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Fair Market Value of Financial Assets and Liabilities, Estimated Fair Value of Financial Instruments and Indication of Level Within Fair Value Hierarchy of Valuation Techniques (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Financial assets [Abstract] |  |
Debt securities available-for-sale | $ 740,479 | $ 599,844
Debt securities held-to-maturity | 0 | 517
Equity securities at fair value | 2,094 | 1,953
Federal Reserve Bank stock | 4,887 | 4,887
Mortgage servicing rights | 2,518 | 3,263
Carrying Amount [Member] |  |
Financial assets [Abstract] |  |
Cash and cash equivalents | 478,085 | 264,683
Certificates of deposits in other banks | 245 | 245
Debt securities available-for-sale | 740,479 | 599,844
Debt securities held-to-maturity |  | 517
Equity securities at fair value | 2,094 | 1,953
Loans held for sale | 28,987 | 1,167
Loans, net | 3,492,136 | 3,213,568
Federal Home Loan Bank stock | 10,408 | 10,474
Federal Reserve Bank stock | 4,887 | 4,887
Accrued interest receivable | 14,858 | 14,836
Mortgage servicing rights | 2,518 | 3,263
Financial liabilities [Abstract] |  |
Deposits | 3,972,309 | 3,405,572
Repurchase agreements | 296,007 | 226,917
Federal funds purchased | 1,000 | 7,906
Advances from Federal Home Loan Bank | 405 | 415
Long-term debt | 57,841 | 57,841
Accrued interest payable | 4,508 | 2,839
Unrecognized financial instruments [Abstract] |  |
Letters of credit | 0 | 0
Commitments to extend credit | 0 | 0
Forward sale commitments | 0 | 0
Fair Value [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
Financial assets [Abstract] |  |
Cash and cash equivalents | 478,085 | 264,683
Certificates of deposits in other banks | 0 | 0
Debt securities available-for-sale | 3,498 | 54,263
Debt securities held-to-maturity |  | 0
Equity securities at fair value | 0 | 0
Loans held for sale | 29,624 | 1,191
Loans, net | 0 | 0
Federal Home Loan Bank stock | 0 | 0
Federal Reserve Bank stock | 0 | 0
Accrued interest receivable | 0 | 0
Mortgage servicing rights | 0 | 0
Financial liabilities [Abstract] |  |
Deposits | 1,109,873 | 865,760
Repurchase agreements | 0 | 0
Federal funds purchased | 0 | 0
Advances from Federal Home Loan Bank | 0 | 0
Long-term debt | 0 | 0
Accrued interest payable | 0 | 0
Unrecognized financial instruments [Abstract] |  |
Letters of credit | 0 | 0
Commitments to extend credit | 0 | 0
Forward sale commitments | 0 | 0
Fair Value [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |
Financial assets [Abstract] |  |
Cash and cash equivalents | 0 | 0
Certificates of deposits in other banks | 245 | 245
Debt securities available-for-sale | 736,981 | 545,581
Debt securities held-to-maturity |  | 517
Equity securities at fair value | 0 | 0
Loans held for sale | 0 | 0
Loans, net | 0 | 0
Federal Home Loan Bank stock | 10,408 | 10,474
Federal Reserve Bank stock | 4,887 | 4,887
Accrued interest receivable | 14,858 | 14,836
Mortgage servicing rights | 0 | 0
Financial liabilities [Abstract] |  |
Deposits | 2,895,792 | 2,560,271
Repurchase agreements | 0 | 0
Federal funds purchased | 1,000 | 7,906
Advances from Federal Home Loan Bank | 440 | 446
Long-term debt | 0 | 0
Accrued interest payable | 4,508 | 2,839
Unrecognized financial instruments [Abstract] |  |
Letters of credit | 0 | 0
Commitments to extend credit | 0 | 0
Forward sale commitments | 0 | 0
Fair Value [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |
Financial assets [Abstract] |  |
Cash and cash equivalents | 0 | 0
Certificates of deposits in other banks | 0 | 0
Debt securities available-for-sale | 0 | 0
Debt securities held-to-maturity |  | 0
Equity securities at fair value | 2,094 | 1,953
Loans held for sale | 0 | 0
Loans, net | 3,604,615 | 3,283,876
Federal Home Loan Bank stock | 0 | 0
Federal Reserve Bank stock | 0 | 0
Accrued interest receivable | 0 | 0
Mortgage servicing rights | 2,518 | 3,263
Financial liabilities [Abstract] |  |
Deposits | 0 | 0
Repurchase agreements | 295,923 | 226,921
Federal funds purchased | 0 | 0
Advances from Federal Home Loan Bank | 0 | 0
Long-term debt | 49,382 | 49,382
Accrued interest payable | 0 | 0
Unrecognized financial instruments [Abstract] |  |
Letters of credit | 0 | 0
Commitments to extend credit | 0 | 0
Forward sale commitments | $ 0 | $ 0

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- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents the certificates of deposits in other bank asset. + References No definition available. + Details
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- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents commitments to extend credit as of the balance sheet date. + References No definition available. + Details
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- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents forward sale commitments of the balance sheet date. + References No definition available. + Details
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- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents the sum of trade and related party payables and accrued expenses as of the balance sheet date. + 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 http://asc.fasb.org/extlink&oid=120398452&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 http://asc.fasb.org/extlink&oid=121558606&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 http://asc.fasb.org/extlink&oid=121553693&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 http://asc.fasb.org/extlink&oid=121645371&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 portion of deposit liabilities held by the entity, including, but not limited to, foreign and domestic, interest and noninterest bearing, demand deposits, saving deposits, negotiable orders of withdrawal (NOW) and time deposits. + References No definition available. + Details
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- Definition Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=99377092&loc=SL75136599-209740 + Details
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- Definition Fair value portion of short term borrowing where a bank borrows, at the federal funds rate, from another bank and securities that an entity sells and agrees to repurchase at a specified date for a specified price. + References No definition available. + Details
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- Definition Federal Reserve Bank stock represents an equity interest in the Federal Reserve Bank. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 325 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=75031641&loc=d3e63345-112809 + 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 http://asc.fasb.org/extlink&oid=121645371&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 http://asc.fasb.org/extlink&oid=120398452&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 http://asc.fasb.org/extlink&oid=121645371&loc=SL120269820-111563 + Details
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- Definition Fair value portion of investments in Federal Home Loan Bank (FHLBank) stock. + References No definition available. + 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 http://asc.fasb.org/subtopic&trid=2196772 + Details
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