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Loans, Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of period | $ 13,304 | $ 11,941 | $ 12,884 | $ 11,190
Charge-offs | (34) | (48) | (387) | (225)
Recoveries | 9 | 15 | 32 | 118
Provision (Credit) | 400 | 475 | 1,150 | 1,300
Balance at end of period | 13,679 | 12,383 | 13,679 | 12,383
Real Estate Loans [Member] | Residential [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of period | 1,066 | 1,045 | 1,105 | 1,049
Charge-offs | (24) | (10) | (24) | (27)
Recoveries | 0 | 1 | 0 | 70
Provision (Credit) | 49 | 16 | 10 | (40)
Balance at end of period | 1,091 | 1,052 | 1,091 | 1,052
Real Estate Loans [Member] | Commercial [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of period | 4,400 | 3,794 | 4,115 | 3,867
Charge-offs | 0 | (25) | (293) | (25)
Recoveries | 0 | 0 | 0 | 3
Provision (Credit) | 241 | 156 | 819 | 80
Balance at end of period | 4,641 | 3,925 | 4,641 | 3,925
Real Estate Loans [Member] | Agricultural [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of period | 4,532 | 3,673 | 4,264 | 3,143
Charge-offs | 0 |  | 0 | 0
Recoveries | 0 |  | 0 |
Provision (Credit) | 180 | 256 | 448 | 786
Balance at end of period | 4,712 | 3,929 | 4,712 | 3,929
Real Estate Loans [Member] | Construction [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of period | 36 | 44 | 58 | 23
Charge-offs | 0 | 0 | 0 | 0
Recoveries | 0 | 0 | 0 | 0
Provision (Credit) | (17) | 5 | (39) | 26
Balance at end of period | 19 | 49 | 19 | 49
Consumer [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of period | 118 | 115 | 120 | 124
Charge-offs | (10) | (13) | (32) | (32)
Recoveries | 6 | 9 | 24 | 26
Provision (Credit) | 5 | 12 | 7 | 5
Balance at end of period | 119 | 123 | 119 | 123
Other Commercial Loans [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of period | 1,328 | 1,266 | 1,354 | 1,272
Charge-offs | 0 | 0 | (38) | (91)
Recoveries | 3 | 5 | 8 | 19
Provision (Credit) | 18 | (52) | 25 | 19
Balance at end of period | 1,349 | 1,219 | 1,349 | 1,219
Other Agricultural Loans [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of period | 741 | 589 | 752 | 492
Charge-offs | 0 | 0 | 0 | (50)
Recoveries | 0 | 0 | 0 | 0
Provision (Credit) | 128 | 110 | 117 | 257
Balance at end of period | 869 | 699 | 869 | 699
State and Political Subdivision Loans [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of period | 539 | 767 | 762 | 816
Charge-offs | 0 | 0 | 0 | 0
Recoveries | 0 | 0 | 0 | 0
Provision (Credit) | (3) | (16) | (226) | (65)
Balance at end of period | 536 | 751 | 536 | 751
Unallocated [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |
Balance at beginning of period | 544 | 648 | 354 | 404
Charge-offs | 0 | 0 | 0 | 0
Recoveries | 0 | 0 | 0 | 0
Provision (Credit) | (201) | (12) | (11) | 232
Balance at end of period | $ 343 | $ 636 | $ 343 | $ 636

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- Definition Amount of recovery of financing receivables doubtful of collection that were previously charged off. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=118955255&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -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 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447 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)(4) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 + Details
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