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Loans and Allowance for Loan Losses - Schedule of Allowance for Credit Losses on Financing Receivables (Details) - USD ($) $ in Thousands | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Balance | $ (5,459) | $ 5,344 | $ 5,922 |  |  |
Charge-offs | (1,160) | (488) | (1,166) |  |  |
Recoveries | 66 | 153 | 88 |  |  |
Provision for loan losses | 1,400 | 450 | 500 |  |  |
Balance | (5,765) | (5,459) | 5,344 |  |  |
Individually evaluated for loss |  |  |  | $ 310 | $ 642 | $ 274
Collectively evaluated for loss |  |  |  | 5,455 | 4,817 | 5,070
Total | (5,459) | (5,459) | 5,344 | (5,765) | (5,459) | 5,344
Individually evaluated for loss |  |  |  | 8,691 | 9,760 | 6,728
Collectively evaluated for loss |  |  |  | 486,556 | 429,476 | 419,041
Loans and Leases Receivable, Gross, Total |  |  |  | 495,247 | 439,236 | 425,769
One-to-Four Family Residential Real Estate Loans [Member] |  |  |  |  |  |
Balance | 542 | 504 | 925 |  |  |
Charge-offs | (32) | (37) | (14) |  |  |
Recoveries | 4 | 11 | 9 |  |  |
Provision for loan losses | (65) | 64 | (416) |  |  |
Balance | 449 | 542 | 504 |  |  |
Individually evaluated for loss |  |  |  | 100 | 73 |
Collectively evaluated for loss |  |  |  | 349 | 469 | 504
Total | 542 | 542 | 504 | 449 | 542 | 504
Individually evaluated for loss |  |  |  | 623 | 747 | 780
Collectively evaluated for loss |  |  |  | 136,272 | 135,468 | 136,066
Loans and Leases Receivable, Gross, Total |  |  |  | 136,895 | 136,215 | 136,846
Construction and Land Loan [Member] |  |  |  |  |  |
Balance | 181 | 53 | 77 |  |  |
Charge-offs |  |  |  |  |  |
Recoveries |  |  |  |  |  |
Provision for loan losses | (13) | 128 | (24) |  |  |
Balance | 168 | 181 | 53 |  |  |
Individually evaluated for loss |  |  |  | 103 | 102 |
Collectively evaluated for loss |  |  |  | 65 | 79 | 53
Total | 181 | 181 | 53 | 168 | 181 | 53
Individually evaluated for loss |  |  |  | 1,808 | 2,031 | 1,937
Collectively evaluated for loss |  |  |  | 18,275 | 17,325 | 11,801
Loans and Leases Receivable, Gross, Total |  |  |  | 20,083 | 19,356 | 13,738
Commercial Real Estate Loans [Member] |  |  |  |  |  |
Balance | 1,540 | 1,777 | 1,740 |  |  |
Charge-offs |  | (71) |  |  |  |
Recoveries | 1 |  |  |  |  |
Provision for loan losses | 145 | (166) | 37 |  |  |
Balance | 1,686 | 1,540 | 1,777 |  |  |
Individually evaluated for loss |  |  |  | 67 | 52 | 81
Collectively evaluated for loss |  |  |  | 1,619 | 1,488 | 1,696
Total | 1,540 | 1,540 | 1,777 | 1,686 | 1,540 | 1,777
Individually evaluated for loss |  |  |  | 3,912 | 3,973 | 2,445
Collectively evaluated for loss |  |  |  | 135,055 | 116,651 | 115,755
Loans and Leases Receivable, Gross, Total |  |  |  | 138,967 | 120,624 | 118,200
Commercial Loans [Member] |  |  |  |  |  |
Balance | 1,226 | 1,119 | 1,530 |  |  |
Charge-offs | (950) |  | (306) |  |  |
Recoveries | 22 | 20 | 34 |  |  |
Provision for loan losses | 753 | 87 | (139) |  |  |
Balance | 1,051 | 1,226 | 1,119 |  |  |
Individually evaluated for loss |  |  |  | 27 | 391 | 87
Collectively evaluated for loss |  |  |  | 1,024 | 835 | 1,032
Total | 1,051 | 1,226 | 1,119 | 1,051 | 1,226 | 1,119
Individually evaluated for loss |  |  |  | 1,528 | 2,002 | 355
Collectively evaluated for loss |  |  |  | 72,761 | 52,589 | 54,151
Loans and Leases Receivable, Gross, Total |  |  |  | 74,289 | 54,591 | 54,506
Agriculture Loans [Member] |  |  |  |  |  |
Balance | 1,812 | 1,684 | 1,428 |  |  |
Charge-offs |  | (45) | (375) |  |  |
Recoveries | 1 | 1 |  |  |  |
Provision for loan losses | 425 | 172 | 631 |  |  |
Balance | 2,238 | 1,812 | 1,684 |  |  |
Individually evaluated for loss |  |  |  | 13 | 24 | 89
Collectively evaluated for loss |  |  |  | 2,225 | 1,788 | 1,595
Total | 1,812 | 1,812 | 1,684 | 2,238 | 1,812 | 1,684
Individually evaluated for loss |  |  |  | 717 | 833 | 881
Collectively evaluated for loss |  |  |  | 95,915 | 82,175 | 77,443
Loans and Leases Receivable, Gross, Total |  |  |  | 96,632 | 83,008 | 78,324
Municipal Loans [Member] |  |  |  |  |  |
Balance | 8 | 12 | 23 |  |  |
Charge-offs |  |  |  |  |  |
Recoveries | 2 | 37 | 6 |  |  |
Provision for loan losses | (3) | (41) | (17) |  |  |
Balance | 7 | 8 | 12 |  |  |
Individually evaluated for loss |  |  |  |  |  |
Collectively evaluated for loss |  |  |  | 7 | 8 | 12
Total | 8 | 8 | 12 | 7 | 8 | 12
Individually evaluated for loss |  |  |  | 58 | 140 | 258
Collectively evaluated for loss |  |  |  | 2,895 | 3,256 | 3,626
Loans and Leases Receivable, Gross, Total |  |  |  | 2,953 | 3,396 | 3,884
Consumer Loans [Member] |  |  |  |  |  |
Balance | 150 | 195 | 199 |  |  |
Charge-offs | (178) | (335) | (471) |  |  |
Recoveries | 36 | 84 | 39 |  |  |
Provision for loan losses | 158 | 206 | 428 |  |  |
Balance | 166 | 150 | 195 |  |  |
Individually evaluated for loss |  |  |  |  |  | 17
Collectively evaluated for loss |  |  |  | 166 | 150 | 178
Total | $ 166 | $ 195 | $ 195 | 166 | 150 | 195
Individually evaluated for loss |  |  |  | 45 | 34 | 72
Collectively evaluated for loss |  |  |  | 25,383 | 22,012 | 20,199
Loans and Leases Receivable, Gross, Total |  |  |  | $ 25,428 | $ 22,046 | $ 20,271

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- Definition Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 + Details
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