified loan	$ 380