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Loans and Allowance for Credit Losses - Schedule of Types of Collateral (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	$ 33,623,319	$ 32,991,927
Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	248,369	226,996
Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	40,959	25,524
Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	6,868	3,747
Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	16,654	5,243
Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	6,398	6,464
Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	9,648,269	9,512,230
Commercial | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	11,284	14,303
Commercial | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	39,258	24,729
Commercial | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	5,728	2,577
Commercial | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	11,582	280
Commercial | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	319	328
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	14,653,958	14,140,629
Commercial real estate | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	163,753	146,425
Commercial real estate | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	0	0
Commercial real estate | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	1,133	1,167
Commercial real estate | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	0	0
Commercial real estate | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	6,031	6,107
BBCC | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	3,793	3,522
BBCC | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	1,701	794
BBCC | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	0	0
BBCC | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	278	390
BBCC | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	0	0
Residential real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	6,661,379	6,699,443
Residential real estate | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	47,022	41,771
Residential real estate | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	0	0
Residential real estate | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	0	0
Residential real estate | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	0	0
Residential real estate | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	0	0
Indirect
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	1,091,998	1,050,982
Indirect | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	0	0
Indirect | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	0	0
Indirect | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	0	0
Indirect | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	4,408	4,207
Indirect | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	0	0
Direct
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	506,305	523,172
Direct | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	4,559	4,727
Direct | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	0	1
Direct | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	7	3
Direct | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	386	366
Direct | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	48	29
Home equity
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	1,061,410	1,065,471
Home equity | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	17,958	16,248
Home equity | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	0	0
Home equity | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	0	0
Home equity | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	0	0
Home equity | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans, net of unearned income	$ 0	$ 0

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph c
-Publisher SEC

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- Definition

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479344/326-20-45-1

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