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Loans - Analysis of Allowance for Credit Losses (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014 | Dec. 31, 2014
ALLOWANCE FOR CREDIT LOSSES: |  |  |  |  |
Beginning balance | $ 6,128 | $ 5,849 | $ 6,112 | $ 5,357 | $ 5,357
Charge Offs | (177) | (95) | (798) | (630) | (778)
Recoveries | 172 | 66 | 518 | 198 | 298
Provision (Credit) | 243 | 282 | 540 | 1,154 |
Other Non-interest expense related to unfunded | (5) | 10 | (11) | 33 |
Ending Balance | 6,361 | 6,112 | 6,361 | 6,112 | 6,112
Ending balance: individually evaluated for impairment | 465 | 202 | 465 | 202 |
Ending balance: collectively evaluated for impairment | 5,896 | 5,860 | 5,896 | 5,860 |
Ending balance: loans acquired with deteriorated credit quality | 1 | 2 | 1 | 2 |
FINANCING RECEIVABLES: |  |  |  |  |
Ending balance | 635,239 | 608,604 | 635,239 | 608,604 | 621,926
Ending balance: individually evaluated for impairment | 2,541 | 1,686 | 2,541 | 1,686 |
Ending balance: collectively evaluated for impairment | 632,698 | 606,918 | 632,698 | 606,918 |
Ending balance: loans acquired with deteriorated credit quality |  | 527 |  | 527 |
Agricultural Real Estate [Member] |  |  |  |  |
ALLOWANCE FOR CREDIT LOSSES: |  |  |  |  |
Beginning balance | 189 | 125 | 184 | 131 | 131
Provision (Credit) | 7 | 3 | 12 | (3) |
Ending Balance | 196 | 128 | 196 | 128 | 184
Ending balance: collectively evaluated for impairment | 196 | 128 | 196 | 128 |
FINANCING RECEIVABLES: |  |  |  |  |
Ending balance | 54,995 | 48,812 | 54,995 | 48,812 | 50,895
Ending balance: individually evaluated for impairment | 222 |  | 222 |  |
Ending balance: collectively evaluated for impairment | 54,773 | 48,812 | 54,773 | 48,812 |
Agricultural [Member] |  |  |  |  |
ALLOWANCE FOR CREDIT LOSSES: |  |  |  |  |
Beginning balance | 519 | 316 | 547 | 326 | 326
Recoveries | 61 | 1 | 64 | 4 |
Provision (Credit) | (60) | 18 | (91) | 6 |
Ending Balance | 520 | 335 | 520 | 335 | 547
Ending balance: collectively evaluated for impairment | 520 | 335 | 520 | 335 |
FINANCING RECEIVABLES: |  |  |  |  |
Ending balance | 73,310 | 67,221 | 73,310 | 67,221 | 74,611
Ending balance: collectively evaluated for impairment | 73,310 | 67,221 | 73,310 | 67,221 |
Commercial And Industrial and Industrial Development Bonds [Member] |  |  |  |  |
ALLOWANCE FOR CREDIT LOSSES: |  |  |  |  |
Beginning balance | 1,288 | 1,468 | 1,421 | 1,359 | 1,359
Charge Offs | (79) |  | (468) |  |
Recoveries | 66 | 5 | 88 | 15 |
Provision (Credit) | (125) | (149) | 109 | (49) |
Ending Balance | 1,150 | 1,324 | 1,150 | 1,324 | 1,421
Ending balance: individually evaluated for impairment | 188 | 203 | 188 | 203 |
Ending balance: collectively evaluated for impairment | 962 | 1,121 | 962 | 1,121 |
FINANCING RECEIVABLES: |  |  |  |  |
Ending balance | 91,114 | 97,780 | 91,114 | 97,780 | 104,824
Ending balance: individually evaluated for impairment | 771 | 812 | 771 | 812 |
Ending balance: collectively evaluated for impairment | 90,343 | 96,968 | 90,343 | 96,968 |
Unfunded Loan Commitment & Letters of Credit [Member] |  |  |  |  |
ALLOWANCE FOR CREDIT LOSSES: |  |  |  |  |
Beginning balance | 201 | 186 | 207 | 163 | 163
Other Non-interest expense related to unfunded | (5) | 10 | (11) | 33 |
