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Loans and Allowance for Loan Losses, Impaired Financing Receivable (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment | $ 83,146,000 | $ 58,979,000 | $ 33,750,000
Unpaid principal balance | 83,337,000 | 59,354,000 | 34,242,000
Related allowance | 3,964,000 | 2,198,000 | 1,092,000
Average balance of impaired loans | 75,257,000 | 40,830,000 | 32,474,000
Interest income recognized | 469,000 | 95,000 | 159,000
Impaired loans with an allowance |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment | 44,794,000 | 24,921,000 | 8,396,000
Unpaid principal balance | 44,914,000 | 25,114,000 | 8,754,000
Related allowance | 3,964,000 | 2,198,000 | 1,092,000
Average balance of impaired loans | 34,615,000 | 17,191,000 | 15,473,000
Interest income recognized | 0 | 0 | 0
Impaired loans with an allowance | Commercial Real Estate |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment | 14,114,000 | 1,850,000 | 442,000
Unpaid principal balance | 14,124,000 | 1,863,000 | 452,000
Related allowance | 724,000 | 95,000 | 60,000
Average balance of impaired loans | 10,260,000 | 650,000 | 537,000
Interest income recognized | 0 | 0 | 0
Impaired loans with an allowance | Consumer Real Estate |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment | 19,864,000 | 8,028,000 | 3,300,000
Unpaid principal balance | 19,991,000 | 8,079,000 | 3,303,000
Related allowance | 1,443,000 | 410,000 | 690,000
Average balance of impaired loans | 13,154,000 | 4,990,000 | 6,503,000
Interest income recognized | 0 | 0 | 0
Impaired loans with an allowance | Construction and Land Development |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment | 581,000 | 2,522,000 | 84,000
Unpaid principal balance | 579,000 | 2,528,000 | 129,000
Related allowance | 28,000 | 66,000 | 20,000
Average balance of impaired loans | 1,157,000 | 567,000 | 77,000
Interest income recognized | 0 | 0 | 0
Impaired loans with an allowance | Commercial and Industrial |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment | 9,252,000 | 12,521,000 | 4,054,000
Unpaid principal balance | 9,215,000 | 12,644,000 | 4,051,000
Related allowance | 1,441,000 | 1,627,000 | 95,000
Average balance of impaired loans | 9,326,000 | 10,559,000 | 5,868,000
Interest income recognized | 0 | 0 | 0
Impaired loans with an allowance | Consumer and Other |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment | 983,000 | 0 | 516,000
Unpaid principal balance | 1,005,000 | 0 | 819,000
Related allowance | 328,000 | 0 | 227,000
Average balance of impaired loans | 718,000 | 425,000 | 2,488,000
Interest income recognized | 0 | 0 | 0
Impaired loans without an allowance |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment | 38,352,000 | 34,058,000 | 25,354,000
Unpaid principal balance | 38,423,000 | 34,240,000 | 25,488,000
Related allowance | 0 | 0 | 0
Average balance of impaired loans | 40,642,000 | 23,639,000 | 17,001,000
Interest income recognized | 469,000 | 95,000 | 159,000
Impaired loans without an allowance | Commercial Real Estate |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment | 14,724,000 | 16,364,000 | 2,308,000
Unpaid principal balance | 14,739,000 | 16,514,000 | 2,312,000
Related allowance | 0 | 0 | 0
Average balance of impaired loans | 17,906,000 | 6,983,000 | 2,346,000
Interest income recognized | 469,000 | 0 | 0
Impaired loans without an allowance | Consumer Real Estate |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment | 7,247,000 | 4,144,000 | 5,641,000
Unpaid principal balance | 7,271,000 | 4,174,000 | 5,674,000
Related allowance | 0 | 0 | 0
Average balance of impaired loans | 5,477,000 | 5,727,000 | 2,065,000
Interest income recognized | 0 | 0 | 0
Impaired loans without an allowance | Construction and Land Development |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment | 1,786,000 | 2,645,000 | 3,128,000
Unpaid principal balance | 1,786,000 | 2,650,000 | 3,135,000
Related allowance | 0 | 0 | 0
Average balance of impaired loans | 1,463,000 | 1,890,000 | 3,403,000
Interest income recognized | 0 | 95,000 | 159,000
Impaired loans without an allowance | Commercial and Industrial |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment | 14,595,000 | 10,905,000 | 14,277,000
Unpaid principal balance | 14,627,000 | 10,902,000 | 14,367,000
Related allowance | 0 | 0 | 0
Average balance of impaired loans | 15,796,000 | 9,039,000 | 9,187,000
Interest income recognized | 0 | 0 | 0
Impaired loans without an allowance | Consumer and Other |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Financing Receivable, Recorded Investment | 0 | 0 | 0
Unpaid principal balance | 0 | 0 | 0
Related allowance | 0 | 0 | 0
Average balance of impaired loans | 0 | 0 | 0
Interest income recognized | $ 0 | $ 0 | $ 0

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