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Loans - Analysis of Allowance for Credit Losses (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2014 | Mar. 31, 2013 | Dec. 31, 2013
ALLOWANCE FOR CREDIT LOSSES: |  |  |
Beginning balance | $ 5,357 | $ 5,386 | $ 5,386
Charge Offs | (366) | (116) | (1,262)
Recoveries | 69 | 69 | 374
Provision (Credit) | 428 | 167 |
Other Non-interest expense related to unfunded | 17 | 10 |
Ending Balance | 5,505 | 5,516 | 5,357
Ending balance: individually evaluated for impairment | 261 | 860 |
Ending balance: collectively evaluated for impairment | 5,244 | 4,656 |
Ending balance: loans acquired with deteriorated credit quality | 2 | 2 |
FINANCING RECEIVABLES: |  |  |
Ending balance | 582,872 | 484,828 |
Ending balance: individually evaluated for impairment | 2,059 | 4,145 |
Ending balance: collectively evaluated for impairment | 580,813 | 480,683 |
Ending balance: loans acquired with deteriorated credit quality | 536 | 556 |
Consumer Real Estate [Member] |  |  |
ALLOWANCE FOR CREDIT LOSSES: |  |  |
Beginning balance | 257 | 368 | 368
Charge Offs | (64) | (10) |
Recoveries | 10 | 4 |
Provision (Credit) | 199 | 101 |
Other Non-interest expense related to unfunded |  |  |
Ending Balance | 402 | 463 |
Ending balance: individually evaluated for impairment | 44 | 79 |
Ending balance: collectively evaluated for impairment | 358 | 384 |
Ending balance: loans acquired with deteriorated credit quality | 2 | 2 |
FINANCING RECEIVABLES: |  |  |
Ending balance | 91,368 | 77,160 |
Ending balance: individually evaluated for impairment | 181 | 310 |
Ending balance: collectively evaluated for impairment | 91,187 | 76,850 |
Ending balance: loans acquired with deteriorated credit quality | 536 | 556 |
Agricultural Real Estate [Member] |  |  |
ALLOWANCE FOR CREDIT LOSSES: |  |  |
Beginning balance | 131 | 113 | 113
Charge Offs |  |  |
Recoveries |  |  |
Provision (Credit) |  | (8) |
Other Non-interest expense related to unfunded |  |  |
Ending Balance | 131 | 105 |
Ending balance: individually evaluated for impairment |  |  |
Ending balance: collectively evaluated for impairment | 131 | 105 |
Ending balance: loans acquired with deteriorated credit quality |  |  |
FINANCING RECEIVABLES: |  |  |
Ending balance | 49,629 | 35,898 |
Ending balance: individually evaluated for impairment | 141 |  |
Ending balance: collectively evaluated for impairment | 49,488 | 35,898 |
Ending balance: loans acquired with deteriorated credit quality |  |  |
Agricultural [Member] |  |  |
ALLOWANCE FOR CREDIT LOSSES: |  |  |
Beginning balance | 326 | 290 | 290
Charge Offs |  |  |
Recoveries | 1 | 1 |
Provision (Credit) | (3) | (31) |
Other Non-interest expense related to unfunded |  |  |
Ending Balance | 324 | 260 |
Ending balance: individually evaluated for impairment |  |  |
Ending balance: collectively evaluated for impairment | 324 | 260 |
Ending balance: loans acquired with deteriorated credit quality |  |  |
FINANCING RECEIVABLES: |  |  |
Ending balance | 64,859 | 51,896 |
Ending balance: individually evaluated for impairment |  |  |
Ending balance: collectively evaluated for impairment | 64,859 | 51,896 |
Ending balance: loans acquired with deteriorated credit quality |  |  |
Commercial Real Estate [Member] |  |  |
ALLOWANCE FOR CREDIT LOSSES: |  |  |
Beginning balance | 2,107 | 1,749 | 1,749
Charge Offs | (201) | (20) |
Recoveries | 2 |  |
Provision (Credit) | 50 | (163) |
Other Non-interest expense related to unfunded |  |  |
Ending Balance | 1,958 | 1,566 |
