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Loans and Allowance for Loan Losses, Impaired Financing Receivable (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment |  | $ 58,144,000 | $ 83,146,000
Unpaid principal balance |  | 64,556,000 | 83,337,000
Related allowance |  | 3,280,000 | 3,964,000
Average balance of impaired loans |  | 76,919,000 | 75,257,000
Impaired Financing Receivable, Interest Income, Cash Basis Method | $ 0 | 176,000 | 469,000
Individually Evaluated for Impairment | 74,292,000 | 58,144,000 |
Real Estate |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Individually Evaluated for Impairment | 51,812,000 |  |
Business Assets |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Individually Evaluated for Impairment | 22,437,000 |  |
Other |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Individually Evaluated for Impairment | 43,000 |  |
Commercial Real Estate |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Individually Evaluated for Impairment |  | 18,122,000 |
Commercial Real Estate Owner Occupied |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Individually Evaluated for Impairment | 15,681,000 |  |
Commercial Real Estate Owner Occupied | Real Estate |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Individually Evaluated for Impairment | 15,681,000 |  |
Commercial Real Estate Owner Occupied | Business Assets |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Individually Evaluated for Impairment | 0 |  |
Commercial Real Estate Owner Occupied | Other |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Individually Evaluated for Impairment | 0 |  |
Commercial real estate non owner occupied |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Individually Evaluated for Impairment | 7,000,000 |  |
Commercial real estate non owner occupied | Real Estate |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Individually Evaluated for Impairment | 7,000,000 |  |
Commercial real estate non owner occupied | Business Assets |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Individually Evaluated for Impairment | 0 |  |
Commercial real estate non owner occupied | Other |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Individually Evaluated for Impairment | 0 |  |
Consumer Real Estate |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Individually Evaluated for Impairment | 27,082,000 | 25,018,000 |
Consumer Real Estate | Real Estate |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Individually Evaluated for Impairment | 27,082,000 |  |
Consumer Real Estate | Business Assets |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Individually Evaluated for Impairment | 0 |  |
Consumer Real Estate | Other |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Individually Evaluated for Impairment | 0 |  |
Construction and Land Development |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Individually Evaluated for Impairment | 2,049,000 | 561,000 |
Construction and Land Development | Real Estate |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Individually Evaluated for Impairment | 2,049,000 |  |
Construction and Land Development | Business Assets |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Individually Evaluated for Impairment | 0 |  |
Construction and Land Development | Other |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Individually Evaluated for Impairment | 0 |  |
Commercial and Industrial |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Individually Evaluated for Impairment | 22,476,000 | 14,295,000 |
Commercial and Industrial | Real Estate |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Individually Evaluated for Impairment | 0 |  |
Commercial and Industrial | Business Assets |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Individually Evaluated for Impairment | 22,437,000 |  |
Commercial and Industrial | Other |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Individually Evaluated for Impairment | 39,000 |  |
Consumer and Other |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Individually Evaluated for Impairment | 4,000 | 148,000 |
Consumer and Other | Real Estate |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Individually Evaluated for Impairment | 0 |  |
Consumer and Other | Business Assets |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Individually Evaluated for Impairment | 0 |  |
Consumer and Other | Other |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Individually Evaluated for Impairment | $ 4,000 |  |
Impaired loans with an allowance |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment |  | 35,758,000 | 44,794,000
Unpaid principal balance |  | 40,305,000 | 44,914,000
Related allowance |  | 3,280,000 | 3,964,000
Average balance of impaired loans |  | 44,458,000 | 34,615,000
Impaired Financing Receivable, Interest Income, Cash Basis Method |  | 0 | 0
Impaired loans with an allowance | Commercial Real Estate |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment |  | 9,998,000 | 14,114,000
Unpaid principal balance |  | 10,983,000 | 14,124,000
Related allowance |  | 1,235,000 | 724,000
Average balance of impaired loans |  | 13,750,000 | 10,260,000
Impaired Financing Receivable, Interest Income, Cash Basis Method |  | 0 | 0
Impaired loans with an allowance | Consumer Real Estate |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment |  | 20,996,000 | 19,864,000
Unpaid principal balance |  | 23,105,000 | 19,991,000
Related allowance |  | 1,292,000 | 1,443,000
Average balance of impaired loans |  | 20,909,000 | 13,154,000
Impaired Financing Receivable, Interest Income, Cash Basis Method |  | 0 | 0
Impaired loans with an allowance | Construction and Land Development |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment |  | 542,000 | 581,000
Unpaid principal balance |  | 654,000 | 579,000
Related allowance |  | 33,000 | 28,000
Average balance of impaired loans |  | 578,000 | 1,157,000
Impaired Financing Receivable, Interest Income, Cash Basis Method |  | 0 | 0
Impaired loans with an allowance | Commercial and Industrial |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment |  | 4,074,000 | 9,252,000
Unpaid principal balance |  | 5,381,000 | 9,215,000
Related allowance |  | 711,000 | 1,441,000
Average balance of impaired loans |  | 8,871,000 | 9,326,000
Impaired Financing Receivable, Interest Income, Cash Basis Method |  | 0 | 0
Impaired loans with an allowance | Consumer and Other |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment |  | 148,000 | 983,000
Unpaid principal balance |  | 182,000 | 1,005,000
Related allowance |  | 9,000 | 328,000
Average balance of impaired loans |  | 350,000 | 718,000
Impaired Financing Receivable, Interest Income, Cash Basis Method |  | 0 | 0
Impaired loans without an allowance |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment |  | 22,386,000 | 38,352,000
Unpaid principal balance |  | 24,251,000 | 38,423,000
Related allowance |  | 0 | 0
Average balance of impaired loans |  | 32,461,000 | 40,642,000
Impaired Financing Receivable, Interest Income, Cash Basis Method |  | 176,000 | 469,000
Impaired loans without an allowance | Commercial Real Estate |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment |  | 8,124,000 | 14,724,000
Unpaid principal balance |  | 8,891,000 | 14,739,000
Related allowance |  | 0 | 0
Average balance of impaired loans |  | 11,642,000 | 17,906,000
Impaired Financing Receivable, Interest Income, Cash Basis Method |  | 176,000 | 469,000
Impaired loans without an allowance | Consumer Real Estate |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment |  | 4,022,000 | 7,247,000
Unpaid principal balance |  | 4,021,000 | 7,271,000
Related allowance |  | 0 | 0
Average balance of impaired loans |  | 7,509,000 | 5,477,000
Impaired Financing Receivable, Interest Income, Cash Basis Method |  | 0 | 0
Impaired loans without an allowance | Construction and Land Development |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment |  | 19,000 | 1,786,000
Unpaid principal balance |  | 17,000 | 1,786,000
Related allowance |  | 0 | 0
Average balance of impaired loans |  | 365,000 | 1,463,000
Impaired Financing Receivable, Interest Income, Cash Basis Method |  | 0 | 0
Impaired loans without an allowance | Commercial and Industrial |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment |  | 10,221,000 | 14,595,000
Unpaid principal balance |  | 11,322,000 | 14,627,000
Related allowance |  | 0 | 0
Average balance of impaired loans |  | 12,945,000 | 15,796,000
Impaired Financing Receivable, Interest Income, Cash Basis Method |  | 0 | 0
Impaired loans without an allowance | Consumer and Other |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment |  | 0 | 0
Unpaid principal balance |  | 0 | 0
Related allowance |  | 0 | 0
Average balance of impaired loans |  | 0 | 0
Impaired Financing Receivable, Interest Income, Cash Basis Method |  | $ 0 | $ 0

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