LOANS AND THE ALLOWANCE FOR LOAN LOSSES - Summary (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Activity in the allowance for loan losses
Allowance for loan losses at beginning of period	$ 20,509	$ 19,765	$ 19,708
Provision for loan losses	3,404	5,697	3,139
Charge-offs	(3,273)	(6,485)	(5,016)
Recoveries	1,659	1,532	1,934
Allowance for loan losses at end of period	22,299	20,509	19,765
Commercial and industrial
Activity in the allowance for loan losses
Allowance for loan losses at beginning of period	3,748	5,411	4,870
Provision for loan losses	1,139	(532)	2,133
Charge-offs	(886)	(1,446)	(1,780)
Recoveries	440	315	188
Allowance for loan losses at end of period	4,441	3,748	5,411
Agricultural and farmland
Activity in the allowance for loan losses
Allowance for loan losses at beginning of period	2,650	2,385	3,455
Provision for loan losses	146	265	(1,067)
Charge-offs	(30)		(3)
Allowance for loan losses at end of period	2,766	2,650	2,385
Commercial real estate - owner occupied
Activity in the allowance for loan losses
Allowance for loan losses at beginning of period	2,506	1,510	1,622
Provision for loan losses	(376)	3,294	(118)
Charge-offs	(407)	(2,352)	(32)
Recoveries	56	54	38
Allowance for loan losses at end of period	1,779	2,506	1,510
Commercial real estate - non-owner occupied
Activity in the allowance for loan losses
Allowance for loan losses at beginning of period	2,644	2,476	2,701
Provision for loan losses	1,110	264	(243)
Charge-offs	(111)	(237)	(940)
Recoveries	20	141	958
Allowance for loan losses at end of period	3,663	2,644	2,476
Multi-family
Activity in the allowance for loan losses
Allowance for loan losses at beginning of period	912	997	1,282
Provision for loan losses	153	109	(132)
Charge-offs	(41)	(194)	(153)
Allowance for loan losses at end of period	1,024	912	997
Construction and land development
Activity in the allowance for loan losses
Allowance for loan losses at beginning of period	4,176	2,981	1,983
Provision for loan losses	(1,640)	993	1,474
Charge-offs	(9)	(58)	(503)
Recoveries	450	260	27
Allowance for loan losses at end of period	2,977	4,176	2,981
One-to-four family residential
Activity in the allowance for loan losses
Allowance for loan losses at beginning of period	2,782	2,723	2,720
Provision for loan losses	513	984	376
Charge-offs	(1,105)	(1,415)	(787)
Recoveries	350	490	414
Allowance for loan losses at end of period	2,540	2,782	2,723
Municipal, consumer, and other
Activity in the allowance for loan losses
Allowance for loan losses at beginning of period	1,091	1,282	1,075
Provision for loan losses	2,359	320	716
Charge-offs	(684)	(783)	(818)
Recoveries	343	272	309
Allowance for loan losses at end of period	$ 3,109	$ 1,091	$ 1,282

Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

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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.

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Amount of expense related to estimated loss from loan and lease transactions.

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