Investar Holding (ISTR) 10-K 15 Mar 19 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2018	Mar. 13, 2019	Jun. 30, 2018
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Trading Symbol	ISTR
Entity Registrant Name	INVESTAR HOLDING CORP
Entity Central Index Key	0001602658
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Public Float			$ 264,915,590
Entity Common Stock, Shares Outstanding		10,157,087

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
ASSETS
Cash and due from banks	$ 15,922	$ 19,619
Interest-bearing balances due from other banks	1,212	10,802
Federal funds sold	6	0
Cash and cash equivalents	17,140	30,421
Available for sale securities at fair value (amortized cost of $253,504 and $220,077, respectively)	248,981	217,564
Held to maturity securities at amortized cost (estimated fair value of $15,805 and $17,947, respectively)	16,066	17,997
Loans, net of allowance for loan losses of $9,454 and $7,891, respectively	1,391,371	1,250,888
Equity securities	13,562	9,798
Bank premises and equipment, net of accumulated depreciation of $9,898 and $7,825, respectively	40,229	37,540
Other real estate owned, net	3,611	3,837
Accrued interest receivable	5,553	4,688
Deferred tax asset	1,145	1,294
Goodwill and other intangible assets, net	19,787	19,926
Bank owned life insurance	23,859	23,231
Other assets	5,165	5,550
Total assets	1,786,469	1,622,734
LIABILITIES
Noninterest-bearing	217,457	216,599
Interest-bearing	1,144,274	1,008,638
Total deposits	1,361,731	1,225,237
Advances from Federal Home Loan Bank	206,490	166,658
Repurchase agreements	1,999	21,935
Subordinated debt, net of unamortized issuance costs	18,215	18,168
Junior subordinated debt	5,845	5,792
Accrued taxes and other liabilities	9,927	12,215
Total liabilities	1,604,207	1,450,005
STOCKHOLDERS’ EQUITY
Preferred stock, no par value per share; 5,000,000 shares authorized	0	0
Common stock, $1.00 par value per share; 40,000,000 shares authorized; 9,484,219 and 9,514,926 shares issued and outstanding, respectively	9,484	9,515
Surplus	130,133	131,582
Retained earnings	45,721	33,203
Accumulated other comprehensive loss	(3,076)	(1,571)
Total stockholders’ equity	182,262	172,729
Total liabilities and stockholders’ equity	$ 1,786,469	$ 1,622,734

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Available-for-sale securities at fair value, amortized cost	$ 253,504	$ 220,077
Held-to-maturity securities at amortized cost, estimated fair value	15,805	17,947
Allowance for loan losses	9,454	7,891
Bank premises and equipment, accumulated depreciation	$ 9,898	$ 7,825
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	40,000,000	40,000,000
Common stock, shares issued (in shares)	9,484,219	9,514,926
Common stock, shares outstanding (in shares)	9,484,219	9,514,926

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
INTEREST INCOME
Interest and fees on loans	$ 66,750	$ 47,863	$ 39,380
Interest on investment securities	6,608	5,055	3,565
Other interest income	533	428	207
Total interest income	73,891	53,346	43,152
INTEREST EXPENSE
Interest on deposits	11,394	8,050	7,182
Interest on borrowings	5,127	2,779	1,231
Total interest expense	16,521	10,829	8,413
Net interest income	57,370	42,517	34,739
Provision for loan losses	2,570	1,540	2,079
Net interest income after provision for loan losses	54,800	40,977	32,660
NONINTEREST INCOME
Service charges on deposit accounts	1,453	767	343
Gain on sale of investment securities, net	14	292	443
Gain on sale of fixed assets, net	98	127	1,266
(Loss) gain on sale of other real estate owned, net	(24)	27	13
Gain on sale of loans, net	0	0	405
Servicing fees and fee income on serviced loans	963	1,482	2,087
Interchange fees	932	537	381
Income from bank owned life insurance	628	245	189
Change in the fair value of equity securities	(267)	0	0
Other operating income	521	338	341
Total noninterest income	4,318	3,815	5,468
Income before noninterest expense	59,118	44,792	38,128
NONINTEREST EXPENSE
Depreciation and amortization	2,553	1,865	1,493
Salaries and employee benefits	25,469	18,681	15,609
Occupancy	1,378	1,150	995
Data processing	2,090	1,690	1,488
Marketing	237	422	386
Professional fees	1,051	950	1,261
Customer reimbursements	0	0	584
Acquisition expense	1,445	1,868	0
Other operating expenses	7,659	5,716	4,823
Total noninterest expense	41,882	32,342	26,639
Income before income tax expense	17,236	12,450	11,489
Income tax expense	3,630	4,248	3,609
Net income	$ 13,606	$ 8,202	$ 7,880
EARNINGS PER SHARE
Basic earnings per share (in dollars per share)	$ 1.41	$ 0.96	$ 1.11
Diluted earnings per share (in dollars per share)	1.39	0.96	1.10
Cash dividends declared per common share (in dollars per share)	$ 0.17	$ 0.10	$ 0.04

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 13,606	$ 8,202	$ 7,880
Unrealized gain (loss) on investment securities:
Unrealized (loss) gain, available for sale, net of tax (benefit) expense of ($419), $88, and ($808), respectively	(1,576)	330	(1,500)
Reclassification of realized gain, net of tax expense of $3, $61, and $155, respectively	(11)	(231)	(287)
Unrealized loss, transfer from available for sale to held to maturity, net of tax benefit of $0, $0, and $1, respectively	(2)	(1)	(4)
Fair value of derivative financial instruments
Change in fair value of interest rate swap designated as a cash flow hedge, net of tax expense of $22, $107, and $206, respectively	84	402	383
Total other comprehensive (loss) income	(1,505)	500	(1,408)
Total comprehensive income	$ 12,101	$ 8,702	$ 6,472

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Unrealized (loss) gain, available for sale, tax (benefit) expense	$ (419)	$ 88	$ (808)
Reclassification of realized gain, tax expense	3	61	155
Unrealized loss, transfer from available for sale to held to maturity, tax benefit	0	0	1
Change in fair value of interest rate swap designated as a cash flow hedge, tax expense	$ 22	$ 107	$ 206

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands		Total	Common Stock	Surplus	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning Balance at Dec. 31, 2015		$ 109,350	$ 7,264	$ 84,099	$ 18,650	$ (663)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Surrendered shares		(65)	(4)	(61)
Shares repurchased		(3,473)	(222)	(3,251)
Options and warrants exercised		165	12	153
Dividends declared		(303)			(303)
Stock-based compensation and other activity		609	52	557
Net tax effect of stock-based compensation		2		2
Net income		7,880			7,880
Other comprehensive loss, net		(1,408)				(1,408)
Ending Balance at Dec. 31, 2016		112,757	7,102	81,499	26,227	(2,071)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued in offering, net of direct costs of $1,991		32,509	1,624	30,885
Common stock issued in acquisition, net of issuance costs		18,696	800	17,896
Surrendered shares		(168)	(8)	(160)
Shares repurchased		(506)	(23)	(483)
Options and warrants exercised		1,172	87	1,085
Dividends declared		(948)			(948)
Stock-based compensation and other activity		786	(67)	853
Net tax effect of stock-based compensation		7		7
Net income		8,202			8,202
Other comprehensive loss, net		500
Other comprehensive income, net, including Tax Cut And Jobs Act adjustment, net	[1]	222			(278)	500
Ending Balance at Dec. 31, 2017		172,729	9,515	131,582	33,203	(1,571)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Surrendered shares		(219)	(9)	(210)
Shares repurchased		(3,368)	(132)	(3,236)
Options and warrants exercised		1,036	76	960
Dividends declared		(1,640)			(1,640)
Stock-based compensation and other activity		1,071	34	1,037
Reclassification of tax effects of the Tax Cuts and Jobs Act	[2]	557			557
Net income		13,606			13,606
Other comprehensive loss, net		(1,505)				(1,505)
Ending Balance at Dec. 31, 2018		$ 182,262	$ 9,484	$ 130,133	$ 45,721	$ (3,076)
[1]	The Tax Cuts and Jobs Act (“TCJA”), enacted on December 22, 2017, required the revaluation of the Company’s deferred tax assets and liabilities as of December 31, 2017 as a result of the lower corporate tax rates to be realized beginning January 1, 2018. The $0.3 million adjustment to retained earnings represents the reclassification of the tax effects, or “stranded OCI” remaining in accumulated other comprehensive income after the revaluation of the Company’s deferred tax assets and liabilities.
[2]	The $0.6 million adjustment to retained earnings for the period ended December 31, 2018 represents a reclassification of the tax effects of the TCJA.

CONSOLIDATED STATEMENTS OF CH_2

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)$ / shares
Stock issuance cost	$ 1,991
Cash dividends declared per common share (in dollars per share) | $ / shares	$ 0.10
Other comprehensive income, net, including Tax Cut And Jobs Act adjustment, net	$ (222)	[1]
Retained Earnings
Other comprehensive income, net, including Tax Cut And Jobs Act adjustment, net	$ 278	[1]
[1]	The Tax Cuts and Jobs Act (“TCJA”), enacted on December 22, 2017, required the revaluation of the Company’s deferred tax assets and liabilities as of December 31, 2017 as a result of the lower corporate tax rates to be realized beginning January 1, 2018. The $0.3 million adjustment to retained earnings represents the reclassification of the tax effects, or “stranded OCI” remaining in accumulated other comprehensive income after the revaluation of the Company’s deferred tax assets and liabilities.

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities
Net income	$ 13,606	$ 8,202	$ 7,880
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	2,553	1,865	1,493
Provision for loan losses	2,570	1,540	2,079
Amortization of purchase accounting adjustments	(2,180)	(489)	(39)
Provision for other real estate owned	567	183	7
Net amortization of securities	478	1,114	1,304
Gain on sale of investment securities, net	(14)	(292)	(443)
Gain on sale of fixed assets, net	(98)	(127)	(1,266)
Impairment of investment in tax credit entity	0	0	11
Loss (gain) on sale of other real estate owned, net	24	(27)	(13)
FHLB stock dividend	(239)	(99)	(66)
Stock-based compensation	1,071	786	609
Deferred taxes	841	245	(207)
Net change in value of bank owned life insurance	(628)	(245)	(189)
Amortization of subordinated debt issuance costs	46	35	0
Unrealized loss on equity securities	267	0	0
Loans held for sale:
Originations	0	0	(494)
Proceeds from sales	0	0	29,013
Gain on sale of loans	0	0	(405)
Net change in:
Accrued interest receivable	(865)	(321)	(387)
Other assets	995	(639)	581
Accrued taxes and other liabilities	(2,582)	(2,274)	(2,164)
Net cash provided by operating activities	16,412	9,457	37,304
Cash flows from investing activities
Proceeds from sales of investment securities available for sale	7,021	106,448	15,515
Purchases of securities available for sale	(72,258)	(104,209)	(87,340)
Proceeds from maturities, prepayments and calls of investment securities available for sale	30,545	29,295	18,627
Proceeds from maturities, prepayments and calls of investment securities held to maturity	1,884	2,021	6,217
Proceeds from redemption or sale of equity securities	1,299	2,000	2,800
Purchases of equity securities	(4,265)	(4,844)	(2,261)
Net increase in loans	(141,505)	(133,708)	(100,634)
Proceeds from sales of other real estate owned	132	591	541
Purchases of other real estate owned	(257)	0	0
Proceeds from sales of fixed assets	19	625	2,686
Purchases of fixed assets	(4,936)	(2,081)	(3,964)
Acquisition of trademark intangible	0	0	(100)
Purchase of bank owned life insurance	0	(15,000)	(3,500)
Purchase of other investments	(119)	(711)	(553)
Distributions from investments	39	24	0
Cash paid for Citizens, net of cash acquired	0	(1,235)	0
Cash acquired from BOJ, net of cash paid	0	22,436	0
Net cash used in investing activities	(182,401)	(98,348)	(151,966)
Cash flows from financing activities
Net increase (decrease) in customer deposits	136,644	(20,467)	170,436
Net decrease in repurchase agreements	(19,936)	(17,152)	(12)
Net increase (decrease) in short-term FHLB advances	22,900	43,500	(33,780)
Proceeds from long-term FHLB advances	75,000	55,000	5,000
Repayment of long-term FHLB advances	(58,100)	(20,603)	(15,914)
Cash dividends paid on common stock	(1,468)	(722)	(278)
Payments to repurchase common stock	(3,368)	(506)	(3,473)
Proceeds from public offering of common stock, net of issuance costs	0	32,509	0
Proceeds from stock options and warrants exercised	1,036	1,172	165
Proceeds from other borrowings	0	78	1,000
Repayments of other borrowings	0	(1,078)	0
Proceeds from subordinated debt, net of issuance costs	0	18,133	0
Net cash provided by (used in) financing activities	152,708	89,864	123,144
Net (decrease) increase in cash and cash equivalents	(13,281)	973	8,482
Cash and cash equivalents, beginning of period	30,421	29,448	20,966
Cash and cash equivalents, end of period	17,140	30,421	29,448
Cash payments for:
Income taxes	2,555	4,375	2,850
Transfer from bank premises and equipment to other assets	16,139	10,201	8,294
SUPPLEMENTAL DISCLOSURES OF NONCASH INVESTING ACTIVITIES
Transfer from loans to other real estate owned	239	42	3,875
Transfer from bank premises and equipment to other assets	$ 0	$ 1,146	$ 0

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Nature of Operations Investar Holding Corporation (the “Company”) is a financial holding company headquartered in Baton Rouge, Louisiana, that provides, through its wholly-owned subsidiary, Investar Bank (the “Bank”), full banking services, excluding trust services, tailored primarily to meet the needs of individuals and small to medium-sized businesses throughout its Louisiana markets of Baton Rouge, New Orleans, and Lafayette and their greater surrounding areas, and as of March 1, 2019, the greater Houston, Texas market. Basis of Presentation The consolidated financial statements of Investar Holding Corporation and its wholly-owned subsidiary, the Bank, have been prepared in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and to generally accepted practices within the banking industry. Segments While our chief decision maker monitors the revenue streams of the various banking products and services, operations are managed and financial performance is evaluated on a Company-wide basis. Accordingly, all of the Company’s banking operations are considered by management to be aggregated in one reportable operating segment. Because the overall banking operations comprise substantially all of the consolidated operations, no separate segment disclosures are presented in the accompanying consolidated financial statements. Principles of Consolidation The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiary, the Bank. All significant intercompany accounts and transactions have been eliminated in consolidation. Use of Estimates The preparation of statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements as well as the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates, and such differences could be material. Material estimates that are particularly susceptible to significant change relate to the determination of the allowance for loan losses. While management uses available information to recognize losses on loans, future additions to the allowance may be necessary based on changes in local economic conditions. In addition, regulatory agencies, as an integral part of their examination process, periodically review the Company’s allowance for loan losses. Such agencies may require the Company to recognize additions to the allowance based on their judgments about information available to them at the time of their examination. Because of these factors, it is reasonably possible that the allowance for loan losses may change materially in the near term. However, the amount of the change that is reasonably possible cannot be estimated. Other estimates that are susceptible to significant change in the near term relate to the allowance for off-balance sheet credit losses, the fair value of stock-based compensation awards, the determination of other-than-temporary impairments of securities, and the fair value of financial instruments. Investment Securities The Company’s investments in securities are accounted for in accordance with applicable guidance contained in the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”), which requires the classification of securities into one of the following categories: • Securities to be held to maturity (“HTM”): bonds, notes, and debentures for which the Company has the positive intent and ability to hold to maturity are reported at cost, adjusted for premiums and discounts that are recognized in interest income using the interest method over the period to maturity. • Securities available for sale (“AFS”): available for sale securities consist of bonds, notes, and debentures that are available to meet the Company’s operating needs. These securities are reported at fair value. Unrealized holding gains and losses, net of tax, on available for sale securities are reported as a net amount in other comprehensive income. Purchase premiums and discounts are recognized in interest income using the interest method over the terms of the securities. Realized gains and losses on the sale of debt and equity securities are determined using the specific-identification method and average price method, respectively. The Company follows FASB guidance related to the recognition and presentation of other-than-temporary impairment. The guidance specifies that if an entity does not have the intent to sell a debt security prior to recovery, the security would not be considered other-than-temporarily impaired unless there is a credit loss. When an entity does not intend to sell the security, and it is more likely than not that the entity will not have to sell the security before recovery of its cost basis, it will recognize the credit component of an other-than-temporary impairment of a debt security in earnings and the remaining portion in other comprehensive income. Equity Securities The Company is a member of the Federal Home Loan Bank (“FHLB”) system. Members of the FHLB are required to own a certain amount of stock based on the level of borrowings and other factors, and may invest in additional amounts. FHLB stock is carried at cost, is restricted as to redemption, and is periodically evaluated for impairment based on ultimate recovery of par value. Both cash and stock dividends are reported as income. Equity securities also include investments in our other correspondent banks including Independent Bankers Financial Corporation (“IBFC”) and First National Bankers Bank (“FNBB”) stock. These investments are carried at cost which approximates fair value. The balance of equity securities in our correspondent banks at December 31, 2018 and 2017 was $11.9 million and $9.8 million , respectively. In addition, at December 31, 2018, equity securities include securities previously held as available for sale securities prior to January 1, 2018. See Impact of New Accounting Pronouncements below for more details. These securities are marketable securities in corporate stocks and totaled $1.7 million at December 31, 2018 . Loans The Company’s loan portfolio categories include real estate, commercial and consumer loans. Real estate loans are further categorized into construction and development, one-to-four family residential, multifamily, farmland and commercial real estate loans. The consumer loan category includes loans originated through indirect lending. Indirect lending, which is lending initiated through third-party business partners, is largely comprised of loans made through automotive dealerships. Loans that management has the intent and ability to hold for the foreseeable future or until maturity or pay-off are stated at the unpaid principal balance outstanding, net of purchase premiums or discounts, deferred income (net of costs), any direct principal charge-offs, and an allowance for loan losses. Interest on loans is calculated by using the effective interest rate on daily balances of the principal amount outstanding. Loan origination fees, net of direct loan origination costs, and commitment fees, are deferred and amortized as an adjustment to yield over the life of the loan, or over the commitment period, as applicable. Loans are considered past due if the required principal and interest payments have not been received as of the date such payments were due. Loans are ordinarily placed on nonaccrual when a loan is specifically determined to be impaired or when principal or interest is delinquent for 90 days or more; however, management may elect to continue the accrual when the estimated net realizable value of collateral is sufficient to cover the principal balance and the accrued interest. Any unpaid interest previously accrued on nonaccrual loans is reversed from income. Interest income, generally, is not recognized on specific impaired loans unless the likelihood of further loss is remote. Interest payments received on such loans are applied as a reduction of the loan principal balance. Interest income on other nonaccrual loans is recognized only to the extent of interest payments received. A loan may be returned to accrual status when all the principal and interest amounts contractually due are brought current and future principal and interest amounts contractually due are reasonably assured, which is typically evidenced by a sustained period of repayment performance by the borrower. The Company considers a loan to be impaired when, based upon current information and events, it believes it is probable that the Company will be unable to collect all amounts due according to the contractual terms of the loan agreement. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. The Company’s impaired loans include troubled debt restructurings and performing and non-performing loans for which full payment of principal or interest is not expected. Large groups of smaller balance homogenous loans are collectively evaluated for impairment. The Company calculates an allowance required for impaired loans based on the present value of expected future cash flows discounted at the loan’s effective interest rate, the loan’s observable market price or the fair value of its collateral. If the recorded investment in the impaired loan exceeds the measure of fair value, a valuation allowance is required as a component of the allowance for loan losses. Changes to the valuation allowance are recorded as a component of the provision for loan losses. The Company follows the FASB accounting guidance on sales of financial assets, which includes participating interests in loans. For loan participations that are structured in accordance with this guidance, the sold portions are recorded as a reduction of the loan portfolio. Loan participations that do not meet the criteria are accounted for as secured borrowings. See Acquisition Accounting and Acquired Impaired Loans below for accounting treatment of loans acquired through business acquisitions. Loans Held for Sale Loans originated and intended for sale in the secondary market are carried at the lower of cost or fair value. For loans carried at the lower of cost or fair value, gains and losses on loan sales (sales proceeds minus carrying value) are recorded in noninterest income, and direct loan origination costs and fees are deferred at origination of the loan and are recognized in noninterest income upon sale of the loan. At December 31, 2018 and 2017 , the Company did not have any loans held for sale. Allowance for Loan Losses The adequacy of the allowance for loan losses is determined in accordance with U.S. GAAP. The allowance for loan losses is estimated through a provision for loan losses charged to earnings. Loan losses are charged against the allowance when management believes the loan balance is uncollectable. Subsequent recoveries, if any, are credited to the allowance. The allowance is an amount that management believes will be adequate to absorb probable losses inherent in the loan portfolio as of the balance sheet date based on evaluations of the collectability of loans and prior loan loss experience. The evaluations take into consideration such factors as changes in the nature and volume of the loan portfolio, overall portfolio quality, review of specific problem loans, and current economic conditions that may affect the borrower’s ability to pay. This evaluation is inherently subjective as it requires estimates that are susceptible to significant revision as more information becomes available. Allowances for impaired loans are generally determined based on collateral values or the present value of estimated cash flows. Credits deemed uncollectible are charged to the allowance. Provisions for loan losses and recoveries on loans previously charged off are adjusted to the allowance. Past due status is determined based on contractual terms. The allowance consists of allocated and general components. The allocated component relates to loans that are classified as impaired. For loans that are classified as impaired, an allowance is established when the discounted cash flows (or collateral value or observable market price) of the impaired loan is lower than the carrying value of that loan. The general component covers non-classified loans and is based on historical loss experience adjusted for qualitative factors. Based on management’s review and observations made through qualitative review, management may apply qualitative adjustments to determine loss estimates at a group and/or portfolio segment level as deemed appropriate. Management has an established methodology to determine the adequacy of the allowance for loan losses that assesses the risks and losses inherent in its portfolio and portfolio segments. The Company utilizes an internally developed model that requires judgment to determine the estimation method that fits the credit risk characteristics of the loans in its portfolio and portfolio segments. Qualitative and environmental factors that may not be directly reflected in quantitative estimates include: asset quality trends, changes in loan concentrations, new products and process changes, changes and pressures from competition, changes in lending policies and underwriting practices, trends in the nature and volume of the loan portfolio, changes in experience and depth of lending staff and management and national and regional economic trends. The Company also considers third party or comparable company loss data. Changes in these factors are considered in determining changes in the allowance for loan losses. The impact of these factors on the Company’s qualitative assessment of the allowance for loan losses can change from period to period based on management’s assessment of the extent to which these factors are already reflected in historic loss rates. The uncertainty inherent in the estimation process is also considered in evaluating the allowance for loan losses. In the ordinary course of business, the Bank enters into commitments to extend credit and standby letters of credit. Such financial instruments are recorded in the financial statements when they become payable. The credit risk associated with these commitments is evaluated in a manner similar to the allowance for loan losses. The reserve for unfunded lending commitments is included in other liabilities in the balance sheet. At December 31, 2018 and 2017 the reserve for unfunded loan commitments was $66,000 and $32,000 , respectively. Troubled Debt Restructurings The Company periodically grants concessions to its customers in an attempt to protect as much of its investment as possible and minimize the risk of loss. These concessions may include restructuring the terms of a customer loan, thereby adjusting the customer’s payment requirements. In accordance with the FASB’s Accounting Standards Update (“ASU”) 2011-2, Receivables (Topic 310): A Creditor’s Determination of Whether a Restructuring is a Troubled Debt Restructuring , in order to be considered a troubled debt restructuring (a “TDR”), the Company must conclude that the restructuring constitutes a concession and the customer is experiencing financial difficulties. The Company defines a concession to a customer as a modification of existing loan terms for economic or legal reasons that it would otherwise not consider. Concessions are typically granted through an agreement with the customer or are imposed by a court of law. Concessions include modifying original loan terms to reduce or defer cash payments required as part of the loan agreement, including but not limited to a reduction of the stated interest rate for the remaining original life of the debt, an extension of the maturity date or dates at a stated interest rate lower than the current market rate for new debt with similar risk characteristics, a reduction of the face amount or maturity amount of the debt, or a reduction of accrued interest receivable on a debt. In its determination of whether the customer is experiencing financial difficulties, the Company considers numerous indicators, including but not limited to, whether the customer has declared or is in the process of declaring bankruptcy, whether there is substantial doubt about the customer’s ability to continue as a going concern, whether the Company believes the customer’s future cash flows will be insufficient to service the debt in accordance with the contractual terms of the existing agreement for the foreseeable future, and whether without modification the customer cannot obtain sufficient funds from other sources at an effective interest rate equal to the current market rate for similar debt for a non-troubled debtor. If the Company concludes that both a concession has been granted and the concession was granted to a customer experiencing financial difficulties, the Company identifies the loan as a TDR. For purposes of the determination of an allowance for loan losses on these TDRs, the loan is reviewed for specific impairment in accordance with the Company’s allowance for loan loss methodology. If it is determined that losses are probable on such TDRs, either because of delinquency or other credit quality indicators, the Company establishes specific reserves for these loans. Servicing Rights Primary servicing rights represent the Company’s right to service consumer automobile loans for third-party whole-loan sales and loans sold as participations. Primary servicing involves the collection of payments from individual borrowers and the distribution of these payments to the investors. The Company capitalizes the value expected to be realized from performing specified automobile servicing activities for others as automobile servicing rights (“ASRs”) when the expected future cash flows from servicing are projected to be more than adequate compensation for such activities. These capitalized servicing rights are purchased or retained upon sale of consumer automobile loans. The Company measures all consumer automobile servicing assets and liabilities at fair value. The Company defines servicing rights based on both the availability of market inputs and the manner in which the Company manages the risks of servicing assets and liabilities. The Company leverages all available relevant market data to determine the fair value of recognized servicing assets and liabilities. The Company calculates the fair value of ASRs using various assumptions including future cash flows, market discount rates, expected prepayments, servicing costs and other factors. A significant change in prepayments of loans in the servicing portfolio could result in significant changes in the valuation adjustments, thus creating potential volatility in the carrying amount of ASRs. For the year ended December 31, 2016 , expected future cash flows from ASRs approximated adequate compensation for such activities. Accordingly, the Company has not recorded an asset or liability. There were no loan sales for which servicing rights were retained by the Company during the years ended December 31, 2018 and 2017. Total income earned from servicing activities was approximately $0.6 million for the year ended December 31, 2018 , and $1.0 million and $1.6 million for the years ended December 31, 2017 , and 2016 , respectively. Other Real Estate Owned Real estate acquired through, or in lieu of, foreclosure, or other real estate owned on the consolidated balance sheets, is initially recorded at fair value at the time of foreclosure, less estimated selling cost, and any related write down is charged to the allowance for loan losses. Valuations are periodically performed by management and provisions for estimated losses on other real estate owned are charged to expense when fair value is determined to be less than the carrying value. Costs relative to the development and improvement of properties are capitalized to the extent realizable, whereas ordinary upkeep disbursements are charged to expense. The ability of the Company to recover the carrying value of real estate is based upon future sales of the other real estate owned. The ability to affect such sales is subject to market conditions and other factors, many of which are beyond the Company’s control. Operating income and expense of such properties is included in other operating income or expense, respectively, on the accompanying consolidated statements of income. Gain or loss on the disposition of such properties is included in noninterest income on the consolidated statements of income. Bank Premises and Equipment Land is carried at cost. Buildings and equipment are stated at cost, less accumulated depreciation. Depreciation expense is computed by the straight-line method and is charged to expense over the estimated useful lives of the assets, which range from 1 to 39 years. Costs of major additions and improvements are capitalized. Expenditures for maintenance and repairs are expensed as incurred. Gains or losses on the disposition of land, buildings, and equipment are included in noninterest income on the consolidated statements of income. Bank Owned Life Insurance The Company invests in bank owned life insurance (“BOLI”) policies that provide earnings to help cover the cost of employee benefit plans. The Company is the owner and beneficiary of the life insurance policies it purchased directly on a chosen group of employees. The policies are carried on the Company’s consolidated balance sheet at their cash surrender value and are subject to regulatory capital requirements. The determination of the cash surrender value includes a full evaluation of the contractual terms of each policy and assumes the surrender of policies on an individual-life by individual-life basis. Additionally, the Company periodically reviews the creditworthiness of the insurance companies that have underwritten the policies. Earnings accruing to the Company are derived from the general account investments of the insurance companies. Increases in the net cash surrender value of BOLI policies and insurance proceeds received are not taxable and are recorded in noninterest income in the consolidated statements of income. Goodwill and Other Intangible Assets Goodwill represents the excess of the purchase price over the fair value of the net identifiable assets acquired in a business combination. Goodwill and other intangible assets deemed to have an indefinite useful life are not amortized but instead are subject to review for impairment annually, or more frequently if deemed necessary, in accordance with the provisions of FASB ASC Topic 350, Intangibles – Goodwill and Other . Intangible assets with estimable useful lives are amortized over their respective estimated useful lives and reviewed for impairment in accordance with FASB ASC Topic 360, Property, Plant, and Equipment. If impaired, the asset is written down to its estimated fair value. No impairment charges have been recognized through December 31, 2018 . Core deposit intangibles representing the value of the acquired core deposit base are generally recorded in connection with business combinations involving banks and branch locations. The Company’s policy is to amortize core deposit intangibles over the estimated useful life of the deposit base. The remaining useful lives of core deposit intangibles are evaluated periodically to determine whether events and circumstances warrant revision of the remaining period of amortization. The Company’s core deposit intangibles are currently amortized using the sum-of-the-years-digits basis over 10 to 15 years. See Note 7, Goodwill and Other Intangible Assets, for additional information. Repurchase Agreements Securities sold under agreements to repurchase are secured borrowings treated as financing activities and are carried at the amounts at which the securities will be subsequently reacquired as specified in the respective agreements. Stock-Based Compensation The Company accounts for stock-based compensation under the provisions of ASC Topic 718, Compensation - Stock Compensation . Under this accounting guidance, fair value is established as the measurement objective in accounting for share-based payment awards and requires the application of a fair value based measurement method in accounting for compensation costs, which is recognized over the requisite service period. The impact of forfeitures of share-based payment awards on compensation expense is recognized as forfeitures occur. See Note 14, Stock-Based Compensation, for further disclosures regarding stock-based compensation. Off-Balance Sheet Credit-Related Financial Instruments The Company accounts for its guarantees in accordance with the provisions of ASC Topic 460, Guarantees . In the ordinary course of business, the Company has entered into commitments to extend credit, including commitments under credit card agreements, commercial letters of credit and standby letters of credit. Such financial instruments are recorded when they are funded. Derivative Financial Instruments ASC Topic 815, Derivatives and Hedging , requires that all derivatives be recognized as assets or liabilities in the balance sheet at fair value. Derivatives executed with the same counterparty are generally subject to master netting arrangements, however, fair value amounts recognized for derivative financial instruments and fair value amounts recognized for the right/obligation to reclaim/return cash collateral are not offset for financial reporting purposes. In the course of its business operations, the Company is exposed to certain risks, including interest rate, liquidity and credit risk. The Company manages its risks through the use of derivative financial instruments, primarily through management of exposure due to the receipt or payment of future cash amounts based on interest rates. The Company’s derivative financial instruments manage the differences in the timing, amount and duration of expected cash receipts and payments. Derivatives which are designated and qualify as a hedge of the exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges. The effective portion of the derivative’s gain or loss is initially reported as a component of other comprehensive income and subsequently reclassified into earnings when the forecasted transaction affects earnings or when the hedge is terminated. The ineffective portion of the gain or loss is reported in earnings immediately. In applying hedge accounting for derivatives, the Company establishes a method for assessing the effectiveness of the hedging derivative and a measurement approach for determining the ineffective aspect of the hedge upon the inception of the hedge. These methods are consistent with the Company’s approach to managing risk. Note 12, Derivative Financial Instruments, describes the derivative instruments currently used by the Company and discloses how these derivatives impact the Company’s financial position and results of operations. Income Taxes The provision for income taxes is based on amounts reported in the consolidated statements of income after exclusion of nontaxable income such as interest on state and municipal securities. Also, certain items of income and expenses are recognized in different time periods for financial statement purposes than for income tax purposes. Thus, provisions for deferred taxes are recorded in recognition of such temporary differences. Deferred taxes are determined utilizing a liability method whereby deferred tax assets are recognized for deductible temporary differences and deferred tax liabilities are recognized for taxable temporary differences. Temporary differences are the differences between the reported amounts of assets and liabilities and their tax bases. Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not that some portion or all of the deferred tax assets will not be realized. Deferred tax assets and liabilities are adjusted for the effects of changes in tax laws and rates on the date of enactment. The Company has adopted accounting guidance related to accounting for uncertainty in income taxes, which sets out a consistent framework to determine the appropriate level of tax reserves to maintain for uncertain tax positions. The Company recognizes interest and penalties on income taxes as a component of income tax expense. Revenue Recognition The Company recognizes revenue in the consolidated statements of income as it is earned and when collectability is reasonably assured. The primary source of revenue is interest income from interest-earning assets, which is recognized on the accrual basis of accounting using the effective interest method. The recognition of revenues from interest-earning assets is based upon formulas from underlying loan agreements, securities contracts, or other similar contracts. Noninterest income is recognized on the accrual basis of accounting as services are provided or as transactions occur. Noninterest income includes fees from deposit accounts, merchant services, ATM and debit card fees, servicing fees, and other miscellaneous services and transactions. Earnings Per Share Basic earnings per share is calculated using the two-class method. The two-class method is an earnings allocation formula that determines earnings per share separately for common stock and participating securities according to dividends declared and participation rights in undistributed earnings. Under this method, all earnings distributed and undistributed, are allocated to participating securities and common shares based on their respective rights to receive dividends. Unvested share-based payment awards that contain nonforfeitable rights to dividends are considered participating securities (i.e. unvested time-vested restricted stock), not subject to performance based measures. Basic earnings per share is calculated by dividing net income available to common shareholders by the weighted-average number of common shares outstanding during the period. Diluted earnings per share is calculated in a manner similar to that of basic earnings per share except that the weighted average number of common shares outstanding is increased to include the number of additional common shares that would have been outstanding if all potentially dilutive common shares (such as those resulting from the exercise of stock options and warrants) were issued during the period, computed using the treasury stock method. Statements of Cash Flows For purposes of the statements of cash flows, cash and cash equivalents include cash and amounts due from banks and federal funds sold due to the short-term nature of these items. Comprehensive Income Comprehensive income includes net income and other comprehensive income or loss, which in the case of the Company includes unrealized gains and losses on securities and changes in the fair value of interest rate swaps, net of related income taxes. Acquisition Accounting Acquisitions are accounted for under the purchase method of accounting. Purchased assets and assumed liabilities are recorded at their respective acquisition date fair values, and identifiable intangible assets are recorded at fair value. If the consideration given exceeds the fair value of the net assets received, goodwill is recognized. If the fair value of the net assets received exceeds the consideration given, a bargain purchase gain is recognized. Fair values are subject to refinement for up to one year after the closing date of an acquisition as information relative to closing date fair values becomes available. Purchased loans acquired in a business combination are recorded at their estimated fair value as of the acquisition date. The fair value of loans acquired is determined using a discounted cash flow model based on assumptions regarding the amount and timing of principal and interest prepayments, estimated payments, estimated default rates, estimated loss severity in the event of defaults, and current market rates. The fair value adjustment for performing acquired loans is amortized over the life of the loan using the effective intere

BUSINESS COMBINATIONS

BUSINESS COMBINATIONS	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
BUSINESS COMBINATIONS	BUSINESS COMBINATIONS Citizens Bancshares, Inc. On July 1, 2017 , the Company completed the acquisition of Citizens Bancshares, Inc. (“Citizens”) and its wholly-owned subsidiary, Citizens Bank, located in Evangeline Parish, Louisiana. The Company acquired 100% of Citizens’ outstanding common shares for an aggregate amount of cash consideration equal to $45.8 million , or approximately $419.20 per share. The acquisition of Citizens expanded the Company’s branch footprint in Louisiana and increased the core deposit base to help position the Company to continue to grow. There were certain adjustments to the initial calculation of goodwill during the open measurement period in 2018 which were not material. As consideration paid was in excess of the net fair value of acquired assets, the Company recorded $9.1 million of goodwill. The table below shows the allocation of the consideration paid for Citizens’ common equity to the acquired identifiable assets and liabilities assumed and the goodwill generated from the transaction (dollars in thousands). Purchase price: Cash paid $ 45,800 Fair value of assets acquired: Cash and cash equivalents 44,565 Investment securities 69,912 Loans 129,181 Bank premises and equipment 3,307 Core deposit intangible asset 1,462 Other assets 2,223 Total assets acquired 250,650 Fair value of liabilities acquired: Deposits 212,228 Other liabilities 1,675 Total liabilities assumed 213,903 Fair value of net assets acquired 36,747 Goodwill $ 9,053 The table below presents information about the loans acquired with deteriorated credit quality from Citizens as of the date of acquisition (dollars in thousands). Purchase Credit Impaired Contractually required principal $ 5,123 Non-accretable difference (700 ) Cash flows expected to be collected 4,423 Accretable yield — Fair value of acquired loans $ 4,423 BOJ Bancshares, Inc. On December 1, 2017 , the Company completed the acquisition of BOJ Bancshares, Inc. (“BOJ”) and its wholly-owned subsidiary, The Highlands Bank, located in East Feliciana Parish, Louisiana. The Company acquired 100% of BOJ’s outstanding common shares for an aggregate merger consideration consisting of $3.95 million in cash, and an aggregate of 799,559 shares of Investar common stock, for a total of approximately $22.7 million . As with the Citizens acquisition, the acquisition of BOJ expanded the Company’s branch footprint in Louisiana, allowing us to serve more customers in our surrounding market areas. After fair value adjustments, including total adjustments of $ (0.3) million to loans, bank premises and equipment, other assets, and deposits recorded during the open measurement period in 2018, the acquisition added $152.1 million in total assets, $102.4 million in loans, and $125.8 million in deposits. As consideration paid was in excess of the net fair value of acquired assets, the Company recorded $5.7 million of goodwill. The table below shows the allocation of the consideration paid for BOJ’s common equity to the acquired identifiable assets and liabilities assumed and the goodwill generated from the transaction (dollars in thousands). Purchase price: Cash paid $ 3,950 Common stock 18,749 Fair value of assets acquired: Cash and cash equivalents 26,438 Investment securities 16,194 Loans 102,393 Bank premises and equipment 3,725 Core deposit intangible asset 1,018 Other assets 2,375 Total assets acquired 152,143 Fair value of liabilities acquired: Deposits 125,788 FHLB advances 5,956 Trust preferred 2,178 Other liabilities 1,209 Total liabilities assumed 135,131 Fair value of net assets acquired 17,012 Goodwill $ 5,687 The table below presents information about the loans acquired as of the date of acquisition (dollars in thousands). Purchase Credit Impaired Contractually required principal $ 4,557 Non-accretable difference (671 ) Cash flows expected to be collected 3,886 Accretable yield — Fair value of acquired loans $ 3,886 Supplemental Unaudited Pro Forma Information The following unaudited supplemental pro forma information is presented to show estimated results assuming Citizens and BOJ were acquired as of January 1, 2016. These unaudited pro forma results are not necessarily indicative of the operating results that the Company would have achieved had it completed the acquisitions as of January 1, 2016 and should not be considered representative of future operating results. The pro forma net income for the year ended December 31, 2017 excludes the tax-affected amount of $2.2 million of acquisition expenses recorded in noninterest expense by the Company, Citizens, and BOJ. Unaudited Pro Forma Information for the years ended December 31, (dollars in thousands) 2017 2016 Interest income $ 64,222 $ 58,996 Noninterest income 5,248 7,392 Net income 10,641 11,979 In the year ended December 31, 2018 , the acquired companies have added approximately $13.5 million , $1.6 million , and $3.0 million to interest income, noninterest income, and net income, respectively. Acquisition Expense Acquisition related costs of $1.4 million and $1.9 million are included in acquisition expenses in the accompanying consolidated statements of income for the years ended December 31, 2018 and 2017, respectively. These costs include system conversion and integrating operations charges as well as legal and consulting expenses related to the acquisitions of Citizens and BOJ and legal and consulting expenses related to the acquisition of Mainland Bank, announced in October 2018.

