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Loans and Allowance for Credit Losses - Schedule of Types of Collateral (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | $ 13,601,846 | $ 13,786,479
Real Estate |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 70,984 | 101,194
Blanket Lien |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 15,147 | 21,654
Investment Securities/Cash |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 4,399 | 6,581
Auto |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 2,906 | 3,292
Other |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 6,975 | 14,607
Commercial |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 3,391,769 | 3,956,422
Commercial | Real Estate |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 8,100 | 8,976
Commercial | Blanket Lien |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 13,816 | 19,253
Commercial | Investment Securities/Cash |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 3,394 | 5,379
Commercial | Auto |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 80 | 394
Commercial | Other |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 302 | 893
Commercial real estate |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 6,380,674 | 5,946,512
Commercial real estate | Real Estate |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 38,657 | 60,844
Commercial real estate | Blanket Lien |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 0 | 472
Commercial real estate | Investment Securities/Cash |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 961 | 1,137
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 | 6,653 | 13,685
BBCC | Real Estate |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 1,895 | 1,425
BBCC | Blanket Lien |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 1,331 | 1,929
BBCC | Investment Securities/Cash |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 43 | 63
BBCC | Auto |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 93 | 134
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 | 2,255,289 | 2,248,422
Residential real estate | Real Estate |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 18,360 | 24,794
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 | 873,139 | 913,902
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 | 2,581 | 2,529
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 | 140,385 | 164,807
Direct | Real Estate |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 724 | 901
Direct | Blanket Lien |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 0 | 0
Direct | Investment Securities/Cash |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 1 | 2
Direct | Auto |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 152 | 235
Direct | Other |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 20 | 29
Home equity |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 560,590 | 556,414
Home equity | Real Estate |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 3,248 | 4,254
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

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