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Fair Value Measurements - Schedule of Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Carrying Value
Assets
Cash and due from banks	$ 9,940	$ 12,655
Federal funds sold	3,746	33,927
Interest bearing deposits with other banks	159,078	265,272
Estimated Fair Value	1,582,185	1,598,666
Investment securities, held-to-maturity, estimated fair value	1,075,303	1,093,374
Federal Reserve and Federal Home Loan Bank stock		65,067
Loans held for sale	6,488	6,734
Loans	7,737,676	7,635,632
Bank owned life insurance	111,217		$ 110,998
Annuity investment	13,675	13,869
Liabilities
Noninterest bearing deposits	2,247,706	3,150,751
Interest bearing deposits	3,877,730	4,778,932
Time deposits	1,337,805	783,499
Customer repurchase agreements	37,854	35,100
Borrowings	2,183,626	1,044,795
Federal Reserve and Federal Home Loan Bank stock	79,134
Carrying Value | Mortgage banking derivatives
Assets
Derivative asset	29	93
Carrying Value | Credit risk participation agreements
Liabilities
Derivative liability	3	2
Carrying Value | Interest rate derivatives
Assets
Derivative asset	25,844	31,039
Liabilities
Derivative liability	25,218	30,065
Fair Value
Assets
Cash and due from banks	9,940	12,655
Federal funds sold	3,746	33,927
Interest bearing deposits with other banks	159,078	265,272
Estimated Fair Value	1,582,185	1,598,666
Investment securities, held-to-maturity, estimated fair value	965,786	967,940
Loans held for sale	6,488	6,734
Loans	7,567,583	7,492,283
Bank owned life insurance	111,217		110,998
Annuity investment	13,675	13,869
Liabilities
Noninterest bearing deposits	2,247,706	3,150,751
Interest bearing deposits	3,877,730	4,778,932
Time deposits	1,324,234	777,757
Customer repurchase agreements	37,854	35,100
Borrowings	2,181,709	1,043,083
Fair Value | Mortgage banking derivatives
Assets
Derivative asset	29	93
Fair Value | Credit risk participation agreements
Liabilities
Derivative liability	3	2
Fair Value | Interest rate derivatives
Assets
Derivative asset	25,844	31,039
Liabilities
Derivative liability	25,218	30,065
Fair Value | Fair Value, Inputs, Level 1
Assets
Cash and due from banks	9,940	12,655
Federal funds sold	0	0
Interest bearing deposits with other banks	0	0
Estimated Fair Value	0	0
Investment securities, held-to-maturity, estimated fair value	0	0
Federal Reserve and Federal Home Loan Bank stock		0
Loans held for sale	0	0
Loans	0	0
Bank owned life insurance	0		0
Annuity investment	0	0
Liabilities
Noninterest bearing deposits	0	0
Interest bearing deposits	0	0
Time deposits	0	0
Customer repurchase agreements	0	0
Borrowings	0	0
Federal Reserve and Federal Home Loan Bank stock	0
Fair Value | Fair Value, Inputs, Level 1 | Mortgage banking derivatives
Assets
Derivative asset	0	0
Fair Value | Fair Value, Inputs, Level 1 | Credit risk participation agreements
Liabilities
Derivative liability	0	0
Fair Value | Fair Value, Inputs, Level 1 | Interest rate derivatives
Assets
Derivative asset	0	0
Liabilities
Derivative liability	0	0
Fair Value | Fair Value, Inputs, Level 2
Assets
Cash and due from banks	0	0
Federal funds sold	3,746	33,927
Interest bearing deposits with other banks	159,078	265,272
Estimated Fair Value	1,582,185	1,598,666
Investment securities, held-to-maturity, estimated fair value	965,786	967,940
Federal Reserve and Federal Home Loan Bank stock		0
Loans held for sale	6,488	6,734
Loans	0	0
Bank owned life insurance	111,217		110,998
Annuity investment	13,675	13,869
Liabilities
Noninterest bearing deposits	2,247,706	3,150,751
Interest bearing deposits	3,877,730	4,778,932
Time deposits	1,324,234	777,757
Customer repurchase agreements	37,854	35,100
Borrowings	2,181,709	1,043,083
Federal Reserve and Federal Home Loan Bank stock	0
Fair Value | Fair Value, Inputs, Level 2 | Mortgage banking derivatives
Assets
Derivative asset	0	0
Fair Value | Fair Value, Inputs, Level 2 | Interest rate derivatives
Assets
Derivative asset	25,844	31,039
Liabilities
Derivative liability	25,218	30,065
Fair Value | Fair Value, Inputs, Level 3
Assets
Cash and due from banks	0	0
Federal funds sold	0	0
Interest bearing deposits with other banks	0	0
Estimated Fair Value	0	0
Investment securities, held-to-maturity, estimated fair value	0	0
Federal Reserve and Federal Home Loan Bank stock		0
Loans held for sale	0	0
Loans	7,567,583	7,492,283
Bank owned life insurance	0		$ 0
Annuity investment	0	0
Liabilities
Noninterest bearing deposits	0	0
Interest bearing deposits	0	0
Time deposits	0	0
Customer repurchase agreements	0	0
Borrowings	0	0
Federal Reserve and Federal Home Loan Bank stock	0
Fair Value | Fair Value, Inputs, Level 3 | Mortgage banking derivatives
Assets
Derivative asset	29	93
Fair Value | Fair Value, Inputs, Level 3 | Credit risk participation agreements
Liabilities
Derivative liability	0	0
Fair Value | Fair Value, Inputs, Level 3 | Interest rate derivatives
Assets
Derivative asset	0	0
Liabilities
Derivative liability	0	0
Federal funds sold	3,746	33,927
Interest bearing deposits with other banks	159,078	265,272
Estimated Fair Value		1,598,666
Investment securities, held-to-maturity, estimated fair value	965,786	968,707
Bank owned life insurance	111,217	110,998
Interest bearing deposits	907,637	1,138,235
Customer repurchase agreements	37,854	35,100
Federal Reserve and Federal Home Loan Bank stock	79,134	65,067
Fair Value, Inputs, Level 2 | Credit risk participation agreements
Liabilities
Derivative liability	$ 3	$ 2