INVESTMENT SECURITIES

INVESTMENT SECURITIES	12 Months Ended
	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
INVESTMENT SECURITIES	INVESTMENT SECURITIES The amortized cost and approximate fair value of investment securities classified as AFS are summarized below as of the dates presented (dollars in thousands). December 31, 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Obligations of U.S. government agencies and corporations $ 7,946 $ 14 $ (90 ) $ 7,870 Obligations of state and political subdivisions 34,875 6 (895 ) 33,986 Corporate bonds 16,166 53 (710 ) 15,509 Residential mortgage-backed securities 136,768 336 (2,177 ) 134,927 Commercial mortgage-backed securities 57,749 108 (1,168 ) 56,689 Total $ 253,504 $ 517 $ (5,040 ) $ 248,981 December 31, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Obligations of U.S. government agencies and corporations $ 8,241 $ 8 $ (81 ) $ 8,168 Obligations of state and political subdivisions 35,572 87 (422 ) 35,237 Corporate bonds 16,428 112 (330 ) 16,210 Residential mortgage-backed securities 110,690 58 (1,270 ) 109,478 Commercial mortgage-backed securities 48,299 16 (686 ) 47,629 Equity securities 847 24 (29 ) 842 Total $ 220,077 $ 305 $ (2,818 ) $ 217,564 The amortized cost and approximate fair value balances of obligations of U.S. government agencies and corporations at December 31, 2017 reflect reclasses of small business association securities that are collateralized by commercial mortgages and backed by the U.S. government. These securities were included in the commercial mortgage-backed securities category of our investment portfolio at December 31, 2017 to conform with the presentation of balances at December 31, 2018. Proceeds from sales of investment securities AFS and gross realized gains and losses are summarized below as of the dates presented (dollars in thousands). Twelve months ended December 31, 2018 2017 2016 Proceeds from sale $ 7,021 $ 106,448 $ 15,515 Gross gains $ 35 $ 342 $ 443 Gross losses $ (21 ) $ (50 ) $ — The amortized cost and approximate fair value of investment securities classified as HTM are summarized below as of the dates presented (dollars in thousands). December 31, 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Obligations of state and political subdivisions $ 10,699 $ 2 $ (111 ) $ 10,590 Residential mortgage-backed securities 5,367 — (152 ) 5,215 Total $ 16,066 $ 2 $ (263 ) $ 15,805 December 31, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Obligations of state and political subdivisions $ 11,861 $ 9 $ (15 ) $ 11,855 Residential mortgage-backed securities 6,136 4 (48 ) 6,092 Total $ 17,997 $ 13 $ (63 ) $ 17,947 The number of AFS securities, fair value, and unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, are summarized below as of the dates presented (dollars in thousands). Less than 12 Months 12 Months or More Total December 31, 2018 Count Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Obligations of U.S. government agencies and corporations 15 $ 469 $ — $ 5,304 $ (90 ) $ 5,773 $ (90 ) Obligations of state and political subdivisions 63 13,716 (330 ) 19,270 (565 ) 32,986 (895 ) Corporate bonds 27 6,793 (225 ) 5,763 (485 ) 12,556 (710 ) Residential mortgage-backed securities 193 24,868 (245 ) 79,517 (1,932 ) 104,385 (2,177 ) Commercial mortgage-backed securities 94 5,156 (42 ) 39,560 (1,126 ) 44,716 (1,168 ) Total 392 $ 51,002 $ (842 ) $ 149,414 $ (4,198 ) $ 200,416 $ (5,040 ) Less than 12 Months 12 Months or More Total December 31, 2017 Count Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Obligations of U.S. government agencies and corporations 14 $ 5,815 $ (50 ) $ 1,505 $ (31 ) $ 7,320 $ (81 ) Obligations of state and political subdivisions 57 12,315 (77 ) 9,930 (345 ) 22,245 (422 ) Corporate bonds 20 1,116 (6 ) 6,273 (324 ) 7,389 (330 ) Residential mortgage-backed securities 159 71,893 (729 ) 28,410 (541 ) 100,303 (1,270 ) Commercial mortgage-backed securities 80 30,445 (406 ) 11,216 (280 ) 41,661 (686 ) Equity securities 1 — — 478 (29 ) 478 (29 ) Total 331 $ 121,584 $ (1,268 ) $ 57,812 $ (1,550 ) $ 179,396 $ (2,818 ) The number of HTM securities, fair value, and unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, are summarized below as of the dates presented (dollars in thousands). Less than 12 Months 12 Months or More Total December 31, 2018 Count Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Obligations of state and political subdivisions 1 $ — $ — $ 5,468 $ (111 ) $ 5,468 $ (111 ) Residential mortgage-backed securities 9 1,761 (35 ) 3,454 (117 ) 5,215 (152 ) Total 10 $ 1,761 $ (35 ) $ 8,922 $ (228 ) $ 10,683 $ (263 ) Less than 12 Months 12 Months or More Total December 31, 2017 Count Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Obligations of state and political subdivisions 1 $ 6,007 $ (15 ) $ — $ — $ 6,007 $ (15 ) Residential mortgage-backed securities 6 1,601 (3 ) 2,522 (45 ) 4,123 (48 ) Total 7 $ 7,608 $ (18 ) $ 2,522 $ (45 ) $ 10,130 $ (63 ) The unrealized losses in the Bank’s investment portfolio, caused by interest rate increases, are not credit issues. The Bank does not intend to sell the securities and it is not more likely than not that the Bank will be required to sell the investments before recovery of their amortized cost bases. The Bank does not consider these securities to be other-than-temporarily impaired at December 31, 2018 or December 31, 2017 . The amortized cost and approximate fair value of investment debt securities, by contractual maturity (including mortgage-backed securities), are shown below as of the dates presented (dollars in thousands). Actual maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Securities Available For Sale Securities Held to Maturity December 31, 2018 Amortized Cost Fair Value Amortized Cost Fair Value Due within one year $ 3,734 $ 3,730 $ 755 $ 755 Due after one year through five years 10,681 10,600 3,405 3,406 Due after five years through ten years 44,255 43,460 960 961 Due after ten years 194,834 191,191 10,946 10,683 Total debt securities $ 253,504 $ 248,981 $ 16,066 $ 15,805 Securities Available For Sale Securities Held to Maturity December 31, 2017 Amortized Cost Fair Value Amortized Cost Fair Value Due within one year $ 1,319 $ 1,319 $ 720 $ 721 Due after one year through five years 15,379 15,331 3,245 3,249 Due after five years through ten years 28,242 27,833 1,875 1,878 Due after ten years 174,290 172,239 12,157 12,099 Total debt securities $ 219,230 $ 216,722 $ 17,997 $ 17,947

LOANS AND ALLOWANCE FOR LOAN LO

LOANS AND ALLOWANCE FOR LOAN LOSSES	12 Months Ended
	Dec. 31, 2018
Receivables [Abstract]
LOANS AND ALLOWANCE FOR LOAN LOSSES	LOANS AND ALLOWANCE FOR LOAN LOSSES The Company’s loan portfolio consists of the following categories of loans as of the dates presented (dollars in thousands). December 31, 2018 2017 Construction and development $ 157,946 $ 157,667 1-4 Family 287,137 276,922 Multifamily 50,501 51,283 Farmland 21,356 23,838 Commercial real estate 627,004 537,364 Total mortgage loans on real estate 1,143,944 1,047,074 Commercial and industrial 210,924 135,392 Consumer 45,957 76,313 Total loans $ 1,400,825 $ 1,258,779 Unamortized premiums and discounts on loans, included in the total loans balances above, were $1.4 million and $2.6 million at December 31, 2018 and 2017 , respectively and unearned income on loans was $0.5 million and $0.2 million at December 31, 2018 and 2017 , respectively. Nonaccrual and Past Due Loans Loans are considered past due if the required principal and interest payments have not been received as of the date such payments were due. Loans are placed on nonaccrual status when, in management’s opinion, the borrower may be unable to meet payment obligations as they become due, as well as when required by regulatory provisions. In determining whether or not a borrower may be unable to meet payment obligations for each class of loans, we consider the borrower’s debt service capacity through the analysis of current financial information, if available, and/or current information with regard to our collateral position. Regulatory provisions would typically require the placement of a loan on nonaccrual status if (i) principal or interest has been in default for a period of 90 days or more unless the loan is both well secured and in the process of collection or (ii) full payment of principal and interest is not expected. Loans may be placed on nonaccrual status regardless of whether or not such loans are considered past due. When interest accrual is discontinued, all unpaid accrued interest is reversed. Interest income on nonaccrual loans is recognized only to the extent that cash payments are received in excess of principal due. A loan may be returned to accrual status when all the principal and interest amounts contractually due are brought current and future payment of principal and interest amounts contractually due are reasonably assured, which is typically evidenced by a sustained period (at least six months) of repayment performance by the borrower. The tables below provide an analysis of the aging of loans as of the dates presented (dollars in thousands). December 31, 2018 Accruing Current 30-59 Days Past Due 60-89 Days Past Due 90 Days or More Past Due Nonaccrual Total Past Due & Nonaccrual Acquired Impaired Loans Total Loans Construction and development $ 157,202 $ 175 $ — $ — $ 556 $ 731 $ 13 $ 157,946 1-4 Family 284,205 1,101 41 — 1,300 2,442 490 287,137 Multifamily 50,392 109 — — — 109 — 50,501 Farmland 19,092 — — — — — 2,264 21,356 Commercial real estate 624,244 66 — — 683 749 2,011 627,004 Total mortgage loans on real estate 1,135,135 1,451 41 — 2,539 4,031 4,778 1,143,944 Commercial and industrial 209,399 221 45 — 64 330 1,195 210,924 Consumer 44,493 375 51 — 994 1,420 44 45,957 Total loans $ 1,389,027 $ 2,047 $ 137 $ — $ 3,597 $ 5,781 $ 6,017 $ 1,400,825 December 31, 2017 Accruing Current 30-59 Days Past Due 60-89 Days Past Due 90 Days or More Past Due Nonaccrual Total Past Due & Nonaccrual Acquired Impaired Loans Total Loans Construction and development $ 157,123 $ 225 $ — $ — $ 34 $ 259 $ 285 $ 157,667 1-4 Family 273,321 1,396 185 56 478 2,115 1,486 276,922 Multifamily 50,271 — — — — — 1,012 51,283 Farmland 19,619 — — 58 — 58 4,161 23,838 Commercial real estate 535,014 107 89 — 67 263 2,087 537,364 Total mortgage loans on real estate 1,035,348 1,728 274 114 579 2,695 9,031 1,047,074 Commercial and industrial 133,009 977 67 — 10 1,054 1,329 135,392 Consumer 74,409 610 152 20 1,118 1,900 4 76,313 Total loans $ 1,242,766 $ 3,315 $ 493 $ 134 $ 1,707 $ 5,649 $ 10,364 $ 1,258,779 Portfolio Segment Risk Factors The following describes the risk characteristics relevant to each of the Company’s loan portfolio segments. Construction and Development. Construction and development loans are generally made for the purpose of acquisition and development of land to be improved through the construction of commercial and residential buildings. The successful repayment of these types of loans is generally dependent upon a commitment for permanent financing from the Company, or from the sale of the constructed property. These loans carry more risk than commercial or residential real estate loans due to the dynamics of construction projects, changes in interest rates, the long-term financing market, and state and local government regulations. One such risk is that loan funds are advanced upon the security of the property under construction, which is of uncertain value prior to the completion of construction. Thus, it is more difficult to evaluate accurately the total loan funds required to complete a project and to calculate related loan-to-value ratios. The Company attempts to minimize the risks associated with construction lending by limiting loan-to-value ratios as described above. In addition, as to speculative development loans, the Company generally makes such loans only to borrowers that have a positive pre-existing relationship with us. The Company manages risk by using specific underwriting policies and procedures for these types of loans and by avoiding excessive concentrations in any one business or industry. 1-4 Family. The 1-4 Family portfolio mainly consists of residential mortgage loans to consumers to finance a primary residence. The majority of these loans are secured by properties located in the Company’s market areas and carry risks associated with the creditworthiness of the borrower and changes in the value of the collateral and loan-to-value-ratios. The Company manages these risks through policies and procedures such as limiting loan-to-value ratios at origination, employing experienced underwriting personnel, requiring standards for appraisers, and not making subprime loans. Multifamily. Multifamily loans are normally made to real estate investors to support permanent financing for multifamily residential income producing properties that rely on the successful operation of the property for repayment. This management mainly involves property maintenance and collection of rents due from tenants. This type of lending carries a lower level of risk, as compared to other commercial lending. In addition, underwriting requirements for multifamily properties are stricter than for other non-owner-occupied property types. The Company manages this risk by avoiding concentrations with any particular customer. Farmland. Farmland loans are often for land improvements related to agricultural endeavors and may include construction of new specialized facilities. These loans are usually repaid through the conversion to permanent financing, or if scheduled loan amortization begins, for the long-term benefit of the borrower’s ongoing operations. Underwriting generally involves intensive analysis of the financial strength of the borrower and guarantor, liquidation value of the subject collateral, the associated unguaranteed exposure, and any available secondary sources of repayment, with the greatest emphasis given to a borrower’s capacity to meet cash flow coverage requirements as set forth by Bank policies. Commercial Real Estate. Commercial real estate loans are extensions of credit secured by owner occupied and non-owner occupied collateral. Underwriting generally involves intensive analysis of the financial strength of the borrower and guarantor, liquidation value of the subject collateral, the associated unguaranteed exposure, and any available secondary sources of repayment, with the greatest emphasis given to a borrower’s capacity to meet cash flow coverage requirements as set forth by Bank policies. Repayment is commonly derived from the successful ongoing operations of the property. General market conditions and economic activity may impact the performance of these types of loans, including fluctuations in the value of real estate, new job creation trends, and tenant vacancy rates. The Company attempts to limit risk by analyzing a borrower’s cash flow and collateral value on an ongoing basis. The Company also typically requires personal guarantees from the principal owners of the property, supported by a review of their personal financial statements, as an additional means of mitigating our risk. The Company manages risk by avoiding concentrations in any one business or industry. Commercial and Industrial. Commercial and industrial loans receive similar underwriting treatment as commercial real estate loans in that the repayment source is analyzed to determine its ability to meet cash flow coverage requirements as set forth by Bank policies. Repayment of these loans generally comes from the generation of cash flow as the result of the borrower’s business operations. Commercial lending generally involves different risks from those associated with commercial real estate lending or construction lending. Although commercial loans may be collateralized by equipment or other business assets (including real estate, if available as collateral), the repayment of these types of loans depends primarily on the creditworthiness and projected cash flow of the borrower (and any guarantors). Thus, the general business conditions of the local economy and the borrower’s ability to sell its products and services, thereby generating sufficient operating revenue to repay us under the agreed upon terms and conditions, are the chief considerations when assessing the risk of a commercial loan. The liquidation of collateral, if any, is considered a secondary source of repayment because equipment and other business assets may, among other things, be obsolete or of limited resale value. The Company actively monitors certain financial measures of the borrower, including advance rate, cash flow, collateral value and other appropriate credit factors. Consumer. Consumer loans are offered by the Company in order to provide a full range of retail financial services to its customers and include auto loans, credit cards, and other consumer installment loans. Typically, the Company evaluates the borrower’s repayment ability through a review of credit scores and an evaluation of debt to income ratios. Repayment of consumer loans depends upon key consumer economic measures and upon the borrower’s financial stability, and is more likely to be adversely affected by divorce, job loss, illness and personal hardships than repayment of other loans. A shortfall in the value of any collateral also may pose a risk of loss to the Company for these types of loans. Indirect auto loans comprised the largest component of our consumer loans, representing 67% of our total consumer loans at December 31, 2018. At December 31, 2018, the weighted average remaining term of the indirect auto loan portfolio was 2.7 years. We exited the indirect auto lending business at the end of 2015. Credit Quality Indicators Loans are categorized into risk categories based on relevant information about the ability of borrowers to service their debt, such as current financial information, historical payment experience, credit documentation, public information, and current economic trends, among other factors. The following definitions are utilized for risk ratings, which are consistent with the definitions used in supervisory guidance. Pass – Loans not meeting the criteria below are considered pass. These loans have high credit characteristics and financial strength. The borrowers at least generate profits and cash flow that are in line with peer and industry standards and have debt service coverage ratios above loan covenants and our policy guidelines. For some of these loans, a guaranty from a financially capable party mitigates characteristics of the borrower that might otherwise result in a lower grade. Special Mention – Loans classified as special mention possess some credit deficiencies that need to be corrected to avoid a greater risk of default in the future. For example, financial ratios relating to the borrower may have deteriorated. Often, a special mention categorization is temporary while certain factors are analyzed or matters addressed before the loan is re-categorized as either pass or substandard. Substandard – Loans classified as substandard are inadequately protected by the current net worth and paying capacity of the borrower or the liquidation value of any collateral. If deficiencies are not addressed, it is likely that this category of loan will result in the Bank incurring a loss. Where a borrower has been unable to adjust to industry or general economic conditions, the borrower’s loan is often categorized as substandard. Doubtful – Loans classified as doubtful have all the weaknesses inherent in those classified as substandard, with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable. Loss – Loans classified as loss are considered uncollectible and of such little value that their continuance as recorded assets is not warranted. This classification does not mean that the assets have absolutely no recovery or salvage value, but rather it is not practical or desirable to defer writing off these assets. The tables below present a summary of the Company’s loan portfolio by category and credit quality indicator as of the dates presented (dollars in thousands). December 31, 2018 Pass Special Mention Substandard Doubtful Total Construction and development $ 157,360 $ — $ 586 $ — $ 157,946 1-4 Family 285,692 69 1,303 73 287,137 Multifamily 50,501 — — — 50,501 Farmland 19,092 — 2,264 — 21,356 Commercial real estate 625,670 — 1,334 — 627,004 Total mortgage loans on real estate 1,138,315 69 5,487 73 1,143,944 Commercial and industrial 207,941 — 2,983 — 210,924 Consumer 44,798 167 992 — 45,957 Total loans $ 1,391,054 $ 236 $ 9,462 $ 73 $ 1,400,825 December 31, 2017 Pass Special Mention Substandard Doubtful Total Construction and development $ 157,385 $ — $ 282 $ — $ 157,667 1-4 Family 275,492 74 1,356 — 276,922 Multifamily 51,283 — — — 51,283 Farmland 19,611 2,773 1,454 — 23,838 Commercial real estate 536,741 — 623 — 537,364 Total mortgage loans on real estate 1,040,512 2,847 3,715 — 1,047,074 Commercial and industrial 134,522 — 870 — 135,392 Consumer 74,934 258 1,121 — 76,313 Total loans $ 1,249,968 $ 3,105 $ 5,706 $ — $ 1,258,779 The Company had no loans that were classified as loss at December 31, 2018 or 2017 . Loan participations and whole loans sold to and serviced for others are not included in the accompanying consolidated balance sheets. The balances of the participations and whole loans sold were $135.4 million and $204.2 million as of December 31, 2018 and 2017 , respectively. The unpaid principal balances of these loans were approximately $187.6 million and $237.3 million at December 31, 2018 and 2017 , respectively. In the ordinary course of business, the Company makes loans to related parties including its executive officers, principal shareholders, directors and their immediate family members, as well as to companies in which these individuals are principal owners. Loans outstanding to such related party borrowers amounted to approximately $93.0 million and $31.2 million as of December 31, 2018 and December 31, 2017 , respectively. The table below shows the aggregate principal balance of loans to such related parties for the years ended December 31, 2018 and 2017 (dollars in thousands). December 31, 2018 2017 Balance, beginning of period $ 31,153 $ 19,957 New loans/changes in relationship 79,639 24,428 Repayments/changes in relationship (17,771 ) (13,232 ) Balance, end of period $ 93,021 $ 31,153 During the year ended December 31, 2018 , a company of which a director is the principal owner purchased a $0.7 million substandard loan from the Bank for $0.7 million . The substandard loan was made to a related party of the director. The Company did not record a gain or loss on the sale of the loan because the proceeds approximated the Bank’s recorded investment. Loans Acquired with Deteriorated Credit Quality The Company accounts for certain loans acquired as acquired impaired loans under ASC 310-30 due to evidence of credit deterioration at acquisition and the probability that the Company will be unable to collect all contractually required payments. The table below shows the changes in the accretable yield on acquired impaired loans for the periods presented below (dollars in thousands). For the twelve months ended December 31, 2018 2017 Balance, beginning of period $ — $ 275 Loan disposals — (303 ) Accretion to interest income — 28 Balance, end of period $ — $ — The table below shows a summary of the activity in the allowance for loan losses for the years ended December 31, 2018 , 2017 and 2016 (dollars in thousands). December 31, 2018 2017 2016 Balance, beginning of period $ 7,891 $ 7,051 $ 6,128 Provision for loan losses 2,570 1,540 2,079 Loans charged-off (1,185 ) (765 ) (1,228 ) Recoveries 178 65 72 Balance, end of period $ 9,454 $ 7,891 $ 7,051 The following tables outline the activity in the allowance for loan losses by collateral type for the years ended December 31, 2018 , 2017 and 2016 , and show both the allowance and portfolio balances for loans individually and collectively evaluated for impairment as of December 31, 2018 , 2017 and 2016 (dollars in thousands). December 31, 2018 Construction & Development Farmland 1-4 Family Multifamily Commercial Real Estate Commercial & Industrial Consumer Total Allowance for loan losses: Beginning balance $ 945 $ 60 $ 1,287 $ 332 $ 3,599 $ 693 $ 975 $ 7,891 Charge-offs (24 ) — (167 ) — — (481 ) (513 ) (1,185 ) Recoveries 12 — 29 — — 55 82 178 Provision 105 21 316 (1 ) 583 1,374 172 2,570 Ending balance $ 1,038 $ 81 $ 1,465 $ 331 $ 4,182 $ 1,641 $ 716 $ 9,454 Ending allowance balance for loans individually evaluated for impairment $ — $ — $ — $ — $ — $ — $ 236 $ 236 Ending allowance balance for loans acquired with deteriorated credit quality — — — — — — — — Ending allowance balance for loans collectively evaluated for impairment $ 1,038 $ 81 $ 1,465 $ 331 $ 4,182 $ 1,641 $ 480 $ 9,218 Loans receivable: Balance of loans individually evaluated for impairment $ 339 $ — $ 1,177 $ — $ 761 $ 76 $ 916 $ 3,269 Balance of loans acquired with deteriorated credit quality 13 2,264 490 — 2,011 1,195 44 6,017 Balance of loans collectively evaluated for impairment 157,594 19,092 285,470 50,501 624,232 209,653 44,997 1,391,539 Total period-end balance $ 157,946 $ 21,356 $ 287,137 $ 50,501 $ 627,004 $ 210,924 $ 45,957 $ 1,400,825 December 31, 2017 Construction & Development Farmland 1-4 Family Multifamily Commercial Real Estate Commercial & Industrial Consumer Total Allowance for loan losses: Beginning balance $ 579 $ 60 $ 1,377 $ 355 $ 2,499 $ 759 $ 1,422 $ 7,051 Charge-offs — — — — — (270 ) (495 ) (765 ) Recoveries 34 — 7 — — — 24 65 Provision 332 — (97 ) (23 ) 1,100 204 24 1,540 Ending balance $ 945 $ 60 $ 1,287 $ 332 $ 3,599 $ 693 $ 975 $ 7,891 Ending allowance balance for loans individually evaluated for impairment $ — $ — $ — $ — $ — $ — $ 304 $ 304 Ending allowance balance for loans acquired with deteriorated credit quality — — — — — — — — Ending allowance balance for loans collectively evaluated for impairment $ 945 $ 60 $ 1,287 $ 332 $ 3,599 $ 693 $ 671 $ 7,587 Loans receivable: Balance of loans individually evaluated for impairment $ 182 $ — $ 1,136 $ — $ 640 $ — $ 1,086 $ 3,044 Balance of loans acquired with deteriorated credit quality 285 4,161 1,486 1,012 2,087 1,329 4 10,364 Balance of loans collectively evaluated for impairment 157,200 19,677 274,300 50,271 534,637 134,063 75,223 1,245,371 Total period-end balance $ 157,667 $ 23,838 $ 276,922 $ 51,283 $ 537,364 $ 135,392 $ 76,313 $ 1,258,779 December 31, 2016 Construction & Development Farmland 1-4 Family Multifamily Commercial Real Estate Commercial & Industrial Consumer Total Allowance for loan losses: Beginning balance $ 644 $ 22 $ 1,213 $ 246 $ 2,156 $ 513 $ 1,334 $ 6,128 Charge-offs (27 ) — (57 ) — (526 ) — (618 ) (1,228 ) Recoveries 14 — 13 — 1 20 24 72 Provision (52 ) 38 208 109 868 226 682 2,079 Ending balance $ 579 $ 60 $ 1,377 $ 355 $ 2,499 $ 759 $ 1,422 $ 7,051 Ending allowance balance for loans individually evaluated for impairment $ — $ — $ — $ — $ — $ 136 $ 287 $ 423 Ending allowance balance for loans collectively evaluated for impairment $ 579 $ 60 $ 1,377 $ 355 $ 2,499 $ 623 $ 1,135 $ 6,628 Ending allowance balance for loans acquired with deteriorated credit quality $ — $ — $ — $ — $ — $ — $ — $ — Loans receivable: Balance of loans individually evaluated for impairment $ 645 $ — $ 1,673 $ — $ 608 $ 443 $ 1,008 $ 4,377 Balance of loans collectively evaluated for impairment 90,092 8,207 175,532 42,759 380,108 84,934 107,417 889,049 Total period-end balance $ 90,737 $ 8,207 $ 177,205 $ 42,759 $ 380,716 $ 85,377 $ 108,425 $ 893,426 Balance of loans acquired with deteriorated credit quality $ 660 $ — $ 494 $ 1,022 $ — $ — $ — $ 2,176 Impaired Loans The Company considers a loan to be impaired when, based on current information and events, the Company determines that it will not be able to collect all amounts due according to the loan agreement, including scheduled interest payments. Determination of impairment is treated the same across all classes of loans. When the Company identifies a loan as impaired, it measures the impairment based on the present value of expected future cash flows, discounted at the loan’s effective interest rate, except when the sole (remaining) source of repayment for the loans is the operation or liquidation of the collateral. In these cases when foreclosure is probable, the Company uses the current fair value of the collateral, less selling costs, instead of discounted cash flows. If the Company determines that the value of the impaired loan is less than the recorded investment in the loan (net of previous charge-offs, deferred loan fees or costs, and unamortized premium or discount), the Company recognizes impairment through an allowance estimate or a charge-off to the allowance. When the ultimate collectability of the total principal of an impaired loan is in doubt and the loan is on nonaccrual, all payments are applied to principal, under the cost recovery method. When the ultimate collectability of the total principal of an impaired loan is not in doubt and the loan is on nonaccrual, contractual interest is credited to interest income when received, under the cash basis method. The following tables contain information on the Company’s impaired loans, which include troubled debt restructurings (“TDR”), discussed in more detail below, and nonaccrual loans individually evaluated for impairment for purposes of determining the allowance for loan losses. The average balances are calculated based on the month-end balances of the loans during the period reported (dollars in thousands). As of and for the year ended December 31, 2018 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized With no related allowance recorded: Construction and development $ 339 $ 359 $ — $ 237 $ 13 1-4 Family 1,177 1,180 — 1,455 39 Commercial real estate 761 777 — 878 20 Total mortgage loans on real estate 2,277 2,316 — 2,570 72 Commercial and industrial 76 77 — 278 — Consumer 215 237 — 410 — Total 2,568 2,630 — 3,258 72 With related allowance recorded: Consumer 701 738 236 588 — Total 701 738 236 588 — Total loans: Construction and development 339 359 — 237 13 1-4 Family 1,177 1,180 — 1,455 39 Commercial real estate 761 777 — 878 20 Total mortgage loans on real estate 2,277 2,316 — 2,570 72 Commercial and industrial 76 77 — 278 — Consumer 916 975 236 998 — Total $ 3,269 $ 3,368 $ 236 $ 3,846 $ 72 As of and for the year ended December 31, 2017 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized With no related allowance recorded: Construction and development $ 182 $ 202 $ — $ 338 $ 13 1-4 Family 1,136 1,169 — 1,344 76 Commercial real estate 640 654 — 620 46 Total mortgage loans on real estate 1,958 2,025 — 2,302 135 Commercial and industrial — — — 122 — Consumer 168 217 — 380 1 Total 2,126 2,242 — 2,804 136 With related allowance recorded: Consumer 918 956 304 738 1 Total 918 956 304 738 1 Total loans: Construction and development 182 202 — 338 13 1-4 Family 1,136 1,169 — 1,344 76 Commercial real estate 640 654 — 620 46 Total mortgage loans on real estate 1,958 2,025 — 2,302 135 Commercial and industrial — — — 122 — Consumer 1,086 1,173 304 1,118 2 Total $ 3,044 $ 3,198 $ 304 $ 3,542 $ 137 As of and for the year ended December 31, 2016 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized With no related allowance recorded: Construction and development $ 645 $ 661 $ — $ 1,024 $ 90 1-4 Family 1,673 1,701 — 1,910 66 Commercial real estate 608 623 — 1,742 7 Total mortgage loans on real estate 2,926 2,985 — 4,676 163 Commercial and industrial 15 16 — 1,509 — Consumer 153 166 — 399 11 Total 3,094 3,167 — 6,584 174 With related allowance recorded: Commercial and industrial 428 430 136 144 — Consumer 855 873 287 506 6 Total 1,283 1,303 423 650 6 Total loans: Construction and development 645 661 — 1,024 90 1-4 Family 1,673 1,701 — 1,910 66 Commercial real estate 608 623 — 1,742 7 Total mortgage loans on real estate 2,926 2,985 — 4,676 163 Commercial and industrial 443 446 136 1,653 — Consumer 1,008 1,039 287 905 17 Total $ 4,377 $ 4,470 $ 423 $ 7,234 $ 180 Troubled Debt Restructurings In situations where, for economic or legal reasons related to a borrower’s financial difficulties, the Company grants a concession for other than an insignificant period of time to the borrower that the Company would not otherwise consider, the related loan is classified as a TDR. The Company strives to identify borrowers in financial difficulty early and work with them to modify their loans to more affordable terms before such loans reach nonaccrual status. These modified terms may include rate reductions, principal forgiveness, payment forbearance and other actions intended to minimize the economic loss and to avoid foreclosure or repossession of the collateral. In cases in which the Company grants the borrower new terms that provide for a reduction of either interest or principal, or otherwise include a concession, the Company identifies the loan as a TDR and measures any impairment on the restructuring as previously noted for impaired loans. Loans classified as TDRs, consisting of 24 credits, totaled approximately $2.2 million at December 31, 2018 , compared to 18 credits totaling $1.6 million at December 31, 2017 . Sixteen of the restructured loans were considered TDRs due to modification of terms through adjustments to maturity, seven of the restructured loans were considered TDRs due to a reduction in the interest rate to a rate lower than the current market rate, and one restructured loan was considered a TDR due to forgiveness of interest due on the loan. At December 31, 2018 , three of the TDRs were in default of their modified terms and are included in nonaccrual loans. At December 31, 2017 , all restructured loans were performing under their modified terms. The Company individually evaluates each TDR for allowance purposes, primarily based on collateral value, and excludes these loans from the loan population that is collectively evaluated for impairment (ASC 450). At December 31, 2018 and 2017 , there were no available balances on loans classified as TDRs that the Company was committed to lend. The table below presents the TDR pre- and post-modification outstanding recorded investments by loan categories for loans modified during the years ended December 31, 2018 and 2017 (dollars in thousands). December 31, 2018 December 31, 2017 Troubled debt restructurings Number of Contracts Pre- Modification Outstanding Recorded Investment Post- Modification Outstanding Recorded Investment Number of Contracts Pre- Modification Outstanding Recorded Investment Post- Modification Outstanding Recorded Investment Construction and development 2 $ 403 $ 403 — $ — $ — 1-4 Family 8 587 587 — — — Commercial and industrial 2 12 12 — — — Consumer — — — 1 5 5 $ 1,002 $ 1,002 $ 5 $ 5 There were three loans modified under troubled debt restructurings during the previous twelve month period that subsequently defaulted during the year ended December 31, 2018 . Of these three loans with a total recorded investment of $0.6 million , two loans, or $0.4 million , are construction and development and one loan, or $0.2 million , is 1-4 family. The following is a summary of accruing and nonaccrual TDRs and the related loan losses by portfolio type as of the dates presented (dollars in thousands). TDRs Accruing Nonaccrual Total Related Allowance December 31, 2018 Construction and development $ 239 $ 284 $ 523 $ — 1-4 Family 919 190 1,109 — Commercial real estate 78 468 546 — Commercial and industrial 12 — 12 — Total $ 1,248 $ 942 $ 2,190 $ — December 31, 2017 Construction and development $ 154 $ — $ 154 $ — 1-4 Family 889 — 889 — Commercial and industrial 573 — 573 — Consumer 5 — 5 — Total $ 1,621 $ — $ 1,621 $ — The table below includes the average recorded investment and interest income recognized for TDRs for the years ended December 31, 2018 , 2017 and 2016 (dollars in thousands). TDRs Average Recorded Investment Interest Income Recognized December 31, 2018 Construction and development $ 308 $ 13 1-4 Family 948 45 Commercial real estate 553 20 Commercial and industrial 8 — Consumer 2 — Total $ 1,819 $ 78 December 31, 2017 Construction and development $ 159 $ 13 1-4 Family 1,255 76 Commercial real estate 592 46 Consumer 2 2 Total $ 2,008 $ 137 December 31, 2016 Construction and development $ 171 $ 13 1-4 Family 1,614 66 Commercial real estate 617 7 Total $ 2,402 $ 86

OTHER REAL ESTATE OWNED

OTHER REAL ESTATE OWNED	12 Months Ended
	Dec. 31, 2018
Real Estate [Abstract]
OTHER REAL ESTATE OWNED	OTHER REAL ESTATE OWNED The table below shows the activity in other real estate owned for the periods presented (dollars in thousands). December 31, 2018 2017 Balance, beginning of period $ 3,837 $ 4,065 Additions 496 42 Acquired other real estate owned — 477 Sales of other real estate owned (155 ) (564 ) Write-downs (567 ) (183 ) Balance, end of period $ 3,611 $ 3,837 As of December 31, 2018 and December 31, 2017 , other real estate owned related to acquisitions totaled approximately $0.3 million and $0.2 million , respectively. At December 31, 2018 , approximately $0.4 million of loans secured by real estate were in the process of foreclosure.

BANK PREMISES AND EQUIPMENT

BANK PREMISES AND EQUIPMENT	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
BANK PREMISES AND EQUIPMENT	BANK PREMISES AND EQUIPMENT Bank premises and equipment consisted of the following as of the dates indicated (dollars in thousands). December 31, 2018 2017 Land $ 10,820 $ 10,476 Buildings and improvements 28,147 25,750 Furniture and equipment 8,832 7,419 Software 1,329 812 Construction-in-progress 999 908 Less: Accumulated depreciation and amortization (9,898 ) (7,825 ) Bank premises and equipment, net $ 40,229 $ 37,540 Depreciation and amortization related to bank premises and equipment charged to noninterest expense was approximately $2.6 million , $1.9 million and $1.5 million for the years ended December 31, 2018 , 2017 and 2016 , respectively.

GOODWILL AND OTHER INTANGIBLE A

GOODWILL AND OTHER INTANGIBLE ASSETS	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND OTHER INTANGIBLE ASSETS	GOODWILL AND OTHER INTANGIBLE ASSETS At December 31, 2018 , goodwill and other intangible assets totaled $19.8 million and included no accumulated impairment losses. The Company’s intangible assets consist of goodwill, core deposit intangible assets arising from acquisitions, and a trademark intangible that was acquired during the year ended December 31, 2016. The Company has determined that the core deposit intangible assets have finite lives and amortizes them over the estimated useful lives of the assets. Goodwill was recorded during the year ended December 31, 2017 as a result of the acquisitions of Citizens and BOJ, discussed in Note 2. The carrying amount of goodwill acquired from Citizens and BOJ as of December 31, 2018 was $9.1 million and $5.7 million , respectively. The trademark intangible had a carrying value of $0.1 million at December 31, 2018 and 2017 . In accordance with ASC 350, Intangibles-Goodwill and Other, the Company reviews the carrying value of indefinite-lived intangible assets at least annually, or more frequently if certain impairment indicators exist. The Company performed its annual impairment testing on October 31, 2018 and determined that there was no impairment to its goodwill or trademark intangible asset. The table below shows a summary of the core deposit intangible assets as of the dates presented (dollars in thousands). December 31, 2018 2017 Gross carrying amount $ 3,097 $ 3,097 Accumulated amortization (834 ) (357 ) Net carrying amount $ 2,263 $ 2,740 The Company acquired core deposit intangibles of $1.5 million and $1.0 million in the Citizens and BOJ acquisitions, respectively, during the year ended December 31, 2017. Core deposit intangibles are being amortized over their estimated useful lives, which range from 10 to 15 years. Amortization expense for the core deposit intangible assets recorded in depreciation and amortization totaled approximately $0.5 million , $0.2 million, and $41,000 for the years ended December 31, 2018 , 2017 and 2016 , respectively. The future amortization schedule for the Company’s core deposit intangible assets is displayed in the table below. The weighted average amortization period remaining for core deposit intangibles is 8.7 years . (dollars in thousands) 2019 $ 432 2020 387 2021 342 2022 297 2023 252 Thereafter 553 $ 2,263

DEPOSITS

DEPOSITS	12 Months Ended
	Dec. 31, 2018
Banking and Thrift [Abstract]
DEPOSITS	DEPOSITS Deposits consisted of the following as of the dates presented (dollars in thousands). December 31, 2018 2017 Noninterest-bearing demand deposits $ 217,457 $ 216,599 Interest-bearing demand deposits 295,212 208,683 Money market deposit accounts 179,340 146,140 Savings accounts 104,146 117,372 Time deposits 565,576 536,443 Total deposits $ 1,361,731 $ 1,225,237 The table below summarizes outstanding time deposits as of the dates indicated (dollars in thousands). December 31, 2018 2017 $0 to $99,999 $ 229,105 $ 252,636 $100,000 to $249,999 236,031 203,966 $250,000 and above 100,440 79,841 $ 565,576 $ 536,443 The contractual maturities of time deposits of $100,000 or more outstanding are summarized in the table below as of the dates presented (dollars in thousands). December 31, 2018 2017 Time remaining until maturity: Three months or less $ 77,923 $ 81,844 Over three through six months 72,397 55,411 Over six through twelve months 102,055 63,183 Over one year through three years 72,524 80,160 Over three years 11,572 3,209 $ 336,471 $ 283,807 The approximate scheduled maturities of time deposits for each of the next five years are shown below (dollars in thousands). 2019 $ 412,824 2020 111,891 2021 22,944 2022 9,754 2023 8,163 $ 565,576 Public fund deposits as of December 31, 2018 and 2017 totaled approximately $85.0 million and $78.3 million , respectively. The funds were secured by securities with a fair value of approximately $74.0 million and $67.5 million as of December 31, 2018 and 2017 , respectively. As of December 31, 2018 and 2017 , total deposits outstanding to executive officers, principal shareholders, directors and to companies in which they are principal owners amounted to approximately $49.4 million and $40.4 million , respectively.

