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LOANS AND ALLOWANCE FOR LOAN LOSSES - Summary of Loan Portfolio by Type of Loan (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017 | Jun. 30, 2017 | Dec. 31, 2016
--- | --- | --- | --- | ---
Loans held for investment: |  |  |  |
Total loans | $ 1,593,474 | $ 1,359,544 | $ 1,296,843 |
Deferred loan fees | 857 | 1,094 |  |
Less: Allowance for loan losses | (13,890) | (12,859) | (12,525) | $ (11,484)
Total net loans | 1,580,441 | 1,347,779 |  |
Commercial and industrial |  |  |  |
Loans held for investment: |  |  |  |
Total loans | 234,396 | 197,508 | 217,497 |
Less: Allowance for loan losses | (1,742) | (1,581) | (2,008) | (1,592)
Construction and development |  |  |  |
Loans held for investment: |  |  |  |
Total loans | 211,745 | 196,774 | 177,600 |
Less: Allowance for loan losses | (1,642) | (1,724) | (1,554) | (1,161)
Commercial real estate |  |  |  |
Loans held for investment: |  |  |  |
Total loans | 570,448 | 418,137 | 378,722 |
Less: Allowance for loan losses | (5,556) | (4,585) | (3,464) | (3,264)
Farmland |  |  |  |
Loans held for investment: |  |  |  |
Total loans | 68,272 | 59,023 | 63,839 |
Less: Allowance for loan losses | (648) | (523) | (541) | (482)
1-4 family residential |  |  |  |
Loans held for investment: |  |  |  |
Total loans | 392,940 | 374,371 | 356,457 |
Less: Allowance for loan losses | (2,832) | (3,022) | (3,726) | (3,960)
Multi-family residential |  |  |  |
Loans held for investment: |  |  |  |
Total loans | 39,023 | 36,574 | 28,833 |
Less: Allowance for loan losses | (698) | (629) | (269) | (281)
Consumer |  |  |  |
Loans held for investment: |  |  |  |
Total loans | 52,949 | 51,267 | 51,677 |
Less: Allowance for loan losses | (522) | (602) | (585) | (585)
Agricultural |  |  |  |
Loans held for investment: |  |  |  |
Total loans | 23,362 | 25,596 | 21,854 |
Less: Allowance for loan losses | (238) | (187) | (371) | (153)
Overdrafts |  |  |  |
Loans held for investment: |  |  |  |
Total loans | 339 | 294 | 364 |
Less: Allowance for loan losses | $ (12) | $ (6) | $ (7) | $ (6)

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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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