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Fair Value Measurements - Estimated fair value of company's financial instruments (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Federal funds sold | $ 69,809 | $ 20,391
Interest bearing deposits with other banks | 47,131 | 1,680,945
Investment securities available-for-sale | 1,649,753 | 2,623,408
Investment securities, held-to-maturity, estimated fair value | 989,001 | 0
Federal Reserve and Federal Home Loan Bank stock | 42,311 | 34,153
Interest bearing deposits | 964,567 | 777,255
Customer repurchase agreements | 21,465 | 23,918
Fair Value, Inputs, Level 2 | Credit risk participation agreements |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Derivative liability | 3 | 47
Carrying Value |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Cash and due from banks | 27,235 | 12,886
Federal funds sold | 69,809 | 20,391
Interest bearing deposits with other banks | 47,131 | 1,680,945
Investment securities available-for-sale | 1,649,753 | 2,623,408
Investment securities, held-to-maturity, estimated fair value | 1,114,084 |
Federal Reserve and Federal Home Loan Bank stock |  | 34,153
Loans held for sale | 9,387 | 47,218
Loans | 7,228,731 | 7,065,598
Noninterest bearing deposits | 2,928,774 | 3,277,956
Interest bearing deposits | 5,185,335 | 5,974,502
Time deposits | 649,241 | 729,082
Customer repurchase agreements | 21,465 | 23,918
Borrowings | 584,763 | 369,670
Carrying Value | Mortgage banking derivatives |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Derivative asset | 259 | 636
Derivative liability | 115 |
Carrying Value | Credit risk participation agreements |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Derivative liability | 3 | 47
Carrying Value | Interest rate derivatives |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Derivative asset | 30,635 | 5,197
Derivative liability | 29,492 | 5,147
Fair Value |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Cash and due from banks | 27,235 | 12,886
Federal funds sold | 69,809 | 20,391
Interest bearing deposits with other banks | 47,131 | 1,680,945
Investment securities available-for-sale | 1,649,753 | 2,623,408
Investment securities, held-to-maturity, estimated fair value | 989,001 |
Federal Reserve and Federal Home Loan Bank stock |  | 34,153
Loans held for sale | 9,387 | 47,218
Loans | 7,117,321 | 6,930,929
Noninterest bearing deposits | 2,928,774 | 3,277,956
Interest bearing deposits | 5,185,335 | 5,974,502
Time deposits | 639,069 | 736,001
Customer repurchase agreements | 21,465 | 23,918
Borrowings | 583,416 | 374,326
Fair Value | Mortgage banking derivatives |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Derivative asset | 259 | 636
Derivative liability | 115 |
Fair Value | Credit risk participation agreements |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Derivative liability | 3 | 47
Fair Value | Interest rate derivatives |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Derivative asset | 30,635 | 5,197
Derivative liability | 29,492 | 5,147
Fair Value | Fair Value, Inputs, Level 1 |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Cash and due from banks | 27,235 | 12,886
Federal funds sold | 0 | 0
Interest bearing deposits with other banks | 0 | 0
Investment securities available-for-sale | 0 | 0
Investment securities, held-to-maturity, estimated fair value | 0 |
Federal Reserve and Federal Home Loan Bank stock |  | 0
Loans held for sale | 0 | 0
Loans | 0 | 0
Noninterest bearing deposits | 0 | 0
Interest bearing deposits | 0 | 0
Time deposits | 0 | 0
Customer repurchase agreements | 0 | 0
Borrowings | 0 | 0
Fair Value | Fair Value, Inputs, Level 1 | Mortgage banking derivatives |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Derivative asset | 0 | 0
Derivative liability | 0 |
Fair Value | Fair Value, Inputs, Level 1 | Credit risk participation agreements |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Derivative liability | 0 | 0
Fair Value | Fair Value, Inputs, Level 1 | Interest rate derivatives |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Derivative asset | 0 | 0
Derivative liability | 0 | 0
Fair Value | Fair Value, Inputs, Level 2 |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Cash and due from banks | 0 | 0
Federal funds sold | 69,809 | 20,391
Interest bearing deposits with other banks | 47,131 | 1,680,945
Investment securities available-for-sale | 1,649,753 | 2,611,408
Investment securities, held-to-maturity, estimated fair value | 977,001 |
Federal Reserve and Federal Home Loan Bank stock |  | 34,153
Loans held for sale | 9,387 | 47,218
Loans | 0 | 0
Noninterest bearing deposits | 2,928,774 | 3,277,956
Interest bearing deposits | 5,185,335 | 5,974,502
Time deposits | 639,069 | 736,001
Customer repurchase agreements | 21,465 | 23,918
Borrowings | 583,416 | 374,326
Fair Value | Fair Value, Inputs, Level 2 | Mortgage banking derivatives |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Derivative asset | 0 | 0
Derivative liability | 0 |
Fair Value | Fair Value, Inputs, Level 2 | Interest rate derivatives |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Derivative asset | 30,635 | 5,197
Derivative liability | 29,492 | 5,147
Fair Value | Fair Value, Inputs, Level 3 |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Cash and due from banks | 0 | 0
Federal funds sold | 0 | 0
Interest bearing deposits with other banks | 0 | 0
Investment securities available-for-sale | 0 | 12,000
Investment securities, held-to-maturity, estimated fair value | 12,000 |
Federal Reserve and Federal Home Loan Bank stock |  | 0
Loans held for sale | 0 | 0
Loans | 7,117,321 | 6,930,929
Noninterest bearing deposits | 0 | 0
Interest bearing deposits | 0 | 0
Time deposits | 0 | 0
Customer repurchase agreements | 0 | 0
Borrowings | 0 | 0
Fair Value | Fair Value, Inputs, Level 3 | Mortgage banking derivatives |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Derivative asset | 259 | 636
Derivative liability | 115 |
Fair Value | Fair Value, Inputs, Level 3 | Credit risk participation agreements |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Derivative liability | 0 | 0
Fair Value | Fair Value, Inputs, Level 3 | Interest rate derivatives |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Derivative asset | 0 | 0
Derivative liability | $ 0 | $ 0

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- Definition 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. + References No definition available. + Details
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=124260329&loc=d3e26610-111562 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
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- Definition 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. + References No definition available. + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 22 -URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226052-175313 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=123594938&loc=d3e13433-108611 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or 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 liabilities not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=123594938&loc=d3e13433-108611 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 22 -URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226052-175313 + Details
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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.3) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 + Details
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- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27232-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5A -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126970911&loc=SL120269820-111563 + Details
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- Definition The aggregate of all domestic and foreign interest-bearing deposit liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.12) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 + Details
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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section 45 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=126970686&loc=d3e59706-112781 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.2) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 + Details
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- Definition Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables. + References No definition available. + Details
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- Definition Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -URI https://asc.fasb.org/subtopic&trid=2196772 + Details
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- Definition Amount, after the effects of master netting arrangements, of funds outstanding borrowed in the form of a security repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price. Includes liabilities not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(m)(1)(i)) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(m)(1)(ii)(A)(i)) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13(1)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 + Details
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