SECURITIES SOLD UNDER AGREEMENT

SECURITIES SOLD UNDER AGREEMENT TO REPURCHASE	12 Months Ended
	Dec. 31, 2018
Banking and Thrift [Abstract]
SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE	SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE We utilize securities sold under agreements to repurchase (“repurchase agreements”) to facilitate the needs of our customers and to facilitate secured short-term funding needs. Repurchase agreements are stated at the amount of cash received in connection with the transaction. We monitor collateral levels on a continuous basis. We may be required to provide additional collateral based on the fair value of the underlying securities. Securities pledged as collateral under repurchase agreements are maintained with our safekeeping agents. Repurchase agreements mature on a daily basis. The balances of repurchase agreements were $2.0 million and $21.9 million at December 31, 2018 and December 31, 2017 , respectively. These funds were secured by investment securities with fair values of approximately $3.5 million and $23.3 million at December 31, 2018 and December 31, 2017 , respectively. The interest rate paid for repurchase agreements is tiered, based on balance, and is indexed to the Federal Funds Rate. The weighted average interest rate on repurchase agreements was 1.67% and 0.66% at December 31, 2018 and December 31, 2017 , respectively. The weighted-average rate paid for repurchase agreements during the year ended December 31, 2018 was 0.99% and the weighted average rate for the years ended December 31, 2017 and 2016 was 0.33% and 0.20% , respectively.

SUBORDINATED DEBT SECURITIES

SUBORDINATED DEBT SECURITIES	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
SUBORDINATED DEBT SECURITIES	SUBORDINATED DEBT SECURITIES On March 24, 2017, the Company issued and sold $18.6 million in aggregate principal amount of its 6.00% Fixed-to-Floating Rate Subordinated Notes (the “Notes”) due March 30, 2027. Beginning on March 30, 2022, the Company may redeem the Notes, in whole or in part, at their principal amount plus any accrued and unpaid interest. The Notes bear an interest rate of 6.00% per annum until March 30, 2022, on which date the interest rate will reset quarterly to an annual interest rate equal to the then-current LIBOR plus 394.5 basis points. The carrying value of subordinated debt was $18.2 million at December 31, 2018 . The subordinated debt securities are recorded net of issuance costs of $0.4 million , which are being amortized using the straight-line method over the life of the Notes. OTHER BORROWED FUNDS Federal Home Loan Bank Advances FHLB advances and weighted average interest rates at the end of the period by contractual maturity are summarized as of the dates presented (dollars in thousands). Amount Weighted Average Rate December 31, 2018 December 31, 2017 December 31, 2018 December 31, 2017 Fixed rate advances maturing: 2018 $ — $ 126,600 — % 1.42 % 2019 148,400 12,000 2.46 1.46 2020 3,100 3,100 1.52 1.52 2027 — 25,000 — 1.06 2028 25,000 — 1.77 — 2033 30,000 — 1.88 — ASC 805 Fair Value Adjustment (10 ) (42 ) — — $ 206,490 $ 166,658 2.28 % 1.37 % As of December 31, 2018 , these advances are collateralized by approximately $607.4 million of the Company’s loan portfolio and $90.1 million of the Company’s investment securities in accordance with the Advance Security and Collateral Agreement with the FHLB. As of December 31, 2018 , the Company had an additional $481.7 million available under its line of credit with the FHLB. At December 31, 2018, the FHLB advances contractually maturing in 2028 and 2033 are fixed rate, nonamortizing puttable advances. Under the terms of these advances, the Bank sells the FHLB options to terminate the fixed rate advances at specified points in time prior to the stated maturity dates. The FHLB may terminate the advances on quarterly option exercise dates until maturity. The $25.0 million advance contractually maturing in 2028 and the $30.0 million advance contractually maturing in 2033 may be terminated by the FHLB beginning in March 2019 and September 2019, respectively. Lines of Credit In addition, the Company has outstanding unsecured lines of credit with its correspondent banks available to assist in the management of short-term liquidity. Any balances drawn on these lines of credit mature daily. At December 31, 2018 , the available balance on the unsecured lines of credit totaled approximately $60.0 million , with no outstanding balance reflected on the consolidated balance sheet. Junior Subordinated Debt The following table provides a summary of the Company’s junior subordinated debentures (dollars in thousands). Face Value Carrying Value Maturity Date Variable Interest Rate Interest Rate at December 31, 2018 First Community Louisiana Statutory Trust I $ 3,609 $ 3,609 June 2036 3-month LIBOR + 1.77% 4.56 % BOJ Bancshares Statutory Trust I 3,093 2,236 December 2034 3-month LIBOR + 1.90% 4.69 % $ 6,702 $ 5,845 These debentures are unsecured obligations due to trusts that are unconsolidated subsidiaries. The debentures were issued in conjunction with the trusts’ issuances of obligated capital securities. The trusts used the proceeds from the issuances of their capital securities to buy floating rate junior subordinated deferrable interest debentures that bear the same interest rate and terms as the capital securities. These debentures are the trusts’ only assets and the interest payments from the debentures finance the distributions paid on the capital securities. These debentures rank junior and are subordinate in the right of payment to all other debt of the Company. As part of the purchase accounting adjustments made with the BOJ acquisition on December 1, 2017, the Company adjusted the carrying value of the junior subordinated debentures to fair value as of the acquisition date. The discount on the debentures will continue to be amortized through maturity and recognized as a component of interest expense. The debentures may be called by the Company at par plus any accrued interest. Interest on the debentures is calculated quarterly. The distribution rate payable on the capital securities is cumulative and payable quarterly in arrears. The Company has the right to defer payments of interest on the debentures at any time by extending the interest payment period for a period not exceeding 20 consecutive quarters with respect to each deferral period, provided that no extension period may extend beyond the redemption or maturity date of the debentures. The debentures are included on the consolidated balance sheet as liabilities; however, for regulatory purposes, the carrying value of these obligations are eligible for inclusion in Tier I regulatory capital, subject to certain limitations. All of the carrying value of $5.8 million was allowed in the calculation of Tier I regulatory capital at both December 31, 2018 and 2017 .

OTHER BORROWED FUNDS

OTHER BORROWED FUNDS	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
OTHER BORROWED FUNDS	SUBORDINATED DEBT SECURITIES On March 24, 2017, the Company issued and sold $18.6 million in aggregate principal amount of its 6.00% Fixed-to-Floating Rate Subordinated Notes (the “Notes”) due March 30, 2027. Beginning on March 30, 2022, the Company may redeem the Notes, in whole or in part, at their principal amount plus any accrued and unpaid interest. The Notes bear an interest rate of 6.00% per annum until March 30, 2022, on which date the interest rate will reset quarterly to an annual interest rate equal to the then-current LIBOR plus 394.5 basis points. The carrying value of subordinated debt was $18.2 million at December 31, 2018 . The subordinated debt securities are recorded net of issuance costs of $0.4 million , which are being amortized using the straight-line method over the life of the Notes. OTHER BORROWED FUNDS Federal Home Loan Bank Advances FHLB advances and weighted average interest rates at the end of the period by contractual maturity are summarized as of the dates presented (dollars in thousands). Amount Weighted Average Rate December 31, 2018 December 31, 2017 December 31, 2018 December 31, 2017 Fixed rate advances maturing: 2018 $ — $ 126,600 — % 1.42 % 2019 148,400 12,000 2.46 1.46 2020 3,100 3,100 1.52 1.52 2027 — 25,000 — 1.06 2028 25,000 — 1.77 — 2033 30,000 — 1.88 — ASC 805 Fair Value Adjustment (10 ) (42 ) — — $ 206,490 $ 166,658 2.28 % 1.37 % As of December 31, 2018 , these advances are collateralized by approximately $607.4 million of the Company’s loan portfolio and $90.1 million of the Company’s investment securities in accordance with the Advance Security and Collateral Agreement with the FHLB. As of December 31, 2018 , the Company had an additional $481.7 million available under its line of credit with the FHLB. At December 31, 2018, the FHLB advances contractually maturing in 2028 and 2033 are fixed rate, nonamortizing puttable advances. Under the terms of these advances, the Bank sells the FHLB options to terminate the fixed rate advances at specified points in time prior to the stated maturity dates. The FHLB may terminate the advances on quarterly option exercise dates until maturity. The $25.0 million advance contractually maturing in 2028 and the $30.0 million advance contractually maturing in 2033 may be terminated by the FHLB beginning in March 2019 and September 2019, respectively. Lines of Credit In addition, the Company has outstanding unsecured lines of credit with its correspondent banks available to assist in the management of short-term liquidity. Any balances drawn on these lines of credit mature daily. At December 31, 2018 , the available balance on the unsecured lines of credit totaled approximately $60.0 million , with no outstanding balance reflected on the consolidated balance sheet. Junior Subordinated Debt The following table provides a summary of the Company’s junior subordinated debentures (dollars in thousands). Face Value Carrying Value Maturity Date Variable Interest Rate Interest Rate at December 31, 2018 First Community Louisiana Statutory Trust I $ 3,609 $ 3,609 June 2036 3-month LIBOR + 1.77% 4.56 % BOJ Bancshares Statutory Trust I 3,093 2,236 December 2034 3-month LIBOR + 1.90% 4.69 % $ 6,702 $ 5,845 These debentures are unsecured obligations due to trusts that are unconsolidated subsidiaries. The debentures were issued in conjunction with the trusts’ issuances of obligated capital securities. The trusts used the proceeds from the issuances of their capital securities to buy floating rate junior subordinated deferrable interest debentures that bear the same interest rate and terms as the capital securities. These debentures are the trusts’ only assets and the interest payments from the debentures finance the distributions paid on the capital securities. These debentures rank junior and are subordinate in the right of payment to all other debt of the Company. As part of the purchase accounting adjustments made with the BOJ acquisition on December 1, 2017, the Company adjusted the carrying value of the junior subordinated debentures to fair value as of the acquisition date. The discount on the debentures will continue to be amortized through maturity and recognized as a component of interest expense. The debentures may be called by the Company at par plus any accrued interest. Interest on the debentures is calculated quarterly. The distribution rate payable on the capital securities is cumulative and payable quarterly in arrears. The Company has the right to defer payments of interest on the debentures at any time by extending the interest payment period for a period not exceeding 20 consecutive quarters with respect to each deferral period, provided that no extension period may extend beyond the redemption or maturity date of the debentures. The debentures are included on the consolidated balance sheet as liabilities; however, for regulatory purposes, the carrying value of these obligations are eligible for inclusion in Tier I regulatory capital, subject to certain limitations. All of the carrying value of $5.8 million was allowed in the calculation of Tier I regulatory capital at both December 31, 2018 and 2017 .

DERIVATIVE FINANCIAL INSTRUMENT

DERIVATIVE FINANCIAL INSTRUMENTS	12 Months Ended
	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVE FINANCIAL INSTRUMENTS	DERIVATIVE FINANCIAL INSTRUMENTS The Company currently holds interest rate swap contracts to manage exposure against the variability in the expected future cash flows (future interest payments) attributable to changes in the 1-month LIBOR associated with the forecasted issuances of 1-month fixed rate debt arising from a rollover strategy. The maximum length of time over which the Company is currently hedging its exposure to the variability in future cash flows for forecasted transactions is approximately 1.6 years. The total notional amount of the derivative contracts is $50.0 million . These derivative contracts are currently between the Company and a single counterparty. To mitigate credit risk, securities are pledged to the Company by the counterparty in an amount greater than or equal to the gain position of the derivative contracts. For the year ended December 31, 2018 , a gain of $0.1 million , net of a $22,000 tax expense, was recognized in “Other comprehensive (loss) income” (“OCI”) in the accompanying consolidated statements of other comprehensive income for the change in fair value of the interest rate swap contracts. For the years ended December 31, 2017 and December 31, 2016 , a gain of $0.4 million , net of a $0.1 million tax expense, and a gain of $0.4 million , net of a $0.2 million tax expense, respectively, was recognized in OCI in the accompanying consolidated statements of other comprehensive income for the change in fair value of the interest rate swap contracts. The swap contracts had a fair value of $0.6 million and $0.5 million at December 31, 2018 and 2017 , respectively, and have been recorded in “Other assets” in the accompanying consolidated balance sheets. The accumulated gain of $0.5 million included in “Accumulated other comprehensive loss” in the accompanying consolidated balance sheets would be reclassified to current earnings if the hedge transaction becomes probable of not occurring. The Company expects the hedge to remain fully effective during the remaining term of the swap contract.

STOCKHOLDERS' EQUITY

STOCKHOLDERS' EQUITY	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
STOCKHOLDERS' EQUITY	STOCKHOLDERS’ EQUITY Preferred Stock The Company’s Articles of Incorporation give the Company’s board of directors the authority to issue up to 5,000,000 shares of preferred stock. At December 31, 2018 , there were no preferred shares outstanding. The preferred shares are considered “blank check” preferred stock. This type of preferred stock allows the board of directors to fix the designations, preferences and relative, participating, optional or other special rights, and qualifications and limitations or restrictions of any series of preferred stock without further shareholder approval. Common Stock The Company’s Articles of Incorporation give the Company’s board of directors the authority to issue up to 40,000,000 shares of common stock. At December 31, 2018 , there were 9,484,219 common shares outstanding compared to 9,514,926 and 7,101,851 at December 31, 2017 and 2016, respectively. On March 22, 2017, the Company completed a common stock offering of 1.6 million shares of its common stock at a price of $21.25 per share. The common stock offering generated net proceeds of $32.5 million . On December 1, 2017, the Company issued 799,559 million shares of its common stock as consideration for the acquisition of BOJ. Total stockholders’ equity was $172.7 million at December 31, 2017 compared to $112.8 million at December 31, 2016 . Dividend Restrictions. In the ordinary course of business, the Company is dependent upon dividends from the Bank to provide funds for the payment of dividends to shareholders and to provide for other cash requirements. Banking regulations may limit the amount of dividends that may be paid. Approval by regulatory authorities is required if the effect of dividends declared would cause the regulatory capital of the Bank to fall below specified minimum levels. Approval is also required if dividends declared exceed the net profits for that year combined with the retained net profits for the preceding two years. Under the foregoing dividend restrictions and while maintaining its “well capitalized” status, at December 31, 2018, the Bank could pay aggregate dividends of up to $29.7 million to the Company without prior regulatory approval. Under the terms of the junior subordinated debentures, assumed through acquisition, the Company has the right at any time during the term of the debentures to defer the payment of interest. In the event that the Company elects to defer interest on the debentures, it may not, with certain exceptions, declare or pay any dividends or distributions on its common stock or purchase or acquire any of its common stock. These restrictions do not, and are not expected in the future to, materially limit the Company’s ability to pay dividends to its shareholders in an amount consistent with the Company’s history of paying dividends. Accumulated Other Comprehensive Income (Loss) Activity within the balances in accumulated other comprehensive income (loss), net is shown in the tables below (dollars in thousands). For the years ended December 31, 2018 2017 2016 Beginning of Period Net Change End of Period Beginning of Period Net Change End of Period Beginning of Period Net Change End of Period Unrealized gain (loss), available for sale, net $ (71 ) $ (1,576 ) $ (1,647 ) $ (401 ) $ 330 $ (71 ) $ 1,099 $ (1,500 ) $ (401 ) Reclassification of realized gain, net (1,914 ) (11 ) (1,925 ) (1,683 ) (231 ) (1,914 ) (1,396 ) (287 ) (1,683 ) Unrealized loss, transfer from available for sale to held to maturity, net 7 (2 ) 5 8 (1 ) 7 12 (4 ) 8 Change in fair value of interest rate swap designated as a cash flow hedge, net 407 84 491 5 402 407 (378 ) 383 5 Accumulated other comprehensive income (loss) $ (1,571 ) $ (1,505 ) $ (3,076 ) $ (2,071 ) $ 500 $ (1,571 ) $ (663 ) $ (1,408 ) $ (2,071 )

STOCK-BASED COMPENSATION

STOCK-BASED COMPENSATION	12 Months Ended
	Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
STOCK-BASED COMPENSATION	STOCK-BASED COMPENSATION Warrants On October 1, 2011, in connection with the acquisition of South Louisiana Bankers Bank, the Bank issued 130,875 stock warrants with an exercise price of $13.33 per share. The warrants were later exchanged for a like amount of warrants to acquire shares of Company common stock at the same exercise price. These warrants expired on July 1, 2018 and all warrants were exercised. The following table summarizes the Company’s warrant activity for the periods indicated. December 31, 2018 2017 2016 $13.33 Per Share Issued October 1, 2011, expired July 1, 2018 Balance, beginning of period 64,425 124,275 130,875 Issued — — — Forfeited — — — Exercised (64,425 ) (59,850 ) (6,600 ) Balance, end of period — 64,425 124,275 Equity Incentive Plan . The Company previously granted equity awards to its employees and non-employee directors under its 2014 Long-Term Incentive Compensation Plan (the “2014 Plan”). Effective May 24, 2017, the Company’s shareholders approved its 2017 Long-Term Incentive Compensation Plan (the “Plan”) and ceased using the 2014 Plan. The Plan authorizes the grant of various types of equity awards, such as restricted stock, stock options and stock appreciation rights to eligible participants, which include all of the Company’s employees, non-employee directors, and consultants. The Plan has reserved 600,000 shares of common stock for grant, award or issuance to eligible participants, including shares underlying granted options. The Plan is administered by the Compensation Committee of the Company’s Board of Directors, which determines, within the provisions of the Plan, those eligible employees to whom, and the times at which, grants and awards will be made. The Compensation Committee, in its discretion, may delegate its authority and duties under the Plan to specified officers; however, only the Compensation Committee may approve the terms of grants and awards to the Company’s executive officers and directors. At December 31, 2018 , approximately 507,869 shares remain available for grant. Stock Options During the years ended December 31, 2018 , 2017 and 2016 , the Company issued 31,788 , 36,177 and 46,512 stock options, respectively, to key personnel that vest in one-fifth increments on the grant date anniversary of each of the following five years. The table below summarizes the Company’s stock option activity for the periods indicated. Stock Options Shares Weighted Average Price Weighted Average Remaining Contractual Term (Years) Outstanding at December 31, 2015 278,352 $ 14.37 8.42 Issued 46,512 14.28 Forfeited — — Exercised (5,500 ) 14.00 Outstanding at December 31, 2016 319,364 14.36 7.67 Issued 36,177 20.25 Forfeited (5,334 ) 14.00 Exercised (27,290 ) 13.70 Outstanding at December 31, 2017 322,917 15.09 7.19 Issued 31,788 20.25 Forfeited (1,644 ) 14.00 Exercised (12,415 ) 14.07 Outstanding at December 31, 2018 340,646 15.98 6.49 Exercisable at December 31, 2018 162,268 14.70 6.03 At December 31, 2018 , the shares underlying total outstanding stock options had an intrinsic value of $3.0 million . The shares underlying exercisable stock options had an intrinsic value of approximately $1.6 million . The Company uses a Black-Scholes option pricing model to estimate the fair value of stock-based awards. The Black-Scholes option pricing model incorporates various subjective assumptions, including expected term and expected volatility. Stock option expense in the accompanying consolidated statements of income for the years ended December 31, 2018 , 2017 , and 2016 was $0.3 million , $0.2 million and $0.2 million , respectively. At December 31, 2018 , there was $0.6 million of unrecognized compensation cost related to stock options that is expected to be recognized over a weighted average period of 2.7 years. The table below shows the assumptions used for the stock options granted during the years ended December 31, 2018 and 2017 . 2018 2017 Dividend yield 0.52 % 0.22 % Expected volatility 24.99 % 20.46 % Risk-free interest rate 2.68 % 2.19 % Expected term (in years) 6.5 7 Weighted-average grant date fair value $ 7.16 $ 5.39 Time Vested Restricted Stock Awards. The Company has issued shares of time vested restricted stock with vesting terms ranging from two to six years. The total stock-based compensation expense for these awards is determined based on the market price of the Company’s common stock at the grant date applied to the total number of shares granted and is amortized over the vesting period. Shares of restricted stock participate in voting rights and dividends declared by the Company. No shares of restricted stock may be sold, assigned, transferred or pledged until vested. The Company issued a total of 60,260 shares of restricted stock to employees and directors for the year ended December 31, 2018 . Of the restricted stock granted in 2018 , 51,263 shares will vest over five years and 8,997 shares will vest over two years. The Company issued a total of 54,724 shares of restricted stock to employees and directors for the year ended December 31, 2017 . Of the restricted stock granted in 2017 , 48,288 shares will vest over five years and 6,436 shares will vest over two years. The Company issued a total of 54,837 shares of restricted stock to employees for the year ended December 31, 2016 . Of the restricted stock granted in 2016 , 49,139 shares will vest over five years and 5,698 shares will vest over two years. The unearned compensation related to these awards is amortized to compensation expense over the vesting period. As of December 31, 2018 , 2017 and 2016 , unearned stock-based compensation associated with these awards totaled approximately $2.1 million , $1.5 million and $1.1 million , respectively. The $2.1 million of unrecognized compensation cost related to time vested restricted stock at December 31, 2018 is expected to be recognized over a weighted average period of 3.3 years. The following table summarizes the unvested restricted stock award activity for the years ended December 31, 2018 and December 31, 2017 . December 31, 2018 2017 Shares Weighted Avg Grant Date Fair Value Shares Weighted Avg Grant Date Fair Value Balance, beginning of period 112,688 $ 17.28 93,366 $ 14.75 Granted 60,260 24.01 54,724 20.18 Forfeited (3,441 ) 20.73 (8,802 ) 15.97 Earned and issued (33,659 ) 16.75 (26,600 ) 14.78 Balance, end of period 135,848 $ 20.47 112,688 $ 17.28

EMPLOYEE BENEFIT PLANS

EMPLOYEE BENEFIT PLANS	12 Months Ended
	Dec. 31, 2018
Retirement Benefits [Abstract]
EMPLOYEE BENEFIT PLANS	EMPLOYEE BENEFIT PLANS The Company maintains a 401(k) defined contribution plan (the “401(k) Plan”) which covers employees over the age of twenty-one who have completed 90 days of credited service, as defined by the 401(k) Plan. The 401(k) Plan allows employees to defer a percentage of their salaries subject to certain limits based on federal tax laws. The Company makes matching contributions up to 4% of the employee’s annual salary (subject to certain maximum compensation amounts as prescribed in Internal Revenue Service guidance). Contributions by the Company and participants are immediately vested. The 401(k) Plan also allows for discretionary Company contributions in the form of cash or Company stock. Contributions in the form of Company stock are held in a portion of the 401(k) Plan that qualifies as an employee stock ownership plan (“ESOP”). Although no such contributions have been made as of December 31, 2018 , the discretionary components vest in increments of 20% annually over a period of five years based on the employees’ years of service. Employer matching contributions to the 401(k) Plan for the year ended December 31, 2018 were approximately $0.7 million . For the years ended December 31, 2017 and 2016 , employer matching contributions were approximately $0.5 million and $0.4 million , respectively. In 2018, the Bank entered into Salary Continuation Agreements (“SCA”) with certain of the Company’s executive officers. The SCAs represent unfunded, non-qualified deferred compensation arrangements under the Internal Revenue Code of 1986, as amended. The SCAs between the Bank and each officer provides that the officer shall receive annual payments of a fixed amount upon attaining the age of 65 , with such payments payable monthly over a period of 120 months ( 10 years ). Each officer is also entitled to certain reduced payments following a termination of employment prior to attaining age 65 (other than a termination due to death or with cause), which payments shall be made on the same schedule mentioned above. The Company maintains a deferred compensation plan for a former employee of First Community Bank (“FCB”), a bank acquired by the Company in 2013. A single premium immediate annuity policy was purchased in which the former employee is the beneficiary. Under this policy, the beneficiary will receive monthly payments of $2,000 through 2020 . The Company also maintains a deferred compensation plan for a former Citizens employee, a liability for which was assumed in the Citizens acquisition. Under the deferred compensation agreement, the former employee will receive monthly payments of $5,500 through May of 2030 . At December 31, 2018 and 2017 , the Company had a liability of $1.1 million and $0.7 million , respectively, in Accrued taxes and other liabilities on the consolidated balance sheets related to these deferred compensation plans.

INCOME TAXES

INCOME TAXES	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES On December 22, 2017, the Tax Cuts and Jobs Act (“TCJA”) was signed into law. The TCJA made broad and complex changes to the U.S. tax code that affected the Company’s income tax rate in 2017, including requiring the revaluation of the Company’s deferred tax assets and liabilities as of December 31, 2017 as a result of the lower corporate tax rates to be realized beginning January 1, 2018. The TCJA reduced the U.S. federal corporate income tax rate from 35% to 21% and established new tax laws that affected 2018. The income tax expense included in the consolidated statements of income is displayed in the table below for the years ended December 31, 2018 , 2017 and 2016 (dollars in thousands). December 31, 2018 2017 2016 Current $ 2,789 $ 4,003 $ 3,816 Deferred 841 245 (207 ) Total income tax expense $ 3,630 $ 4,248 $ 3,609 The Company’s income tax expense for each of the years ended December 31, 2018 and 2017 includes total charges of $0.3 million related to the revaluation of its deferred tax assets and liabilities as a result of the TCJA. The provision for federal income taxes differs from that computed by applying the federal statutory rate of 21% in 2018 , and 35% in 2017 and 2016 , as indicated in the following analysis for the years ended December 31, 2018 , 2017 and 2016 (dollars in thousands). December 31, 2018 2017 2016 Tax based on statutory rate $ 3,619 $ 4,258 $ 3,921 Increase (decrease) resulting from: Effect of tax-exempt income (249 ) (422 ) (273 ) Acquisition costs 29 174 — Historical tax credits 6 10 10 Effect of tax rate change 338 292 — Other (113 ) (64 ) (49 ) Total income tax expense $ 3,630 $ 4,248 $ 3,609 Effective rate 21.1 % 34.1 % 31.4 % The Company records deferred income tax on the tax effect of changes in timing differences. The net deferred tax asset was comprised of the following items as of the dates indicated (dollars in thousands). December 31, 2018 2017 2016 Deferred tax liabilities: Depreciation $ (2,515 ) $ (1,652 ) $ (1,650 ) FHLB stock dividend (79 ) (28 ) (20 ) Basis difference in acquired assets and liabilities (785 ) (900 ) (276 ) Other (20 ) (20 ) — Gross deferred tax liability (3,399 ) (2,600 ) (1,946 ) Deferred tax assets: Allowance for loan losses 1,915 1,549 2,150 Provision for other real estate losses 274 155 266 Unrealized loss on available for sale securities 818 418 1,115 Net operating loss carryforward 128 154 299 Deferred compensation 225 302 25 Basis difference in acquired assets and liabilities 442 839 253 Historical tax credit 160 144 243 Employee and director stock awards 306 208 234 Other 276 125 229 Gross deferred tax assets 4,544 3,894 4,814 Net deferred tax asset $ 1,145 $ 1,294 $ 2,868 The Company acquired net operating loss (“NOL”) carryforwards through tax free acquisitions. As of December 31, 2018 and December 31, 2017 , the Company’s NOL carryforwards were approximately $0.6 million and $0.7 million , respectively, and expire in 2033 . The Company files income tax returns under U.S. federal jurisdiction and the state of Louisiana, although the state of Louisiana does not assess an income tax on income resulting from banking operations. The Company is open to examination in the U.S. and the state of Louisiana for tax years ended December 31, 2015 through December 31, 2018.

FAIR VALUES OF FINANCIAL INSTRU

FAIR VALUES OF FINANCIAL INSTRUMENTS	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
FAIR VALUES OF FINANCIAL INSTRUMENTS	FAIR VALUES OF FINANCIAL INSTRUMENTS In accordance with FASB ASC Topic 820, Fair Value Measurement and Disclosure (“ASC 820”), disclosure of fair value information about financial instruments, whether or not recognized in the balance sheet, is required. The fair value of a financial instrument is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date under current market conditions. Fair value is best determined based upon quoted market prices. In cases where quoted market prices are not available, fair values are based on estimates using present value or other valuation techniques. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows, and the fair value estimates may not be realized in an immediate settlement of the instruments. Accordingly, the aggregate fair value amounts presented do not represent the underlying value of the Company. If there has been a significant decrease in the volume and level of activity for the asset or liability, a change in valuation technique or the use of multiple valuation techniques may be appropriate. In such instances, determining the price at which willing market participants would transact at the measurement date under current market conditions depends on the facts and circumstances and requires use of significant judgment. The fair value is a reasonable point within the range that is most representative of fair value under current market conditions. Fair Value Hierarchy In accordance with ASC 820, the Company groups its financial assets and financial liabilities measured at fair value in three levels, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. Level 1 – Valuation is based upon quoted prices for identical assets or liabilities traded in active markets. Level 2 – Valuation is based upon observable inputs other than quoted prices included in level 1, such as quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, or other inputs that are observable or can be corroborated by observable market data. Level 3 – Valuation is based upon unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. This includes certain pricing models, discounted cash flow methodologies, and similar techniques that use significant unobservable inputs. A financial instrument’s categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The following methods and assumptions were used by the Company in estimating fair value disclosures for financial instruments: Cash and Due from Banks – For these short-term instruments, fair value is the carrying value. Cash and due from banks is classified in level 1 of the fair value hierarchy. Federal Funds Sold – The fair value is the carrying value. The Company classifies these assets in level 1 of the fair value hierarchy. Investment Securities and Equity Securities – Where quoted prices are available in an active market, the Company classifies the securities within level 1 of the valuation hierarchy. Securities are defined as both long and short positions. Level 1 securities include exchange-traded equity securities. If quoted market prices are not available, the Company estimates fair values using pricing models and discounted cash flows that consider standard input factors such as observable market data, benchmark yields, interest rate volatilities, broker/dealer quotes, and credit spreads. Examples of such instruments, which would generally be classified within level 2 of the valuation hierarchy if observable inputs are available, include obligations of U.S. government agencies and corporations, obligations of state and political subdivisions, corporate bonds, residential mortgage-backed securities, commercial mortgage-backed securities, and other equity securities. In certain cases where there is limited activity or less transparency around inputs to the valuation, the Company classifies those securities in level 3. At December 31, 2018 , the majority of our level 3 investments was obligations of state and political subdivisions. The Company estimated the fair value of these level 3 investments using an option-adjusted discounted cash flow model which is based on readily traded comparable municipal credits and current spreads to the yield curves, adjusted for illiquidity of the local municipal market and sinking funds, if applicable. Loans – Effective January 1, 2018, with the adoption of ASU 2016-01, the fair value of portfolio loans, net is determined using an exit price methodology. The exit price methodology continues to be based on a discounted cash flow analysis, in which projected cash flows are based on contractual cash flows adjusted for prepayments for certain loan types (e.g. residential mortgage loans and multifamily loans) and the use of a discount rate based on expected relative risk of the cash flows. The discount rate selected considers loan type, maturity date, a liquidity premium, cost to service, and cost of capital, which is a level 3 fair value estimate. As of December 31, 2017, loans were valued as follows: For variable-rate loans that re-price frequently and with no significant change in credit risk, fair values are based on carrying values. Fair values for certain mortgage loans (for example, 1-4 family residential), credit card loans, and other consumer loans are based on quoted market prices of similar instruments sold in conjunction with securitization transactions, adjusted for differences in loan characteristics. Fair values for other loans (for example, commercial real estate and investment property mortgage loans, commercial and industrial loans) are estimated using discounted cash flow analyses, using market interest rates for comparable loans. Fair values for nonperforming loans, which are loans for which the accrual of interest has stopped or loans that are contractually 90 days past due on which interest continues to accrue, are estimated using discounted cash flow analyses or underlying collateral values, where applicable. The Company classifies loans in level 3 of the fair value hierarchy. Deposit Liabilities – The fair values disclosed for noninterest-bearing demand deposits are, by definition, equal to the amount payable on demand at the reporting date (that is, their carrying amounts). These noninterest-bearing deposits are classified in level 2 of the fair value hierarchy. All interest-bearing deposits are classified in level 3 of the fair value hierarchy. The carrying amounts of variable-rate (for example interest-bearing checking, savings, and money market accounts), fixed-term money market accounts, and certificates of deposit approximate their fair values at the reporting date. Fair values for fixed-rate certificates of deposit are estimated using a discounted cash flow calculation that applies market interest rates on comparable instruments to a schedule of aggregated expected monthly maturities on time deposits. Short-Term Borrowings— The carrying amounts of federal funds purchased, borrowings under repurchase agreements, and other short-term borrowings approximate their fair values. The Company classifies these borrowings in level 2 of the fair value hierarchy. Long-Term Borrowings – The fair values of long-term borrowings are estimated using discounted cash flows analyses based on the Company’s current incremental borrowing rates for similar types of borrowing arrangements. The fair value of the Company’s long-term debt is therefore classified in level 3 in the fair value hierarchy. Subordinated Debt Securities - The fair value of subordinated debt is estimated based on current market rates on similar debt in the market. The Company classifies this debt in level 2 of the fair value hierarchy. Derivative Instruments – The fair value for interest rate swap agreements are based upon the amounts required to settle the contracts. These derivative instruments are classified in level 2 of the fair value hierarchy. Fair Value of Assets and Liabilities Measured on a Recurring Basis Assets and liabilities measured at fair value on a recurring basis are summarized below as of the dates indicated (dollars in thousands). Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) December 31, 2018 Assets: Obligations of U.S. government agencies and corporations $ 7,870 $ — $ 7,870 $ — Obligations of state and political subdivisions 33,986 — 15,178 18,808 Corporate bonds 15,509 — 14,174 1,335 Residential mortgage-backed securities 134,927 — 134,927 — Commercial mortgage-backed securities 56,689 — 56,689 — Equity securities 1,699 1,699 — — Derivative financial instruments 622 — 622 — Total assets $ 251,302 $ 1,699 $ 229,460 $ 20,143 December 31, 2017 Assets: Obligations of U.S. government agencies and corporations $ 8,168 $ — $ 8,168 $ — Obligations of state and political subdivisions 35,237 — 15,694 19,543 Corporate bonds 16,210 — 14,885 1,325 Residential mortgage-backed securities 109,478 — 109,478 — Commercial mortgage-backed securities 47,629 — 47,629 — Equity securities 842 842 — — Derivative financial instruments 516 — 516 — Total assets $ 218,080 $ 842 $ 196,370 $ 20,868 Equity securities balances in the table above do not reflect balances of stock held in correspondent banks. The Company reviews fair value hierarchy classifications on a quarterly basis. Changes in the Company’s ability to observe inputs to the valuation may cause reclassification of certain assets or liabilities within the fair value hierarchy. The table below provides a reconciliation for assets measured at fair value on a recurring basis using significant unobservable inputs, or level 3 inputs (dollars in thousands). Obligations of State and Political Subdivisions Corporate Bonds Total Balance at December 31, 2016 $ 17,656 $ 624 $ 18,280 Realized gains (losses) included in net income — — — Unrealized gains included in other comprehensive income 1,265 1 1,266 Purchases — 700 700 Acquired 622 — 622 Sales — — — Maturities, prepayments, and calls — — — Transfers into Level 3 — — — Transfers out of Level 3 — — — Balance at December 31, 2017 $ 19,543 $ 1,325 $ 20,868 Realized gains (losses) included in net income — — — Unrealized (losses) gains included in other comprehensive income (628 ) 10 (618 ) Purchases — — — Sales — — — Maturities, prepayments, and calls (107 ) — (107 ) Transfers into Level 3 — — — Transfers out of Level 3 — — — Balance at December 31, 2018 $ 18,808 $ 1,335 $ 20,143 There were no liabilities measured at fair value on a recurring basis using level 3 inputs at December 31, 2018 , 2017 and 2016 . For the year ended December 31, 2018 and 2017 , there were no gains or losses included in earnings related to the change in fair value of the assets measured on a recurring basis using significant unobservable inputs held at the end of the period. Fair Value of Assets Measured on a Nonrecurring Basis Quantitative information about assets measured at fair value on a nonrecurring basis based on significant unobservable inputs (level 3) are summarized below as of the dates indicated; there were no liabilities measured on a nonrecurring basis at December 31, 2018 or 2017 (dollars in thousands). Estimated Fair Value Valuation Technique Unobservable Inputs Range of Discounts Weighted Average Discount December 31, 2018 Impaired loans $ 383 Discounted cash flows, Underlying collateral value Collateral discounts and estimated costs to sell 0% - 100% 15% Other real estate owned 3,270 Underlying collateral value, Third party appraisals Collateral discounts and discount rates 15% 15% December 31, 2017 Impaired loans $ 380 Discounted cash flows, Underlying collateral value Collateral discounts and estimated costs to sell 0% - 100% 32% Other real estate owned 3,612 Underlying collateral value, Third party appraisals Collateral discounts and discount rates 5% 5% The estimated fair values of the Company’s financial instruments at December 31, 2018 and December 31, 2017 are shown below (dollars in thousands). December 31, 2018 Carrying Amount Estimated Fair Value Level 1 Level 2 Level 3 Financial assets: Cash and due from banks $ 17,134 $ 17,134 $ 17,134 $ — $ — Federal funds sold 6 6 6 — — Investment securities 265,047 264,786 — 234,053 30,733 Equity securities 13,562 13,562 1,699 11,863 — Loans, net of allowance 1,391,371 1,374,292 — — 1,374,292 Derivative financial instruments 622 622 — 622 — Financial liabilities: Deposits, noninterest-bearing $ 217,457 $ 217,457 $ — $ 217,457 $ — Deposits, interest-bearing 1,144,274 1,095,639 — — 1,095,639 FHLB short-term advances and repurchase agreements 205,399 205,399 — 205,399 — FHLB long-term advances 3,090 2,712 — — 2,712 Junior subordinated debt 5,845 7,420 — — 7,420 Subordinated debt 18,600 19,187 — 19,187 — December 31, 2017 Carrying Amount Estimated Fair Value Level 1 Level 2 Level 3 Financial assets: Cash and due from banks $ 30,421 $ 30,421 $ 30,421 $ — $ — Investment securities 235,561 235,511 842 201,946 32,723 Equity securities 9,798 9,799 — 9,799 — Loans, net of allowance 1,250,888 1,249,844 — — 1,249,844 Derivative financial instruments 516 516 — 516 — Financial liabilities: Deposits, noninterest-bearing $ 216,599 $ 216,599 $ — $ 216,599 $ — Deposits, interest-bearing 1,008,638 977,127 — — 977,127 FHLB short-term advances and repurchase agreements 148,535 148,535 — 148,535 — FHLB long-term advances 40,058 39,927 — — 39,927 Junior subordinated debt 5,792 5,576 — — 5,576 Subordinated debt 18,600 18,857 — 18,857 —

REGULATORY MATTERS

REGULATORY MATTERS	12 Months Ended
	Dec. 31, 2018
Banking and Thrift [Abstract]
REGULATORY MATTERS	REGULATORY MATTERS The Bank is subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the financial statements. Under capital adequacy guidelines, the Bank must meet specific capital guidelines that involve quantitative measures of assets, liabilities, and certain off-balance sheet items as calculated under regulatory accounting practices. The capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors. Quantitative measures established by regulation to ensure capital adequacy require the Bank to maintain minimum amounts and ratios (set forth in the table below) of total and Tier 1 capital (as defined in the regulations) to risk-weighted assets (as defined) and to average assets (as defined). As of December 31, 2018 and 2017 , the Bank was considered well capitalized under the regulatory framework for prompt corrective action. To be categorized as well capitalized, the Bank must maintain minimum total risk-based, Tier 1 leverage capital ratios as set forth in the table below. There are no conditions or events since the regulatory framework for prompt corrective action was issued that management believes have changed the Bank’s category. The Company’s and the Bank’s actual capital amounts and ratios as of December 31, 2018 and December 31, 2017 are presented in the tables below (dollars in thousands). Actual Capital Adequacy Well Capitalized Amount Ratio Amount Ratio Amount Ratio December 31, 2018 Tier 1 leverage capital Investar Holding Corporation $ 172,050 9.81 % $ 70,121 4.00 % NA NA Investar Bank 187,735 10.72 70,056 4.00 87,570 5.00 Common Equity Tier 1 risk-based capital Investar Holding Corporation 165,550 11.15 66,800 4.50 NA NA Investar Bank 187,735 12.67 66,703 4.50 96,349 6.50 Tier 1 risk-based capital Investar Holding Corporation 172,050 11.59 89,066 6.00 NA NA Investar Bank 187,735 12.67 88,937 6.00 118,583 8.00 Total risk-based capital Investar Holding Corporation 199,786 13.46 118,755 8.00 NA NA Investar Bank 197,256 13.31 118,583 8.00 148,229 10.00 December 31, 2017 Tier 1 leverage capital Investar Holding Corporation $ 161,438 10.66 % $ 60,579 4.00 % NA NA Investar Bank 175,943 11.63 60,534 4.00 75,668 5.00 Common Equity Tier 1 risk-based capital Investar Holding Corporation 154,938 11.75 59,352 4.50 NA NA Investar Bank 175,943 13.35 59,294 4.50 85,647 6.50 Tier 1 risk-based capital Investar Holding Corporation 161,438 12.24 79,136 6.00 NA NA Investar Bank 175,943 13.35 79,059 6.00 105,411 8.00 Total risk-based capital Investar Holding Corporation 187,530 14.22 105,514 8.00 NA NA Investar Bank 183,867 13.95 105,411 8.00 131,764 10.00 Applicable Federal and State statutes and regulations impose restrictions on the amounts of dividends that may be declared by the Company. In addition to the formal statutes and regulations, regulatory authorities also consider the adequacy of the Company’s total capital in relation to its assets, deposits and other such items and, as a result, capital adequacy considerations could further limit the availability of dividends from the Company. In the event the Company is in default or has deferred interest payments on subordinated debentures, the Company would be restricted from paying dividends. In July 2013, the federal banking regulatory agencies issued a final rule which revises the regulatory capital framework for financial institutions. The final rule (also known as the Basel III capital rules) covers a number of aspects pertaining to capital requirements. These include: • Prompt Corrective Action Capital Category Thresholds - The following thresholds have been established for an institution to be deemed well-capitalized: Total Risk-Based Capital Ratio 10.0 % Tier 1 Risk-Based Capital Ratio 8.0 % Common Equity Tier 1 Capital Ratio 6.5 % Tier 1 Leverage Ratio 5.0 % • Establishment of a Capital Conservation Buffer - The Capital Conservation Buffer is phased in through 2019. • Changes in risk-weighting of assets. • Opt-out Election of Accumulated Other Comprehensive Income from Common Equity Tier 1 Capital. Financial institutions became subject to the final rule on January 1, 2015, and the rules were fully phased in as of January 1, 2019.