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The aggregate fair value of all domestic and foreign noninterest-bearing deposits liabilities held by the entity.

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Fair value amount of deposits that cannot be withdrawn before a set date without penalty or for which notice of withdrawal is required. Time deposits include, but are not limited to, certificates of deposits, individual retirement accounts and open accounts.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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The carrying amount of a life insurance policy on an officer, executive or employee for which the reporting entity (a bank) is entitled to proceeds from the policy upon death of the insured or surrender of the insurance policy.

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Fair value portion of the amount that could be realized under a life insurance contract or contracts owned by the entity, commonly known as corporate-owned life insurance (COLI) or bank-owned life insurance (BOLI).

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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The amount outstanding of funds lent to other depository institutions, securities brokers, or securities dealers in the form of Federal Funds sold; for example, immediately available funds lent under agreements or contracts that mature in one business day or roll over under a continuing contract, regardless of the nature of the transaction or the collateral involved, excluding overnight lending for commercial and industrial purposes. Also include Federal Funds sold under agreements to resell on a gross basis, excluding (1) sales of term Federal Funds, (2) due bills representing purchases of securities or other assets by the reporting bank that have not yet been delivered and similar instruments, (3) resale agreements that mature in more than one business day involving assets other than securities, and (4) yield maintenance dollar repurchase agreements.

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Amount of Federal Home Loan Bank (FHLB) and Federal Reserve Bank stock.

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Fair value of investment in debt security measured at amortized cost (held-to-maturity).

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For banks and other depository institutions (including Federal Reserve Banks, if applicable): Interest-bearing deposits in other financial institutions for relatively short periods of time including, for example, certificates of deposits, which are presented separately from cash on the balance sheet.

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Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables.

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Fair value portion of other liabilities.

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The aggregate value of all restricted investments.

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