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Fair Market Value of Financial Assets and Liabilities (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Assets Measured at Fair Value on Recurring Basis [Abstract] |  |
Debt securities available-for-sale | $ 997,261 | $ 599,844
Equity securities at fair value | 2,471 | 1,953
Liabilities Measured at Fair Value on Recurring Basis [Abstract] |  |
Liabilities | 0 | 0
Assets measured-nonrecurring basis [Abstract] |  |
Collateral dependent loans | 1,768 |
Impaired loans |  | 3,217
Reconciliation of beginning and ending balances of recurring fair value measurements recognized in balance sheet using significant unobservable (Level 3) inputs [Roll Forward] |  |
Total losses | $ (546) | (195)
Minimum [Member] |  |
Other real estate owned [Abstract] |  |
Typical frequency of periodic reviews | 12 months |
Maximum [Member] |  |
Other real estate owned [Abstract] |  |
Typical frequency of periodic reviews | 18 months |
Frequency of periodic reviews in general | 24 months |
U.S. Treasury and Government Agencies [Member] |  |
Assets Measured at Fair Value on Recurring Basis [Abstract] |  |
Debt securities available-for-sale | $ 148,793 | 171,150
State and Political Subdivisions [Member] |  |
Assets Measured at Fair Value on Recurring Basis [Abstract] |  |
Debt securities available-for-sale | 140,416 | 102,307
U.S. Government Sponsored Agency Mortgage-backed Securities [Member] |  |
Assets Measured at Fair Value on Recurring Basis [Abstract] |  |
Debt securities available-for-sale | 651,807 | 295,245
Other Debt Securities [Member] |  |
Assets Measured at Fair Value on Recurring Basis [Abstract] |  |
Debt securities available-for-sale | 56,245 | 31,142
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value [Member] |  |
Assets Measured at Fair Value on Recurring Basis [Abstract] |  |
Debt securities available-for-sale | 74,991 | 54,263
Equity securities at fair value | 0 | 0
Significant Other Observable Inputs (Level 2) [Member] | Fair Value [Member] |  |
Assets Measured at Fair Value on Recurring Basis [Abstract] |  |
Debt securities available-for-sale | 922,270 | 545,581
Equity securities at fair value | 0 | 0
Significant Unobservable Inputs (Level 3) [Member] | Fair Value [Member] |  |
Assets Measured at Fair Value on Recurring Basis [Abstract] |  |
Debt securities available-for-sale | 0 | 0
Equity securities at fair value | 2,471 | 1,953
Recurring [Member] |  |
Assets Measured at Fair Value on Recurring Basis [Abstract] |  |
Equity securities at fair value | 2,471 | 1,953
Mortgage servicing rights | 4,068 | 3,263
Recurring [Member] | U.S. Treasury and Government Agencies [Member] |  |
Assets Measured at Fair Value on Recurring Basis [Abstract] |  |
Debt securities available-for-sale | 148,793 | 171,150
Recurring [Member] | State and Political Subdivisions [Member] |  |
Assets Measured at Fair Value on Recurring Basis [Abstract] |  |
Debt securities available-for-sale | 140,416 | 102,307
Recurring [Member] | U.S. Government Sponsored Agency Mortgage-backed Securities [Member] |  |
Assets Measured at Fair Value on Recurring Basis [Abstract] |  |
Debt securities available-for-sale | 651,807 | 295,245
Recurring [Member] | Other Debt Securities [Member] |  |
Assets Measured at Fair Value on Recurring Basis [Abstract] |  |
Debt securities available-for-sale | 56,245 | 31,142
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
Assets Measured at Fair Value on Recurring Basis [Abstract] |  |
Equity securities at fair value | 0 | 0
Mortgage servicing rights | 0 | 0
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | U.S. Treasury and Government Agencies [Member] |  |
Assets Measured at Fair Value on Recurring Basis [Abstract] |  |
Debt securities available-for-sale | 74,991 | 54,263
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | State and Political Subdivisions [Member] |  |
Assets Measured at Fair Value on Recurring Basis [Abstract] |  |
Debt securities available-for-sale | 0 | 0
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | U.S. Government Sponsored Agency Mortgage-backed Securities [Member] |  |
Assets Measured at Fair Value on Recurring Basis [Abstract] |  |
Debt securities available-for-sale | 0 | 0
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Other Debt Securities [Member] |  |
Assets Measured at Fair Value on Recurring Basis [Abstract] |  |
Debt securities available-for-sale | 0 | 0
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |
Assets Measured at Fair Value on Recurring Basis [Abstract] |  |
Equity securities at fair value | 0 | 0
Mortgage servicing rights | 0 | 0