PARENT ONLY BALANCE SHEETS, STA

PARENT ONLY BALANCE SHEETS, STATEMENTS OF OPERATIONS AND STATEMENTS OF CASH FLOWS	12 Months Ended
	Dec. 31, 2018
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
PARENT ONLY BALANCE SHEETS, STATEMENTS OF OPERATIONS AND STATEMENTS OF CASH FLOWS	PARENT ONLY BALANCE SHEETS, STATEMENTS OF OPERATIONS AND STATEMENTS OF CASH FLOWS BALANCE SHEETS December 31, (dollars in thousands) 2018 2017 ASSETS Cash and due from bank $ 604 $ 2,134 Equity securities 1,232 364 Accounts receivable 26 27 Due from bank subsidiary 451 759 Investment in bank subsidiary 204,347 193,654 Investment in trust 202 202 Investment in tax credit entity 169 169 Trademark intangible 100 100 Deferred tax asset 52 — Other assets 81 24 Total assets $ 207,264 $ 197,433 LIABILITIES Subordinated debt, net of unamortized issuance costs $ 18,215 $ 18,168 Junior subordinated debt 5,845 5,792 Accounts payable 124 95 Accrued interest payable 292 290 Dividend payable 484 312 Due to bank subsidiary 42 — Deferred tax liability — 47 Total liabilities 25,002 24,704 STOCKHOLDERS’ EQUITY Common stock 9,484 9,515 Surplus 130,133 131,582 Retained earnings 45,721 33,203 Accumulated other comprehensive loss (3,076 ) (1,571 ) Total stockholders’ equity 182,262 172,729 Total liabilities and stockholders’ equity $ 207,264 $ 197,433 STATEMENTS OF OPERATIONS For the year ended For the year ended December 31, (dollars in thousands) 2018 2017 Revenue Dividends received from bank subsidiary $ 4,000 $ 50,200 Dividends on corporate stock 6 6 Gain on sale of equity securities, net — 52 Change in the fair value of equity securities (265 ) — Interest income from investment in trust 8 4 Total revenue 3,749 50,262 Expense Interest on borrowings 1,486 1,017 Management fees to bank subsidiary 335 310 Acquisition expense 39 452 Other expense 454 449 Total expense 2,314 2,228 Income before income taxes and equity in undistributed income of bank subsidiary 1,435 48,034 Equity in undistributed income (loss) of bank subsidiary 11,644 (40,606 ) Income tax benefit 527 774 Net income $ 13,606 $ 8,202 STATEMENTS OF CASH FLOWS For the year ended December 31, (dollars in thousands) 2018 2017 CASH FLOWS FROM OPERATING ACTIVITIES Net income $ 13,606 $ 8,202 Adjustments to reconcile net loss to net cash provided by operating activities: Equity in undistributed loss (earnings) of bank subsidiary (11,644 ) 40,606 Gain on sale of available for sale securities — (52 ) Change in the fair value of equity securities 265 — Amortization of debt costs and purchase accounting adjustments 100 40 Net change in: Due from bank subsidiary 307 (494 ) Other assets (13 ) 36 Deferred tax asset (99 ) (22 ) Accrued other liabilities 890 890 Net cash provided by operating activities 3,412 49,206 CASH FLOWS FROM INVESTING ACTIVITIES Capital contributed to bank subsidiary — (48,400 ) Purchases of equity securities (2,189 ) (492 ) Proceeds from the sale of equity securities 1,047 409 Cash paid for acquisitions, net of cash acquired — (49,213 ) Net cash used in investing activities (1,142 ) (97,696 ) CASH FLOWS FROM FINANCING ACTIVITIES Repayment of borrowings — (1,000 ) Cash dividends paid on common stock (1,468 ) (722 ) Proceeds from issuance of common stock in a public offering, net of issuance costs — 32,509 Payment to repurchase common stock (3,368 ) (506 ) Proceeds from stock options and warrants exercised 1,036 1,172 Proceeds from subordinated debt, net of costs — 18,133 Net cash provided by (used in) financing activities (3,800 ) 49,586 Net decrease in cash (1,530 ) 1,096 Cash and cash equivalents, beginning of period 2,134 1,038 Cash and cash equivalents, end of period $ 604 $ 2,134 SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION: Cash payments for: Interest on borrowings $ 1,484 $ 732

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Unfunded Commitments The Company is a party to financial instruments with off-balance sheet risk entered into in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit consisting of loan commitments and standby letters of credit, which are not included in the accompanying financial statements. Such financial instruments are recorded in the financial statements when they become payable. The credit risk associated with these commitments is evaluated in a manner similar to the allowance for loan losses. The reserve for unfunded lending commitments is included in other liabilities in the balance sheet. At December 31, 2018 the reserve for unfunded loan commitments was $66,000 . Commitments to extend credit are agreements to lend money with fixed expiration dates or termination clauses. The Company applies the same credit standards used in the lending process when extending these commitments, and periodically reassesses the customer’s creditworthiness through ongoing credit reviews. Since some commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. Collateral is obtained based on the Company’s assessment of the transaction. Essentially all standby letters of credit issued have expiration dates within one year. The table below shows the approximate amounts of the Company’s commitments to extend credit as of the dates presented (dollars in thousands). December 31, 2018 December 31, 2017 Loan commitments $ 263,002 $ 174,278 Standby letters of credit 11,114 3,832 Additionally, at December 31, 2018 , the Company had unfunded commitments of $0.1 million for its investment in Small Business Investment Company qualified funds. Insurance The Company is obligated for certain costs associated with its insurance program for employee health. The Company is self-insured for a substantial portion of its potential claims. The Company recognizes its obligation associated with these costs, up to specified deductible limits in the period in which a claim is incurred, including with respect to both reported claims and claims incurred but not reported. The claims costs are estimated based on historical claims experience. The reserves for insurance claims are reviewed and updated by management on a quarterly basis. Leases Commitments On December 31, 2018 , the Company entered into an operating lease of a branch facility in its New Orleans market. There was no lease expense recorded in the year ended December 31, 2018 . Future minimum lease payments due under non-cancelable operating leases at December 31, 2018 were as follows (dollars in thousands): 2019 $ 80 2020 120 2021 120 2022 120 2023 120 Thereafter 890 $ 1,450 Legal Proceedings The nature of the business of the Company’s banking and other subsidiaries ordinarily results in a certain amount of claims, litigation, investigations, and legal and administrative cases and proceedings, which are considered incidental to the normal conduct of business. Some of these claims are against entities which the Company acquired in business acquisitions. The Company has asserted defenses to these claims and, with respect to such legal proceedings, intends to continue to defend itself, litigating or settling cases according to management’s judgment as to what is in the best interest of the Company and its shareholders. The Company assesses its liabilities and contingencies in connection with outstanding legal proceedings utilizing the latest information available. Where it is probable that the Company will incur a loss and the amount of the loss can be reasonably estimated, the Company records a liability in its consolidated financial statements. These legal reserves may be increased or decreased to reflect any relevant developments on a quarterly basis. Where a loss is not probable or the amount of loss is not estimable, the Company does not accrue legal reserves. While the outcome of legal proceedings is inherently uncertain, based on information currently available and available insurance coverage, the Company’s management believes that it has established appropriate legal reserves. Any incremental liabilities arising from pending legal proceedings are not expected to have a material adverse effect on the Company’s consolidated financial position, consolidated results of operations, or consolidated cash flows. However, it is possible that the ultimate resolution of these matters, if unfavorable, may be material to the Company’s consolidated financial position, consolidated results of operations, or consolidated cash flows. As of the date of this filing, the Company believes the amount of losses associated with legal proceedings that it is reasonably possible to incur is not material. Investment in Tax Credit Entity In December 2014, the Company acquired a limited partnership interest in a tax-advantaged limited partnership whose purpose was to invest in an approved Federal Historic Rehabilitation tax credit project. This investment is accounted for using the cost method of accounting and is included in “Other assets” in the accompanying consolidated balance sheets. At December 31, 2018 and 2017 , the recorded investment was $0.2 million . The limited partnership is considered to be a variable interest entity (“VIE”). The VIE has not been consolidated because the Company is not considered the primary beneficiary. The Company’s investment in the limited partnership was evaluated for impairment at the end of the reporting period and the Company determined there was no impairment for the year ended December 31, 2018 . At December 31, 2018 and 2017 , the Company had $0.9 million invested in this partnership. The investment generated historic tax credits of $1.0 million , all of which were recognized in the year ended December 31, 2014. The Company did not make any loans related to this real estate project. Based on the structure of this transaction, the Company expects to recover its investment solely through use of the tax credits that were generated by the investment.

CONCENTRATIONS OF CREDIT

CONCENTRATIONS OF CREDIT	12 Months Ended
	Dec. 31, 2018
Risks and Uncertainties [Abstract]
CONCENTRATIONS OF CREDIT	CONCENTRATIONS OF CREDIT Substantially all of the Company’s loans and commitments have been granted to customers in the Company’s market area. The concentrations of credit by type of loan are set forth in Note 4, Loans and Allowance for Loan Losses. The distribution of commitments to extend credit approximates the distribution of loans outstanding. The Company maintains deposit accounts and federal funds sold with correspondent banks which may, periodically, exceed the federally insured amount.

TRANSACTIONS WITH RELATED PARTI

TRANSACTIONS WITH RELATED PARTIES	12 Months Ended
	Dec. 31, 2018
Related Party Transactions [Abstract]
TRANSACTIONS WITH RELATED PARTIES	TRANSACTIONS WITH RELATED PARTIES The Bank has made, and expects in the future to continue to make in the ordinary course of business, loans to directors and executive officers of the Company, the Bank, and their affiliates. In management’s opinion, these loans were made in the ordinary course of business at normal credit terms, including interest rate and collateral requirements, and do not represent more than normal credit risk. See Note 4, Loans and Allowance for Loan Losses, for more information regarding lending transactions between the Company and these related parties. During 2018 and 2017 , certain executive officers and directors of the Company and the Bank, including companies with which they are affiliated, were deposit customers of the Bank. See Note 8, Deposits, regarding total deposits outstanding to these related parties. The Company has transactions with related parties for which the Company believes the terms and conditions are comparable to terms that would have been available from a third party that was unaffiliated with the Company. The following describes transactions since January 1, 2016, in addition to the ordinary banking relationships described above, in which the Company has participated in which one or more of its directors, executive officers or other related persons had or will have a direct or indirect material interest. The Company has engaged in a number of transactions with Joffrion Commercial Division, LLC (“JCD”), a commercial construction company owned and managed by Gordon H. Joffrion, one of the Company’s directors. For each transaction, the Company selected JCD through its public bidding process. The Company paid JCD approximately $0.6 million , $0.4 million and $1.6 million during the years ended December 31, 2018, 2017 and 2016, respectively.

EARNINGS PER SHARE

EARNINGS PER SHARE	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
EARNINGS PER SHARE	EARNINGS PER SHARE The following is a summary of the information used in the computation of basic and diluted earnings per common share for the years ended December 31, 2018 , 2017 and 2016 (in thousands, except share data). December 31, 2018 2017 2016 Earnings per common share - basic Net income allocated to common shareholders $ 13,414 $ 8,092 $ 7,880 Weighted-average basic shares outstanding 9,538,891 8,399,584 7,107,187 Basic earnings per common share $ 1.41 $ 0.96 $ 1.11 Earnings per common share - diluted Net income allocated to common shareholders $ 13,417 $ 8,092 $ 7,880 Weighted-average basic shares outstanding 9,538,891 8,399,584 7,107,187 Dilutive effect of securities 125,952 57,344 42,647 Total weighted average diluted shares outstanding 9,664,843 8,456,928 7,149,834 Diluted earnings per common share $ 1.39 $ 0.96 $ 1.10 The weighted average number of shares that have an antidilutive effect in the calculation of diluted earnings per common share and have been excluded from the computations above are shown below. December 31, 2018 2017 2016 Stock options 6,306 5,235 10,069 Restricted stock 1,364 1,880 1,737

QUARTERLY RESULTS OF OPERATIONS

QUARTERLY RESULTS OF OPERATIONS (UNAUDITED)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
QUARTERLY RESULTS OF OPERATIONS (UNAUDITED)	QUARTERLY RESULTS OF OPERATIONS (UNAUDITED) (dollars in thousands, except per share data) First Quarter Second Quarter Third Quarter Fourth Quarter Year ended December 31, 2018 Total interest income $ 17,178 $ 18,009 $ 18,777 $ 19,927 Total interest expense 3,320 3,689 4,392 5,120 Net interest income 13,858 14,320 14,385 14,807 Provision for loan losses 625 567 785 593 Net interest income after provision for loan losses 13,233 13,753 13,600 14,214 Gain (loss) on sale of investment securities — 22 15 (23 ) Other noninterest income 1,072 1,171 1,202 859 Noninterest expense 10,562 10,160 10,254 10,906 Income before income taxes 3,743 4,786 4,563 4,144 Income tax expense 1,341 966 516 807 Net income $ 2,402 $ 3,820 $ 4,047 $ 3,337 Earnings per common share - basic $ 0.25 $ 0.39 $ 0.42 $ 0.35 Earnings per common share - diluted $ 0.25 $ 0.39 $ 0.41 $ 0.34 (dollars in thousands, except per share data) First Quarter Second Quarter Third Quarter Fourth Quarter Year ended December 31, 2017 Total interest income $ 11,093 $ 11,844 $ 14,442 $ 15,967 Total interest expense 2,233 2,542 2,904 3,150 Net interest income 8,860 9,302 11,538 12,817 Provision for loan losses 350 375 420 395 Net interest income after provision for loan losses 8,510 8,927 11,118 12,422 Gain on sale of investment securities 106 109 27 50 Other noninterest income 779 692 1,140 912 Noninterest expense 6,684 6,928 9,122 9,608 Income before income taxes 2,711 2,800 3,163 3,776 Income tax expense 847 877 1,032 1,492 Net income $ 1,864 $ 1,923 $ 2,131 $ 2,284 Earnings per common share - basic $ 0.26 $ 0.22 $ 0.24 $ 0.25 Earnings per common share - diluted $ 0.26 $ 0.22 $ 0.24 $ 0.25

SUBSEQUENT EVENTS

SUBSEQUENT EVENTS	12 Months Ended
	Dec. 31, 2018
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTS Effective March 1, 2019, the Company completed its previously announced acquisition of Mainland Bank (“Mainland”) in Texas City, Texas. The acquisition was completed pursuant to the terms of the Agreement and Plan of Reorganization (the “Merger Agreement”), dated October 10, 2018, by and among the Company, the Bank, and Mainland. Pursuant to the Merger Agreement, Mainland was merged with and into the Investar Bank, with Investar Bank surviving the merger. Under the terms of the Merger Agreement, all of the issued and outstanding shares of Mainland common stock were converted into the right to receive aggregate merger consideration consisting of an aggregate of 763,849 shares of the Company’s common stock. Management has evaluated all subsequent events and transactions that occurred after December 31, 2018 up through the date that the financial statements were available to be issued and determined that there were no additional events that require disclosure. No events or changes in circumstances were identified that would have an adverse impact on the financial statements.

SUMMARY OF SIGNIFICANT ACCOUN_2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Nature of Operations	Nature of Operations Investar Holding Corporation (the “Company”) is a financial holding company headquartered in Baton Rouge, Louisiana, that provides, through its wholly-owned subsidiary, Investar Bank (the “Bank”), full banking services, excluding trust services, tailored primarily to meet the needs of individuals and small to medium-sized businesses throughout its Louisiana markets of Baton Rouge, New Orleans, and Lafayette and their greater surrounding areas, and as of March 1, 2019, the greater Houston, Texas market.
Basis of Presentation	Basis of Presentation The consolidated financial statements of Investar Holding Corporation and its wholly-owned subsidiary, the Bank, have been prepared in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and to generally accepted practices within the banking industry.
Segments	Segments While our chief decision maker monitors the revenue streams of the various banking products and services, operations are managed and financial performance is evaluated on a Company-wide basis. Accordingly, all of the Company’s banking operations are considered by management to be aggregated in one reportable operating segment. Because the overall banking operations comprise substantially all of the consolidated operations, no separate segment disclosures are presented in the accompanying consolidated financial statements.
Principles of Consolidation	Principles of Consolidation The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiary, the Bank. All significant intercompany accounts and transactions have been eliminated in consolidation.
Use of Estimates	Use of Estimates The preparation of statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements as well as the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates, and such differences could be material. Material estimates that are particularly susceptible to significant change relate to the determination of the allowance for loan losses. While management uses available information to recognize losses on loans, future additions to the allowance may be necessary based on changes in local economic conditions. In addition, regulatory agencies, as an integral part of their examination process, periodically review the Company’s allowance for loan losses. Such agencies may require the Company to recognize additions to the allowance based on their judgments about information available to them at the time of their examination. Because of these factors, it is reasonably possible that the allowance for loan losses may change materially in the near term. However, the amount of the change that is reasonably possible cannot be estimated. Other estimates that are susceptible to significant change in the near term relate to the allowance for off-balance sheet credit losses, the fair value of stock-based compensation awards, the determination of other-than-temporary impairments of securities, and the fair value of financial instruments.
Investment Securities	Investment Securities The Company’s investments in securities are accounted for in accordance with applicable guidance contained in the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”), which requires the classification of securities into one of the following categories: • Securities to be held to maturity (“HTM”): bonds, notes, and debentures for which the Company has the positive intent and ability to hold to maturity are reported at cost, adjusted for premiums and discounts that are recognized in interest income using the interest method over the period to maturity. • Securities available for sale (“AFS”): available for sale securities consist of bonds, notes, and debentures that are available to meet the Company’s operating needs. These securities are reported at fair value. Unrealized holding gains and losses, net of tax, on available for sale securities are reported as a net amount in other comprehensive income. Purchase premiums and discounts are recognized in interest income using the interest method over the terms of the securities. Realized gains and losses on the sale of debt and equity securities are determined using the specific-identification method and average price method, respectively. The Company follows FASB guidance related to the recognition and presentation of other-than-temporary impairment. The guidance specifies that if an entity does not have the intent to sell a debt security prior to recovery, the security would not be considered other-than-temporarily impaired unless there is a credit loss. When an entity does not intend to sell the security, and it is more likely than not that the entity will not have to sell the security before recovery of its cost basis, it will recognize the credit component of an other-than-temporary impairment of a debt security in earnings and the remaining portion in other comprehensive income.
Equity Securities	Equity Securities The Company is a member of the Federal Home Loan Bank (“FHLB”) system. Members of the FHLB are required to own a certain amount of stock based on the level of borrowings and other factors, and may invest in additional amounts. FHLB stock is carried at cost, is restricted as to redemption, and is periodically evaluated for impairment based on ultimate recovery of par value. Both cash and stock dividends are reported as income. Equity securities also include investments in our other correspondent banks including Independent Bankers Financial Corporation (“IBFC”) and First National Bankers Bank (“FNBB”) stock. These investments are carried at cost which approximates fair value. The balance of equity securities in our correspondent banks at December 31, 2018 and 2017 was $11.9 million and $9.8 million , respectively. In addition, at December 31, 2018, equity securities include securities previously held as available for sale securities prior to January 1, 2018. See Impact of New Accounting Pronouncements below for more details.
Loans	Loans The Company’s loan portfolio categories include real estate, commercial and consumer loans. Real estate loans are further categorized into construction and development, one-to-four family residential, multifamily, farmland and commercial real estate loans. The consumer loan category includes loans originated through indirect lending. Indirect lending, which is lending initiated through third-party business partners, is largely comprised of loans made through automotive dealerships. Loans that management has the intent and ability to hold for the foreseeable future or until maturity or pay-off are stated at the unpaid principal balance outstanding, net of purchase premiums or discounts, deferred income (net of costs), any direct principal charge-offs, and an allowance for loan losses. Interest on loans is calculated by using the effective interest rate on daily balances of the principal amount outstanding. Loan origination fees, net of direct loan origination costs, and commitment fees, are deferred and amortized as an adjustment to yield over the life of the loan, or over the commitment period, as applicable. Loans are considered past due if the required principal and interest payments have not been received as of the date such payments were due. Loans are ordinarily placed on nonaccrual when a loan is specifically determined to be impaired or when principal or interest is delinquent for 90 days or more; however, management may elect to continue the accrual when the estimated net realizable value of collateral is sufficient to cover the principal balance and the accrued interest. Any unpaid interest previously accrued on nonaccrual loans is reversed from income. Interest income, generally, is not recognized on specific impaired loans unless the likelihood of further loss is remote. Interest payments received on such loans are applied as a reduction of the loan principal balance. Interest income on other nonaccrual loans is recognized only to the extent of interest payments received. A loan may be returned to accrual status when all the principal and interest amounts contractually due are brought current and future principal and interest amounts contractually due are reasonably assured, which is typically evidenced by a sustained period of repayment performance by the borrower. The Company considers a loan to be impaired when, based upon current information and events, it believes it is probable that the Company will be unable to collect all amounts due according to the contractual terms of the loan agreement. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. The Company’s impaired loans include troubled debt restructurings and performing and non-performing loans for which full payment of principal or interest is not expected. Large groups of smaller balance homogenous loans are collectively evaluated for impairment. The Company calculates an allowance required for impaired loans based on the present value of expected future cash flows discounted at the loan’s effective interest rate, the loan’s observable market price or the fair value of its collateral. If the recorded investment in the impaired loan exceeds the measure of fair value, a valuation allowance is required as a component of the allowance for loan losses. Changes to the valuation allowance are recorded as a component of the provision for loan losses. The Company follows the FASB accounting guidance on sales of financial assets, which includes participating interests in loans. For loan participations that are structured in accordance with this guidance, the sold portions are recorded as a reduction of the loan portfolio. Loan participations that do not meet the criteria are accounted for as secured borrowings. See Acquisition Accounting and Acquired Impaired Loans below for accounting treatment of loans acquired through business acquisitions.
Loans Held for Sale	Loans Held for Sale Loans originated and intended for sale in the secondary market are carried at the lower of cost or fair value. For loans carried at the lower of cost or fair value, gains and losses on loan sales (sales proceeds minus carrying value) are recorded in noninterest income, and direct loan origination costs and fees are deferred at origination of the loan and are recognized in noninterest income upon sale of the loan.
Allowance for Loan Losses	Allowance for Loan Losses The adequacy of the allowance for loan losses is determined in accordance with U.S. GAAP. The allowance for loan losses is estimated through a provision for loan losses charged to earnings. Loan losses are charged against the allowance when management believes the loan balance is uncollectable. Subsequent recoveries, if any, are credited to the allowance. The allowance is an amount that management believes will be adequate to absorb probable losses inherent in the loan portfolio as of the balance sheet date based on evaluations of the collectability of loans and prior loan loss experience. The evaluations take into consideration such factors as changes in the nature and volume of the loan portfolio, overall portfolio quality, review of specific problem loans, and current economic conditions that may affect the borrower’s ability to pay. This evaluation is inherently subjective as it requires estimates that are susceptible to significant revision as more information becomes available. Allowances for impaired loans are generally determined based on collateral values or the present value of estimated cash flows. Credits deemed uncollectible are charged to the allowance. Provisions for loan losses and recoveries on loans previously charged off are adjusted to the allowance. Past due status is determined based on contractual terms. The allowance consists of allocated and general components. The allocated component relates to loans that are classified as impaired. For loans that are classified as impaired, an allowance is established when the discounted cash flows (or collateral value or observable market price) of the impaired loan is lower than the carrying value of that loan. The general component covers non-classified loans and is based on historical loss experience adjusted for qualitative factors. Based on management’s review and observations made through qualitative review, management may apply qualitative adjustments to determine loss estimates at a group and/or portfolio segment level as deemed appropriate. Management has an established methodology to determine the adequacy of the allowance for loan losses that assesses the risks and losses inherent in its portfolio and portfolio segments. The Company utilizes an internally developed model that requires judgment to determine the estimation method that fits the credit risk characteristics of the loans in its portfolio and portfolio segments. Qualitative and environmental factors that may not be directly reflected in quantitative estimates include: asset quality trends, changes in loan concentrations, new products and process changes, changes and pressures from competition, changes in lending policies and underwriting practices, trends in the nature and volume of the loan portfolio, changes in experience and depth of lending staff and management and national and regional economic trends. The Company also considers third party or comparable company loss data. Changes in these factors are considered in determining changes in the allowance for loan losses. The impact of these factors on the Company’s qualitative assessment of the allowance for loan losses can change from period to period based on management’s assessment of the extent to which these factors are already reflected in historic loss rates. The uncertainty inherent in the estimation process is also considered in evaluating the allowance for loan losses. In the ordinary course of business, the Bank enters into commitments to extend credit and standby letters of credit. Such financial instruments are recorded in the financial statements when they become payable. The credit risk associated with these commitments is evaluated in a manner similar to the allowance for loan losses. The reserve for unfunded lending commitments is included in other liabilities in the balance sheet.
Troubled Debt Restructurings	Troubled Debt Restructurings The Company periodically grants concessions to its customers in an attempt to protect as much of its investment as possible and minimize the risk of loss. These concessions may include restructuring the terms of a customer loan, thereby adjusting the customer’s payment requirements. In accordance with the FASB’s Accounting Standards Update (“ASU”) 2011-2, Receivables (Topic 310): A Creditor’s Determination of Whether a Restructuring is a Troubled Debt Restructuring , in order to be considered a troubled debt restructuring (a “TDR”), the Company must conclude that the restructuring constitutes a concession and the customer is experiencing financial difficulties. The Company defines a concession to a customer as a modification of existing loan terms for economic or legal reasons that it would otherwise not consider. Concessions are typically granted through an agreement with the customer or are imposed by a court of law. Concessions include modifying original loan terms to reduce or defer cash payments required as part of the loan agreement, including but not limited to a reduction of the stated interest rate for the remaining original life of the debt, an extension of the maturity date or dates at a stated interest rate lower than the current market rate for new debt with similar risk characteristics, a reduction of the face amount or maturity amount of the debt, or a reduction of accrued interest receivable on a debt. In its determination of whether the customer is experiencing financial difficulties, the Company considers numerous indicators, including but not limited to, whether the customer has declared or is in the process of declaring bankruptcy, whether there is substantial doubt about the customer’s ability to continue as a going concern, whether the Company believes the customer’s future cash flows will be insufficient to service the debt in accordance with the contractual terms of the existing agreement for the foreseeable future, and whether without modification the customer cannot obtain sufficient funds from other sources at an effective interest rate equal to the current market rate for similar debt for a non-troubled debtor. If the Company concludes that both a concession has been granted and the concession was granted to a customer experiencing financial difficulties, the Company identifies the loan as a TDR. For purposes of the determination of an allowance for loan losses on these TDRs, the loan is reviewed for specific impairment in accordance with the Company’s allowance for loan loss methodology. If it is determined that losses are probable on such TDRs, either because of delinquency or other credit quality indicators, the Company establishes specific reserves for these loans.
Servicing Rights	Servicing Rights Primary servicing rights represent the Company’s right to service consumer automobile loans for third-party whole-loan sales and loans sold as participations. Primary servicing involves the collection of payments from individual borrowers and the distribution of these payments to the investors. The Company capitalizes the value expected to be realized from performing specified automobile servicing activities for others as automobile servicing rights (“ASRs”) when the expected future cash flows from servicing are projected to be more than adequate compensation for such activities. These capitalized servicing rights are purchased or retained upon sale of consumer automobile loans. The Company measures all consumer automobile servicing assets and liabilities at fair value. The Company defines servicing rights based on both the availability of market inputs and the manner in which the Company manages the risks of servicing assets and liabilities. The Company leverages all available relevant market data to determine the fair value of recognized servicing assets and liabilities. The Company calculates the fair value of ASRs using various assumptions including future cash flows, market discount rates, expected prepayments, servicing costs and other factors. A significant change in prepayments of loans in the servicing portfolio could result in significant changes in the valuation adjustments, thus creating potential volatility in the carrying amount of ASRs.
Other Real Estate Owned	Other Real Estate Owned Real estate acquired through, or in lieu of, foreclosure, or other real estate owned on the consolidated balance sheets, is initially recorded at fair value at the time of foreclosure, less estimated selling cost, and any related write down is charged to the allowance for loan losses. Valuations are periodically performed by management and provisions for estimated losses on other real estate owned are charged to expense when fair value is determined to be less than the carrying value. Costs relative to the development and improvement of properties are capitalized to the extent realizable, whereas ordinary upkeep disbursements are charged to expense. The ability of the Company to recover the carrying value of real estate is based upon future sales of the other real estate owned. The ability to affect such sales is subject to market conditions and other factors, many of which are beyond the Company’s control. Operating income and expense of such properties is included in other operating income or expense, respectively, on the accompanying consolidated statements of income. Gain or loss on the disposition of such properties is included in noninterest income on the consolidated statements of income.
Bank Premises and Equipment	Bank Premises and Equipment Land is carried at cost. Buildings and equipment are stated at cost, less accumulated depreciation. Depreciation expense is computed by the straight-line method and is charged to expense over the estimated useful lives of the assets, which range from 1 to 39 years. Costs of major additions and improvements are capitalized. Expenditures for maintenance and repairs are expensed as incurred. Gains or losses on the disposition of land, buildings, and equipment are included in noninterest income on the consolidated statements of income.
Bank Owned Life Insurance	Bank Owned Life Insurance The Company invests in bank owned life insurance (“BOLI”) policies that provide earnings to help cover the cost of employee benefit plans. The Company is the owner and beneficiary of the life insurance policies it purchased directly on a chosen group of employees. The policies are carried on the Company’s consolidated balance sheet at their cash surrender value and are subject to regulatory capital requirements. The determination of the cash surrender value includes a full evaluation of the contractual terms of each policy and assumes the surrender of policies on an individual-life by individual-life basis. Additionally, the Company periodically reviews the creditworthiness of the insurance companies that have underwritten the policies. Earnings accruing to the Company are derived from the general account investments of the insurance companies. Increases in the net cash surrender value of BOLI policies and insurance proceeds received are not taxable and are recorded in noninterest income in the consolidated statements of income.
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill represents the excess of the purchase price over the fair value of the net identifiable assets acquired in a business combination. Goodwill and other intangible assets deemed to have an indefinite useful life are not amortized but instead are subject to review for impairment annually, or more frequently if deemed necessary, in accordance with the provisions of FASB ASC Topic 350, Intangibles – Goodwill and Other . Intangible assets with estimable useful lives are amortized over their respective estimated useful lives and reviewed for impairment in accordance with FASB ASC Topic 360, Property, Plant, and Equipment. If impaired, the asset is written down to its estimated fair value. No impairment charges have been recognized through December 31, 2018 . Core deposit intangibles representing the value of the acquired core deposit base are generally recorded in connection with business combinations involving banks and branch locations. The Company’s policy is to amortize core deposit intangibles over the estimated useful life of the deposit base. The remaining useful lives of core deposit intangibles are evaluated periodically to determine whether events and circumstances warrant revision of the remaining period of amortization. The Company’s core deposit intangibles are currently amortized using the sum-of-the-years-digits basis over 10 to 15 years.
Repurchase Agreements	Repurchase Agreements Securities sold under agreements to repurchase are secured borrowings treated as financing activities and are carried at the amounts at which the securities will be subsequently reacquired as specified in the respective agreements.
Stock-Based Compensation	Stock-Based Compensation The Company accounts for stock-based compensation under the provisions of ASC Topic 718, Compensation - Stock Compensation . Under this accounting guidance, fair value is established as the measurement objective in accounting for share-based payment awards and requires the application of a fair value based measurement method in accounting for compensation costs, which is recognized over the requisite service period. The impact of forfeitures of share-based payment awards on compensation expense is recognized as forfeitures occur. See Note 14, Stock-Based Compensation, for further disclosures regarding stock-based compensation.
Off-Balance Sheet Credit-Related Financial Instruments	Off-Balance Sheet Credit-Related Financial Instruments The Company accounts for its guarantees in accordance with the provisions of ASC Topic 460, Guarantees . In the ordinary course of business, the Company has entered into commitments to extend credit, including commitments under credit card agreements, commercial letters of credit and standby letters of credit. Such financial instruments are recorded when they are funded.
Derivatives Financial Instruments	Derivative Financial Instruments ASC Topic 815, Derivatives and Hedging , requires that all derivatives be recognized as assets or liabilities in the balance sheet at fair value. Derivatives executed with the same counterparty are generally subject to master netting arrangements, however, fair value amounts recognized for derivative financial instruments and fair value amounts recognized for the right/obligation to reclaim/return cash collateral are not offset for financial reporting purposes. In the course of its business operations, the Company is exposed to certain risks, including interest rate, liquidity and credit risk. The Company manages its risks through the use of derivative financial instruments, primarily through management of exposure due to the receipt or payment of future cash amounts based on interest rates. The Company’s derivative financial instruments manage the differences in the timing, amount and duration of expected cash receipts and payments. Derivatives which are designated and qualify as a hedge of the exposure to variability in expected future cash flows, or other types of forecasted transactions, are considered cash flow hedges. The effective portion of the derivative’s gain or loss is initially reported as a component of other comprehensive income and subsequently reclassified into earnings when the forecasted transaction affects earnings or when the hedge is terminated. The ineffective portion of the gain or loss is reported in earnings immediately. In applying hedge accounting for derivatives, the Company establishes a method for assessing the effectiveness of the hedging derivative and a measurement approach for determining the ineffective aspect of the hedge upon the inception of the hedge. These methods are consistent with the Company’s approach to managing risk. Note 12, Derivative Financial Instruments, describes the derivative instruments currently used by the Company and discloses how these derivatives impact the Company’s financial position and results of operations.
Income Taxes	Income Taxes The provision for income taxes is based on amounts reported in the consolidated statements of income after exclusion of nontaxable income such as interest on state and municipal securities. Also, certain items of income and expenses are recognized in different time periods for financial statement purposes than for income tax purposes. Thus, provisions for deferred taxes are recorded in recognition of such temporary differences. Deferred taxes are determined utilizing a liability method whereby deferred tax assets are recognized for deductible temporary differences and deferred tax liabilities are recognized for taxable temporary differences. Temporary differences are the differences between the reported amounts of assets and liabilities and their tax bases. Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not that some portion or all of the deferred tax assets will not be realized. Deferred tax assets and liabilities are adjusted for the effects of changes in tax laws and rates on the date of enactment. The Company has adopted accounting guidance related to accounting for uncertainty in income taxes, which sets out a consistent framework to determine the appropriate level of tax reserves to maintain for uncertain tax positions. The Company recognizes interest and penalties on income taxes as a component of income tax expense.
Revenue Recognition	Revenue Recognition The Company recognizes revenue in the consolidated statements of income as it is earned and when collectability is reasonably assured. The primary source of revenue is interest income from interest-earning assets, which is recognized on the accrual basis of accounting using the effective interest method. The recognition of revenues from interest-earning assets is based upon formulas from underlying loan agreements, securities contracts, or other similar contracts. Noninterest income is recognized on the accrual basis of accounting as services are provided or as transactions occur. Noninterest income includes fees from deposit accounts, merchant services, ATM and debit card fees, servicing fees, and other miscellaneous services and transactions.
Earnings Per Share	Earnings Per Share Basic earnings per share is calculated using the two-class method. The two-class method is an earnings allocation formula that determines earnings per share separately for common stock and participating securities according to dividends declared and participation rights in undistributed earnings. Under this method, all earnings distributed and undistributed, are allocated to participating securities and common shares based on their respective rights to receive dividends. Unvested share-based payment awards that contain nonforfeitable rights to dividends are considered participating securities (i.e. unvested time-vested restricted stock), not subject to performance based measures. Basic earnings per share is calculated by dividing net income available to common shareholders by the weighted-average number of common shares outstanding during the period. Diluted earnings per share is calculated in a manner similar to that of basic earnings per share except that the weighted average number of common shares outstanding is increased to include the number of additional common shares that would have been outstanding if all potentially dilutive common shares (such as those resulting from the exercise of stock options and warrants) were issued during the period, computed using the treasury stock method.
Statements of Cash Flows	Statements of Cash Flows For purposes of the statements of cash flows, cash and cash equivalents include cash and amounts due from banks and federal funds sold due to the short-term nature of these items.
Comprehensive Income	Comprehensive Income Comprehensive income includes net income and other comprehensive income or loss, which in the case of the Company includes unrealized gains and losses on securities and changes in the fair value of interest rate swaps, net of related income taxes.
Acquisition Accounting	Acquisition Accounting Acquisitions are accounted for under the purchase method of accounting. Purchased assets and assumed liabilities are recorded at their respective acquisition date fair values, and identifiable intangible assets are recorded at fair value. If the consideration given exceeds the fair value of the net assets received, goodwill is recognized. If the fair value of the net assets received exceeds the consideration given, a bargain purchase gain is recognized. Fair values are subject to refinement for up to one year after the closing date of an acquisition as information relative to closing date fair values becomes available. Purchased loans acquired in a business combination are recorded at their estimated fair value as of the acquisition date. The fair value of loans acquired is determined using a discounted cash flow model based on assumptions regarding the amount and timing of principal and interest prepayments, estimated payments, estimated default rates, estimated loss severity in the event of defaults, and current market rates. The fair value adjustment for performing acquired loans is amortized over the life of the loan using the effective interest method. Estimated credit losses are included in the determination of fair value; therefore, an allowance for loan losses is not recorded on the acquisition date. Subsequent to acquisition, acquired performing loans are evaluated using a similar allowance methodology as the legacy portfolio. An allowance for credit losses is only recorded to the extent that the required reserves exceed the unaccreted fair value adjustment.
Acquired Impaired Loans	Acquired Impaired Loans The Company accounts for acquired impaired loans under FASB ASC Topic 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality (“ASC 310-30”). An acquired loan is considered impaired when there is evidence of credit deterioration since origination and it is probable at the date of acquisition that the Company will be unable to collect all contractually required payments. For acquired impaired loans, the Company (a) calculates the contractual amount and timing of undiscounted principal and interest payments (the “undiscounted contractual cash flows”) and (b) estimates the amount and timing of undiscounted expected principal and interest payments (the “undiscounted expected cash flows”). Under ASC 310-30, the difference between the undiscounted contractual cash flows and the undiscounted expected cash flows is the nonaccretable difference. The nonaccretable difference represents an estimate of the loss exposure of principal and interest related to the acquired impaired loan portfolio, and such amount is subject to change over time based on the performance of such loans. The excess of expected cash flows at acquisition over the initial fair value of acquired impaired loans is referred to as the “accretable yield” and is recorded as interest income over the estimated life of the loans using the effective yield method if the timing and amount of the future cash flows is reasonably estimable. As required by ASC 310-30, the Company periodically re-estimates the expected cash flows to be collected over the life of the acquired impaired loans. Improvements in expected cash flows over those originally estimated increase the accretable yield and are recognized as interest income prospectively. Decreases in the amount and changes in the timing of expected cash flows compared to those originally estimated decrease the accretable yield and usually result in a provision for loan losses and the establishment of an allowance for loan losses with respect to the acquired impaired loan. The carrying value of acquired impaired loans is reduced by payments received, both principal and interest, and increased by the portion of the accretable yield recognized as interest income. If future cash flows are not reasonably estimable, the Company accounts for the acquired loans using the cash basis method.
Share Repurchases	Share Repurchases Effective January 1, 2015, companies incorporated under Louisiana law became subject to the Louisiana Business Corporation Act. Provisions of the Louisiana Business Corporation Act eliminate the concept of treasury stock. Rather, shares purchased by the Company constitute authorized but unissued shares. Accounting principles generally accepted in the United States of America state that accounting for treasury stock shall conform to state law. The Company’s consolidated financial statements as of December 31, 2018 and 2017 reflect this change. The cost of shares purchased by the Company has been allocated to common stock and surplus balances.
Reclassifications	Reclassifications Certain reclassifications have been made to the 2017 and 2016 financial statements to confirm to the 2018 presentation.
Recent Accounting Pronouncements	Recent Accounting Pronouncements This section briefly describes accounting standards that have been issued, but are not yet adopted, that could impact the Company’s financial statements. FASB ASC Topic 250 “Intangibles - Goodwill and Other - Internal Use Software (Subtopic 250-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract” Update No. 2018-15. In August 2018, the FASB issued ASU 2018-15. This ASU requires an entity in a cloud computing arrangement (i.e., hosting arrangement) that is a service contract to follow the internal-use software guidance in ASC 350-40 to determine which implementation costs to capitalize as assets or expense as incurred. Capitalized implementation costs should be presented in the same line item on the balance sheet as amounts prepaid for the hosted service, if any (generally as an “other asset”). The capitalized costs will be amortized over the term of the hosting arrangement, with the amortization expense being presented in the same income statement line item as the fees paid for the hosted service. ASU 2018-15 is effective for the Company on January 1, 2020. Early adoption is permitted, including adoption in any interim period. The adoption of ASU 2018-15 is not expected to have a material impact on the Company’s consolidated financial statements. FASB ASC Topic 820 “Fair Value Measurement: Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement” Update No. 2018-13 . In August 2018, the FASB issued ASU 2018-13, which modifies the disclosure requirements for fair value measurements by removing, modifying, or adding certain disclosures. ASU 2018-13 removes the disclosure requirement detailing the amount of and reasons for transfers between Level 1 and Level 2 and the valuation processes for Level 3 fair value measurements will be removed. In addition, this ASU modifies the disclosure requirement for investments in certain entities that calculate net asset value. Lastly, ASU 2018-13 adds a disclosure requirement for changes in unrealized gains and losses for the period included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period and the range and weighted average of significant unobservable inputs used to develop Level 3 measurements. ASU 2018-13 is effective for the Company on January 1, 2020. Early adoption is permitted upon the issuance of ASU 2018-13. The removed and modified disclosures will be adopted on a retrospective basis, and the new disclosures will be adopted on a prospective basis. The adoption of ASU 2018-13 is not expected to have a material impact on the Company’s consolidated financial statements. FASB ASC Topic 718 “Compensation - Stock Compensation: Improvements to Nonemployees Share-Based Payment Accounting” Update No. 2018-07 . In June 2018, the FASB issued ASU 2018-07, which expands the scope of Topic 718 (which currently only includes share-based payments to employees) to include share-based payments issued to nonemployees for goods or services. As this ASU becomes effective, the accounting for share-based payments for nonemployees and employees will be substantially the same. The ASU supersedes Subtopic 505-50, “Equity – Equity-Based Payments to Non-Employees”. ASU 2018-07 is effective for the Company on January 1, 2019. The adoption of ASU 2018-07 is not expected to have a material impact on the Company’s consolidated financial statements. FASB ASC Topic 815 “Derivatives and Hedging” ASU No. 2017-12. The Financial Accounting Standards Board (“FASB”) issued ASU No. 2017-12 in August 2017. The ASU amends the hedge accounting model in Topic 815 to enable entities to better portray the economics of their risk management activities in the financial statements and enhance the transparency and understandability of hedge results. The amendments expand an entity’s ability to hedge nonfinancial and financial risk components and reduce complexity in fair value hedges of interest rate risk. The guidance eliminates the requirement to separately measure and report hedge ineffectiveness and generally requires the entire change in the fair value of a hedging instrument to be presented in the same income statement line as the hedged item. The guidance also eases certain documentation and assessment requirements and modifies the accounting for components excluded from the assessment of hedge effectiveness. This amended guidance is effective for the Company on January 1, 2019, and, given the current level of derivatives designated as hedges, is not expected to have a material impact on our consolidated operating results or financial condition. FASB ASC Subtopic 310-20 “Receivables – Nonrefundable Fees and Other Costs, Premium Amortization on Purchased Callable Debt Securities” ASU No. 2017-08 . The FASB issued ASU No. 2017-08 in March 2017. The amendments in the ASU shorten the amortization period for certain callable debt securities held at a premium. Specifically, the amendments require the premium to be amortized to the earliest call date. The amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. ASU 2017-08 will be effective for the Company beginning January 1, 2019. Early adoption is permitted, including adoption in an interim period. If an entity early adopts in an interim period, any adjustments should be reflected as of the beginning of the fiscal year that includes that interim period. The amendments should be applied on a modified retrospective basis, with a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The Company does not expect the adoption of ASU 2017-08 to have a material impact on the financial statements. FASB ASC Topic 350 “Intangibles-Goodwill and Other: Simplifying the Test for Goodwill Impairment” ASU No. 2017-04. The FASB issued ASU No. 2017-04 in January 2017. This ASU simplifies how an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test. Therefore, any carrying amount which exceeds the reporting unit’s fair value, up to the amount of goodwill recorded, will be recognized as an impairment loss. ASU 2017-04 will be effective for the Company on January 1, 2020. The amendments will be applied prospectively on or after the effective date. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. Based on recent goodwill impairments tests, which did not require the application of Step 2, the Company does not expect the adoption of this ASU to have a material impact. FASB ASC Topic 326 “Financial Instruments – Credit Losses: Measurement of Credit Losses on Financial Instruments” ASU No. 2016-13. The FASB issued ASU No. 2016-13 in June 2016. The ASU requires the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts and requires enhanced disclosures related to the significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of an organization’s portfolio. In addition, ASU 2016-13 amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. ASU 2016-13 will be effective for the Company on January 1, 2020. We are currently evaluating the potential impact of ASU 2016-13 on our financial statements. In that regard, we have formed a cross-functional working group, under the direction of our Chief Financial Officer and our Chief Risk Officer. The working group is comprised of individuals from various functional areas including credit, risk management, finance and information technology. We have developed an implementation plan to include assessment of processes, portfolio segmentation, model development, system requirements and the identification of data and resource needs, among other things. We have also selected a third-party vendor solution to assist us in the application of the ASU 2016-13. The adoption of ASU 2016-13 is likely to result in an increase in the allowance for loan losses as a result of changing from an “incurred loss” model, which encompasses allowances for current known and inherent losses within the portfolio, to an “expected loss” model, which encompasses allowances for losses expected to be incurred over the life of the portfolio. Furthermore, ASU 2016-13 will necessitate that we establish an allowance for expected credit losses on debt securities. While we are currently unable to reasonably estimate the impact of adopting ASU 2016-13, we expect that the impact of adoption will be significantly influenced by the composition, characteristics and quality of our loan and securities portfolios as well as the prevailing economic conditions and forecasts as of the adoption date. FASB ASC Topic 842 “Leases” ASU No. 2016-02. The FASB issued ASU No. 2016-02 in February 2016. The ASU will, among other things, require lessees to recognize a lease liability, which is a lessee’s obligation to make lease payments arising from a lease, measured on a discounted basis; and a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. ASU 2016-02 does not significantly change lease accounting requirements applicable to lessors; however, certain changes were made to align, where necessary, lessor accounting with the lessee accounting model and ASC Topic 606, “Revenue from Contracts with Customers.” ASU 2016-02 will be effective for the Company beginning January 1, 2019 and initially required transition using a modified retrospective approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. In July 2018, the FASB issued ASU 2018-11, “Leases (Topic 842) - Targeted Improvements,” which, among other things, provides an additional transition method that would allow entities to not apply the guidance in ASU 2016-02 in the comparative periods presented in the financial statements and instead recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. In December 2018, the FASB also issued ASU 2018-20, “Leases (Topic 842) - Narrow-Scope Improvements for Lessors,” which provides for certain policy elections and changes lessor accounting for sales and similar taxes and certain lessor costs. Upon adoption of ASU 2016-02, ASU 2018-11 and ASU 2018-20 on January 1, 2019, we expect to recognize a right-of-use asset and a related lease liability totaling $1.2 million related to a lease that became effective on December 31, 2018. We expect to elect to apply certain practical expedients provided under ASU 2016-02 whereby we will not reassess (i) whether any expired or existing contracts are or contain leases, (ii) the lease classification for any expired or existing leases and (iii) initial direct costs for any existing leases. We also do not expect to apply the recognition requirements of ASU 2016-02 to any short-term leases (as defined by related accounting guidance). We expect to utilize the cumulative-effect adjustment transition approach prescribed by ASU 2018-11. As the majority of the Company’s properties and all of the Company’s equipment are owned, not leased, we do not expect the adoption of this ASU to have a material impact to the Company’s consolidated balance sheet.

