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LOANS AND ALLOWANCE FOR LOAN LOSSES - Narrative (Detail) |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2016 USD ($) | Dec. 31, 2015 | Dec. 30, 2015 | Dec. 31, 2016 USD ($) note | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) note
Receivables [Abstract] |  |  |  |  |  |
Maximum percentage of loan-to-value ratio upon loan origination (no more than) |  |  |  | 80.00% |  |
Maximum percentage of loan-to-value ratios of the value of the real estate taken as collateral (no greater than) |  |  |  | 90.00% |  |
Maximum percentage of credit worthiness of the borrower |  |  |  | 43.00% |  |
Minimum amount of loan on which reviews have been made annually | $ 500,000 |  |  | $ 500,000 |  |
Loan on which reviews may require approval by the Chief Credit Officer | 1,000,000 |  |  | 1,000,000 |  |
Loan on which reviews require approval by the Officers' Loan Committee | 250,000 |  |  | $ 250,000 |  |
Period past due when loans are deemed impaired |  |  |  | 90 days |  |
Number of notes split | note |  |  |  | 2 |  |
Appraisals, required period interval |  |  |  | 18 months |  |
Minimum amount on which annual updated appraisals for criticized loans are required | $ 250,000 |  |  | $ 250,000 |  |
Percentage of strong loan-to-value (or lower) |  |  |  | 70.00% |  |
Look-back period for historical losses | 5 years | 4 years | 3 years |  |  |
Look-back, loss history weight, most recent 12 months |  |  | 50.00% |  |  |
Look-back, loss history weight, 2 years ago |  |  | 25.00% |  |  |
Look-back, loss history weight, 3 years ago |  |  | 25.00% |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Number of notes sold | note |  |  |  | 1 |  | 6
Carrying balance | $ 5,946,000 |  |  | $ 5,946,000 |  | $ 5,407,000
Cash proceeds |  |  |  | 5,100,000 | $ 0 | 5,743,000
Recovery (charge-off) between carrying balances of notes sold and cash received |  |  |  | $ (846,000) |  | $ 336,000
Minimum |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Historical loss percentage adjustment to anticipated loss allocation | (1.50%) | (1.50%) |  | (1.50%) | (1.50%) |
Maximum |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |  |  |
Historical loss percentage adjustment to anticipated loss allocation | 1.50% | 1.50% |  | 1.50% | 1.50% |

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- Definition The net gain (loss) resulting from a sale of loans, including adjustments to record loans classified as held-for-sale at the lower-of-cost-or-market and fair value adjustments to loan held for investment purposes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.3(a)) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13(h)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 + Details
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