Ending balance: individually evaluated for impairment | 107 | 29 |
Ending balance: collectively evaluated for impairment | 1,851 | 1,537 |
Ending balance: loans acquired with deteriorated credit quality |  |  |
FINANCING RECEIVABLES: |  |  |
Ending balance | 261,634 | 209,601 |
Ending balance: individually evaluated for impairment | 1,385 | 845 |
Ending balance: collectively evaluated for impairment | 260,249 | 208,756 |
Ending balance: loans acquired with deteriorated credit quality |  |  |
Commercial and Industrial [Member] |  |  |
ALLOWANCE FOR CREDIT LOSSES: |  |  |
Beginning balance | 1,359 | 2,183 | 2,183
Charge Offs |  |  |
Recoveries | 5 | 15 |
Provision (Credit) | (34) | (226) |
Other Non-interest expense related to unfunded |  |  |
Ending Balance | 1,330 | 1,972 |
Ending balance: individually evaluated for impairment | 110 | 752 |
Ending balance: collectively evaluated for impairment | 1,220 | 1,220 |
Ending balance: loans acquired with deteriorated credit quality |  |  |
FINANCING RECEIVABLES: |  |  |
Ending balance | 94,358 | 90,981 |
Ending balance: individually evaluated for impairment | 352 | 2,990 |
Ending balance: collectively evaluated for impairment | 94,006 | 87,991 |
Ending balance: loans acquired with deteriorated credit quality |  |  |
Consumer (incl. Credit Cards) [Member] |  |  |
ALLOWANCE FOR CREDIT LOSSES: |  |  |
Beginning balance | 292 | 268 | 268
Charge Offs | (101) | (86) |
Recoveries | 51 | 49 |
Provision (Credit) | 28 | 25 |
Other Non-interest expense related to unfunded |  |  |
Ending Balance | 270 | 256 |
Ending balance: individually evaluated for impairment |  |  |
Ending balance: collectively evaluated for impairment | 270 | 256 |
Ending balance: loans acquired with deteriorated credit quality |  |  |
FINANCING RECEIVABLES: |  |  |
Ending balance | 21,024 | 19,292 |
Ending balance: individually evaluated for impairment |  |  |
Ending balance: collectively evaluated for impairment | 21,024 | 19,292 |
Ending balance: loans acquired with deteriorated credit quality |  |  |
Unfunded Loan Commitment & Letters of Credit [Member] |  |  |
ALLOWANCE FOR CREDIT LOSSES: |  |  |
Beginning balance | 163 | 162 | 162
Charge Offs |  |  |
Recoveries |  |  |
Provision (Credit) |  |  |
Other Non-interest expense related to unfunded | 17 | 10 |
Ending Balance | 180 | 172 |
Ending balance: individually evaluated for impairment |  |  |
Ending balance: collectively evaluated for impairment | 180 | 172 |
Ending balance: loans acquired with deteriorated credit quality |  |  |
FINANCING RECEIVABLES: |  |  |
Ending balance |  |  |
Ending balance: individually evaluated for impairment |  |  |
Ending balance: collectively evaluated for impairment |  |  |
Ending balance: loans acquired with deteriorated credit quality |  |  |
Unallocated [Member] |  |  |
ALLOWANCE FOR CREDIT LOSSES: |  |  |
Beginning balance | 722 | 253 | 253
Charge Offs |  |  |
Recoveries |  |  |
Provision (Credit) | 188 | 469 |
Other Non-interest expense related to unfunded |  |  |
Ending Balance | 910 | 722 |
Ending balance: individually evaluated for impairment |  |  |
Ending balance: collectively evaluated for impairment | 910 | 722 |
Ending balance: loans acquired with deteriorated credit quality |  |  |
FINANCING RECEIVABLES: |  |  |
Ending balance |  |  |
Ending balance: individually evaluated for impairment |  |  |
Ending balance: collectively evaluated for impairment |  |  |
Ending balance: loans acquired with deteriorated credit quality |  |  |

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