BUSINESS COMBINATIONS (Tables)

BUSINESS COMBINATIONS (Tables)	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Schedule Of Recognized Identified Assets Acquired and Liabilities Assumed	The table below shows the allocation of the consideration paid for Citizens’ common equity to the acquired identifiable assets and liabilities assumed and the goodwill generated from the transaction (dollars in thousands). Purchase price: Cash paid $ 45,800 Fair value of assets acquired: Cash and cash equivalents 44,565 Investment securities 69,912 Loans 129,181 Bank premises and equipment 3,307 Core deposit intangible asset 1,462 Other assets 2,223 Total assets acquired 250,650 Fair value of liabilities acquired: Deposits 212,228 Other liabilities 1,675 Total liabilities assumed 213,903 Fair value of net assets acquired 36,747 Goodwill $ 9,053 The table below shows the allocation of the consideration paid for BOJ’s common equity to the acquired identifiable assets and liabilities assumed and the goodwill generated from the transaction (dollars in thousands). Purchase price: Cash paid $ 3,950 Common stock 18,749 Fair value of assets acquired: Cash and cash equivalents 26,438 Investment securities 16,194 Loans 102,393 Bank premises and equipment 3,725 Core deposit intangible asset 1,018 Other assets 2,375 Total assets acquired 152,143 Fair value of liabilities acquired: Deposits 125,788 FHLB advances 5,956 Trust preferred 2,178 Other liabilities 1,209 Total liabilities assumed 135,131 Fair value of net assets acquired 17,012 Goodwill $ 5,687
Business Combination, Separately Recognized Transactions	The table below presents information about the loans acquired as of the date of acquisition (dollars in thousands). Purchase Credit Impaired Contractually required principal $ 4,557 Non-accretable difference (671 ) Cash flows expected to be collected 3,886 Accretable yield — Fair value of acquired loans $ 3,886 The table below presents information about the loans acquired with deteriorated credit quality from Citizens as of the date of acquisition (dollars in thousands). Purchase Credit Impaired Contractually required principal $ 5,123 Non-accretable difference (700 ) Cash flows expected to be collected 4,423 Accretable yield — Fair value of acquired loans $ 4,423
Business Acquisition, Pro Forma Information	The pro forma net income for the year ended December 31, 2017 excludes the tax-affected amount of $2.2 million of acquisition expenses recorded in noninterest expense by the Company, Citizens, and BOJ. Unaudited Pro Forma Information for the years ended December 31, (dollars in thousands) 2017 2016 Interest income $ 64,222 $ 58,996 Noninterest income 5,248 7,392 Net income 10,641 11,979

INVESTMENT SECURITIES (Tables)

INVESTMENT SECURITIES (Tables)	12 Months Ended
	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Schedule of Amortized Cost, Approximate Fair Value and Proceeds from Sale of Investment Securities Classified as Available for Sale	The amortized cost and approximate fair value of investment securities classified as AFS are summarized below as of the dates presented (dollars in thousands). December 31, 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Obligations of U.S. government agencies and corporations $ 7,946 $ 14 $ (90 ) $ 7,870 Obligations of state and political subdivisions 34,875 6 (895 ) 33,986 Corporate bonds 16,166 53 (710 ) 15,509 Residential mortgage-backed securities 136,768 336 (2,177 ) 134,927 Commercial mortgage-backed securities 57,749 108 (1,168 ) 56,689 Total $ 253,504 $ 517 $ (5,040 ) $ 248,981 Proceeds from sales of investment securities AFS and gross realized gains and losses are summarized below as of the dates presented (dollars in thousands). Twelve months ended December 31, 2018 2017 2016 Proceeds from sale $ 7,021 $ 106,448 $ 15,515 Gross gains $ 35 $ 342 $ 443 Gross losses $ (21 ) $ (50 ) $ —
Schedule of Amortized Cost and Approximate Fair Value of Investment Securities Classified as Available for Sale	December 31, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Obligations of U.S. government agencies and corporations $ 8,241 $ 8 $ (81 ) $ 8,168 Obligations of state and political subdivisions 35,572 87 (422 ) 35,237 Corporate bonds 16,428 112 (330 ) 16,210 Residential mortgage-backed securities 110,690 58 (1,270 ) 109,478 Commercial mortgage-backed securities 48,299 16 (686 ) 47,629 Equity securities 847 24 (29 ) 842 Total $ 220,077 $ 305 $ (2,818 ) $ 217,564
Schedule of Amortized Cost and Approximate Fair Value of Investment Securities Classified as Held to Maturity	The amortized cost and approximate fair value of investment securities classified as HTM are summarized below as of the dates presented (dollars in thousands). December 31, 2018 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Obligations of state and political subdivisions $ 10,699 $ 2 $ (111 ) $ 10,590 Residential mortgage-backed securities 5,367 — (152 ) 5,215 Total $ 16,066 $ 2 $ (263 ) $ 15,805 December 31, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Obligations of state and political subdivisions $ 11,861 $ 9 $ (15 ) $ 11,855 Residential mortgage-backed securities 6,136 4 (48 ) 6,092 Total $ 17,997 $ 13 $ (63 ) $ 17,947
Schedule of Unrealized Losses and Fair Value by Investment Category for Securities Available for Sale	The number of AFS securities, fair value, and unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, are summarized below as of the dates presented (dollars in thousands). Less than 12 Months 12 Months or More Total December 31, 2018 Count Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Obligations of U.S. government agencies and corporations 15 $ 469 $ — $ 5,304 $ (90 ) $ 5,773 $ (90 ) Obligations of state and political subdivisions 63 13,716 (330 ) 19,270 (565 ) 32,986 (895 ) Corporate bonds 27 6,793 (225 ) 5,763 (485 ) 12,556 (710 ) Residential mortgage-backed securities 193 24,868 (245 ) 79,517 (1,932 ) 104,385 (2,177 ) Commercial mortgage-backed securities 94 5,156 (42 ) 39,560 (1,126 ) 44,716 (1,168 ) Total 392 $ 51,002 $ (842 ) $ 149,414 $ (4,198 ) $ 200,416 $ (5,040 )
Schedule of Unrealized Losses and Fair Value by Investment Category for Securities Available for Sale	Less than 12 Months 12 Months or More Total December 31, 2017 Count Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Obligations of U.S. government agencies and corporations 14 $ 5,815 $ (50 ) $ 1,505 $ (31 ) $ 7,320 $ (81 ) Obligations of state and political subdivisions 57 12,315 (77 ) 9,930 (345 ) 22,245 (422 ) Corporate bonds 20 1,116 (6 ) 6,273 (324 ) 7,389 (330 ) Residential mortgage-backed securities 159 71,893 (729 ) 28,410 (541 ) 100,303 (1,270 ) Commercial mortgage-backed securities 80 30,445 (406 ) 11,216 (280 ) 41,661 (686 ) Equity securities 1 — — 478 (29 ) 478 (29 ) Total 331 $ 121,584 $ (1,268 ) $ 57,812 $ (1,550 ) $ 179,396 $ (2,818 )
Schedule of Unrealized Losses and Fair Value by Investment Category for Securities Held to Maturity	The number of HTM securities, fair value, and unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, are summarized below as of the dates presented (dollars in thousands). Less than 12 Months 12 Months or More Total December 31, 2018 Count Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Obligations of state and political subdivisions 1 $ — $ — $ 5,468 $ (111 ) $ 5,468 $ (111 ) Residential mortgage-backed securities 9 1,761 (35 ) 3,454 (117 ) 5,215 (152 ) Total 10 $ 1,761 $ (35 ) $ 8,922 $ (228 ) $ 10,683 $ (263 ) Less than 12 Months 12 Months or More Total December 31, 2017 Count Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses Obligations of state and political subdivisions 1 $ 6,007 $ (15 ) $ — $ — $ 6,007 $ (15 ) Residential mortgage-backed securities 6 1,601 (3 ) 2,522 (45 ) 4,123 (48 ) Total 7 $ 7,608 $ (18 ) $ 2,522 $ (45 ) $ 10,130 $ (63 )
Schedule of Weighted Average Tax Equivalent Yield, Amortized Cost and Approximate Fair Value of Investment Debt Securities by Contractual Maturity (Including Mortgage-backed Securities)	The amortized cost and approximate fair value of investment debt securities, by contractual maturity (including mortgage-backed securities), are shown below as of the dates presented (dollars in thousands). Actual maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Securities Available For Sale Securities Held to Maturity December 31, 2018 Amortized Cost Fair Value Amortized Cost Fair Value Due within one year $ 3,734 $ 3,730 $ 755 $ 755 Due after one year through five years 10,681 10,600 3,405 3,406 Due after five years through ten years 44,255 43,460 960 961 Due after ten years 194,834 191,191 10,946 10,683 Total debt securities $ 253,504 $ 248,981 $ 16,066 $ 15,805 Securities Available For Sale Securities Held to Maturity December 31, 2017 Amortized Cost Fair Value Amortized Cost Fair Value Due within one year $ 1,319 $ 1,319 $ 720 $ 721 Due after one year through five years 15,379 15,331 3,245 3,249 Due after five years through ten years 28,242 27,833 1,875 1,878 Due after ten years 174,290 172,239 12,157 12,099 Total debt securities $ 219,230 $ 216,722 $ 17,997 $ 17,947

LOANS AND ALLOWANCE FOR LOAN _2

LOANS AND ALLOWANCE FOR LOAN LOSSES (Tables)	12 Months Ended
	Dec. 31, 2018
Receivables [Abstract]
Schedule of Loan Portfolio Excluding Loans Held for Sale	The Company’s loan portfolio consists of the following categories of loans as of the dates presented (dollars in thousands). December 31, 2018 2017 Construction and development $ 157,946 $ 157,667 1-4 Family 287,137 276,922 Multifamily 50,501 51,283 Farmland 21,356 23,838 Commercial real estate 627,004 537,364 Total mortgage loans on real estate 1,143,944 1,047,074 Commercial and industrial 210,924 135,392 Consumer 45,957 76,313 Total loans $ 1,400,825 $ 1,258,779
Schedule of Aging Analysis of Loans	The tables below provide an analysis of the aging of loans as of the dates presented (dollars in thousands). December 31, 2018 Accruing Current 30-59 Days Past Due 60-89 Days Past Due 90 Days or More Past Due Nonaccrual Total Past Due & Nonaccrual Acquired Impaired Loans Total Loans Construction and development $ 157,202 $ 175 $ — $ — $ 556 $ 731 $ 13 $ 157,946 1-4 Family 284,205 1,101 41 — 1,300 2,442 490 287,137 Multifamily 50,392 109 — — — 109 — 50,501 Farmland 19,092 — — — — — 2,264 21,356 Commercial real estate 624,244 66 — — 683 749 2,011 627,004 Total mortgage loans on real estate 1,135,135 1,451 41 — 2,539 4,031 4,778 1,143,944 Commercial and industrial 209,399 221 45 — 64 330 1,195 210,924 Consumer 44,493 375 51 — 994 1,420 44 45,957 Total loans $ 1,389,027 $ 2,047 $ 137 $ — $ 3,597 $ 5,781 $ 6,017 $ 1,400,825 December 31, 2017 Accruing Current 30-59 Days Past Due 60-89 Days Past Due 90 Days or More Past Due Nonaccrual Total Past Due & Nonaccrual Acquired Impaired Loans Total Loans Construction and development $ 157,123 $ 225 $ — $ — $ 34 $ 259 $ 285 $ 157,667 1-4 Family 273,321 1,396 185 56 478 2,115 1,486 276,922 Multifamily 50,271 — — — — — 1,012 51,283 Farmland 19,619 — — 58 — 58 4,161 23,838 Commercial real estate 535,014 107 89 — 67 263 2,087 537,364 Total mortgage loans on real estate 1,035,348 1,728 274 114 579 2,695 9,031 1,047,074 Commercial and industrial 133,009 977 67 — 10 1,054 1,329 135,392 Consumer 74,409 610 152 20 1,118 1,900 4 76,313 Total loans $ 1,242,766 $ 3,315 $ 493 $ 134 $ 1,707 $ 5,649 $ 10,364 $ 1,258,779
Summary of the Company's Loan Portfolio by Credit Quality Indicator	The tables below present a summary of the Company’s loan portfolio by category and credit quality indicator as of the dates presented (dollars in thousands). December 31, 2018 Pass Special Mention Substandard Doubtful Total Construction and development $ 157,360 $ — $ 586 $ — $ 157,946 1-4 Family 285,692 69 1,303 73 287,137 Multifamily 50,501 — — — 50,501 Farmland 19,092 — 2,264 — 21,356 Commercial real estate 625,670 — 1,334 — 627,004 Total mortgage loans on real estate 1,138,315 69 5,487 73 1,143,944 Commercial and industrial 207,941 — 2,983 — 210,924 Consumer 44,798 167 992 — 45,957 Total loans $ 1,391,054 $ 236 $ 9,462 $ 73 $ 1,400,825 December 31, 2017 Pass Special Mention Substandard Doubtful Total Construction and development $ 157,385 $ — $ 282 $ — $ 157,667 1-4 Family 275,492 74 1,356 — 276,922 Multifamily 51,283 — — — 51,283 Farmland 19,611 2,773 1,454 — 23,838 Commercial real estate 536,741 — 623 — 537,364 Total mortgage loans on real estate 1,040,512 2,847 3,715 — 1,047,074 Commercial and industrial 134,522 — 870 — 135,392 Consumer 74,934 258 1,121 — 76,313 Total loans $ 1,249,968 $ 3,105 $ 5,706 $ — $ 1,258,779
Schedule of Aggregate Amount of Loans to Related Parties	The table below shows the aggregate principal balance of loans to such related parties for the years ended December 31, 2018 and 2017 (dollars in thousands). December 31, 2018 2017 Balance, beginning of period $ 31,153 $ 19,957 New loans/changes in relationship 79,639 24,428 Repayments/changes in relationship (17,771 ) (13,232 ) Balance, end of period $ 93,021 $ 31,153
Summary of Accretable Yield on Acquired Impaired Loans	The table below shows the changes in the accretable yield on acquired impaired loans for the periods presented below (dollars in thousands). For the twelve months ended December 31, 2018 2017 Balance, beginning of period $ — $ 275 Loan disposals — (303 ) Accretion to interest income — 28 Balance, end of period $ — $ —
Summary of Allowance for Loan Losses	The table below shows a summary of the activity in the allowance for loan losses for the years ended December 31, 2018 , 2017 and 2016 (dollars in thousands). December 31, 2018 2017 2016 Balance, beginning of period $ 7,891 $ 7,051 $ 6,128 Provision for loan losses 2,570 1,540 2,079 Loans charged-off (1,185 ) (765 ) (1,228 ) Recoveries 178 65 72 Balance, end of period $ 9,454 $ 7,891 $ 7,051
Allowance for Loan Loss Activity by Collateral Type	The following tables outline the activity in the allowance for loan losses by collateral type for the years ended December 31, 2018 , 2017 and 2016 , and show both the allowance and portfolio balances for loans individually and collectively evaluated for impairment as of December 31, 2018 , 2017 and 2016 (dollars in thousands). December 31, 2018 Construction & Development Farmland 1-4 Family Multifamily Commercial Real Estate Commercial & Industrial Consumer Total Allowance for loan losses: Beginning balance $ 945 $ 60 $ 1,287 $ 332 $ 3,599 $ 693 $ 975 $ 7,891 Charge-offs (24 ) — (167 ) — — (481 ) (513 ) (1,185 ) Recoveries 12 — 29 — — 55 82 178 Provision 105 21 316 (1 ) 583 1,374 172 2,570 Ending balance $ 1,038 $ 81 $ 1,465 $ 331 $ 4,182 $ 1,641 $ 716 $ 9,454 Ending allowance balance for loans individually evaluated for impairment $ — $ — $ — $ — $ — $ — $ 236 $ 236 Ending allowance balance for loans acquired with deteriorated credit quality — — — — — — — — Ending allowance balance for loans collectively evaluated for impairment $ 1,038 $ 81 $ 1,465 $ 331 $ 4,182 $ 1,641 $ 480 $ 9,218 Loans receivable: Balance of loans individually evaluated for impairment $ 339 $ — $ 1,177 $ — $ 761 $ 76 $ 916 $ 3,269 Balance of loans acquired with deteriorated credit quality 13 2,264 490 — 2,011 1,195 44 6,017 Balance of loans collectively evaluated for impairment 157,594 19,092 285,470 50,501 624,232 209,653 44,997 1,391,539 Total period-end balance $ 157,946 $ 21,356 $ 287,137 $ 50,501 $ 627,004 $ 210,924 $ 45,957 $ 1,400,825 December 31, 2017 Construction & Development Farmland 1-4 Family Multifamily Commercial Real Estate Commercial & Industrial Consumer Total Allowance for loan losses: Beginning balance $ 579 $ 60 $ 1,377 $ 355 $ 2,499 $ 759 $ 1,422 $ 7,051 Charge-offs — — — — — (270 ) (495 ) (765 ) Recoveries 34 — 7 — — — 24 65 Provision 332 — (97 ) (23 ) 1,100 204 24 1,540 Ending balance $ 945 $ 60 $ 1,287 $ 332 $ 3,599 $ 693 $ 975 $ 7,891 Ending allowance balance for loans individually evaluated for impairment $ — $ — $ — $ — $ — $ — $ 304 $ 304 Ending allowance balance for loans acquired with deteriorated credit quality — — — — — — — — Ending allowance balance for loans collectively evaluated for impairment $ 945 $ 60 $ 1,287 $ 332 $ 3,599 $ 693 $ 671 $ 7,587 Loans receivable: Balance of loans individually evaluated for impairment $ 182 $ — $ 1,136 $ — $ 640 $ — $ 1,086 $ 3,044 Balance of loans acquired with deteriorated credit quality 285 4,161 1,486 1,012 2,087 1,329 4 10,364 Balance of loans collectively evaluated for impairment 157,200 19,677 274,300 50,271 534,637 134,063 75,223 1,245,371 Total period-end balance $ 157,667 $ 23,838 $ 276,922 $ 51,283 $ 537,364 $ 135,392 $ 76,313 $ 1,258,779 December 31, 2016 Construction & Development Farmland 1-4 Family Multifamily Commercial Real Estate Commercial & Industrial Consumer Total Allowance for loan losses: Beginning balance $ 644 $ 22 $ 1,213 $ 246 $ 2,156 $ 513 $ 1,334 $ 6,128 Charge-offs (27 ) — (57 ) — (526 ) — (618 ) (1,228 ) Recoveries 14 — 13 — 1 20 24 72 Provision (52 ) 38 208 109 868 226 682 2,079 Ending balance $ 579 $ 60 $ 1,377 $ 355 $ 2,499 $ 759 $ 1,422 $ 7,051 Ending allowance balance for loans individually evaluated for impairment $ — $ — $ — $ — $ — $ 136 $ 287 $ 423 Ending allowance balance for loans collectively evaluated for impairment $ 579 $ 60 $ 1,377 $ 355 $ 2,499 $ 623 $ 1,135 $ 6,628 Ending allowance balance for loans acquired with deteriorated credit quality $ — $ — $ — $ — $ — $ — $ — $ — Loans receivable: Balance of loans individually evaluated for impairment $ 645 $ — $ 1,673 $ — $ 608 $ 443 $ 1,008 $ 4,377 Balance of loans collectively evaluated for impairment 90,092 8,207 175,532 42,759 380,108 84,934 107,417 889,049 Total period-end balance $ 90,737 $ 8,207 $ 177,205 $ 42,759 $ 380,716 $ 85,377 $ 108,425 $ 893,426 Balance of loans acquired with deteriorated credit quality $ 660 $ — $ 494 $ 1,022 $ — $ — $ — $ 2,176
Schedule of Aging Analysis of Loans	The following tables contain information on the Company’s impaired loans, which include troubled debt restructurings (“TDR”), discussed in more detail below, and nonaccrual loans individually evaluated for impairment for purposes of determining the allowance for loan losses. The average balances are calculated based on the month-end balances of the loans during the period reported (dollars in thousands). As of and for the year ended December 31, 2018 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized With no related allowance recorded: Construction and development $ 339 $ 359 $ — $ 237 $ 13 1-4 Family 1,177 1,180 — 1,455 39 Commercial real estate 761 777 — 878 20 Total mortgage loans on real estate 2,277 2,316 — 2,570 72 Commercial and industrial 76 77 — 278 — Consumer 215 237 — 410 — Total 2,568 2,630 — 3,258 72 With related allowance recorded: Consumer 701 738 236 588 — Total 701 738 236 588 — Total loans: Construction and development 339 359 — 237 13 1-4 Family 1,177 1,180 — 1,455 39 Commercial real estate 761 777 — 878 20 Total mortgage loans on real estate 2,277 2,316 — 2,570 72 Commercial and industrial 76 77 — 278 — Consumer 916 975 236 998 — Total $ 3,269 $ 3,368 $ 236 $ 3,846 $ 72 As of and for the year ended December 31, 2017 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized With no related allowance recorded: Construction and development $ 182 $ 202 $ — $ 338 $ 13 1-4 Family 1,136 1,169 — 1,344 76 Commercial real estate 640 654 — 620 46 Total mortgage loans on real estate 1,958 2,025 — 2,302 135 Commercial and industrial — — — 122 — Consumer 168 217 — 380 1 Total 2,126 2,242 — 2,804 136 With related allowance recorded: Consumer 918 956 304 738 1 Total 918 956 304 738 1 Total loans: Construction and development 182 202 — 338 13 1-4 Family 1,136 1,169 — 1,344 76 Commercial real estate 640 654 — 620 46 Total mortgage loans on real estate 1,958 2,025 — 2,302 135 Commercial and industrial — — — 122 — Consumer 1,086 1,173 304 1,118 2 Total $ 3,044 $ 3,198 $ 304 $ 3,542 $ 137 As of and for the year ended December 31, 2016 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized With no related allowance recorded: Construction and development $ 645 $ 661 $ — $ 1,024 $ 90 1-4 Family 1,673 1,701 — 1,910 66 Commercial real estate 608 623 — 1,742 7 Total mortgage loans on real estate 2,926 2,985 — 4,676 163 Commercial and industrial 15 16 — 1,509 — Consumer 153 166 — 399 11 Total 3,094 3,167 — 6,584 174 With related allowance recorded: Commercial and industrial 428 430 136 144 — Consumer 855 873 287 506 6 Total 1,283 1,303 423 650 6 Total loans: Construction and development 645 661 — 1,024 90 1-4 Family 1,673 1,701 — 1,910 66 Commercial real estate 608 623 — 1,742 7 Total mortgage loans on real estate 2,926 2,985 — 4,676 163 Commercial and industrial 443 446 136 1,653 — Consumer 1,008 1,039 287 905 17 Total $ 4,377 $ 4,470 $ 423 $ 7,234 $ 180
Summary of TDR Pre- and Post-modification Outstanding Recorded Investments by Loan Categories	The table below presents the TDR pre- and post-modification outstanding recorded investments by loan categories for loans modified during the years ended December 31, 2018 and 2017 (dollars in thousands). December 31, 2018 December 31, 2017 Troubled debt restructurings Number of Contracts Pre- Modification Outstanding Recorded Investment Post- Modification Outstanding Recorded Investment Number of Contracts Pre- Modification Outstanding Recorded Investment Post- Modification Outstanding Recorded Investment Construction and development 2 $ 403 $ 403 — $ — $ — 1-4 Family 8 587 587 — — — Commercial and industrial 2 12 12 — — — Consumer — — — 1 5 5 $ 1,002 $ 1,002 $ 5 $ 5
Summary of Accruing and Nonaccrual TDRs and Related Loan Losses by Portfolio Type	The following is a summary of accruing and nonaccrual TDRs and the related loan losses by portfolio type as of the dates presented (dollars in thousands). TDRs Accruing Nonaccrual Total Related Allowance December 31, 2018 Construction and development $ 239 $ 284 $ 523 $ — 1-4 Family 919 190 1,109 — Commercial real estate 78 468 546 — Commercial and industrial 12 — 12 — Total $ 1,248 $ 942 $ 2,190 $ — December 31, 2017 Construction and development $ 154 $ — $ 154 $ — 1-4 Family 889 — 889 — Commercial and industrial 573 — 573 — Consumer 5 — 5 — Total $ 1,621 $ — $ 1,621 $ —
Summary of Average Recorded Investment and Interest Income Recognized for TDRs	The table below includes the average recorded investment and interest income recognized for TDRs for the years ended December 31, 2018 , 2017 and 2016 (dollars in thousands). TDRs Average Recorded Investment Interest Income Recognized December 31, 2018 Construction and development $ 308 $ 13 1-4 Family 948 45 Commercial real estate 553 20 Commercial and industrial 8 — Consumer 2 — Total $ 1,819 $ 78 December 31, 2017 Construction and development $ 159 $ 13 1-4 Family 1,255 76 Commercial real estate 592 46 Consumer 2 2 Total $ 2,008 $ 137 December 31, 2016 Construction and development $ 171 $ 13 1-4 Family 1,614 66 Commercial real estate 617 7 Total $ 2,402 $ 86