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | U.S. Treasury and Government Agencies [Member] |  |
Assets Measured at Fair Value on Recurring Basis [Abstract] |  |
Debt securities available-for-sale | 73,802 | 116,887
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | State and Political Subdivisions [Member] |  |
Assets Measured at Fair Value on Recurring Basis [Abstract] |  |
Debt securities available-for-sale | 140,416 | 102,307
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | U.S. Government Sponsored Agency Mortgage-backed Securities [Member] |  |
Assets Measured at Fair Value on Recurring Basis [Abstract] |  |
Debt securities available-for-sale | 651,807 | 295,245
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Other Debt Securities [Member] |  |
Assets Measured at Fair Value on Recurring Basis [Abstract] |  |
Debt securities available-for-sale | 56,245 | 31,142
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |
Assets Measured at Fair Value on Recurring Basis [Abstract] |  |
Equity securities at fair value | 2,471 | 1,953
Mortgage servicing rights | 4,068 | 3,263
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | U.S. Treasury and Government Agencies [Member] |  |
Assets Measured at Fair Value on Recurring Basis [Abstract] |  |
Debt securities available-for-sale | 0 | 0
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | State and Political Subdivisions [Member] |  |
Assets Measured at Fair Value on Recurring Basis [Abstract] |  |
Debt securities available-for-sale | 0 | 0
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | U.S. Government Sponsored Agency Mortgage-backed Securities [Member] |  |
Assets Measured at Fair Value on Recurring Basis [Abstract] |  |
Debt securities available-for-sale | 0 | 0
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Other Debt Securities [Member] |  |
Assets Measured at Fair Value on Recurring Basis [Abstract] |  |
Debt securities available-for-sale | 0 | 0
Recurring [Member] | Equity Securities at Fair Value [Member] |  |
Reconciliation of beginning and ending balances of recurring fair value measurements recognized in balance sheet using significant unobservable (Level 3) inputs [Roll Forward] |  |
Beginning balance | 1,953 | 1,173
Total unrealized gains (losses) included in net income | 518 | 780
Issues | 0 | 0
Settlements | 0 | 0
Ending balance | 2,471 | 1,953
Total gains (losses) for the period included in net income attributable to the change in unrealized gains or losses related to assets still held at the reporting date | 518 | 780
Recurring [Member] | Mortgage Servicing Rights [Member] |  |
Reconciliation of beginning and ending balances of recurring fair value measurements recognized in balance sheet using significant unobservable (Level 3) inputs [Roll Forward] |  |
Beginning balance | 3,263 | 3,607
Total unrealized gains (losses) included in net income | (163) | (515)
Issues | 1,869 | 631
Settlements | (901) | (460)
Ending balance | 4,068 | 3,263
Total gains (losses) for the period included in net income attributable to the change in unrealized gains or losses related to assets still held at the reporting date | (163) | (515)
Nonrecurring [Member] |  |
Collateral dependent loans [Abstract] |  |
Fair value adjustments on collateral dependent loans | 500 | 700
Other real estate owned [Abstract] |  |
Other real estate owned, fair value adjustment | 700 | 3,200
Nonrecurring [Member] | Fair Value [Member] |  |
Assets measured-nonrecurring basis [Abstract] |  |
Collateral dependent loans | 1,768 |
Impaired loans |  | 3,217
Other real estate owned | 2,395 | 12,593
Nonrecurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value [Member] |  |
Assets measured-nonrecurring basis [Abstract] |  |
Collateral dependent loans | 0 |
Impaired loans |  | 0
Other real estate owned | 0 | 0
Nonrecurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Fair Value [Member] |  |
Assets measured-nonrecurring basis [Abstract] |  |
Collateral dependent loans | 0 |
Impaired loans |  | 0
Other real estate owned | 0 | 0
Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Fair Value [Member] |  |
Assets measured-nonrecurring basis [Abstract] |  |
Collateral dependent loans | 1,768 |
Impaired loans |  | 3,217
Other real estate owned | $ 2,395 | $ 12,593

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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 mortgage servicing right at fair value. + 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 other real estate owned at fair value. + References No definition available. + Details
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