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Loans - Analysis of Allowance for Credit Losses (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2016 | Mar. 31, 2015 | Dec. 31, 2015
ALLOWANCE FOR CREDIT LOSSES: |  |  |
Beginning balance | $ 6,265 | $ 6,112 | $ 6,112
Charge Offs | (84) | (92) | (1,030)
Recoveries | 35 | 50 | 557
Provision (Credit) | 277 | 114 |
Other Non-interest expense related to unfunded | 12 | (5) |
Ending Balance | 6,505 | 6,179 | 6,265
Ending balance: individually evaluated for impairment | 426 | 428 |
Ending balance: collectively evaluated for impairment | 6,079 | 5,751 |
Ending balance: loans acquired with deteriorated credit quality | 1 | 1 |
FINANCING RECEIVABLES: |  |  |
Ending balance | 707,660 | 614,709 | 685,878
Ending balance: individually evaluated for impairment | 2,211 | 2,243 |
Ending balance: collectively evaluated for impairment | 705,449 | 612,466 |
Agricultural Real Estate [Member] |  |  |
ALLOWANCE FOR CREDIT LOSSES: |  |  |
Beginning balance | 211 | 184 | 184
Provision (Credit) | 61 | 3 |
Ending Balance | 272 | 187 | 211
Ending balance: individually evaluated for impairment | 57 |  |
Ending balance: collectively evaluated for impairment | 215 | 187 |
FINANCING RECEIVABLES: |  |  |
Ending balance | 59,479 | 51,396 | 58,463
Ending balance: individually evaluated for impairment | 219 |  |
Ending balance: collectively evaluated for impairment | 59,260 | 51,396 |
Agricultural [Member] |  |  |
ALLOWANCE FOR CREDIT LOSSES: |  |  |
Beginning balance | 582 | 547 | 547
Recoveries | 4 | 1 |
Provision (Credit) | (38) | (24) |
Ending Balance | 548 | 524 | 582
Ending balance: individually evaluated for impairment |  | 24 |
Ending balance: collectively evaluated for impairment | 548 | 500 |
FINANCING RECEIVABLES: |  |  |
Ending balance | 78,021 | 71,571 | 82,762
Ending balance: individually evaluated for impairment |  | 24 |
Ending balance: collectively evaluated for impairment | 78,021 | 71,547 |
Commercial And Industrial and Industrial Development Bonds [Member] |  |  |
ALLOWANCE FOR CREDIT LOSSES: |  |  |
Beginning balance | 1,229 | 1,421 | 1,421
Charge Offs | (20) |  |
Recoveries | 3 | 5 |
Provision (Credit) | 39 | (7) |
Ending Balance | 1,251 | 1,419 | 1,229
Ending balance: individually evaluated for impairment | 113 | 238 |
Ending balance: collectively evaluated for impairment | 1,138 | 1,181 |
FINANCING RECEIVABLES: |  |  |
Ending balance | 109,386 | 99,895 | 106,689
Ending balance: individually evaluated for impairment | 181 | 827 |
Ending balance: collectively evaluated for impairment | 109,205 | 99,068 |
Unfunded Loan Commitment & Letters of Credit [Member] |  |  |
ALLOWANCE FOR CREDIT LOSSES: |  |  |
Beginning balance | 208 | 207 | 207
Other Non-interest expense related to unfunded | 12 | (5) |
Ending Balance | 220 | 202 | 208
Ending balance: collectively evaluated for impairment | 220 | 202 |
Receivables Acquired with Deteriorated Credit Quality [Member] |  |  |
FINANCING RECEIVABLES: |  |  |
Ending balance: loans acquired with deteriorated credit quality | 502 | 520 |
Consumer Real Estate [Member] |  |  |
ALLOWANCE FOR CREDIT LOSSES: |  |  |
Beginning balance | 338 | 537 | 537
Recoveries | 2 | 2 |
Provision (Credit) | 117 | (42) |
Ending Balance | 457 | 497 | 338
Ending balance: individually evaluated for impairment | 104 | 35 |
Ending balance: collectively evaluated for impairment | 353 | 462 |
Ending balance: loans acquired with deteriorated credit quality | 1 | 1 |
FINANCING RECEIVABLES: |  |  |
Ending balance | 88,097 | 97,019 | 87,947
Ending balance: individually evaluated for impairment | 874 | 253 |
Ending balance: collectively evaluated for impairment | 87,223 | 96,766 |
Consumer Real Estate [Member] | Receivables Acquired with Deteriorated Credit Quality [Member] |  |  |
FINANCING RECEIVABLES: |  |  |
Ending balance: loans acquired with deteriorated credit quality | 502 | 520 |
Commercial Real Estate [Member] |  |  |
ALLOWANCE FOR CREDIT LOSSES: |  |  |
Beginning balance | 2,516 | 2,367 | 2,367
Charge Offs | (3) |  |
Recoveries | 1 | 1 |
Provision (Credit) | 164 | (156) |
Ending Balance | 2,678 | 2,212 | 2,516
Ending balance: individually evaluated for impairment | 152 | 131 |
Ending balance: collectively evaluated for impairment | 2,526 | 2,081 |
FINANCING RECEIVABLES: |  |  |
Ending balance | 344,661 | 271,201 | 322,230
Ending balance: individually evaluated for impairment | 937 | 1,139 |
Ending balance: collectively evaluated for impairment | 343,724 | 270,062 |
Consumer [Member] |  |  |
ALLOWANCE FOR CREDIT LOSSES: |  |  |
Beginning balance | 337 | 323 | 323
Charge Offs | (61) | (92) |
Recoveries | 25 | 41 |
Provision (Credit) | 34 | 12 |
Ending Balance | 335 | 284 | 337
Ending balance: collectively evaluated for impairment | 335 | 284 |
FINANCING RECEIVABLES: |  |  |
Ending balance | 28,016 | 23,627 | 27,787
Ending balance: collectively evaluated for impairment | 28,016 | 23,627 |
Unallocated [Member] |  |  |
ALLOWANCE FOR CREDIT LOSSES: |  |  |
Beginning balance | 844 | 526 | 526
Provision (Credit) | (100) | 328 |
Ending Balance | 744 | 854 | $ 844
Ending balance: collectively evaluated for impairment | $ 744 | $ 854 |

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- Definition Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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 + Details
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