OTHER REAL ESTATE OWNED (Tables

OTHER REAL ESTATE OWNED (Tables)	12 Months Ended
	Dec. 31, 2018
Real Estate [Abstract]
Schedule of Activity in Other Real Estate Owned	The table below shows the activity in other real estate owned for the periods presented (dollars in thousands). December 31, 2018 2017 Balance, beginning of period $ 3,837 $ 4,065 Additions 496 42 Acquired other real estate owned — 477 Sales of other real estate owned (155 ) (564 ) Write-downs (567 ) (183 ) Balance, end of period $ 3,611 $ 3,837

BANK PREMISES AND EQUIPMENT (Ta

BANK PREMISES AND EQUIPMENT (Tables)	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Summary of Bank Premises and Equipment	Bank premises and equipment consisted of the following as of the dates indicated (dollars in thousands). December 31, 2018 2017 Land $ 10,820 $ 10,476 Buildings and improvements 28,147 25,750 Furniture and equipment 8,832 7,419 Software 1,329 812 Construction-in-progress 999 908 Less: Accumulated depreciation and amortization (9,898 ) (7,825 ) Bank premises and equipment, net $ 40,229 $ 37,540

GOODWILL AND OTHER INTANGIBLE_2

GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Core Deposit Intangible Assets Activity	The table below shows a summary of the core deposit intangible assets as of the dates presented (dollars in thousands). December 31, 2018 2017 Gross carrying amount $ 3,097 $ 3,097 Accumulated amortization (834 ) (357 ) Net carrying amount $ 2,263 $ 2,740
Finite-lived Intangible Assets, Future Amortization Expense	The future amortization schedule for the Company’s core deposit intangible assets is displayed in the table below. The weighted average amortization period remaining for core deposit intangibles is 8.7 years . (dollars in thousands) 2019 $ 432 2020 387 2021 342 2022 297 2023 252 Thereafter 553 $ 2,263

DEPOSITS (Tables)

DEPOSITS (Tables)	12 Months Ended
	Dec. 31, 2018
Banking and Thrift [Abstract]
Summary of Deposits	Deposits consisted of the following as of the dates presented (dollars in thousands). December 31, 2018 2017 Noninterest-bearing demand deposits $ 217,457 $ 216,599 Interest-bearing demand deposits 295,212 208,683 Money market deposit accounts 179,340 146,140 Savings accounts 104,146 117,372 Time deposits 565,576 536,443 Total deposits $ 1,361,731 $ 1,225,237
Summary of Outstanding Time Deposits	The table below summarizes outstanding time deposits as of the dates indicated (dollars in thousands). December 31, 2018 2017 $0 to $99,999 $ 229,105 $ 252,636 $100,000 to $249,999 236,031 203,966 $250,000 and above 100,440 79,841 $ 565,576 $ 536,443
Schedule of Contractual Maturities of Time Deposits 100000 or More Outstanding	The contractual maturities of time deposits of $100,000 or more outstanding are summarized in the table below as of the dates presented (dollars in thousands). December 31, 2018 2017 Time remaining until maturity: Three months or less $ 77,923 $ 81,844 Over three through six months 72,397 55,411 Over six through twelve months 102,055 63,183 Over one year through three years 72,524 80,160 Over three years 11,572 3,209 $ 336,471 $ 283,807
Schedule of Maturities of Time Deposits	The approximate scheduled maturities of time deposits for each of the next five years are shown below (dollars in thousands). 2019 $ 412,824 2020 111,891 2021 22,944 2022 9,754 2023 8,163 $ 565,576

OTHER BORROWED FUNDS (Tables)

OTHER BORROWED FUNDS (Tables)	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Summary of Maturities and Weighted-Average Rate of FHLB Advances by Year of Maturity	FHLB advances and weighted average interest rates at the end of the period by contractual maturity are summarized as of the dates presented (dollars in thousands). Amount Weighted Average Rate December 31, 2018 December 31, 2017 December 31, 2018 December 31, 2017 Fixed rate advances maturing: 2018 $ — $ 126,600 — % 1.42 % 2019 148,400 12,000 2.46 1.46 2020 3,100 3,100 1.52 1.52 2027 — 25,000 — 1.06 2028 25,000 — 1.77 — 2033 30,000 — 1.88 — ASC 805 Fair Value Adjustment (10 ) (42 ) — — $ 206,490 $ 166,658 2.28 % 1.37 %
Schedule of Junior Subordinated Debentures	The following table provides a summary of the Company’s junior subordinated debentures (dollars in thousands). Face Value Carrying Value Maturity Date Variable Interest Rate Interest Rate at December 31, 2018 First Community Louisiana Statutory Trust I $ 3,609 $ 3,609 June 2036 3-month LIBOR + 1.77% 4.56 % BOJ Bancshares Statutory Trust I 3,093 2,236 December 2034 3-month LIBOR + 1.90% 4.69 % $ 6,702 $ 5,845

STOCKHOLDERS' EQUITY (Tables)

STOCKHOLDERS' EQUITY (Tables)	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
AOCI Activity	Activity within the balances in accumulated other comprehensive income (loss), net is shown in the tables below (dollars in thousands). For the years ended December 31, 2018 2017 2016 Beginning of Period Net Change End of Period Beginning of Period Net Change End of Period Beginning of Period Net Change End of Period Unrealized gain (loss), available for sale, net $ (71 ) $ (1,576 ) $ (1,647 ) $ (401 ) $ 330 $ (71 ) $ 1,099 $ (1,500 ) $ (401 ) Reclassification of realized gain, net (1,914 ) (11 ) (1,925 ) (1,683 ) (231 ) (1,914 ) (1,396 ) (287 ) (1,683 ) Unrealized loss, transfer from available for sale to held to maturity, net 7 (2 ) 5 8 (1 ) 7 12 (4 ) 8 Change in fair value of interest rate swap designated as a cash flow hedge, net 407 84 491 5 402 407 (378 ) 383 5 Accumulated other comprehensive income (loss) $ (1,571 ) $ (1,505 ) $ (3,076 ) $ (2,071 ) $ 500 $ (1,571 ) $ (663 ) $ (1,408 ) $ (2,071 )

STOCK-BASED COMPENSATION (Table

STOCK-BASED COMPENSATION (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Warrants Activity	The following table summarizes the Company’s warrant activity for the periods indicated. December 31, 2018 2017 2016 $13.33 Per Share Issued October 1, 2011, expired July 1, 2018 Balance, beginning of period 64,425 124,275 130,875 Issued — — — Forfeited — — — Exercised (64,425 ) (59,850 ) (6,600 ) Balance, end of period — 64,425 124,275
Schedule of Stock Option Activity	The table below summarizes the Company’s stock option activity for the periods indicated. Stock Options Shares Weighted Average Price Weighted Average Remaining Contractual Term (Years) Outstanding at December 31, 2015 278,352 $ 14.37 8.42 Issued 46,512 14.28 Forfeited — — Exercised (5,500 ) 14.00 Outstanding at December 31, 2016 319,364 14.36 7.67 Issued 36,177 20.25 Forfeited (5,334 ) 14.00 Exercised (27,290 ) 13.70 Outstanding at December 31, 2017 322,917 15.09 7.19 Issued 31,788 20.25 Forfeited (1,644 ) 14.00 Exercised (12,415 ) 14.07 Outstanding at December 31, 2018 340,646 15.98 6.49 Exercisable at December 31, 2018 162,268 14.70 6.03
Schedule of Assumptions Used for Option Awards Granted	The table below shows the assumptions used for the stock options granted during the years ended December 31, 2018 and 2017 . 2018 2017 Dividend yield 0.52 % 0.22 % Expected volatility 24.99 % 20.46 % Risk-free interest rate 2.68 % 2.19 % Expected term (in years) 6.5 7 Weighted-average grant date fair value $ 7.16 $ 5.39
Time Vested Restricted Stock Award Activity	The following table summarizes the unvested restricted stock award activity for the years ended December 31, 2018 and December 31, 2017 . December 31, 2018 2017 Shares Weighted Avg Grant Date Fair Value Shares Weighted Avg Grant Date Fair Value Balance, beginning of period 112,688 $ 17.28 93,366 $ 14.75 Granted 60,260 24.01 54,724 20.18 Forfeited (3,441 ) 20.73 (8,802 ) 15.97 Earned and issued (33,659 ) 16.75 (26,600 ) 14.78 Balance, end of period 135,848 $ 20.47 112,688 $ 17.28

INCOME TAXES (Tables)

INCOME TAXES (Tables)	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Summary of Expense for Income Taxes Included in Consolidated Statement of Operations	The income tax expense included in the consolidated statements of income is displayed in the table below for the years ended December 31, 2018 , 2017 and 2016 (dollars in thousands). December 31, 2018 2017 2016 Current $ 2,789 $ 4,003 $ 3,816 Deferred 841 245 (207 ) Total income tax expense $ 3,630 $ 4,248 $ 3,609
Summary of Provision for Federal Income Taxes Differs from that Computed by Applying the Federal Statutory Rate	The provision for federal income taxes differs from that computed by applying the federal statutory rate of 21% in 2018 , and 35% in 2017 and 2016 , as indicated in the following analysis for the years ended December 31, 2018 , 2017 and 2016 (dollars in thousands). December 31, 2018 2017 2016 Tax based on statutory rate $ 3,619 $ 4,258 $ 3,921 Increase (decrease) resulting from: Effect of tax-exempt income (249 ) (422 ) (273 ) Acquisition costs 29 174 — Historical tax credits 6 10 10 Effect of tax rate change 338 292 — Other (113 ) (64 ) (49 ) Total income tax expense $ 3,630 $ 4,248 $ 3,609 Effective rate 21.1 % 34.1 % 31.4 %
Summary of Deferred Tax Assets and Liabilities	The net deferred tax asset was comprised of the following items as of the dates indicated (dollars in thousands). December 31, 2018 2017 2016 Deferred tax liabilities: Depreciation $ (2,515 ) $ (1,652 ) $ (1,650 ) FHLB stock dividend (79 ) (28 ) (20 ) Basis difference in acquired assets and liabilities (785 ) (900 ) (276 ) Other (20 ) (20 ) — Gross deferred tax liability (3,399 ) (2,600 ) (1,946 ) Deferred tax assets: Allowance for loan losses 1,915 1,549 2,150 Provision for other real estate losses 274 155 266 Unrealized loss on available for sale securities 818 418 1,115 Net operating loss carryforward 128 154 299 Deferred compensation 225 302 25 Basis difference in acquired assets and liabilities 442 839 253 Historical tax credit 160 144 243 Employee and director stock awards 306 208 234 Other 276 125 229 Gross deferred tax assets 4,544 3,894 4,814 Net deferred tax asset $ 1,145 $ 1,294 $ 2,868

FAIR VALUES OF FINANCIAL INST_2

FAIR VALUES OF FINANCIAL INSTRUMENTS (Tables)	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis	Assets and liabilities measured at fair value on a recurring basis are summarized below as of the dates indicated (dollars in thousands). Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) December 31, 2018 Assets: Obligations of U.S. government agencies and corporations $ 7,870 $ — $ 7,870 $ — Obligations of state and political subdivisions 33,986 — 15,178 18,808 Corporate bonds 15,509 — 14,174 1,335 Residential mortgage-backed securities 134,927 — 134,927 — Commercial mortgage-backed securities 56,689 — 56,689 — Equity securities 1,699 1,699 — — Derivative financial instruments 622 — 622 — Total assets $ 251,302 $ 1,699 $ 229,460 $ 20,143 December 31, 2017 Assets: Obligations of U.S. government agencies and corporations $ 8,168 $ — $ 8,168 $ — Obligations of state and political subdivisions 35,237 — 15,694 19,543 Corporate bonds 16,210 — 14,885 1,325 Residential mortgage-backed securities 109,478 — 109,478 — Commercial mortgage-backed securities 47,629 — 47,629 — Equity securities 842 842 — — Derivative financial instruments 516 — 516 — Total assets $ 218,080 $ 842 $ 196,370 $ 20,868
Summary of Assets Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs	The table below provides a reconciliation for assets measured at fair value on a recurring basis using significant unobservable inputs, or level 3 inputs (dollars in thousands). Obligations of State and Political Subdivisions Corporate Bonds Total Balance at December 31, 2016 $ 17,656 $ 624 $ 18,280 Realized gains (losses) included in net income — — — Unrealized gains included in other comprehensive income 1,265 1 1,266 Purchases — 700 700 Acquired 622 — 622 Sales — — — Maturities, prepayments, and calls — — — Transfers into Level 3 — — — Transfers out of Level 3 — — — Balance at December 31, 2017 $ 19,543 $ 1,325 $ 20,868 Realized gains (losses) included in net income — — — Unrealized (losses) gains included in other comprehensive income (628 ) 10 (618 ) Purchases — — — Sales — — — Maturities, prepayments, and calls (107 ) — (107 ) Transfers into Level 3 — — — Transfers out of Level 3 — — — Balance at December 31, 2018 $ 18,808 $ 1,335 $ 20,143
Summary of Assets Measured at Fair Value on a Nonrecurring Basis	Quantitative information about assets measured at fair value on a nonrecurring basis based on significant unobservable inputs (level 3) are summarized below as of the dates indicated; there were no liabilities measured on a nonrecurring basis at December 31, 2018 or 2017 (dollars in thousands). Estimated Fair Value Valuation Technique Unobservable Inputs Range of Discounts Weighted Average Discount December 31, 2018 Impaired loans $ 383 Discounted cash flows, Underlying collateral value Collateral discounts and estimated costs to sell 0% - 100% 15% Other real estate owned 3,270 Underlying collateral value, Third party appraisals Collateral discounts and discount rates 15% 15% December 31, 2017 Impaired loans $ 380 Discounted cash flows, Underlying collateral value Collateral discounts and estimated costs to sell 0% - 100% 32% Other real estate owned 3,612 Underlying collateral value, Third party appraisals Collateral discounts and discount rates 5% 5%
Summary of Estimated Fair Values of Company's Financial Instruments	The estimated fair values of the Company’s financial instruments at December 31, 2018 and December 31, 2017 are shown below (dollars in thousands). December 31, 2018 Carrying Amount Estimated Fair Value Level 1 Level 2 Level 3 Financial assets: Cash and due from banks $ 17,134 $ 17,134 $ 17,134 $ — $ — Federal funds sold 6 6 6 — — Investment securities 265,047 264,786 — 234,053 30,733 Equity securities 13,562 13,562 1,699 11,863 — Loans, net of allowance 1,391,371 1,374,292 — — 1,374,292 Derivative financial instruments 622 622 — 622 — Financial liabilities: Deposits, noninterest-bearing $ 217,457 $ 217,457 $ — $ 217,457 $ — Deposits, interest-bearing 1,144,274 1,095,639 — — 1,095,639 FHLB short-term advances and repurchase agreements 205,399 205,399 — 205,399 — FHLB long-term advances 3,090 2,712 — — 2,712 Junior subordinated debt 5,845 7,420 — — 7,420 Subordinated debt 18,600 19,187 — 19,187 — December 31, 2017 Carrying Amount Estimated Fair Value Level 1 Level 2 Level 3 Financial assets: Cash and due from banks $ 30,421 $ 30,421 $ 30,421 $ — $ — Investment securities 235,561 235,511 842 201,946 32,723 Equity securities 9,798 9,799 — 9,799 — Loans, net of allowance 1,250,888 1,249,844 — — 1,249,844 Derivative financial instruments 516 516 — 516 — Financial liabilities: Deposits, noninterest-bearing $ 216,599 $ 216,599 $ — $ 216,599 $ — Deposits, interest-bearing 1,008,638 977,127 — — 977,127 FHLB short-term advances and repurchase agreements 148,535 148,535 — 148,535 — FHLB long-term advances 40,058 39,927 — — 39,927 Junior subordinated debt 5,792 5,576 — — 5,576 Subordinated debt 18,600 18,857 — 18,857 —

REGULATORY MATTERS (Tables)

REGULATORY MATTERS (Tables)	12 Months Ended
	Dec. 31, 2018
Banking and Thrift [Abstract]
Summary of Actual Capital Amounts and Ratios	The Company’s and the Bank’s actual capital amounts and ratios as of December 31, 2018 and December 31, 2017 are presented in the tables below (dollars in thousands). Actual Capital Adequacy Well Capitalized Amount Ratio Amount Ratio Amount Ratio December 31, 2018 Tier 1 leverage capital Investar Holding Corporation $ 172,050 9.81 % $ 70,121 4.00 % NA NA Investar Bank 187,735 10.72 70,056 4.00 87,570 5.00 Common Equity Tier 1 risk-based capital Investar Holding Corporation 165,550 11.15 66,800 4.50 NA NA Investar Bank 187,735 12.67 66,703 4.50 96,349 6.50 Tier 1 risk-based capital Investar Holding Corporation 172,050 11.59 89,066 6.00 NA NA Investar Bank 187,735 12.67 88,937 6.00 118,583 8.00 Total risk-based capital Investar Holding Corporation 199,786 13.46 118,755 8.00 NA NA Investar Bank 197,256 13.31 118,583 8.00 148,229 10.00 December 31, 2017 Tier 1 leverage capital Investar Holding Corporation $ 161,438 10.66 % $ 60,579 4.00 % NA NA Investar Bank 175,943 11.63 60,534 4.00 75,668 5.00 Common Equity Tier 1 risk-based capital Investar Holding Corporation 154,938 11.75 59,352 4.50 NA NA Investar Bank 175,943 13.35 59,294 4.50 85,647 6.50 Tier 1 risk-based capital Investar Holding Corporation 161,438 12.24 79,136 6.00 NA NA Investar Bank 175,943 13.35 79,059 6.00 105,411 8.00 Total risk-based capital Investar Holding Corporation 187,530 14.22 105,514 8.00 NA NA Investar Bank 183,867 13.95 105,411 8.00 131,764 10.00
Summary of Thresholds Established for Institution to be Deemed Adequately Capitalized	The following thresholds have been established for an institution to be deemed well-capitalized: Total Risk-Based Capital Ratio 10.0 % Tier 1 Risk-Based Capital Ratio 8.0 % Common Equity Tier 1 Capital Ratio 6.5 % Tier 1 Leverage Ratio 5.0 %

COMMITMENTS AND CONTINGENCIES (

COMMITMENTS AND CONTINGENCIES (Tables)	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Summary of Commitments to Extend Credit	The table below shows the approximate amounts of the Company’s commitments to extend credit as of the dates presented (dollars in thousands). December 31, 2018 December 31, 2017 Loan commitments $ 263,002 $ 174,278 Standby letters of credit 11,114 3,832
Schedule of Future Minimum Rental Payments for Operating Leases	Future minimum lease payments due under non-cancelable operating leases at December 31, 2018 were as follows (dollars in thousands): 2019 $ 80 2020 120 2021 120 2022 120 2023 120 Thereafter 890 $ 1,450

PARENT ONLY BALANCE SHEETS, S_2

PARENT ONLY BALANCE SHEETS, STATEMENTS OF OPERATIONS AND STATEMENTS OF CASH FLOWS (Tables)	12 Months Ended
	Dec. 31, 2018
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Parent Company Balance Sheets	BALANCE SHEETS December 31, (dollars in thousands) 2018 2017 ASSETS Cash and due from bank $ 604 $ 2,134 Equity securities 1,232 364 Accounts receivable 26 27 Due from bank subsidiary 451 759 Investment in bank subsidiary 204,347 193,654 Investment in trust 202 202 Investment in tax credit entity 169 169 Trademark intangible 100 100 Deferred tax asset 52 — Other assets 81 24 Total assets $ 207,264 $ 197,433 LIABILITIES Subordinated debt, net of unamortized issuance costs $ 18,215 $ 18,168 Junior subordinated debt 5,845 5,792 Accounts payable 124 95 Accrued interest payable 292 290 Dividend payable 484 312 Due to bank subsidiary 42 — Deferred tax liability — 47 Total liabilities 25,002 24,704 STOCKHOLDERS’ EQUITY Common stock 9,484 9,515 Surplus 130,133 131,582 Retained earnings 45,721 33,203 Accumulated other comprehensive loss (3,076 ) (1,571 ) Total stockholders’ equity 182,262 172,729 Total liabilities and stockholders’ equity $ 207,264 $ 197,433
Parent Company Statements of Operations	STATEMENTS OF OPERATIONS For the year ended For the year ended December 31, (dollars in thousands) 2018 2017 Revenue Dividends received from bank subsidiary $ 4,000 $ 50,200 Dividends on corporate stock 6 6 Gain on sale of equity securities, net — 52 Change in the fair value of equity securities (265 ) — Interest income from investment in trust 8 4 Total revenue 3,749 50,262 Expense Interest on borrowings 1,486 1,017 Management fees to bank subsidiary 335 310 Acquisition expense 39 452 Other expense 454 449 Total expense 2,314 2,228 Income before income taxes and equity in undistributed income of bank subsidiary 1,435 48,034 Equity in undistributed income (loss) of bank subsidiary 11,644 (40,606 ) Income tax benefit 527 774 Net income $ 13,606 $ 8,202
Parent Company Statements of Cash Flows	STATEMENTS OF CASH FLOWS For the year ended December 31, (dollars in thousands) 2018 2017 CASH FLOWS FROM OPERATING ACTIVITIES Net income $ 13,606 $ 8,202 Adjustments to reconcile net loss to net cash provided by operating activities: Equity in undistributed loss (earnings) of bank subsidiary (11,644 ) 40,606 Gain on sale of available for sale securities — (52 ) Change in the fair value of equity securities 265 — Amortization of debt costs and purchase accounting adjustments 100 40 Net change in: Due from bank subsidiary 307 (494 ) Other assets (13 ) 36 Deferred tax asset (99 ) (22 ) Accrued other liabilities 890 890 Net cash provided by operating activities 3,412 49,206 CASH FLOWS FROM INVESTING ACTIVITIES Capital contributed to bank subsidiary — (48,400 ) Purchases of equity securities (2,189 ) (492 ) Proceeds from the sale of equity securities 1,047 409 Cash paid for acquisitions, net of cash acquired — (49,213 ) Net cash used in investing activities (1,142 ) (97,696 ) CASH FLOWS FROM FINANCING ACTIVITIES Repayment of borrowings — (1,000 ) Cash dividends paid on common stock (1,468 ) (722 ) Proceeds from issuance of common stock in a public offering, net of issuance costs — 32,509 Payment to repurchase common stock (3,368 ) (506 ) Proceeds from stock options and warrants exercised 1,036 1,172 Proceeds from subordinated debt, net of costs — 18,133 Net cash provided by (used in) financing activities (3,800 ) 49,586 Net decrease in cash (1,530 ) 1,096 Cash and cash equivalents, beginning of period 2,134 1,038 Cash and cash equivalents, end of period $ 604 $ 2,134 SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION: Cash payments for: Interest on borrowings $ 1,484 $ 732

EARNINGS PER SHARE (Tables)

EARNINGS PER SHARE (Tables)	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Computation of Basic and Diluted Earnings Per Common Share	The following is a summary of the information used in the computation of basic and diluted earnings per common share for the years ended December 31, 2018 , 2017 and 2016 (in thousands, except share data). December 31, 2018 2017 2016 Earnings per common share - basic Net income allocated to common shareholders $ 13,414 $ 8,092 $ 7,880 Weighted-average basic shares outstanding 9,538,891 8,399,584 7,107,187 Basic earnings per common share $ 1.41 $ 0.96 $ 1.11 Earnings per common share - diluted Net income allocated to common shareholders $ 13,417 $ 8,092 $ 7,880 Weighted-average basic shares outstanding 9,538,891 8,399,584 7,107,187 Dilutive effect of securities 125,952 57,344 42,647 Total weighted average diluted shares outstanding 9,664,843 8,456,928 7,149,834 Diluted earnings per common share $ 1.39 $ 0.96 $ 1.10
Antidilutive Securities Excluded from Computation of Earnings Per Share	The weighted average number of shares that have an antidilutive effect in the calculation of diluted earnings per common share and have been excluded from the computations above are shown below. December 31, 2018 2017 2016 Stock options 6,306 5,235 10,069 Restricted stock 1,364 1,880 1,737

QUARTERLY RESULTS OF OPERATIO_2

QUARTERLY RESULTS OF OPERATIONS (UNAUDITED) (Tables)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Summary of Quarterly Results of Operations	(dollars in thousands, except per share data) First Quarter Second Quarter Third Quarter Fourth Quarter Year ended December 31, 2018 Total interest income $ 17,178 $ 18,009 $ 18,777 $ 19,927 Total interest expense 3,320 3,689 4,392 5,120 Net interest income 13,858 14,320 14,385 14,807 Provision for loan losses 625 567 785 593 Net interest income after provision for loan losses 13,233 13,753 13,600 14,214 Gain (loss) on sale of investment securities — 22 15 (23 ) Other noninterest income 1,072 1,171 1,202 859 Noninterest expense 10,562 10,160 10,254 10,906 Income before income taxes 3,743 4,786 4,563 4,144 Income tax expense 1,341 966 516 807 Net income $ 2,402 $ 3,820 $ 4,047 $ 3,337 Earnings per common share - basic $ 0.25 $ 0.39 $ 0.42 $ 0.35 Earnings per common share - diluted $ 0.25 $ 0.39 $ 0.41 $ 0.34 (dollars in thousands, except per share data) First Quarter Second Quarter Third Quarter Fourth Quarter Year ended December 31, 2017 Total interest income $ 11,093 $ 11,844 $ 14,442 $ 15,967 Total interest expense 2,233 2,542 2,904 3,150 Net interest income 8,860 9,302 11,538 12,817 Provision for loan losses 350 375 420 395 Net interest income after provision for loan losses 8,510 8,927 11,118 12,422 Gain on sale of investment securities 106 109 27 50 Other noninterest income 779 692 1,140 912 Noninterest expense 6,684 6,928 9,122 9,608 Income before income taxes 2,711 2,800 3,163 3,776 Income tax expense 847 877 1,032 1,492 Net income $ 1,864 $ 1,923 $ 2,131 $ 2,284 Earnings per common share - basic $ 0.26 $ 0.22 $ 0.24 $ 0.25 Earnings per common share - diluted $ 0.26 $ 0.22 $ 0.24 $ 0.25

SUMMARY OF SIGNIFICANT ACCOUN_3

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Accounting Policies Narrative (Details)	Oct. 31, 2018USD ($)	Dec. 31, 2018USD ($)segment	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Accounting Policies [Abstract]
Number of reportable operating segments | segment		1
Finite-Lived Intangible Assets [Line Items]
Equity securities in correspondent banks		$ 11,900,000	$ 9,800,000
Equity securities		248,981,000	217,564,000
Reserve for unfunded loan commitments		66,000	32,000
Impairment charges	$ 0	$ 0
Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life of property, plant and equipment		1 year
Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life of property, plant and equipment		39 years
Servicing Contracts
Finite-Lived Intangible Assets [Line Items]
Income earned from servicing activities		$ 600,000	$ 1,000,000	$ 1,600,000
Core Deposits | Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life of core deposit intangibles		10 years
Core Deposits | Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life of core deposit intangibles		15 years
Corporate bonds
Finite-Lived Intangible Assets [Line Items]
Equity securities		$ 1,700,000

SUMMARY OF SIGNIFICANT ACCOUN_4

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Tax Cuts and Jobs Act and Impact of New Accounting Pronouncements (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2018		Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification of tax effects of the Tax Cuts and Jobs Act	$ 600	$ 300	$ 557	[1]
Excess tax benefit					$ 100
Equity securities			1,400
Accounting Standards Update 2016-01
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Equity securities	$ 1,400
Exchange Traded Funds | Accounting Standards Update 2016-01
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Fair value of cost method investments			$ 1,700
ASU 2018-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification of tax effects of the Tax Cuts and Jobs Act					$ 300
[1]	The $0.6 million adjustment to retained earnings for the period ended December 31, 2018 represents a reclassification of the tax effects of the TCJA.

SUMMARY OF SIGNIFICANT ACCOUN_5

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Recent Accounting Pronouncements (Details) - Accounting Standards Update 2016-02 - Scenario, Forecast - Subsequent Event $ in Millions	Jan. 01, 2019USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use asset	$ 1.2
Lease liability	$ 1.2

BUSINESS COMBINATIONS - Additio

BUSINESS COMBINATIONS - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	Dec. 01, 2017	Jul. 01, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Tax-affected amounts of acquisition expenses				$ 2,200
Interest income of acquiree since acquisition date			$ 13,500
Noninterest income of acquiree since acquisition date			1,600
Net income of acquiree since acquisition date			3,000
Acquisition expense			1,445	1,868	$ 0
Citizens Bancshares, Inc.
Business Acquisition [Line Items]
Percentage of common stock acquired		100.00%
Cash consideration		$ 45,800
Purchase price per share (in dollars per share)		$ 419.20
Goodwill		$ 9,053	9,100
Assets		250,650
Net loans		129,181
Deposits		212,228
Core deposit intangible		$ 1,462		1,500
Acquisition expense			1,400	1,900
BOJ Bancshares, Inc.
Business Acquisition [Line Items]
Percentage of common stock acquired	100.00%
Cash consideration	$ 3,950
Goodwill	$ 5,687		5,700
Merger consideration, aggregate shares of common stock (in shares)	799,559
Total consideration transferred	$ 22,700
Total adjustments			$ (300)
Assets	152,143
Net loans	102,393
Deposits	125,788
Core deposit intangible	$ 1,018			$ 1,000

BUSINESS COMBINATIONS - Schedul

BUSINESS COMBINATIONS - Schedule Of Recognized Identified Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	Dec. 01, 2017	Jul. 01, 2017	Dec. 31, 2018	Dec. 31, 2017
Citizens Bancshares, Inc.
Purchase price:
Cash paid		$ 45,800
Fair value of assets acquired:
Cash and cash equivalents		44,565
Investment securities		69,912
Loans		129,181
Bank premises and equipment		3,307
Core deposit intangible asset		1,462		$ 1,500
Other assets		2,223
Total assets acquired		250,650
Fair value of liabilities acquired:
Deposits		212,228
Other liabilities		1,675
Total liabilities assumed		213,903
Fair value of net assets acquired		36,747
Goodwill		$ 9,053	$ 9,100
BOJ Bancshares, Inc.
Purchase price:
Cash paid	$ 3,950
Common stock	18,749
Fair value of assets acquired:
Cash and cash equivalents	26,438
Investment securities	16,194
Loans	102,393
Bank premises and equipment	3,725
Core deposit intangible asset	1,018			$ 1,000
Other assets	2,375
Total assets acquired	152,143
Fair value of liabilities acquired:
Deposits	125,788
FHLB advances	5,956
Trust preferred	2,178
Other liabilities	1,209
Total liabilities assumed	135,131
Fair value of net assets acquired	17,012
Goodwill	$ 5,687		$ 5,700

BUSINESS COMBINATIONS - Separat

BUSINESS COMBINATIONS - Separately Recognized Transactions (Detail) - USD ($) $ in Thousands	Dec. 01, 2017	Jul. 01, 2017
Citizens Bancshares, Inc.
Purchase Credit Impaired
Contractually required principal		$ 5,123
Non-accretable difference		(700)
Cash flows expected to be collected		4,423
Accretable yield		0
Fair value of acquired loans		$ 4,423
BOJ Bancshares, Inc.
Purchase Credit Impaired
Contractually required principal	$ 4,557
Non-accretable difference	(671)
Cash flows expected to be collected	3,886
Accretable yield	0
Fair value of acquired loans	$ 3,886

BUSINESS COMBINATIONS - Pro For

BUSINESS COMBINATIONS - Pro Forma Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Business Combinations [Abstract]
Interest income	$ 64,222	$ 58,996
Noninterest income	5,248	7,392
Net income	$ 10,641	$ 11,979

INVESTMENT SECURITIES - Schedul

INVESTMENT SECURITIES - Schedule of Amortized Cost and Approximate Fair Value of Investment Securities Classified as Available for Sale (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Total debt securities	$ 253,504	$ 219,230
Debt securities, fair value	248,981	216,722
Equity securities, fair value	1,400
Amortized Cost	253,504	220,077
Gross Unrealized Gains	517	305
Gross Unrealized Losses	(5,040)	(2,818)
Fair Value	248,981	217,564
Obligations of U.S. government agencies and corporations
Schedule of Available-for-sale Securities [Line Items]
Total debt securities	7,946	8,241
Debt securities, gross unrealized gains	14	8
Debt securities, gross unrealized losses	(90)	(81)
Debt securities, fair value	7,870	8,168
Obligations of state and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Total debt securities	34,875	35,572
Debt securities, gross unrealized gains	6	87
Debt securities, gross unrealized losses	(895)	(422)
Debt securities, fair value	33,986	35,237
Corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Total debt securities	16,166	16,428
Debt securities, gross unrealized gains	53	112
Debt securities, gross unrealized losses	(710)	(330)
Debt securities, fair value	15,509	16,210
Residential mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Total debt securities	136,768	110,690
Debt securities, gross unrealized gains	336	58
Debt securities, gross unrealized losses	(2,177)	(1,270)
Debt securities, fair value	134,927	109,478
Commercial mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Total debt securities	57,749	48,299
Debt securities, gross unrealized gains	108	16
Debt securities, gross unrealized losses	(1,168)	(686)
Debt securities, fair value	$ 56,689	47,629
Equity securities
Schedule of Available-for-sale Securities [Line Items]
Equity securities, amortized cost		847
Equity Securities, gross unrealized gains		24
Equity securities, gross unrealized losses		(29)
Equity securities, fair value		$ 842

INVESTMENT SECURITIES - Sched_2

INVESTMENT SECURITIES - Schedules of Proceeds from Sale of Investment Securities (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Proceeds from sale	$ 7,021	$ 106,448	$ 15,515
Gross gains	35
Gross gains		342	443
Gross losses	$ (21)
Gross losses		$ (50)	$ 0

INVESTMENT SECURITIES - Sched_3

INVESTMENT SECURITIES - Schedule of Amortized Cost and Approximate Fair Value of Investment Securities Classified as Held to Maturity (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Schedule of Held-to-maturity Securities [Line Items]
Total debt securities	$ 16,066	$ 17,997
Gross Unrealized Gains	2	13
Gross Unrealized Losses	(263)	(63)
Fair Value	15,805	17,947
Obligations of state and political subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Total debt securities	10,699	11,861
Gross Unrealized Gains	2	9
Gross Unrealized Losses	(111)	(15)
Fair Value	10,590	11,855
Residential mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Total debt securities	5,367	6,136
Gross Unrealized Gains	0	4
Gross Unrealized Losses	(152)	(48)
Fair Value	$ 5,215	$ 6,092

INVESTMENT SECURITIES - Sched_4

INVESTMENT SECURITIES - Schedule of Unrealized Losses and Fair Value by Investment Category for Securities Available for Sale (Detail) $ in Thousands	Dec. 31, 2018USD ($)security	Dec. 31, 2017USD ($)security
Schedule of Available-for-sale Securities [Line Items]
Count | security	392
Count | security		331
Less than 12 months, fair value	$ 51,002
Less than 12 months, fair value		$ 121,584
Less than 12 months, unrealized losses	(842)
Less than 12 months, unrealized losses		(1,268)
12 months or more, fair value	149,414
12 months or more, fair value		57,812
12 months or more, unrealized losses	(4,198)
12 months or more, unrealized losses		(1,550)
Total, fair value	200,416
Total, fair value		179,396
Total, unrealized losses	$ (5,040)
Total, unrealized losses		$ (2,818)
Obligations of U.S. government agencies and corporations
Schedule of Available-for-sale Securities [Line Items]
Count | security	15
Count | security		14
Less than 12 months, fair value	$ 469
Less than 12 months, fair value		$ 5,815
Less than 12 months, unrealized losses	0
Less than 12 months, unrealized losses		(50)
12 months or more, fair value	5,304
12 months or more, fair value		1,505
12 months or more, unrealized losses	(90)
12 months or more, unrealized losses		(31)
Total, fair value	5,773
Total, fair value		7,320
Total, unrealized losses	$ (90)
Total, unrealized losses		$ (81)
Obligations of state and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Count | security	63
Count | security		57
Less than 12 months, fair value	$ 13,716
Less than 12 months, fair value		$ 12,315
Less than 12 months, unrealized losses	(330)
Less than 12 months, unrealized losses		(77)
12 months or more, fair value	19,270
12 months or more, fair value		9,930
12 months or more, unrealized losses	(565)
12 months or more, unrealized losses		(345)
Total, fair value	32,986
Total, fair value		22,245
Total, unrealized losses	$ (895)
Total, unrealized losses		$ (422)
Corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Count | security	27
Count | security		20
Less than 12 months, fair value	$ 6,793
Less than 12 months, fair value		$ 1,116
Less than 12 months, unrealized losses	(225)
Less than 12 months, unrealized losses		(6)
12 months or more, fair value	5,763
12 months or more, fair value		6,273
12 months or more, unrealized losses	(485)
12 months or more, unrealized losses		(324)
Total, fair value	12,556
Total, fair value		7,389
Total, unrealized losses	$ (710)
Total, unrealized losses		$ (330)
Residential mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Count | security	193
Count | security		159
Less than 12 months, fair value	$ 24,868
Less than 12 months, fair value		$ 71,893
Less than 12 months, unrealized losses	(245)
Less than 12 months, unrealized losses		(729)
12 months or more, fair value	79,517
12 months or more, fair value		28,410
12 months or more, unrealized losses	(1,932)
12 months or more, unrealized losses		(541)
Total, fair value	104,385
Total, fair value		100,303
Total, unrealized losses	$ (2,177)
Total, unrealized losses		$ (1,270)
Commercial mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Count | security	94
Count | security		80
Less than 12 months, fair value	$ 5,156
Less than 12 months, fair value		$ 30,445
Less than 12 months, unrealized losses	(42)
Less than 12 months, unrealized losses		(406)
12 months or more, fair value	39,560
12 months or more, fair value		11,216
12 months or more, unrealized losses	(1,126)
12 months or more, unrealized losses		(280)
Total, fair value	44,716
Total, fair value		41,661
Total, unrealized losses	$ (1,168)
Total, unrealized losses		$ (686)
Equity securities
Schedule of Available-for-sale Securities [Line Items]
Count | security		1
Less than 12 months, fair value		$ 0
Less than 12 months, unrealized losses		0
12 months or more, fair value		478
12 months or more, unrealized losses		(29)
Total, fair value		478
Total, unrealized losses		$ (29)

INVESTMENT SECURITIES - Sched_5

INVESTMENT SECURITIES - Schedule of Unrealized Losses and Fair Value by Investment Category for Securities Held to Maturity (Detail) $ in Thousands	Dec. 31, 2018USD ($)security	Dec. 31, 2017USD ($)security
Schedule of Held-to-maturity Securities [Line Items]
Count | security	10	7
Less than 12 Months, Fair Value	$ 1,761	$ 7,608
Less than 12 Months, Unrealized Losses	(35)	(18)
12 Months or More, Fair Value	8,922	2,522
12 Months or More, Unrealized Losses	(228)	(45)
Total, Fair Value	10,683	10,130
Total, Unrealized Losses	$ (263)	$ (63)
Obligations of state and political subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Count | security	1	1
Less than 12 Months, Fair Value	$ 0	$ 6,007
Less than 12 Months, Unrealized Losses	0	(15)
12 Months or More, Fair Value	5,468	0
12 Months or More, Unrealized Losses	(111)	0
Total, Fair Value	5,468	6,007
Total, Unrealized Losses	$ (111)	$ (15)
Residential mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Count | security	9	6
Less than 12 Months, Fair Value	$ 1,761	$ 1,601
Less than 12 Months, Unrealized Losses	(35)	(3)
12 Months or More, Fair Value	3,454	2,522
12 Months or More, Unrealized Losses	(117)	(45)
Total, Fair Value	5,215	4,123
Total, Unrealized Losses	$ (152)	$ (48)

