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Fair Values of Financial Instruments - Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Assets: |  |
Cash and due from banks | $ 122,594 | $ 167,146
Investment securities held to maturity | 1,907,865 | 2,202,503
Loans held for sale | 9,094 | 11,187
Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Assets: |  |
Cash and due from banks | 122,594 | 167,146
Interest-bearing deposits | 126,061 | 474,154
Investment securities available for sale | 2,459 | 999
Investment securities held to maturity | 0 | 0
Loans held for sale | 0 | 0
Loans | 0 | 0
Federal Home Loan Bank stock | 0 | 0
Derivative assets | 0 | 0
Interest receivable | 0 | 0
Liabilities at December 31: |  |
Deposits | 13,105,936 | 12,038,992
Borrowings: |  |
Federal funds purchased | 0 |
Securities sold under repurchase agreements | 0 | 0
Federal Home Loan Bank advances | 0 | 0
Subordinated debentures and other borrowings | 0 | 0
Interest rate swap liability | 0 | 0
Interest payable | 0 | 0
Significant Other Observable Inputs (Level 2) |  |
Assets: |  |
Cash and due from banks | 0 | 0
Interest-bearing deposits | 0 | 0
Investment securities available for sale | 1,970,763 | 2,338,061
Investment securities held to maturity | 1,893,271 | 2,188,600
Loans held for sale | 9,094 | 11,187
Loans | 0 | 0
Federal Home Loan Bank stock | 38,525 | 28,736
Derivative assets | 93,036 | 41,133
Interest receivable | 85,070 | 57,187
Liabilities at December 31: |  |
Deposits | 1,251,017 | 690,089
Borrowings: |  |
Federal funds purchased | 171,560 |
Securities sold under repurchase agreements | 167,396 | 181,572
Federal Home Loan Bank advances | 615,211 | 337,005
Subordinated debentures and other borrowings | 122,102 | 107,892
Interest rate swap liability | 92,770 | 41,968
Interest payable | 7,530 | 2,762
Significant Unobservable Inputs (Level 3) |  |
Assets: |  |
Cash and due from banks | 0 | 0
Interest-bearing deposits | 0 | 0
Investment securities available for sale | 3,439 | 5,491
Investment securities held to maturity | 14,594 | 13,903
Loans held for sale | 0 | 0
Loans | 11,156,217 | 9,068,319
Federal Home Loan Bank stock | 0 | 0
Derivative assets | 0 | 0
Interest receivable | 0 | 0
Liabilities at December 31: |  |
Deposits | 0 | 0
Borrowings: |  |
Federal funds purchased | 0 |
Securities sold under repurchase agreements | 0 | 0
Federal Home Loan Bank advances | 0 | 0
Subordinated debentures and other borrowings | 0 | 0
Interest rate swap liability | 0 | 0
Interest payable | 0 | 0
Carrying Amount |  |
Assets: |  |
Cash and due from banks | 122,594 | 167,146
Interest-bearing deposits | 126,061 | 474,154
Investment securities available for sale | 1,976,661 | 2,344,551
Investment securities held to maturity | 2,287,127 | 2,179,802
Loans held for sale | 9,094 | 11,187
Loans | 11,780,617 | 9,046,464
Federal Home Loan Bank stock | 38,525 | 28,736
Derivative assets | 93,036 | 41,133
Interest receivable | 85,070 | 57,187
Liabilities at December 31: |  |
Deposits | 14,382,745 | 12,732,577
Borrowings: |  |
Federal funds purchased | 171,560 |
Securities sold under repurchase agreements | 167,413 | 181,577
Federal Home Loan Bank advances | 823,674 | 334,055
Subordinated debentures and other borrowings | 151,298 | 118,618
Interest rate swap liability | 92,770 | 41,968
Interest payable | $ 7,530 | $ 2,762

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