Ending Balance | 196 | 196 | 196 | 196 | 207
Ending balance: collectively evaluated for impairment | 196 | 196 | 196 | 196 |
Receivables Acquired with Deteriorated Credit Quality [Member] |  |  |  |  |
FINANCING RECEIVABLES: |  |  |  |  |
Ending balance: loans acquired with deteriorated credit quality | 512 |  | 512 |  |
Consumer Real Estate [Member] |  |  |  |  |
ALLOWANCE FOR CREDIT LOSSES: |  |  |  |  |
Beginning balance | 309 | 569 | 537 | 257 | 257
Charge Offs |  |  |  | (130) |
Recoveries | 12 | 11 | 39 | 28 |
Provision (Credit) | 32 | 218 | (223) | 643 |
Ending Balance | 353 | 798 | 353 | 798 | 537
Ending balance: individually evaluated for impairment | 76 | 49 | 76 | 49 |
Ending balance: collectively evaluated for impairment | 277 | 749 | 277 | 749 |
Ending balance: loans acquired with deteriorated credit quality | 1 | 2 | 1 | 2 |
FINANCING RECEIVABLES: |  |  |  |  |
Ending balance | 88,020 | 97,651 | 88,020 | 97,651 | 97,550
Ending balance: individually evaluated for impairment | 506 | 165 | 506 | 165 |
Ending balance: collectively evaluated for impairment | 87,514 | 97,486 | 87,514 | 97,486 |
Ending balance: loans acquired with deteriorated credit quality |  | 527 |  | 527 |
Consumer Real Estate [Member] | Receivables Acquired with Deteriorated Credit Quality [Member] |  |  |  |  |
FINANCING RECEIVABLES: |  |  |  |  |
Ending balance: loans acquired with deteriorated credit quality | 512 |  | 512 |  |
Commercial Real Estate [Member] |  |  |  |  |
ALLOWANCE FOR CREDIT LOSSES: |  |  |  |  |
Beginning balance | 2,286 | 1,887 | 2,367 | 2,107 | 2,107
Charge Offs | (25) |  | (111) | (230) |
Recoveries | 1 |  | 203 | 3 |
Provision (Credit) | 144 | (54) | (53) | (48) |
Ending Balance | 2,406 | 1,833 | 2,406 | 1,833 | 2,367
Ending balance: individually evaluated for impairment | 201 |  | 201 |  |
Ending balance: collectively evaluated for impairment | 2,205 | 1,833 | 2,205 | 1,833 |
FINANCING RECEIVABLES: |  |  |  |  |
Ending balance | 301,342 | 274,074 | 301,342 | 274,074 | 270,188
Ending balance: individually evaluated for impairment | 1,042 | 709 | 1,042 | 709 |
Ending balance: collectively evaluated for impairment | 300,300 | 273,365 | 300,300 | 273,365 |
Consumer [Member] |  |  |  |  |
ALLOWANCE FOR CREDIT LOSSES: |  |  |  |  |
Beginning balance | 309 | 290 | 323 | 292 | 292
Charge Offs | (73) | (95) | (219) | (270) |
Recoveries | 32 | 49 | 124 | 148 |
Provision (Credit) | 56 | 57 | 96 | 131 |
Ending Balance | 324 | 301 | 324 | 301 | 323
Ending balance: collectively evaluated for impairment | 324 | 301 | 324 | 301 |
FINANCING RECEIVABLES: |  |  |  |  |
Ending balance | 26,458 | 23,066 | 26,458 | 23,066 | 23,858
Ending balance: collectively evaluated for impairment | 26,458 | 23,066 | 26,458 | 23,066 |
Unallocated [Member] |  |  |  |  |
ALLOWANCE FOR CREDIT LOSSES: |  |  |  |  |
Beginning balance | 1,027 | 1,008 | 526 | 722 | 722
Provision (Credit) | 189 | 189 | 690 | 474 |
Ending Balance | 1,216 | 1,197 | 1,216 | 1,197 | $ 526
Ending balance: collectively evaluated for impairment | $ 1,216 | $ 1,197 | $ 1,216 | $ 1,197 |

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- Definition Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5074-111524 + Details
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