INVESTMENT SECURITIES - Sched_6

INVESTMENT SECURITIES - Schedule of Amortized Cost and Approximate Fair Value of Investment Debt Securities by Contractual Maturity (Including Mortgage-backed Securities) (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Amortized Cost
Due within one year	$ 3,734	$ 1,319
Due after one year through five years	10,681	15,379
Due after five years through ten years	44,255	28,242
Due after ten years	194,834	174,290
Total debt securities	253,504	219,230
Fair Value
Due within one year	3,730	1,319
Due after one year through five years	10,600	15,331
Due after five years through ten years	43,460	27,833
Due after ten years	191,191	172,239
Total debt securities	248,981	216,722
Amortized Cost
Due within one year	755	720
Due after one year through five years	3,405	3,245
Due after five years through ten years	960	1,875
Due after ten years	10,946	12,157
Total debt securities	16,066	17,997
Fair Value
Due within one year	755	721
Due after one year through five years	3,406	3,249
Due after five years through ten years	961	1,878
Due after ten years	10,683	12,099
Total debt securities	$ 15,805	$ 17,947

LOANS AND ALLOWANCE FOR LOAN _3

LOANS AND ALLOWANCE FOR LOAN LOSSES - Schedule of Loan Portfolio Excluding Loans Held for Sale (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 1,400,825	$ 1,258,779	$ 893,426
Mortgage loans on real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,143,944	1,047,074
Mortgage loans on real estate | Construction and development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	157,946	157,667	90,737
Mortgage loans on real estate | 1-4 Family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	287,137	276,922	177,205
Mortgage loans on real estate | Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	50,501	51,283	42,759
Mortgage loans on real estate | Farmland
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	21,356	23,838	8,207
Mortgage loans on real estate | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	627,004	537,364	380,716
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	210,924	135,392	85,377
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 45,957	$ 76,313	$ 108,425

LOANS AND ALLOWANCE FOR LOAN _4

LOANS AND ALLOWANCE FOR LOAN LOSSES - Additional Information (Detail)	9 Months Ended	12 Months Ended
	Sep. 30, 2018contract	Dec. 31, 2018USD ($)security_loancontract	Dec. 31, 2017USD ($)security_loancontract	Dec. 31, 2016USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unamortized premiums and discounts		$ 1,400,000	$ 2,600,000
Unearned income on loans		500,000	200,000
Total loans		1,400,825,000	1,258,779,000	$ 893,426,000
Balances of loans sold to and serviced for others		135,400,000	204,200,000
Unpaid principal balances of loans sold to and serviced for others		187,600,000	237,300,000
Loan outstanding to related parties		$ 93,021,000	$ 31,153,000	19,957,000
Number of loans under troubled debt restructurings | security_loan		24	18
Recorded investment or loans under troubled debt restructurings		$ 2,190,000	$ 1,621,000
Number of contracts in default | contract		3
Number of loans modified under troubled debt restructurings during previous twelve month period that subsequently defaulted | contract	3
Loans modified under troubled debt restructurings during previous twelve month period that subsequently defaulted		$ 600,000
Nonaccrual
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans under troubled debt restructurings | security_loan		1
Recorded investment or loans under troubled debt restructurings		$ 942,000	$ 0
Troubled Debt Restructuring, Adjustments to Maturity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans under troubled debt restructurings | security_loan			16
Troubled Debt Restructuring, Reduction in Interest Rate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans under troubled debt restructurings | security_loan			7
Doubtful or Loss
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		0	$ 0
Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		9,462,000	5,706,000
Substandard | Company of Which a Director is Principal Owner
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		700,000
Proceeds from loan originations		700,000
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		$ 45,957,000	$ 76,313,000	108,425,000
Number of loans under troubled debt restructurings | contract		0	1
Recorded investment or loans under troubled debt restructurings			$ 5,000
Consumer | Nonaccrual
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment or loans under troubled debt restructurings			0
Consumer | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		$ 992,000	1,121,000
Mortgage loans on real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		1,143,944,000	1,047,074,000
Mortgage loans on real estate | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		5,487,000	3,715,000
Construction and development | Mortgage loans on real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		$ 157,946,000	$ 157,667,000	90,737,000
Number of loans under troubled debt restructurings | contract		2	0
Recorded investment or loans under troubled debt restructurings		$ 523,000	$ 154,000
Number of loans modified under troubled debt restructurings during previous twelve month period that subsequently defaulted | contract	2
Loans modified under troubled debt restructurings during previous twelve month period that subsequently defaulted		400,000
Construction and development | Mortgage loans on real estate | Nonaccrual
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment or loans under troubled debt restructurings		284,000	0
Construction and development | Mortgage loans on real estate | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		586,000	282,000
1-4 Family | Mortgage loans on real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		$ 287,137,000	$ 276,922,000	$ 177,205,000
Number of loans under troubled debt restructurings | contract		8	0
Recorded investment or loans under troubled debt restructurings		$ 1,109,000	$ 889,000
Number of loans modified under troubled debt restructurings during previous twelve month period that subsequently defaulted | contract	1
Loans modified under troubled debt restructurings during previous twelve month period that subsequently defaulted		200,000
1-4 Family | Mortgage loans on real estate | Nonaccrual
Accounts, Notes, Loans and Financing Receivable [Line Items]
Recorded investment or loans under troubled debt restructurings		190,000	0
1-4 Family | Mortgage loans on real estate | Substandard
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans		$ 1,303,000	$ 1,356,000
Auto | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted average remaining term of indirect auto loan portfolio		2 years 8 months
Auto | Consumer | Credit Concentration Risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Concentration risk, percentage		67.00%

LOANS AND ALLOWANCE FOR LOAN _5

LOANS AND ALLOWANCE FOR LOAN LOSSES - Schedule of Aging Analysis of Loans (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 1,389,027	$ 1,242,766
Nonaccrual	3,597	1,707
Total Past Due & Nonaccrual	5,781	5,649
Acquired Impaired Loans	6,017	10,364
Total Loans	1,400,825	1,258,779	$ 893,426
30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing	2,047	3,315
60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing	137	493
90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing	0	134
Mortgage loans on real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,135,135	1,035,348
Nonaccrual	2,539	579
Total Past Due & Nonaccrual	4,031	2,695
Acquired Impaired Loans	4,778	9,031
Total Loans	1,143,944	1,047,074
Mortgage loans on real estate | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing	1,451	1,728
Mortgage loans on real estate | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing	41	274
Mortgage loans on real estate | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing	0	114
Mortgage loans on real estate | Construction and development
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	157,202	157,123
Nonaccrual	556	34
Total Past Due & Nonaccrual	731	259
Acquired Impaired Loans	13	285
Total Loans	157,946	157,667	90,737
Mortgage loans on real estate | Construction and development | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing	175	225
Mortgage loans on real estate | Construction and development | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing	0	0
Mortgage loans on real estate | Construction and development | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing	0	0
Mortgage loans on real estate | 1-4 Family
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	284,205	273,321
Nonaccrual	1,300	478
Total Past Due & Nonaccrual	2,442	2,115
Acquired Impaired Loans	490	1,486
Total Loans	287,137	276,922	177,205
Mortgage loans on real estate | 1-4 Family | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing	1,101	1,396
Mortgage loans on real estate | 1-4 Family | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing	41	185
Mortgage loans on real estate | 1-4 Family | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing	0	56
Mortgage loans on real estate | Multifamily
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	50,392	50,271
Nonaccrual	0	0
Total Past Due & Nonaccrual	109	0
Acquired Impaired Loans	0	1,012
Total Loans	50,501	51,283	42,759
Mortgage loans on real estate | Multifamily | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing	109	0
Mortgage loans on real estate | Multifamily | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing	0	0
Mortgage loans on real estate | Multifamily | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing	0	0
Mortgage loans on real estate | Farmland
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	19,092	19,619
Nonaccrual	0	0
Total Past Due & Nonaccrual	0	58
Acquired Impaired Loans	2,264	4,161
Total Loans	21,356	23,838	8,207
Mortgage loans on real estate | Farmland | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing	0	0
Mortgage loans on real estate | Farmland | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing	0	0
Mortgage loans on real estate | Farmland | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing	0	58
Mortgage loans on real estate | Commercial real estate
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	624,244	535,014
Nonaccrual	683	67
Total Past Due & Nonaccrual	749	263
Acquired Impaired Loans	2,011	2,087
Total Loans	627,004	537,364	380,716
Mortgage loans on real estate | Commercial real estate | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing	66	107
Mortgage loans on real estate | Commercial real estate | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing	0	89
Mortgage loans on real estate | Commercial real estate | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing	0	0
Commercial and industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	209,399	133,009
Nonaccrual	64	10
Total Past Due & Nonaccrual	330	1,054
Acquired Impaired Loans	1,195	1,329
Total Loans	210,924	135,392	85,377
Commercial and industrial | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing	221	977
Commercial and industrial | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing	45	67
Commercial and industrial | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing	0	0
Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	44,493	74,409
Nonaccrual	994	1,118
Total Past Due & Nonaccrual	1,420	1,900
Acquired Impaired Loans	44	4
Total Loans	45,957	76,313	$ 108,425
Consumer | 30-59 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing	375	610
Consumer | 60-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing	51	152
Consumer | 90 Days or More Past Due
Financing Receivable, Recorded Investment, Past Due [Line Items]
Accruing	$ 0	$ 20

LOANS AND ALLOWANCE FOR LOAN _6

LOANS AND ALLOWANCE FOR LOAN LOSSES - Summary of the Company's Loan Portfolio by Credit Quality Indicator (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 1,400,825	$ 1,258,779	$ 893,426
Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,391,054	1,249,968
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	236	3,105
Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	9,462	5,706
Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	73	0
Mortgage loans on real estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,143,944	1,047,074
Mortgage loans on real estate | Construction and development
Financing Receivable, Recorded Investment [Line Items]
Total loans	157,946	157,667	90,737
Mortgage loans on real estate | 1-4 Family
Financing Receivable, Recorded Investment [Line Items]
Total loans	287,137	276,922	177,205
Mortgage loans on real estate | Multifamily
Financing Receivable, Recorded Investment [Line Items]
Total loans	50,501	51,283	42,759
Mortgage loans on real estate | Farmland
Financing Receivable, Recorded Investment [Line Items]
Total loans	21,356	23,838	8,207
Mortgage loans on real estate | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	627,004	537,364	380,716
Mortgage loans on real estate | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,138,315	1,040,512
Mortgage loans on real estate | Pass | Construction and development
Financing Receivable, Recorded Investment [Line Items]
Total loans	157,360	157,385
Mortgage loans on real estate | Pass | 1-4 Family
Financing Receivable, Recorded Investment [Line Items]
Total loans	285,692	275,492
Mortgage loans on real estate | Pass | Multifamily
Financing Receivable, Recorded Investment [Line Items]
Total loans	50,501	51,283
Mortgage loans on real estate | Pass | Farmland
Financing Receivable, Recorded Investment [Line Items]
Total loans	19,092	19,611
Mortgage loans on real estate | Pass | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	625,670	536,741
Mortgage loans on real estate | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	69	2,847
Mortgage loans on real estate | Special Mention | Construction and development
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Mortgage loans on real estate | Special Mention | 1-4 Family
Financing Receivable, Recorded Investment [Line Items]
Total loans	69	74
Mortgage loans on real estate | Special Mention | Multifamily
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Mortgage loans on real estate | Special Mention | Farmland
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	2,773
Mortgage loans on real estate | Special Mention | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Mortgage loans on real estate | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	5,487	3,715
Mortgage loans on real estate | Substandard | Construction and development
Financing Receivable, Recorded Investment [Line Items]
Total loans	586	282
Mortgage loans on real estate | Substandard | 1-4 Family
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,303	1,356
Mortgage loans on real estate | Substandard | Multifamily
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Mortgage loans on real estate | Substandard | Farmland
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,264	1,454
Mortgage loans on real estate | Substandard | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,334	623
Mortgage loans on real estate | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	73	0
Mortgage loans on real estate | Doubtful | Construction and development
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Mortgage loans on real estate | Doubtful | 1-4 Family
Financing Receivable, Recorded Investment [Line Items]
Total loans	73	0
Mortgage loans on real estate | Doubtful | Multifamily
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Mortgage loans on real estate | Doubtful | Farmland
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Mortgage loans on real estate | Doubtful | Commercial real estate
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Commercial and industrial
Financing Receivable, Recorded Investment [Line Items]
Total loans	210,924	135,392	85,377
Commercial and industrial | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	207,941	134,522
Commercial and industrial | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Commercial and industrial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,983	870
Commercial and industrial | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Consumer
Financing Receivable, Recorded Investment [Line Items]
Total loans	45,957	76,313	$ 108,425
Consumer | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	44,798	74,934
Consumer | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	167	258
Consumer | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	992	1,121
Consumer | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 0	$ 0

LOANS AND ALLOWANCE FOR LOAN _7

LOANS AND ALLOWANCE FOR LOAN LOSSES - Schedule of Aggregate Amount of Loans to Related Parties (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Loans and Leases Receivable, Related Parties [Roll Forward]
Balance, beginning of period	$ 31,153	$ 19,957
New loans/changes in relationship	79,639	24,428
Repayments/changes in relationship	(17,771)	(13,232)
Balance, end of period	$ 93,021	$ 31,153

LOANS AND ALLOWANCE FOR LOAN _8

LOANS AND ALLOWANCE FOR LOAN LOSSES - Summary of Accretable Yield on Acquired Impaired Loans (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Beginning balance	$ 0	$ 275
Loan disposals	0	(303)
Accretion to interest income	0	28
Ending Balance	$ 0	$ 0

LOANS AND ALLOWANCE FOR LOAN _9

LOANS AND ALLOWANCE FOR LOAN LOSSES - Summary of Allowance for Loan Losses (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period	$ 7,891	$ 7,051	$ 6,128
Provision for loan losses	2,570	1,540	2,079
Loans charged-off	(1,185)	(765)	(1,228)
Recoveries	178	65	72
Balance, end of period	$ 9,454	$ 7,891	$ 7,051

LOANS AND ALLOWANCE FOR LOAN_10

LOANS AND ALLOWANCE FOR LOAN LOSSES - Allowance for Loan Loss by Collateral Type (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Allowance for loan losses:
Balance, beginning of period	$ 7,891	$ 7,051	$ 6,128
Charge-offs	(1,185)	(765)	(1,228)
Recoveries	178	65	72
Provision	2,570	1,540	2,079
Balance, end of period	9,454	7,891	7,051
Ending allowance balance for loans individually evaluated for impairment	236	304	423
Ending allowance balance for loans acquired with deteriorated credit quality	9,218	7,587	6,628
Loans receivable:
Balance of loans individually evaluated for impairment	3,269	3,044	4,377
Total period-end balance	6,017	10,364	2,176
Balance of loans acquired with deteriorated credit quality	1,391,539	1,245,371	889,049
Total Loans	1,400,825	1,258,779	893,426
Receivables Acquired with Deteriorated Credit Quality
Allowance for loan losses:
Ending allowance balance for loans acquired with deteriorated credit quality	0		0
Ending allowance balance for loans acquired with deteriorated credit quality		0
Mortgage loans on real estate
Loans receivable:
Total Loans	1,143,944	1,047,074
Mortgage loans on real estate | Construction and development
Allowance for loan losses:
Balance, beginning of period	945	579	644
Charge-offs	(24)	0	(27)
Recoveries	12	34	14
Provision	105	332	(52)
Balance, end of period	1,038	945	579
Ending allowance balance for loans individually evaluated for impairment	0	0	0
Ending allowance balance for loans acquired with deteriorated credit quality	1,038	945	579
Loans receivable:
Balance of loans individually evaluated for impairment	339	182	645
Total period-end balance	13	285	660
Balance of loans acquired with deteriorated credit quality	157,594	157,200	90,092
Total Loans	157,946	157,667	90,737
Mortgage loans on real estate | Construction and development | Receivables Acquired with Deteriorated Credit Quality
Allowance for loan losses:
Ending allowance balance for loans acquired with deteriorated credit quality	0		0
Ending allowance balance for loans acquired with deteriorated credit quality		0
Mortgage loans on real estate | Farmland
Allowance for loan losses:
Balance, beginning of period	60	60	22
Charge-offs	0	0	0
Recoveries	0	0	0
Provision	21	0	38
Balance, end of period	81	60	60
Ending allowance balance for loans individually evaluated for impairment	0	0	0
Ending allowance balance for loans acquired with deteriorated credit quality	81	60	60
Loans receivable:
Balance of loans individually evaluated for impairment	0	0	0
Total period-end balance	2,264	4,161	0
Balance of loans acquired with deteriorated credit quality	19,092	19,677	8,207
Total Loans	21,356	23,838	8,207
Mortgage loans on real estate | Farmland | Receivables Acquired with Deteriorated Credit Quality
Allowance for loan losses:
Ending allowance balance for loans acquired with deteriorated credit quality	0		0
Ending allowance balance for loans acquired with deteriorated credit quality		0
Mortgage loans on real estate | 1-4 Family
Allowance for loan losses:
Balance, beginning of period	1,287	1,377	1,213
Charge-offs	(167)	0	(57)
Recoveries	29	7	13
Provision	316	(97)	208
Balance, end of period	1,465	1,287	1,377
Ending allowance balance for loans individually evaluated for impairment	0	0	0
Ending allowance balance for loans acquired with deteriorated credit quality	1,465	1,287	1,377
Loans receivable:
Balance of loans individually evaluated for impairment	1,177	1,136	1,673
Total period-end balance	490	1,486	494
Balance of loans acquired with deteriorated credit quality	285,470	274,300	175,532
Total Loans	287,137	276,922	177,205
Mortgage loans on real estate | 1-4 Family | Receivables Acquired with Deteriorated Credit Quality
Allowance for loan losses:
Ending allowance balance for loans acquired with deteriorated credit quality	0		0
Ending allowance balance for loans acquired with deteriorated credit quality		0
Mortgage loans on real estate | Multifamily
Allowance for loan losses:
Balance, beginning of period	332	355	246
Charge-offs	0	0	0
Recoveries	0	0	0
Provision	(1)	(23)	109
Balance, end of period	331	332	355
Ending allowance balance for loans individually evaluated for impairment	0	0	0
Ending allowance balance for loans acquired with deteriorated credit quality	331	332	355
Loans receivable:
Balance of loans individually evaluated for impairment	0	0	0
Total period-end balance	0	1,012	1,022
Balance of loans acquired with deteriorated credit quality	50,501	50,271	42,759
Total Loans	50,501	51,283	42,759
Mortgage loans on real estate | Multifamily | Receivables Acquired with Deteriorated Credit Quality
Allowance for loan losses:
Ending allowance balance for loans acquired with deteriorated credit quality	0		0
Ending allowance balance for loans acquired with deteriorated credit quality		0
Mortgage loans on real estate | Commercial real estate
Allowance for loan losses:
Balance, beginning of period	3,599	2,499	2,156
Charge-offs	0	0	(526)
Recoveries	0	0	1
Provision	583	1,100	868
Balance, end of period	4,182	3,599	2,499
Ending allowance balance for loans individually evaluated for impairment	0	0	0
Ending allowance balance for loans acquired with deteriorated credit quality	4,182	3,599	2,499
Loans receivable:
Balance of loans individually evaluated for impairment	761	640	608
Total period-end balance	2,011	2,087	0
Balance of loans acquired with deteriorated credit quality	624,232	534,637	380,108
Total Loans	627,004	537,364	380,716
Mortgage loans on real estate | Commercial real estate | Receivables Acquired with Deteriorated Credit Quality
Allowance for loan losses:
Ending allowance balance for loans acquired with deteriorated credit quality	0		0
Ending allowance balance for loans acquired with deteriorated credit quality		0
Commercial and industrial
Allowance for loan losses:
Balance, beginning of period	693	759	513
Charge-offs	(481)	(270)	0
Recoveries	55	0	20
Provision	1,374	204	226
Balance, end of period	1,641	693	759
Ending allowance balance for loans individually evaluated for impairment	0	0	136
Ending allowance balance for loans acquired with deteriorated credit quality	1,641	693	623
Loans receivable:
Balance of loans individually evaluated for impairment	76	0	443
Total period-end balance	1,195	1,329	0
Balance of loans acquired with deteriorated credit quality	209,653	134,063	84,934
Total Loans	210,924	135,392	85,377
Commercial and industrial | Receivables Acquired with Deteriorated Credit Quality
Allowance for loan losses:
Ending allowance balance for loans acquired with deteriorated credit quality	0		0
Ending allowance balance for loans acquired with deteriorated credit quality		0
Consumer
Allowance for loan losses:
Balance, beginning of period	975	1,422	1,334
Charge-offs	(513)	(495)	(618)
Recoveries	82	24	24
Provision	172	24	682
Balance, end of period	716	975	1,422
Ending allowance balance for loans individually evaluated for impairment	236	304	287
Ending allowance balance for loans acquired with deteriorated credit quality	480	671	1,135
Loans receivable:
Balance of loans individually evaluated for impairment	916	1,086	1,008
Total period-end balance	44	4	0
Balance of loans acquired with deteriorated credit quality	44,997	75,223	107,417
Total Loans	45,957	76,313	108,425
Consumer | Receivables Acquired with Deteriorated Credit Quality
Allowance for loan losses:
Ending allowance balance for loans acquired with deteriorated credit quality	$ 0		$ 0
Ending allowance balance for loans acquired with deteriorated credit quality		$ 0

LOANS AND ALLOWANCE FOR LOAN_11

LOANS AND ALLOWANCE FOR LOAN LOSSES - Summary of Recorded Investment and Unpaid Principal Balance for Impaired Loans (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable Impaired [Line Items]
With no related allowance recorded, Recorded Investment	$ 2,568	$ 2,126	$ 3,094
With no related allowance recorded, Unpaid Principal Balance	2,630	2,242	3,167
With no related allowance recorded, Average Recorded Investment	3,258	2,804	6,584
With no related allowance recorded, Interest Income Recognized	72	136	174
With related allowance recorded, Recorded Investment	701	918	1,283
With related allowance recorded, Unpaid Principal Balance	738	956	1,303
Related Allowance	236	304	423
With related allowance recorded, Average Recorded Investment	588	738	650
With related allowance recorded, Interest Income Recognized	0	1	6
Total loans, Recorded Investment	3,269	3,044	4,377
Total loans, Unpaid Principal Balance	3,368	3,198	4,470
Total loans, Average Recorded Investment	3,846	3,542	7,234
Total loans, Interest Income Recognized	72	137	180
Mortgage loans on real estate
Financing Receivable Impaired [Line Items]
With no related allowance recorded, Recorded Investment	2,277	1,958	2,926
With no related allowance recorded, Unpaid Principal Balance	2,316	2,025	2,985
With no related allowance recorded, Average Recorded Investment	2,570	2,302	4,676
With no related allowance recorded, Interest Income Recognized	72	135	163
Related Allowance	0	0	0
Total loans, Recorded Investment	2,277	1,958	2,926
Total loans, Unpaid Principal Balance	2,316	2,025	2,985
Total loans, Average Recorded Investment	2,570	2,302	4,676
Total loans, Interest Income Recognized	72	135	163
Mortgage loans on real estate | Construction and development
Financing Receivable Impaired [Line Items]
With no related allowance recorded, Recorded Investment	339	182	645
With no related allowance recorded, Unpaid Principal Balance	359	202	661
With no related allowance recorded, Average Recorded Investment	237	338	1,024
With no related allowance recorded, Interest Income Recognized	13	13	90
Related Allowance	0	0	0
Total loans, Recorded Investment	339	182	645
Total loans, Unpaid Principal Balance	359	202	661
Total loans, Average Recorded Investment	237	338	1,024
Total loans, Interest Income Recognized	13	13	90
Mortgage loans on real estate | 1-4 Family
Financing Receivable Impaired [Line Items]
With no related allowance recorded, Recorded Investment	1,177	1,136	1,673
With no related allowance recorded, Unpaid Principal Balance	1,180	1,169	1,701
With no related allowance recorded, Average Recorded Investment	1,455	1,344	1,910
With no related allowance recorded, Interest Income Recognized	39	76	66
Related Allowance	0	0	0
Total loans, Recorded Investment	1,177	1,136	1,673
Total loans, Unpaid Principal Balance	1,180	1,169	1,701
Total loans, Average Recorded Investment	1,455	1,344	1,910
Total loans, Interest Income Recognized	39	76	66
Mortgage loans on real estate | Commercial real estate
Financing Receivable Impaired [Line Items]
With no related allowance recorded, Recorded Investment	761	640	608
With no related allowance recorded, Unpaid Principal Balance	777	654	623
With no related allowance recorded, Average Recorded Investment	878	620	1,742
With no related allowance recorded, Interest Income Recognized	20	46	7
Related Allowance	0	0	0
Total loans, Recorded Investment	761	640	608
Total loans, Unpaid Principal Balance	777	654	623
Total loans, Average Recorded Investment	878	620	1,742
Total loans, Interest Income Recognized	20	46	7
Commercial and industrial
Financing Receivable Impaired [Line Items]
With no related allowance recorded, Recorded Investment	76	0	15
With no related allowance recorded, Unpaid Principal Balance	77	0	16
With no related allowance recorded, Average Recorded Investment	278	122	1,509
With no related allowance recorded, Interest Income Recognized	0	0	0
With related allowance recorded, Recorded Investment			428
With related allowance recorded, Unpaid Principal Balance			430
Related Allowance	0	0	136
With related allowance recorded, Average Recorded Investment			144
With related allowance recorded, Interest Income Recognized			0
Total loans, Recorded Investment	76	0	443
Total loans, Unpaid Principal Balance	77	0	446
Total loans, Average Recorded Investment	278	122	1,653
Total loans, Interest Income Recognized	0	0	0
Consumer
Financing Receivable Impaired [Line Items]
With no related allowance recorded, Recorded Investment	215	168	153
With no related allowance recorded, Unpaid Principal Balance	237	217	166
With no related allowance recorded, Average Recorded Investment	410	380	399
With no related allowance recorded, Interest Income Recognized	0	1	11
With related allowance recorded, Recorded Investment	701	918	855
With related allowance recorded, Unpaid Principal Balance	738	956	873
Related Allowance	236	304	287
With related allowance recorded, Average Recorded Investment	588	738	506
With related allowance recorded, Interest Income Recognized	0	1	6
Total loans, Recorded Investment	916	1,086	1,008
Total loans, Unpaid Principal Balance	975	1,173	1,039
Total loans, Average Recorded Investment	998	1,118	905
Total loans, Interest Income Recognized	$ 0	$ 2	$ 17

LOANS AND ALLOWANCE FOR LOAN_12

LOANS AND ALLOWANCE FOR LOAN LOSSES - Summary of TDR Pre- and Post-modification Outstanding Recorded Investments by Loan Categories (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)security_loancontract	Dec. 31, 2017USD ($)security_loancontract
Financing Receivable Modifications [Line Items]
Number of Contracts | security_loan	24	18
Pre- Modification Outstanding Recorded Investment	$ 1,002	$ 5
Post- Modification Outstanding Recorded Investment	$ 1,002	$ 5
Mortgage loans on real estate | Construction and development
Financing Receivable Modifications [Line Items]
Number of Contracts | contract	2	0
Pre- Modification Outstanding Recorded Investment	$ 403	$ 0
Post- Modification Outstanding Recorded Investment	$ 403	$ 0
Mortgage loans on real estate | 1-4 Family
Financing Receivable Modifications [Line Items]
Number of Contracts | contract	8	0
Pre- Modification Outstanding Recorded Investment	$ 587	$ 0
Post- Modification Outstanding Recorded Investment	$ 587	$ 0
Commercial and industrial
Financing Receivable Modifications [Line Items]
Number of Contracts | contract	2	0
Pre- Modification Outstanding Recorded Investment	$ 12	$ 0
Post- Modification Outstanding Recorded Investment	$ 12	$ 0
Consumer
Financing Receivable Modifications [Line Items]
Number of Contracts | contract	0	1
Pre- Modification Outstanding Recorded Investment	$ 0	$ 5
Post- Modification Outstanding Recorded Investment	$ 0	$ 5

LOANS AND ALLOWANCE FOR LOAN_13

LOANS AND ALLOWANCE FOR LOAN LOSSES - Summary of Accruing and Nonaccrual TDRs and Related Loan Losses by Portfolio Type (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable Modifications [Line Items]
TDRs loans	$ 2,190	$ 1,621
Related Allowance	0	0
Accruing
Financing Receivable Modifications [Line Items]
TDRs loans	1,248	1,621
Nonaccrual
Financing Receivable Modifications [Line Items]
TDRs loans	942	0
Commercial real estate
Financing Receivable Modifications [Line Items]
TDRs loans	546
Related Allowance	0
Commercial real estate | Accruing
Financing Receivable Modifications [Line Items]
TDRs loans	78
Commercial real estate | Nonaccrual
Financing Receivable Modifications [Line Items]
TDRs loans	468
Mortgage loans on real estate | Construction and development
Financing Receivable Modifications [Line Items]
TDRs loans	523	154
Related Allowance	0	0
Mortgage loans on real estate | Construction and development | Accruing
Financing Receivable Modifications [Line Items]
TDRs loans	239	154
Mortgage loans on real estate | Construction and development | Nonaccrual
Financing Receivable Modifications [Line Items]
TDRs loans	284	0
Mortgage loans on real estate | 1-4 Family
Financing Receivable Modifications [Line Items]
TDRs loans	1,109	889
Related Allowance	0	0
Mortgage loans on real estate | 1-4 Family | Accruing
Financing Receivable Modifications [Line Items]
TDRs loans	919	889
Mortgage loans on real estate | 1-4 Family | Nonaccrual
Financing Receivable Modifications [Line Items]
TDRs loans	190	0
Commercial and industrial
Financing Receivable Modifications [Line Items]
TDRs loans	12	573
Related Allowance	0	0
Commercial and industrial | Accruing
Financing Receivable Modifications [Line Items]
TDRs loans	12	573
Commercial and industrial | Nonaccrual
Financing Receivable Modifications [Line Items]
TDRs loans	$ 0	0
Consumer
Financing Receivable Modifications [Line Items]
TDRs loans		5
Related Allowance		0
Consumer | Accruing
Financing Receivable Modifications [Line Items]
TDRs loans		5
Consumer | Nonaccrual
Financing Receivable Modifications [Line Items]
TDRs loans		$ 0

LOANS AND ALLOWANCE FOR LOAN_14

LOANS AND ALLOWANCE FOR LOAN LOSSES - Summary of Average Recorded Investment and Interest Income Recognized for TDRs (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable Modifications [Line Items]
Average Recorded Investment	$ 3,846	$ 3,542	$ 7,234
Interest Income Recognized	72	137	180
Mortgage loans on real estate
Financing Receivable Modifications [Line Items]
Average Recorded Investment	2,570	2,302	4,676
Interest Income Recognized	72	135	163
Mortgage loans on real estate | Construction and development
Financing Receivable Modifications [Line Items]
Average Recorded Investment	237	338	1,024
Interest Income Recognized	13	13	90
Mortgage loans on real estate | 1-4 Family
Financing Receivable Modifications [Line Items]
Average Recorded Investment	1,455	1,344	1,910
Interest Income Recognized	39	76	66
Mortgage loans on real estate | Commercial real estate
Financing Receivable Modifications [Line Items]
Average Recorded Investment	878	620	1,742
Interest Income Recognized	20	46	7
Commercial and industrial
Financing Receivable Modifications [Line Items]
Average Recorded Investment	278	122	1,653
Interest Income Recognized	0	0	0
Consumer
Financing Receivable Modifications [Line Items]
Average Recorded Investment	998	1,118	905
Interest Income Recognized	0	2	17
TDRs
Financing Receivable Modifications [Line Items]
Average Recorded Investment	1,819	2,008	2,402
Interest Income Recognized	78	137	86
TDRs | Mortgage loans on real estate | Construction and development
Financing Receivable Modifications [Line Items]
Average Recorded Investment	308	159	171
Interest Income Recognized	13	13	13
TDRs | Mortgage loans on real estate | 1-4 Family
Financing Receivable Modifications [Line Items]
Average Recorded Investment	948	1,255	1,614
Interest Income Recognized	45	76	66
TDRs | Mortgage loans on real estate | Commercial real estate
Financing Receivable Modifications [Line Items]
Average Recorded Investment	553	592	617
Interest Income Recognized	20	46	$ 7
TDRs | Commercial and industrial
Financing Receivable Modifications [Line Items]
Average Recorded Investment	8
Interest Income Recognized	0
TDRs | Consumer
Financing Receivable Modifications [Line Items]
Average Recorded Investment	2	2
Interest Income Recognized	$ 0	$ 2

OTHER REAL ESTATE OWNED - Sched

OTHER REAL ESTATE OWNED - Schedule of Activity in Other Real Estate Owned (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Repossessed Assets [Roll Forward]
Balance, beginning of period	$ 3,837	$ 4,065
Additions	496	42
Acquired other real estate owned	0	477
Sales of other real estate owned	(155)	(564)
Write-downs	(567)	(183)
Balance, end of period	$ 3,611	$ 3,837

OTHER REAL ESTATE OWNED - Addit

OTHER REAL ESTATE OWNED - Additional Information (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Real Estate Properties [Line Items]
Other real estate owned related to acquisitions	$ 3,611	$ 3,837	$ 4,065
Loans secured by real estate in the process of foreclosure	400
Acquired Loans
Real Estate Properties [Line Items]
Other real estate owned related to acquisitions	$ 300	$ 200

BANK PREMISES AND EQUIPMENT - S

BANK PREMISES AND EQUIPMENT - Summary of Bank Premises and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Property Plant And Equipment [Line Items]
Less: Accumulated depreciation and amortization	$ (9,898)	$ (7,825)
Bank premises and equipment, net	40,229	37,540
Land
Property Plant And Equipment [Line Items]
Bank premises and equipment, gross	10,820	10,476
Buildings and improvements
Property Plant And Equipment [Line Items]
Bank premises and equipment, gross	28,147	25,750
Furniture and equipment
Property Plant And Equipment [Line Items]
Bank premises and equipment, gross	8,832	7,419
Software
Property Plant And Equipment [Line Items]
Bank premises and equipment, gross	1,329	812
Construction-in-progress
Property Plant And Equipment [Line Items]
Bank premises and equipment, gross	$ 999	$ 908

BANK PREMISES AND EQUIPMENT - A

BANK PREMISES AND EQUIPMENT - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property Plant And Equipment [Line Items]
Depreciation and amortization	$ 2,553	$ 1,865	$ 1,493
Noninterest Expense
Property Plant And Equipment [Line Items]
Depreciation and amortization	$ 2,600	$ 1,900	$ 1,500

GOODWILL AND OTHER INTANGIBLE_3

GOODWILL AND OTHER INTANGIBLE ASSETS - Additional Information (Detail) - USD ($)	Oct. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 01, 2017	Jul. 01, 2017
Business Acquisition [Line Items]
Goodwill and other intangible assets, net		$ 19,787,000	$ 19,926,000
Accumulated impairment losses		0
Trademark intangible, carrying value		100,000	100,000
Goodwill and trademark intangible asset impairment charges	$ 0	0
Other Operating Expenses
Business Acquisition [Line Items]
Amortization expense		$ 500,000	200,000	$ 41,000
Core Deposits
Business Acquisition [Line Items]
Weighted average amortization period remaining		8 years 8 months
Minimum | Core Deposits
Business Acquisition [Line Items]
Estimated useful life of core deposit intangibles		10 years
Maximum | Core Deposits
Business Acquisition [Line Items]
Estimated useful life of core deposit intangibles		15 years
Citizens Bancshares, Inc.
Business Acquisition [Line Items]
Goodwill		$ 9,100,000				$ 9,053,000
Core deposit intangible			1,500,000			$ 1,462,000
BOJ Bancshares, Inc.
Business Acquisition [Line Items]
Goodwill		$ 5,700,000			$ 5,687,000
Core deposit intangible			$ 1,000,000		$ 1,018,000

GOODWILL AND OTHER INTANGIBLE_4

GOODWILL AND OTHER INTANGIBLE ASSETS - Summary of Core Deposit Intangible Assets Activity (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Gross carrying amount	$ 3,097	$ 3,097
Accumulated amortization	(834)	(357)
Net carrying amount	$ 2,263	$ 2,740

GOODWILL AND OTHER INTANGIBLE_5

GOODWILL AND OTHER INTANGIBLE ASSETS - Future Amortization of Core Intangibles (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
2019	$ 432
2020	387
2021	342
2022	297
2023	252
Thereafter	553
Net carrying amount	$ 2,263	$ 2,740

DEPOSITS - Summary of Deposits

DEPOSITS - Summary of Deposits (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Banking and Thrift [Abstract]
Noninterest-bearing demand deposits	$ 217,457	$ 216,599
Interest-bearing demand deposits	295,212	208,683
Money market deposit accounts	179,340	146,140
Savings accounts	104,146	117,372
Time deposits	565,576	536,443
Total deposits	$ 1,361,731	$ 1,225,237

DEPOSITS - Summary of Outstandi

DEPOSITS - Summary of Outstanding Time Deposit (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Banking and Thrift [Abstract]
$0 to $99,999	$ 229,105	$ 252,636
$100,000 to $249,999	236,031	203,966
$250,000 and above	100,440	79,841
Total	$ 565,576	$ 536,443

DEPOSITS - Schedule of Contract

DEPOSITS - Schedule of Contractual Maturities of Time Deposits 100000 or More Outstanding (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Time remaining until maturity:
Three months or less	$ 77,923	$ 81,844
Over three through six months	72,397	55,411
Over six through twelve months	102,055	63,183
Over one year through three years	72,524	80,160
Over three years	11,572	3,209
Contractual maturities of time deposits of $100,000 or more outstanding	$ 336,471	$ 283,807

DEPOSITS - Schedule of Maturiti

DEPOSITS - Schedule of Maturities of Time Deposits (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Banking and Thrift [Abstract]
2019	$ 412,824
2020	111,891
2021	22,944
2022	9,754
2023	8,163
Total	$ 565,576	$ 536,443

DEPOSITS - Additional Informati

DEPOSITS - Additional Information (Detail) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Banking and Thrift [Abstract]
Public fund deposits	$ 85	$ 78.3
Fair value U.S. government securities	74	67.5
Total deposits outstanding	$ 49.4	$ 40.4

