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Loans and Allowance for Loan Losses - Schedule of Impaired Financing Receivables (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2019 | Dec. 31, 2018
Unpaid contractual principal | $ 11,101 | $ 10,641
Impaired loan balance | 9,110 | 8,691
Impaired loans without an allowance | 7,426 | 5,994
Impaired loans with an allowance | 1,684 | 2,697
Related allowance recorded | 663 | 310
Year-to-date average loan balance | 7,874 | 9,745
Year-to-date interest income recognized | 440 | 603
One-to-Four Family Residential Real Estate Loans [Member] |  |
Unpaid contractual principal | 1,266 | 623
Impaired loan balance | 1,225 | 623
Impaired loans without an allowance | 855 | 413
Impaired loans with an allowance | 370 | 210
Related allowance recorded | 316 | 100
Year-to-date average loan balance | 1,253 | 640
Year-to-date interest income recognized | 8 | 10
Construction and Land Loan [Member] |  |
Unpaid contractual principal | 3,275 | 3,543
Impaired loan balance | 1,540 | 1,808
Impaired loans without an allowance | 1,348 | 1,383
Impaired loans with an allowance | 192 | 425
Related allowance recorded | 7 | 103
Year-to-date average loan balance | 195 | 2,689
Year-to-date interest income recognized | 28 | 53
Commercial Real Estate Loans [Member] |  |
Unpaid contractual principal | 3,472 | 3,912
Impaired loan balance | 3,472 | 3,912
Impaired loans without an allowance | 3,269 | 2,120
Impaired loans with an allowance | 203 | 1,792
Related allowance recorded | 112 | 67
Year-to-date average loan balance | 3,504 | 3,928
Year-to-date interest income recognized | 357 | 487
Commercial Loans [Member] |  |
Unpaid contractual principal | 1,047 | 1,528
Impaired loan balance | 1,047 | 1,528
Impaired loans without an allowance | 128 | 1,446
Impaired loans with an allowance | 919 | 82
Related allowance recorded | 228 | 27
Year-to-date average loan balance | 1,107 | 1,537
Year-to-date interest income recognized | 11 |
Agriculture Loans [Member] |  |
Unpaid contractual principal | 1,979 | 932
Impaired loan balance | 1,764 | 717
Impaired loans without an allowance | 1,764 | 529
Impaired loans with an allowance |  | 188
Related allowance recorded |  | 13
Year-to-date average loan balance | 1,753 | 844
Year-to-date interest income recognized | 35 | 52
Municipal Loans [Member] |  |
Unpaid contractual principal | 58 | 58
Impaired loan balance | 58 | 58
Impaired loans without an allowance | 58 | 58
Impaired loans with an allowance |  |
Related allowance recorded |  |
Year-to-date average loan balance | 58 | 58
Year-to-date interest income recognized | 1 | 1
Consumer Loans [Member] |  |
Unpaid contractual principal | 4 | 45
Impaired loan balance | 4 | 45
Impaired loans without an allowance | 4 | 45
Impaired loans with an allowance |  |
Related allowance recorded |  |
Year-to-date average loan balance | 4 | 49
Year-to-date interest income recognized |  |

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