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Allowance for Loan Losses - Allowance by Impairment Methodology and Loans by Impairment Methodology (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
Allowance for loan losses: |  |
Beginning Balance | $ 5,524 | $ 6,718
Charge-offs | (788) | (1,838)
Recoveries | 585 | 744
Provision for (recovery of) loan losses |  | (100)
Ending Balance | 5,321 | 5,524
Ending Balance: |  |
Allowance for loan losses, Individually evaluated for impairment | 37 | 544
Allowance for loan losses, Collectively evaluated for impairment | 5,284 | 4,980
Loans: |  |
Ending Balance | 486,067 | 438,999
Loans, Individually evaluated for impairment | 4,860 | 7,705
Loans, Collectively evaluated for impairment | 481,207 | 431,294
Construction and Land Development [Member] |  |
Allowance for loan losses: |  |
Beginning Balance | 1,532 | 1,403
Recoveries | 4 | 4
Provision for (recovery of) loan losses | (1,095) | 125
Ending Balance | 441 | 1,532
Ending Balance: |  |
Allowance for loan losses, Individually evaluated for impairment |  | 326
Allowance for loan losses, Collectively evaluated for impairment | 441 | 1,206
Loans: |  |
Ending Balance | 34,699 | 33,135
Loans, Individually evaluated for impairment | 1,973 | 2,544
Loans, Collectively evaluated for impairment | 32,726 | 30,591
Secured by 1-4 Family Residential [Member] |  |
Allowance for loan losses: |  |
Beginning Balance | 939 | 1,204
Charge-offs | (83) | (142)
Recoveries | 293 | 373
Provision for (recovery of) loan losses | (130) | (496)
Ending Balance | 1,019 | 939
Ending Balance: |  |
Allowance for loan losses, Individually evaluated for impairment | 37 | 23
Allowance for loan losses, Collectively evaluated for impairment | 982 | 916
Loans: |  |
Ending Balance | 198,763 | 189,286
Loans, Individually evaluated for impairment | 1,828 | 2,044
Loans, Collectively evaluated for impairment | 196,935 | 187,242
Other Real Estate [Member] |  |
Allowance for loan losses: |  |
Beginning Balance | 2,534 | 3,658
Charge-offs | (165) | (1,125)
Recoveries | 2 | 2
Provision for (recovery of) loan losses | 771 | (1)
Ending Balance | 3,142 | 2,534
Ending Balance: |  |
Allowance for loan losses, Individually evaluated for impairment |  | 195
Allowance for loan losses, Collectively evaluated for impairment | 3,142 | 2,339
Loans: |  |
Ending Balance | 211,210 | 181,447
Loans, Individually evaluated for impairment | 984 | 3,023
Loans, Collectively evaluated for impairment | 210,226 | 178,424
Commercial and Industrial [Member] |  |
Allowance for loan losses: |  |
Beginning Balance | 306 | 310
Charge-offs |  | (59)
Recoveries | 11 | 72
Provision for (recovery of) loan losses | 63 | (17)
Ending Balance | 380 | 306
Ending Balance: |  |
Allowance for loan losses, Collectively evaluated for impairment | 380 | 306
Loans: |  |
Ending Balance | 29,981 | 24,048
Loans, Individually evaluated for impairment | 75 | 94
Loans, Collectively evaluated for impairment | 29,906 | 23,954
Consumer and Other Loans [Member] |  |
Allowance for loan losses: |  |
Beginning Balance | 213 | 143
Charge-offs | (540) | (512)
Recoveries | 275 | 293
Provision for (recovery of) loan losses | 391 | 289
Ending Balance | 339 | 213
Ending Balance: |  |
Allowance for loan losses, Collectively evaluated for impairment | 339 | 213
Loans: |  |
Ending Balance | 11,414 | 11,083
Loans, Collectively evaluated for impairment | $ 11,414 | $ 11,083

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- Definition Financing receivable loans and leases receivable. + References No definition available. + Details
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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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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=66008989&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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- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + 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 (g) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 + Details
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- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + 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 (g) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 + Details
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- Definition The balance of financing receivables that were collectively evaluated for impairment. + 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 (h) -URI http://asc.fasb.org/extlink&oid=66008989&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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524 Reference 3: 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 Reference 4: http://www.xbrl.org/2003/role/presentationRef -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 Reference 5: http://www.xbrl.org/2003/role/presentationRef -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=6379141&loc=d3e15032-111544 + Details
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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. 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=65884687&loc=d3e4428-111522 + Details
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