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ALLOWANCE FOR LOAN LOSSES - Segregated by loan class (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Loan losses segregated by loan class |  |  |
Beginning balance | $ 25,006,000 | $ 25,315,000 | $ 24,952,000
Provision (recapture) for loan loss | (338,000) | 4,575,000 | 6,950,000
Charge-offs | (1,125,000) | (6,079,000) | (7,602,000)
Recoveries | 1,235,000 | 1,195,000 | 1,015,000
Net (charge-offs) recoveries | 110,000 | (4,884,000) | (6,587,000)
Ending balance | 24,778,000 | 25,006,000 | 25,315,000
Specific reserve |  |  |
Loan losses segregated by loan class |  |  |
Beginning balance | 668,000 | 389,000 |
Ending balance | 1,035,000 | 668,000 | 389,000
General reserve |  |  |
Loan losses segregated by loan class |  |  |
Beginning balance | 24,338,000 | 24,926,000 |
Ending balance | 23,743,000 | 24,338,000 | 24,926,000
Commercial and industrial |  |  |
Loan losses segregated by loan class |  |  |
Beginning balance | 6,409,000 | 4,746,000 | 7,160,000
Provision (recapture) for loan loss | 642,000 | 5,537,000 | 4,272,000
Charge-offs | (904,000) | (4,884,000) | (7,210,000)
Recoveries | 1,110,000 | 1,010,000 | 524,000
Net (charge-offs) recoveries | 206,000 | (3,874,000) | (6,686,000)
Ending balance | 7,257,000 | 6,409,000 | 4,746,000
Commercial and industrial | Specific reserve |  |  |
Loan losses segregated by loan class |  |  |
Beginning balance | 462,000 | 357,000 |
Ending balance | 852,000 | 462,000 | 357,000
Commercial and industrial | General reserve |  |  |
Loan losses segregated by loan class |  |  |
Beginning balance | 5,947,000 | 4,389,000 |
Ending balance | 6,405,000 | 5,947,000 | 4,389,000
Commercial real estate |  |  |
Loan losses segregated by loan class |  |  |
Beginning balance | 10,770,000 | 7,058,000 | 6,985,000
Provision (recapture) for loan loss | (284,000) | 4,193,000 | (189,000)
Charge-offs | (120,000) | (589,000) | (27,000)
Recoveries | 9,000 | 108,000 | 289,000
Net (charge-offs) recoveries | (111,000) | (481,000) | 262,000
Ending balance | 10,375,000 | 10,770,000 | 7,058,000
Commercial real estate | Specific reserve |  |  |
Loan losses segregated by loan class |  |  |
Beginning balance | 206,000 |  |
Ending balance | 64,000 | 206,000 |
Commercial real estate | General reserve |  |  |
Loan losses segregated by loan class |  |  |
Beginning balance | 10,564,000 | 7,058,000 |
Ending balance | 10,311,000 | 10,564,000 | 7,058,000
Construction and development |  |  |
Loan losses segregated by loan class |  |  |
Beginning balance | 4,598,000 | 4,504,000 | 2,991,000
Provision (recapture) for loan loss | (1,116,000) | 94,000 | 1,513,000
Ending balance | 3,482,000 | 4,598,000 | 4,504,000
Construction and development | Specific reserve |  |  |
Loan losses segregated by loan class |  |  |
Beginning balance |  | 26,000 |
Ending balance |  |  | 26,000
Construction and development | General reserve |  |  |
Loan losses segregated by loan class |  |  |
Beginning balance | 4,598,000 | 4,478,000 |
Ending balance | 3,482,000 | 4,598,000 | 4,478,000
One to four family residential |  |  |
Loan losses segregated by loan class |  |  |
Beginning balance | 1,286,000 | 2,295,000 | 1,843,000
Provision (recapture) for loan loss | 35,000 | (1,012,000) | 573,000
Charge-offs | (8,000) | (3,000) | (263,000)
Recoveries | 13,000 | 6,000 | 142,000
Net (charge-offs) recoveries | 5,000 | 3,000 | (121,000)
Ending balance | 1,326,000 | 1,286,000 | 2,295,000
One to four family residential | Specific reserve |  |  |
Loan losses segregated by loan class |  |  |
Ending balance | 119,000 |  |
One to four family residential | General reserve |  |  |
Loan losses segregated by loan class |  |  |
Beginning balance | 1,286,000 | 2,295,000 |
Ending balance | 1,207,000 | 1,286,000 | 2,295,000
Multi‑family residential |  |  |
Loan losses segregated by loan class |  |  |
Beginning balance | 916,000 | 762,000 | 500,000
Provision (recapture) for loan loss | 503,000 | 154,000 | 262,000
Ending balance | 1,419,000 | 916,000 | 762,000
Multi‑family residential | General reserve |  |  |
Loan losses segregated by loan class |  |  |
Beginning balance | 916,000 | 762,000 |
Ending balance | 1,419,000 | 916,000 | 762,000
Consumer |  |  |
Loan losses segregated by loan class |  |  |
Beginning balance | 353,000 | 363,000 | 423,000
Provision (recapture) for loan loss | 263,000 | 222,000 | (18,000)
Charge-offs | (93,000) | (277,000) | (102,000)
Recoveries | 43,000 | 45,000 | 60,000
Net (charge-offs) recoveries | (50,000) | (232,000) | (42,000)
Ending balance | 566,000 | 353,000 | 363,000
Consumer | Specific reserve |  |  |
Loan losses segregated by loan class |  |  |
Beginning balance |  | 6,000 |
Ending balance |  |  | 6,000
Consumer | General reserve |  |  |
Loan losses segregated by loan class |  |  |
Beginning balance | 353,000 | 357,000 |
Ending balance | 566,000 | 353,000 | 357,000
Agriculture |  |  |
Loan losses segregated by loan class |  |  |
Beginning balance | 79,000 | 93,000 | 118,000
Provision (recapture) for loan loss | (63,000) | 227,000 | (25,000)
Charge-offs |  | (267,000) |
Recoveries | 52,000 | 26,000 |
Net (charge-offs) recoveries | 52,000 | (241,000) |
Ending balance | 68,000 | 79,000 | 93,000
Agriculture | General reserve |  |  |
Loan losses segregated by loan class |  |  |
Beginning balance | 79,000 | 93,000 |
Ending balance | 68,000 | 79,000 | 93,000
Other |  |  |
Loan losses segregated by loan class |  |  |
Beginning balance | 595,000 | 5,494,000 | 4,932,000
Provision (recapture) for loan loss | (318,000) | (4,840,000) | 562,000
Charge-offs |  | (59,000) |
Recoveries | 8,000 |  |
Net (charge-offs) recoveries | 8,000 | (59,000) |
Ending balance | 285,000 | 595,000 | 5,494,000
Other | General reserve |  |  |
Loan losses segregated by loan class |  |  |
Beginning balance | 595,000 | 5,494,000 |
Ending balance | 285,000 | 595,000 | $ 5,494,000
Unfunded Loan Commitment |  |  |
Loan losses segregated by loan class |  |  |
Beginning balance | 366,000 |  |
Ending balance | $ 378,000 | $ 366,000 |

X
- 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=84173941&loc=SL6953423-111524 + 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=84173941&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 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=84173941&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=84173941&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=82894903&loc=d3e15032-111544 + Details
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