SECURITIES SOLD UNDER AGREEME_2

SECURITIES SOLD UNDER AGREEMENT TO REPURCHASE (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Banking and Thrift [Abstract]
Securities sold under agreements for repurchase	$ 1,999	$ 21,935
Fair value of securities sold under agreements	$ 3,500	$ 23,300
Interest rate of securities sold under agreements	1.67%	0.66%
Weighted-average interest rate of securities sold under agreements	0.99%	0.33%	0.20%

SUBORDINATED DEBT SECURITIES (D

SUBORDINATED DEBT SECURITIES (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Mar. 24, 2017
Debt Instrument [Line Items]
Subordinated debt	$ 18,215,000	$ 18,168,000
Subordinated Debt
Debt Instrument [Line Items]
Issuance of debt			$ 18,600,000
Interest rate			6.00%
Subordinated debt	$ 18,200,000
Debt issuance costs			$ 400,000
Subordinated Debt | LIBOR
Debt Instrument [Line Items]
Basis points	394.50%

OTHER BORROWED FUNDS - Summary

OTHER BORROWED FUNDS - Summary of Maturities and Weighted-Average Rate of FHLB Advances by Year of Maturity (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Amount
2018	$ 0	$ 126,600
2019	148,400	12,000
2020	3,100	3,100
2027	0	25,000
2028	25,000	0
2033	30,000	0
ASC 805 Fair Value Adjustment	(10)	(42)
Total fixed rate advances amount	$ 206,490	$ 166,658
Weighted Average Rate
2018	0.00%	1.42%
2019	2.46%	1.46%
2020	1.52%	1.52%
2027	0.00%	1.06%
2028	1.77%	0.00%
2033	1.88%	0.00%
ASC 805 Fair Value Adjustment	0.00%	0.00%
Weighted-average rate	2.28%	1.37%

OTHER BORROWED FUNDS - Addition

OTHER BORROWED FUNDS - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Additional line of credit available with FHLB	$ 481,700,000
Advance contractually maturing in 2028	25,000,000	$ 0
Advance contractually maturing in 2033	$ 30,000,000	0
Interest payment extension period	60 months
Junior subordinated debt	$ 5,845,000	$ 5,792,000
Unsecured Debt
Debt Instrument [Line Items]
Total lines of credit, available amount	60,000,000
Total lines of credit, outstanding balances	0
Loan Portfolio
Debt Instrument [Line Items]
Collateral agreement with the FHLB	607,400,000
Investment Securities
Debt Instrument [Line Items]
Collateral agreement with the FHLB	$ 90,100,000

OTHER BORROWED FUNDS - Junior S

OTHER BORROWED FUNDS - Junior Subordinated Debt (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Carrying Value	$ 5,845	$ 5,792
First Community Louisiana Statutory Trust I
Debt Instrument [Line Items]
Carrying Value	3,609
BOJ Bancshares Statutory Trust I
Debt Instrument [Line Items]
Carrying Value	2,236
Junior Subordinate Debt
Debt Instrument [Line Items]
Face Value	6,702
Junior Subordinate Debt | First Community Louisiana Statutory Trust I
Debt Instrument [Line Items]
Face Value	$ 3,609
Interest rate	4.56%
Junior Subordinate Debt | First Community Louisiana Statutory Trust I | LIBOR
Debt Instrument [Line Items]
Variable Interest Rate	1.77%
Junior Subordinate Debt | BOJ Bancshares Statutory Trust I
Debt Instrument [Line Items]
Face Value	$ 3,093
Interest rate	4.69%
Junior Subordinate Debt | BOJ Bancshares Statutory Trust I | LIBOR
Debt Instrument [Line Items]
Variable Interest Rate	1.90%

DERIVATIVE FINANCIAL INSTRUME_2

DERIVATIVE FINANCIAL INSTRUMENTS (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Derivatives Fair Value [Line Items]
Maximum length of time hedged cash flow hedge period									1 year 7 months
Notional amount of derivative contract	$ 50,000								$ 50,000
Gain on derivative instrument									100	$ 400	$ 400
Income tax expense	807	$ 516	$ 966	$ 1,341	$ 1,492	$ 1,032	$ 877	$ 847	3,630	4,248	3,609
Derivative instrument gain included in accumulated other comprehensive income to be reclassified to earnings									500
Interest Rate Swap
Derivatives Fair Value [Line Items]
Income tax expense									22	100	$ 200
Interest Rate Swap | Designated As Hedging Instrument | Cash Flow Hedging | Other Assets
Derivatives Fair Value [Line Items]
Derivative financial instruments	$ 600				$ 500				$ 600	$ 500

STOCKHOLDERS' EQUITY - Addition

STOCKHOLDERS' EQUITY - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	Dec. 01, 2017	Mar. 22, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)			5,000,000	5,000,000
Preferred stock, shares outstanding (in shares)			0
Common stock, shares authorized (in shares)			40,000,000	40,000,000
Common stock, shares outstanding (in shares)			9,484,219	9,514,926	7,101,851
Common stock issued in offering, net			$ 0	$ 32,509	$ 0
Total stockholders' equity			182,262	$ 172,729	$ 112,757	$ 109,350
Aggregate amount available for dividend payments without regulatory approval			$ 29,700
BOJ Bancshares, Inc.
Class of Stock [Line Items]
Merger consideration, aggregate shares of common stock (in shares)	799,559
Common Stock
Class of Stock [Line Items]
Shares issued (in shares)		1,600,000
Public offering price (in dollars per share)		$ 21.25
Common stock issued in offering, net		$ 32,500

STOCKHOLDERS' EQUITY - AOCI Act

STOCKHOLDERS' EQUITY - AOCI Activity (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 172,729	$ 112,757	$ 109,350
Net Change	(1,505)	500	(1,408)
Ending Balance	182,262	172,729	112,757
Unrealized gain (loss), available for sale, net
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(71)	(401)	1,099
Net Change	(1,576)	330	(1,500)
Ending Balance	(1,647)	(71)	(401)
Reclassification of realized gain, net
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(1,914)	(1,683)	(1,396)
Net Change	(11)	(231)	(287)
Ending Balance	(1,925)	(1,914)	(1,683)
Unrealized loss, transfer from available for sale to held to maturity, net
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	7	8	12
Net Change	(2)	(1)	(4)
Ending Balance	5	7	8
Change in fair value of interest rate swap designated as a cash flow hedge, net
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	407	5	(378)
Net Change	84	402	383
Ending Balance	491	407	5
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(1,571)	(2,071)	(663)
Net Change	(1,505)		(1,408)
Ending Balance	$ (3,076)	$ (1,571)	$ (2,071)

STOCK-BASED COMPENSATION - Warr

STOCK-BASED COMPENSATION - Warrants (Narrative) (Detail) - $ / shares	Dec. 31, 2018	Oct. 01, 2011
The Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for grant (in shares)	600,000
The Plan | Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining shares available for grant (in shares)	507,869
SLBB
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock warrants issued (in shares)		130,875
Warrant exercisable price per share (in dollars per share)		$ 13.33

STOCK-BASED COMPENSATION - Summ

STOCK-BASED COMPENSATION - Summary of Warrants Activity (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Oct. 01, 2011
Class Of Warrant Or Right
Balance, beginning of period (in shares)	64,425	124,275	130,875
Issued (in shares)	0	0	0
Forfeited (in shares)	0	0	0
Exercised (in shares)	(64,425)	(59,850)	(6,600)
Balance, end of period (in shares)	0	64,425	124,275
SLBB
Class of Warrant or Right [Line Items]
Warrant exercisable price per share (in dollars per share)				$ 13.33

STOCK-BASED COMPENSATION - Stoc

STOCK-BASED COMPENSATION - Stock Options (Narrative) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options issued (in shares)	31,788	36,177	46,512
Intrinsic value of stock options outstanding	$ 3
Intrinsic value of exercisable stock options	1.6
Stock option expense	0.3	$ 0.2	$ 0.2
Unrecognized compensation cost related to stock options	$ 0.6
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average period for recognition	2 years 8 months
Key Personnel
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options issued (in shares)	31,788	36,177	46,512
Key Personnel | Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options vesting period	5 years
Key Personnel | Stock options | Tranche one
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	20.00%
Key Personnel | Stock options | Tranche two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	20.00%
Key Personnel | Stock options | Tranche three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	20.00%
Key Personnel | Stock options | Tranche four
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	20.00%
Key Personnel | Stock options | Tranche five
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	20.00%

STOCK-BASED COMPENSATION - Sche

STOCK-BASED COMPENSATION - Schedule of Stock Option Activity (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Shares
Beginning Balance (in shares)	322,917	319,364	278,352
Issued (in shares)	31,788	36,177	46,512
Forfeited (in shares)	(1,644)	(5,334)	0
Exercised (in shares)	(12,415)	(27,290)	(5,500)
Ending Balance (in shares)	340,646	322,917	319,364	278,352
Exercisable (in shares)	162,268
Weighted Average Price
Beginning balance (in dollars per share)	$ 15.09	$ 14.36	$ 14.37
Issued (in dollars per share)	20.25	20.25	14.28
Forfeited (in dollars per share)	14	14	0
Exercised (in dollars per share)	14.07	13.70	14
Ending balance (in dollars per share)	15.98	$ 15.09	$ 14.36	$ 14.37
Exercisable (in dollars per share)	$ 14.70
Weighted Average Remaining Contractual Term (Years)
Outstanding, term	6 years 5 months 25 days	7 years 2 months 8 days	7 years 8 months 1 day	8 years 5 months 1 day
Exercisable, term	6 years 10 days

STOCK-BASED COMPENSATION - Sc_2

STOCK-BASED COMPENSATION - Schedule of Assumptions Used for Option Awards Granted (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Dividend yield	0.52%	0.22%
Expected volatility	24.99%	20.46%
Risk-free interest rate	2.68%	2.19%
Expected term (in years)	6 years 6 months	7 years
Weighted-average grant date fair value (in dollars per share)	$ 7.16	$ 5.39

STOCK-BASED COMPENSATION - Time

STOCK-BASED COMPENSATION - Time Vested Restricted Stock Awards (Narrative) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average period for recognition	6 years 10 days
Restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock appreciation rights granted (in shares)		54,724
Unearned stock-based compensation	$ 2.1	$ 1.5	$ 1.1
Weighted average period for recognition	3 years 4 months
Restricted stock | Employees and Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock appreciation rights granted (in shares)	60,260	54,724	54,837
Restricted stock | Employees and Directors | Tranche one
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Time vested restricted stock, vesting period	5 years	5 years	5 years
Stock appreciation rights granted (in shares)	51,263	48,288	49,139
Restricted stock | Employees and Directors | Tranche two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Time vested restricted stock, vesting period	2 years	2 years	2 years
Stock appreciation rights granted (in shares)	8,997	6,436	5,698
Restricted stock | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Time vested restricted stock, vesting period	2 years
Restricted stock | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Time vested restricted stock, vesting period	6 years

STOCK-BASED COMPENSATION - Ti_2

STOCK-BASED COMPENSATION - Time Vested Restricted Stock Award Activity (Detail) - Restricted stock - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Shares
Beginning balance (in shares)	112,688	93,366
Stock appreciation rights granted (in shares)		54,724
Forfeited (in shares)	(3,441)	(8,802)
Earned and issued (in shares)	(33,659)	(26,600)
Ending balance (in shares)	135,848	112,688
Weighted Avg Grant Date Fair Value
Beginning balance (in dollars per share)	$ 17.28	$ 14.75
Granted (in dollars per share)	24.01	20.18
Forfeited (in dollars per share)	20.73	15.97
Earned and issued (in dollars per share)	16.75	14.78
Ending balance (in dollars per share)	$ 20.47	$ 17.28

EMPLOYEE BENEFIT PLANS (Details

EMPLOYEE BENEFIT PLANS (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Employee benefit plan requisite minimum age	21 years
Defined benefits plan minimum requisite service period	90 days
Employer matching contributions percentage on employees matching annual salary	4.00%
Employer discretionary contribution amount paid	$ 0
Employers discretionary contribution annual vesting percentage	20.00%
Employers discretionary contribution, vesting period	5 years
Employer matching contributions to the plan	$ 700,000	$ 500,000	$ 400,000
Deferred compensation arrangement with individual distributions paid	2,000
Liability recorded on balance sheet related to plans	$ 1,100,000	$ 700,000
Salary Continuation Agreements
Defined Benefit Plan Disclosure [Line Items]
Deferred compensation arrangement, eligibility age	65 years
Payment period	120 months
Termination age	65 years
Citizens Bancshares, Inc.
Defined Benefit Plan Disclosure [Line Items]
Deferred compensation arrangement with individual distributions paid	$ 5,500

INCOME TAXES - Summary of Expen

INCOME TAXES - Summary of Expense for Income Taxes Included in Consolidated Statement of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Current									$ 2,789	$ 4,003	$ 3,816
Deferred									841	245	(207)
Total income tax expense	$ 807	$ 516	$ 966	$ 1,341	$ 1,492	$ 1,032	$ 877	$ 847	$ 3,630	$ 4,248	$ 3,609

INCOME TAXES - Additional Infor

INCOME TAXES - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Tax expense related to revaluation of deferred tax assets and liabilities	$ 0.3
Operating loss carryforwards	$ 0.7	$ 0.6

INCOME TAXES - Summary of Provi

INCOME TAXES - Summary of Provision for Federal Income Taxes Differs from that Computed by Applying the Federal Statutory Rate (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Tax based on statutory rate									$ 3,619	$ 4,258	$ 3,921
Increase (decrease) resulting from:
Effect of tax-exempt income									(249)	(422)	(273)
Acquisition costs									29	174	0
Historical tax credits									6	10	10
Effect of tax rate change									338	292	0
Other									(113)	(64)	(49)
Total income tax expense	$ 807	$ 516	$ 966	$ 1,341	$ 1,492	$ 1,032	$ 877	$ 847	$ 3,630	$ 4,248	$ 3,609
Effective rate									21.10%	34.10%	31.40%

INCOME TAXES - Summary of Defer

INCOME TAXES - Summary of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Deferred tax liabilities:
Depreciation	$ (2,515)	$ (1,652)	$ (1,650)
FHLB stock dividend	(79)	(28)	(20)
Basis difference in acquired assets and liabilities	(785)	(900)	(276)
Other	(20)	(20)	0
Gross deferred tax liability	(3,399)	(2,600)	(1,946)
Deferred tax assets:
Allowance for loan losses	1,915	1,549	2,150
Provision for other real estate losses	274	155	266
Unrealized loss on available for sale securities	818	418	1,115
Net operating loss carryforward	128	154	299
Deferred compensation	225	302	25
Basis difference in acquired assets and liabilities	442	839	253
Historical tax credit	160	144	243
Employee and director stock awards	306	208	234
Other	276	125	229
Gross deferred tax assets	4,544	3,894	4,814
Net deferred tax asset	$ 1,145	$ 1,294	$ 2,868

FAIR VALUES OF FINANCIAL INST_3

FAIR VALUES OF FINANCIAL INSTRUMENTS - Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt securities, fair value	$ 248,981	$ 216,722
Fair Value, Measurements, Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Equity securities	1,699	842
Derivative financial instruments	622	516
Total assets	251,302	218,080
Fair Value, Measurements, Recurring | Obligations of U.S. government agencies and corporations
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt securities, fair value	7,870	8,168
Fair Value, Measurements, Recurring | Obligations of state and political subdivisions
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt securities, fair value	33,986	35,237
Fair Value, Measurements, Recurring | Corporate bonds
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt securities, fair value	15,509	16,210
Fair Value, Measurements, Recurring | Residential mortgage-backed securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt securities, fair value	134,927	109,478
Fair Value, Measurements, Recurring | Commercial mortgage-backed securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt securities, fair value	56,689	47,629
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Equity securities	1,699	842
Derivative financial instruments	0	0
Total assets	1,699	842
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Obligations of U.S. government agencies and corporations
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt securities, fair value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Obligations of state and political subdivisions
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt securities, fair value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate bonds
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt securities, fair value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Residential mortgage-backed securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt securities, fair value	0	0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial mortgage-backed securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt securities, fair value	0	0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Equity securities	0	0
Derivative financial instruments	622	516
Total assets	229,460	196,370
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Obligations of U.S. government agencies and corporations
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt securities, fair value	7,870	8,168
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Obligations of state and political subdivisions
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt securities, fair value	15,178	15,694
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Corporate bonds
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt securities, fair value	14,174	14,885
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Residential mortgage-backed securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt securities, fair value	134,927	109,478
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Commercial mortgage-backed securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt securities, fair value	56,689	47,629
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Equity securities	0	0
Derivative financial instruments	0	0
Total assets	20,143	20,868
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Obligations of U.S. government agencies and corporations
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt securities, fair value	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Obligations of state and political subdivisions
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt securities, fair value	18,808	19,543
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Corporate bonds
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt securities, fair value	1,335	1,325
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Residential mortgage-backed securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt securities, fair value	0	0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Commercial mortgage-backed securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Debt securities, fair value	$ 0	$ 0

FAIR VALUES OF FINANCIAL INST_4

FAIR VALUES OF FINANCIAL INSTRUMENTS - Summary of Assets Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, beginning balance	$ 20,868,000	$ 18,280,000
Realized gains (losses) included in net income	0	0
Unrealized gains included in other comprehensive income	(618,000)	1,266,000
Purchases	0	700,000
Acquired		622,000
Sales	0	0
Maturities, prepayments, and calls	(107,000)	0
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Fair value, ending balance	20,143,000	20,868,000
Obligations of state and political subdivisions
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, beginning balance	19,543,000	17,656,000
Realized gains (losses) included in net income	0	0
Unrealized gains included in other comprehensive income	(628,000)	1,265,000
Purchases	0	0
Acquired		622,000
Sales	0	0
Maturities, prepayments, and calls	(107,000)	0
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Fair value, ending balance	18,808,000	19,543,000
Corporate bonds
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, beginning balance	1,325,000	624,000
Realized gains (losses) included in net income	0	0
Unrealized gains included in other comprehensive income	10,000	1,000
Purchases	0	700,000
Acquired		0
Sales	0	0
Maturities, prepayments, and calls	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Fair value, ending balance	$ 1,335,000	$ 1,325,000

FAIR VALUES OF FINANCIAL INST_5

FAIR VALUES OF FINANCIAL INSTRUMENTS - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Liabilities measured at fair value on a recurring basis	$ 0	$ 0	$ 0
Realized gains (losses) included in net income	0	0
Liabilities measured on a nonrecurring basis	$ 0	$ 0

FAIR VALUES OF FINANCIAL INST_6

FAIR VALUES OF FINANCIAL INSTRUMENTS - Summary of Assets Measured at Fair Value on a Nonrecurring Basis (Detail) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Impaired loans	$ 383	$ 380
Other real estate owned	$ 3,270	$ 3,612
Impaired loans | Minimum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Discount rate	0.00%	0.00%
Impaired loans | Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Discount rate	100.00%	100.00%
Impaired loans | Weighted Average Discount
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Discount rate	15.00%	32.00%
Other real estate owned
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Discount rate	15.00%	5.00%
Other real estate owned | Weighted Average Discount
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Discount rate	15.00%	5.00%

FAIR VALUES OF FINANCIAL INST_7

FAIR VALUES OF FINANCIAL INSTRUMENTS - Summary of Estimated Fair Values of Company's Financial Instruments (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financial liabilities:
Junior subordinated debt	$ 5,845	$ 5,792
Carrying Amount
Financial assets:
Cash and due from banks	17,134	30,421
Investment securities	265,047	235,561
Federal funds sold	6
Equity securities	13,562	9,798
Loans, net of allowance	1,391,371	1,250,888
Derivative financial instruments	622	516
Financial liabilities:
Deposits, noninterest-bearing	217,457	216,599
Deposits, interest-bearing	1,144,274	1,008,638
FHLB short-term advances and repurchase agreements	205,399	148,535
FHLB long-term advances	3,090	40,058
Junior subordinated debt	5,845	5,792
Subordinated debt	18,600
Other borrowings		18,600
Estimated Fair Value
Financial assets:
Cash and due from banks	17,134	30,421
Investment securities	264,786	235,511
Federal funds sold	6
Equity securities	13,562	9,799
Loans, net of allowance	1,374,292	1,249,844
Derivative financial instruments	622	516
Financial liabilities:
Deposits, noninterest-bearing	217,457	216,599
Deposits, interest-bearing	1,095,639	977,127
FHLB short-term advances and repurchase agreements	205,399	148,535
FHLB long-term advances	2,712	39,927
Junior subordinated debt	7,420	5,576
Subordinated debt	19,187
Other borrowings		18,857
Quoted Prices in Active Markets for Identical Assets (Level 1) | Estimated Fair Value
Financial assets:
Cash and due from banks	17,134	30,421
Investment securities	0	842
Federal funds sold	6
Equity securities	1,699	0
Loans, net of allowance	0	0
Derivative financial instruments	0	0
Financial liabilities:
Deposits, noninterest-bearing	0	0
Deposits, interest-bearing	0	0
FHLB short-term advances and repurchase agreements	0	0
FHLB long-term advances	0	0
Junior subordinated debt	0	0
Subordinated debt	0
Other borrowings		0
Significant Other Observable Inputs (Level 2) | Estimated Fair Value
Financial assets:
Cash and due from banks	0	0
Investment securities	234,053	201,946
Federal funds sold	0
Equity securities	11,863	9,799
Loans, net of allowance	0	0
Derivative financial instruments	622	516
Financial liabilities:
Deposits, noninterest-bearing	217,457	216,599
Deposits, interest-bearing	0	0
FHLB short-term advances and repurchase agreements	205,399	148,535
FHLB long-term advances	0	0
Junior subordinated debt	0	0
Subordinated debt	19,187
Other borrowings		18,857
Significant Unobservable Inputs (Level 3) | Estimated Fair Value
Financial assets:
Cash and due from banks	0	0
Investment securities	30,733	32,723
Federal funds sold	0
Equity securities	0	0
Loans, net of allowance	1,374,292	1,249,844
Derivative financial instruments	0	0
Financial liabilities:
Deposits, noninterest-bearing	0	0
Deposits, interest-bearing	1,095,639	977,127
FHLB short-term advances and repurchase agreements	0	0
FHLB long-term advances	2,712	39,927
Junior subordinated debt	7,420	5,576
Subordinated debt	$ 0
Other borrowings		$ 0

REGULATORY MATTERS - Summary of

REGULATORY MATTERS - Summary of Actual Capital Amounts and Ratios (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Tier 1 leverage capital, Capital Adequacy Ratio	5.00%
Tier 1 risk-based capital, Capital Adequacy Ratio	8.00%
Total risk-based capital, Capital Adequacy Ratio	10.00%
Investar Holding Corporation
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Tier 1 leverage capital, Actual Amount	$ 172,050	$ 161,438
Tier 1 common equity risk-based capital, Actual Amount	165,550	154,938
Tier 1 risk-based capital, Actual Amount	172,050	161,438
Total risk-based capital, Actual Amount	$ 199,786	$ 187,530
Tier 1 leverage capital, Actual Ratio	9.81%	10.66%
Tier 1 common equity risk-based capital, Actual Ratio	11.15%	11.75%
Tier 1 risk-based capital, Actual Ratio	11.59%	12.24%
Total risk-based capital, Actual Ratio	13.46%	14.22%
Tier 1 leverage capital, Capital Adequacy Amount	$ 70,121	$ 60,579
Tier 1 common equity risk-based capital, Capital Adequacy Amount	66,800	59,352
Tier 1 risk-based capital, Capital Adequacy Amount	89,066	79,136
Total risk-based capital, Capital Adequacy Amount	$ 118,755	$ 105,514
Tier 1 leverage capital, Capital Adequacy Ratio	4.00%	4.00%
Tier 1 common equity risk-based capital, Capital Adequacy Ratio	4.50%	4.50%
Tier 1 risk-based capital, Capital Adequacy Ratio	6.00%	6.00%
Total risk-based capital, Capital Adequacy Ratio	8.00%	8.00%
Investar Bank
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Tier 1 leverage capital, Actual Amount	$ 187,735	$ 175,943
Tier 1 common equity risk-based capital, Actual Amount	187,735	175,943
Tier 1 risk-based capital, Actual Amount	187,735	175,943
Total risk-based capital, Actual Amount	$ 197,256	$ 183,867
Tier 1 leverage capital, Actual Ratio	10.72%	11.63%
Tier 1 common equity risk-based capital, Actual Ratio	12.67%	13.35%
Tier 1 risk-based capital, Actual Ratio	12.67%	13.35%
Total risk-based capital, Actual Ratio	13.31%	13.95%
Tier 1 leverage capital, Capital Adequacy Amount	$ 70,056	$ 60,534
Tier 1 common equity risk-based capital, Capital Adequacy Amount	66,703	59,294
Tier 1 risk-based capital, Capital Adequacy Amount	88,937	79,059
Total risk-based capital, Capital Adequacy Amount	$ 118,583	$ 105,411
Tier 1 leverage capital, Capital Adequacy Ratio	4.00%	4.00%
Tier 1 common equity risk-based capital, Capital Adequacy Ratio	4.50%	4.50%
Tier 1 risk-based capital, Capital Adequacy Ratio	6.00%	6.00%
Total risk-based capital, Capital Adequacy Ratio	8.00%	8.00%
Tier 1 leverage capital, Well Capitalized Amount	$ 87,570	$ 75,668
Tier 1 common equity risk-based capital, Well Capitalized Amount	96,349	85,647
Tier 1 risk-based capital, Well Capitalized Amount	118,583	105,411
Total risk-based capital, Well Capitalized Amount	$ 148,229	$ 131,764
Tier 1 leverage capital, Well Capitalized Ratio	5.00%	5.00%
Tier 1 common equity risk-based capital, Well Capitalized Ratio	6.50%	6.50%
Tier 1 risk-based capital, Well Capitalized Ratio	8.00%	8.00%
Total risk-based capital, Well Capitalized Ratio	10.00%	10.00%

REGULATORY MATTERS - Summary _2

REGULATORY MATTERS - Summary of Thresholds Established for Institution to be Deemed Adequately Capitalized (Detail)	Dec. 31, 2018
Banking and Thrift [Abstract]
Total Risk-Based Capital Ratio	10.00%
Tier 1 Risk-Based Capital Ratio	8.00%
Common Equity Tier 1 Capital Ratio	6.50%
Tier 1 Leverage Ratio	5.00%

COMMITMENTS AND CONTINGENCIES -

COMMITMENTS AND CONTINGENCIES - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2014
Loss Contingencies [Line Items]
Reserve for unfunded loan commitments	$ 66,000	$ 32,000
Commitment to fund investment in SBIC qualified funds	100,000
Change in the fair value of equity securities	0	0	$ 11,000
Variable Interest Entity, Not Primary Beneficiary
Loss Contingencies [Line Items]
Change in the fair value of equity securities	0
Historic tax credits generated from investments				$ 1,000,000
Variable Interest Entity, Not Primary Beneficiary | Other Assets
Loss Contingencies [Line Items]
Investment recorded	200,000	200,000
Investment	$ 900,000	$ 900,000
Letter of credit
Loss Contingencies [Line Items]
Letters of credit expiration period	1 year

COMMITMENTS AND CONTINGENCIES_2

COMMITMENTS AND CONTINGENCIES - Summary of Commitments to Extend Credit (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Standby letters of credit
Loss Contingencies [Line Items]
Commitments to extend credit	$ 11,114	$ 3,832
Loan commitments
Loss Contingencies [Line Items]
Commitments to extend credit	$ 263,002	$ 174,278

COMMITMENTS AND CONTINGENCIES_3

COMMITMENTS AND CONTINGENCIES - Schedule of Future Minimum Rental Payments for Operating Leases (Details) $ in Thousands	Dec. 31, 2018USD ($)
Commitments and Contingencies Disclosure [Abstract]
2019	$ 80
2020	120
2021	120
2022	120
2023	120
Thereafter	890
Total	$ 1,450

TRANSACTIONS WITH RELATED PAR_2

TRANSACTIONS WITH RELATED PARTIES (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
JCD
Related Party Transaction [Line Items]
Transaction with related parties	$ 0.6	$ 0.4	$ 1.6

PARENT ONLY BALANCE SHEETS, S_3

PARENT ONLY BALANCE SHEETS, STATEMENTS OF OPERATIONS AND STATEMENTS OF CASH FLOWS - Parent Company Balance Sheets (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
ASSETS
Cash and due from banks	$ 15,922	$ 19,619
Equity securities	248,981	217,564
Trademark intangible	100	100
Deferred tax asset	1,145	1,294
Other assets	5,165	5,550
Total assets	1,786,469	1,622,734
LIABILITIES
Subordinated debt, net of unamortized issuance costs	18,215	18,168
Junior subordinated debt	5,845	5,792
Total liabilities	1,604,207	1,450,005
STOCKHOLDERS’ EQUITY
Common stock	9,484	9,515
Surplus	130,133	131,582
Retained earnings	45,721	33,203
Accumulated other comprehensive loss	(3,076)	(1,571)
Total stockholders’ equity	182,262	172,729	$ 112,757	$ 109,350
Total liabilities and stockholders’ equity	1,786,469	1,622,734
Investar Holding Corporation
ASSETS
Cash and due from banks	604	2,134
Equity securities	1,232	364
Accounts receivable	26	27
Due from bank subsidiary	451	759
Investment in bank subsidiary	204,347	193,654
Investment in trust	202	202
Investment in tax credit entity	169	169
Trademark intangible	100	100
Deferred tax asset	52	0
Other assets	81	24
Total assets	207,264	197,433
LIABILITIES
Subordinated debt, net of unamortized issuance costs	18,215	18,168
Junior subordinated debt	5,845	5,792
Accounts payable	124	95
Accrued interest payable	292	290
Dividend payable	484	312
Due to bank subsidiary	42	0
Deferred tax liability	0	47
Total liabilities	25,002	24,704
STOCKHOLDERS’ EQUITY
Common stock	9,484	9,515
Surplus	130,133	131,582
Retained earnings	45,721	33,203
Accumulated other comprehensive loss	(3,076)	(1,571)
Total stockholders’ equity	182,262	172,729
Total liabilities and stockholders’ equity	$ 207,264	$ 197,433

PARENT ONLY BALANCE SHEETS, S_4

PARENT ONLY BALANCE SHEETS, STATEMENTS OF OPERATIONS AND STATEMENTS OF CASH FLOWS - Parent Company Statements of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue
Change in the fair value of equity securities									$ (267)	$ 0	$ 0
Expense
Interest on borrowings									5,127	2,779	1,231
Acquisition expense									1,445	1,868	0
Income tax benefit	$ (807)	$ (516)	$ (966)	$ (1,341)	$ (1,492)	$ (1,032)	$ (877)	$ (847)	(3,630)	(4,248)	(3,609)
Net income	$ 3,337	$ 4,047	$ 3,820	$ 2,402	$ 2,284	$ 2,131	$ 1,923	$ 1,864	13,606	8,202	$ 7,880
Investar Holding Corporation
Revenue
Dividends received from bank subsidiary									4,000	50,200
Dividends on corporate stock									6	6
Gain on sale of equity securities, net									0	52
Change in the fair value of equity securities									(265)	0
Interest income from investment in trust									8	4
Total revenue									3,749	50,262
Expense
Interest on borrowings									1,486	1,017
Management fees to bank subsidiary									335	310
Acquisition expense									39	452
Other expense									454	449
Total expense									2,314	2,228
Income before income taxes and equity in undistributed income of bank subsidiary									1,435	48,034
Equity in undistributed income (loss) of bank subsidiary									11,644	(40,606)
Income tax benefit									527	774
Net income									$ 13,606	$ 8,202

PARENT ONLY BALANCE SHEETS, S_5

PARENT ONLY BALANCE SHEETS, STATEMENTS OF OPERATIONS AND STATEMENTS OF CASH FLOWS - Parent Company Statement of Cash Flows (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities
Net income	$ 3,337	$ 4,047	$ 3,820	$ 2,402	$ 2,284	$ 2,131	$ 1,923	$ 1,864	$ 13,606	$ 8,202	$ 7,880
Adjustments to reconcile net loss to net cash provided by operating activities:
Change in the fair value of equity securities									267	0	0
Net change in:
Other assets									995	(639)	581
Accrued other liabilities									(2,582)	(2,274)	(2,164)
Net cash provided by operating activities									16,412	9,457	37,304
Cash flows from investing activities
Purchases of securities available for sale									(72,258)	(104,209)	(87,340)
Proceeds from sales of investment securities available for sale									7,021	106,448	15,515
Cash paid for acquisitions, net of cash acquired									0	(1,235)	0
Net cash used in investing activities									(182,401)	(98,348)	(151,966)
Cash flows from financing activities
Repayment of borrowings									0	(1,078)	0
Cash dividends paid on common stock									(1,468)	(722)	(278)
Proceeds from public offering of common stock, net of issuance costs									0	32,509	0
Payment to repurchase common stock									(3,368)	(506)	(3,473)
Proceeds from stock options and warrants exercised									1,036	1,172	165
Proceeds from subordinated debt, net of costs									0	18,133	0
Net cash provided by (used in) financing activities									152,708	89,864	123,144
Net (decrease) increase in cash and cash equivalents									(13,281)	973	8,482
Cash and cash equivalents, beginning of period				30,421				29,448	30,421	29,448	20,966
Cash and cash equivalents, end of period	17,140				30,421				17,140	30,421	29,448
Cash payments for:
Interest on borrowings									16,139	10,201	8,294
Investar Holding Corporation
Cash flows from operating activities
Net income									13,606	8,202
Adjustments to reconcile net loss to net cash provided by operating activities:
Equity in undistributed loss (earnings) of bank subsidiary									(11,644)	40,606
Gain on sale of available for sale securities									0	(52)
Change in the fair value of equity securities									265	0
Amortization of debt costs and purchase accounting adjustments									100	40
Net change in:
Due from bank subsidiary									307	(494)
Other assets									(13)	36
Deferred tax asset									(99)	(22)
Accrued other liabilities									890	890
Net cash provided by operating activities									3,412	49,206
Cash flows from investing activities
Capital contributed to bank subsidiary									0	(48,400)
Purchases of securities available for sale									(2,189)	(492)
Proceeds from sales of investment securities available for sale									1,047	409
Cash paid for acquisitions, net of cash acquired									0	(49,213)
Net cash used in investing activities									(1,142)	(97,696)
Cash flows from financing activities
Repayment of borrowings									0	(1,000)
Cash dividends paid on common stock									(1,468)	(722)
Proceeds from public offering of common stock, net of issuance costs									0	32,509
Payment to repurchase common stock									(3,368)	(506)
Proceeds from stock options and warrants exercised									1,036	1,172
Proceeds from subordinated debt, net of costs									0	18,133
Net cash provided by (used in) financing activities									(3,800)	49,586
Net (decrease) increase in cash and cash equivalents									(1,530)	1,096
Cash and cash equivalents, beginning of period				$ 2,134				$ 1,038	2,134	1,038
Cash and cash equivalents, end of period	$ 604				$ 2,134				604	2,134	$ 1,038
Cash payments for:
Interest on borrowings									$ 1,484	$ 732

EARNINGS PER SHARE - Computatio

EARNINGS PER SHARE - Computation of Basic and Diluted Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings per common share - basic
Net income allocated to common shareholders									$ 13,414	$ 8,092	$ 7,880
Weighted-average basic shares outstanding (in shares)									9,538,891	8,399,584	7,107,187
Basic earnings per share (in dollars per share)	$ 0.35	$ 0.42	$ 0.39	$ 0.25	$ 0.25	$ 0.24	$ 0.22	$ 0.26	$ 1.41	$ 0.96	$ 1.11
Earnings per common share - diluted
Net income allocated to common shareholders									$ 13,417	$ 8,092	$ 7,880
Weighted-average basic shares outstanding (in shares)									9,538,891	8,399,584	7,107,187
Dilutive effect of securities (in shares)									125,952	57,344	42,647
Total weighted average diluted shares outstanding (in shares)									9,664,843	8,456,928	7,149,834
Diluted earnings per share (in dollars per share)	$ 0.34	$ 0.41	$ 0.39	$ 0.25	$ 0.25	$ 0.24	$ 0.22	$ 0.26	$ 1.39	$ 0.96	$ 1.10

EARNINGS PER SHARE - Antidiluti

EARNINGS PER SHARE - Antidilutive Securities Excluded from Computation of Earnings Per Share (Details) - shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted average number of shares that have an antidilutive effect in the calculation of diluted earnings per common share (in dollars per share)	6,306	5,235	10,069
Restricted stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted average number of shares that have an antidilutive effect in the calculation of diluted earnings per common share (in dollars per share)	1,364	1,880	1,737

QUARTERLY RESULTS OF OPERATIO_3

QUARTERLY RESULTS OF OPERATIONS (UNAUDITED) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Total interest income	$ 19,927	$ 18,777	$ 18,009	$ 17,178	$ 15,967	$ 14,442	$ 11,844	$ 11,093	$ 73,891	$ 53,346	$ 43,152
Total interest expense	5,120	4,392	3,689	3,320	3,150	2,904	2,542	2,233	16,521	10,829	8,413
Net interest income	14,807	14,385	14,320	13,858	12,817	11,538	9,302	8,860	57,370	42,517	34,739
Provision for loan losses	593	785	567	625	395	420	375	350	2,570	1,540	2,079
Net interest income after provision for loan losses	14,214	13,600	13,753	13,233	12,422	11,118	8,927	8,510	54,800	40,977	32,660
Gain (loss) on sale of investment securities	(23)	15	22	0	50	27	109	106	14	292	443
Other noninterest income	859	1,202	1,171	1,072	912	1,140	692	779	4,318	3,815	5,468
Noninterest expense	10,906	10,254	10,160	10,562	9,608	9,122	6,928	6,684	41,882	32,342	26,639
Income before income tax expense	4,144	4,563	4,786	3,743	3,776	3,163	2,800	2,711	17,236	12,450	11,489
Income tax expense	807	516	966	1,341	1,492	1,032	877	847	3,630	4,248	3,609
Net income	$ 3,337	$ 4,047	$ 3,820	$ 2,402	$ 2,284	$ 2,131	$ 1,923	$ 1,864	$ 13,606	$ 8,202	$ 7,880
Earnings per common share - basic (in dollars per share)	$ 0.35	$ 0.42	$ 0.39	$ 0.25	$ 0.25	$ 0.24	$ 0.22	$ 0.26	$ 1.41	$ 0.96	$ 1.11
Earnings per common share - diluted (in dollars per share)	$ 0.34	$ 0.41	$ 0.39	$ 0.25	$ 0.25	$ 0.24	$ 0.22	$ 0.26	$ 1.39	$ 0.96	$ 1.10

SUBSEQUENT EVENTS (Details)

SUBSEQUENT EVENTS (Details)	Mar. 01, 2019shares
Mainland | Subsequent Event
Subsequent Event [Line Items]
Merger consideration (in shares)	763,849

Uncategorized Items - istr-2018

Label	Element	Value	[1]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ (5,000)
Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ (5,000)
[1]	Represents the impact of adopting ASU No. 2016-01. See Note 1 to the consolidated financial statements for more information.