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Loans and Allowance for Credit Losses - Average Recorded Investment and Interest Income Recognized on Impaired Loans (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Average recorded investment and interest income recognized [Abstract] |  |
Average Investment in Impaired Loans | $ 34,199 | $ 31,294
Interest Income Recognized | 63 | 71
Real Estate Loan |  |
Average recorded investment and interest income recognized [Abstract] |  |
Average Investment in Impaired Loans | 27,018 | 22,388
Interest Income Recognized | 56 | 69
Construction and Land Development | Real Estate Loan |  |
Average recorded investment and interest income recognized [Abstract] |  |
Average Investment in Impaired Loans | 754 | 600
Interest Income Recognized | 5 | 8
Agricultural | Real Estate Loan |  |
Average recorded investment and interest income recognized [Abstract] |  |
Average Investment in Impaired Loans | 957 | 1,202
Interest Income Recognized | 0 | 0
Residential Properties | Real Estate Loan | 1-4 Family |  |
Average recorded investment and interest income recognized [Abstract] |  |
Average Investment in Impaired Loans | 9,857 | 8,997
Interest Income Recognized | 13 | 18
Residential Properties | Real Estate Loan | Multifamily |  |
Average recorded investment and interest income recognized [Abstract] |  |
Average Investment in Impaired Loans | 2,294 | 3,323
Interest Income Recognized | 0 | 1
Commercial | Real Estate Loan |  |
Average recorded investment and interest income recognized [Abstract] |  |
Average Investment in Impaired Loans | 13,156 | 8,266
Interest Income Recognized | 38 | 42
Agricultural Loans |  |
Average recorded investment and interest income recognized [Abstract] |  |
Average Investment in Impaired Loans | 262 | 960
Interest Income Recognized | 6 | 0
Commercial and Industrial Loans |  |
Average recorded investment and interest income recognized [Abstract] |  |
Average Investment in Impaired Loans | 6,455 | 7,402
Interest Income Recognized | 1 | 2
Consumer Loans |  |
Average recorded investment and interest income recognized [Abstract] |  |
Average Investment in Impaired Loans | 438 | 544
Interest Income Recognized | 0 | 0
All Other Loans |  |
Average recorded investment and interest income recognized [Abstract] |  |
Average Investment in Impaired Loans | 26 | 0
Interest Income Recognized | $ 0 | $ 0

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- Definition Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5212-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5258-111524 + Details
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- Definition Amount of interest income recognized on a cash-basis method of accounting that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5212-111524 + Details
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