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Loans and Allowance for Credit Losses - Schedule of Types of Collateral (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	$ 32,432,473	$ 31,123,641
Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	231,880	168,623
Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	42,500	43,245
Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1,898	4,408
Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	4,780	5,085
Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	6,657	7,414
Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	9,698,241	9,508,904
Commercial | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	14,450	8,962
Commercial | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	37,285	42,754
Commercial | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	652	2,690
Commercial | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	535	1,611
Commercial | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	366	980
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	13,450,209	12,457,070
Commercial real estate | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	156,570	108,871
Commercial real estate | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	3,908	0
Commercial real estate | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1,246	1,718
Commercial real estate | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Commercial real estate | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	6,259	6,411
BBCC | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	2,267	1,939
BBCC | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1,301	478
BBCC | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
BBCC | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	36	12
BBCC | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Residential real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	6,684,480	6,460,441
Residential real estate | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	39,388	34,660
Residential real estate | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Residential real estate | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Residential real estate | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Residential real estate | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Indirect
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1,003,287	1,034,257
Indirect | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Indirect | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Indirect | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Indirect | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	3,956	3,230
Indirect | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Direct
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	565,950	629,186
Direct | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	4,973	2,991
Direct | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	6	13
Direct | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Direct | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	253	232
Direct | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	32	23
Home equity
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1,030,306	1,033,783
Home equity | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	14,232	11,200
Home equity | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Home equity | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Home equity | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Home equity | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	$ 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

Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

+ 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

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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-Name Accounting Standards Codification
-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-3B

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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-Name Accounting Standards Codification
-Section 50
-Paragraph 5
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-5

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