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Loans and Allowance for Loan Losses - Loans Modified in Troubled Debt Restructurings by Segment (Details) | 12 Months Ended
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Dec. 31, 2020 USD ($) item | Dec. 31, 2019 USD ($)
Troubled Debt Restructurings Total Modifications | $ 3,300,000 | $ 1,900,000
Troubled Debt Restructurings Accruing Interest | $ 2,400,000 | 1,400,000
Troubled Debt Restructurings |  | 562,000
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | item | 0 |
Substandard |  |
Troubled Debt Restructurings | $ 1,600,000 |
Commercial Real Estate |  |
Troubled Debt Restructured Loans and Impaired | 646,000 | 412,000
Consumer Loan |  |
Troubled Debt Restructured Loans and Impaired | 629,000 | 343,000
Construction and land development |  |
Troubled Debt Restructured Loans and Impaired | 20,000 | 251,000
Commercial business |  |
Troubled Debt Restructured Loans and Impaired | 127,000 | 156,000
Single Family Residential Mortgage |  |
Troubled Debt Restructured Loans and Impaired | $ 1,900,000 | $ 768,000

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- Definition Represents the monetary amount of Troubled Debt Restructurings, as of the indicated date. + References No definition available. + Details
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- Definition Number of financing receivable contracts modified as troubled debt restructuring within previous 12 months, with subsequent payment default. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953682-111524 + Details
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