First Guaranty Bancshares (FGBI) 10-K 16 Mar 20 2019 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2019	Mar. 13, 2020	Jun. 30, 2019
Document and Entity Information [Abstract]
Entity Registrant Name	First Guaranty Bancshares, Inc.
Entity Central Index Key	0001408534
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			$ 91,413,510
Entity Common Stock, Shares Outstanding		9,741,253
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2019
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Shell Company	false

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands		Dec. 31, 2019	Dec. 31, 2018
Cash and cash equivalents:
Cash and due from banks		$ 66,511	$ 127,416
Federal funds sold		914	549
Cash and cash equivalents		67,425	127,965
Investment securities:
Available for sale, at fair value		340,434	296,977
Held to maturity, at cost (estimated fair value of $86,817 and $104,840, respectively)		86,579	108,326
Investment securities		427,013	405,303
Federal Home Loan Bank stock, at cost		3,308	2,393
Loans held for sale		0	344
Loans, net of unearned income		1,525,490	1,225,268
Less: allowance for loan losses		10,929	10,776
Net loans		1,514,561	1,214,492
Premises and equipment, net		56,464	39,695
Goodwill		12,942	3,472
Intangible assets, net		7,166	3,528
Other real estate, net		4,879	1,138
Accrued interest receivable		8,412	6,716
Other assets		15,046	12,165
Total Assets		2,117,216	1,817,211
Deposits:
Noninterest-bearing demand		325,888	244,516
Interest-bearing demand		635,942	594,359
Savings		135,156	109,958
Time		756,027	680,789
Total deposits		1,853,013	1,629,622
Short-term advances from Federal Home Loan Bank		13,079	0
Repurchase agreements		6,840	0
Accrued interest payable		6,047	3,952
Long-term advances from Federal Home Loan Bank		3,533	0
Senior long-term debt		48,558	19,838
Junior subordinated debentures		14,737	14,700
Other liabilities		5,374	1,815
Total Liabilities		1,951,181	1,669,927
Common stock:
$1 par value - authorized 100,600,000 shares; issued 9,741,253 and 9,687,123 shares	[1]	9,741	9,687
Surplus		110,836	109,788
Retained earnings		43,283	34,947
Accumulated other comprehensive income (loss)		2,175	(7,138)
Total Shareholders' Equity		166,035	147,284
Total Liabilities and Shareholders' Equity		$ 2,117,216	$ 1,817,211
[1]	All share and per share amounts have been restated to reflect the ten percent stock dividend paid December 16, 2019 to shareholders of record as of December 9, 2019.

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	1 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Fair value	$ 86,817	$ 104,840
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	100,600,000	100,600,000
Common stock, shares issued (in shares)	9,741,253	9,687,123
Common stock, dividend paid percentage	10.00%

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Interest Income:
Loans (including fees)		$ 78,886	$ 64,836	$ 54,034
Deposits with other banks		2,956	612	178
Securities (including FHLB stock)		9,800	12,941	13,325
Federal funds sold		1	1	9
Total Interest Income		91,643	78,390	67,546
Interest Expense:
Demand deposits		10,447	8,531	5,526
Savings deposits		527	407	201
Time deposits		17,141	10,690	7,112
Borrowings		1,851	1,738	1,554
Total Interest Expense		29,966	21,366	14,393
Net Interest Income		61,677	57,024	53,153
Less: Provision for loan losses		4,860	1,354	3,822
Net Interest Income after Provision for Loan Losses		56,817	55,670	49,331
Noninterest Income:
Service charges, commissions and fees		2,808	2,988	2,589
ATM and debit card fees		2,254	2,122	1,986
Net (losses) gains on securities		(157)	(1,830)	1,397
Net gains on sale of loans		1,376	278	311
Other		2,018	1,722	2,057
Total Noninterest Income		8,299	5,280	8,340
Noninterest Expense:
Salaries and employee benefits		25,019	22,888	20,113
Occupancy and equipment expense		6,096	5,601	4,505
Other		16,104	14,786	13,903
Total Noninterest Expense		47,219	43,275	38,521
Income Before Income Taxes		17,897	17,675	19,150
Less: Provision for income taxes		3,656	3,462	7,399
Net Income		$ 14,241	$ 14,213	$ 11,751
Per Common Share:
Earnings (in dollars per share)	[1]	$ 1.47	$ 1.47	$ 1.21
Cash dividends paid (in dollars per share)	[1]	$ 0.60	$ 0.58	$ 0.54
Weighted Average Common Shares Outstanding (in shares)		9,695,131	9,687,123	9,687,123
[1]	All share and per share amounts have been restated to reflect the ten percent stock dividend paid December 16, 2019 to shareholders of record as of December 9, 2019.

CONSOLIDATED STATEMENTS OF IN_2

CONSOLIDATED STATEMENTS OF INCOME (Parenthetical)	Dec. 16, 2019	Dec. 31, 2019
Income Statement [Abstract]
Common stock, dividend paid percentage	10.00%	10.00%

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net Income	$ 14,241	$ 14,213	$ 11,751
Unrealized gains (losses) on securities:
Unrealized holding gains (losses) arising during the period	11,435	(8,508)	5,098
Reclassification adjustments for gains (losses) included in net income	353	1,830	(1,397)
Change in unrealized gains (losses) on securities	11,788	(6,678)	3,701
Tax impact	(2,475)	1,402	(1,258)
Other comprehensive income (loss)	9,313	(5,276)	2,443
Comprehensive Income	$ 23,554	$ 8,937	$ 14,194

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands		Total	Common Stock $1 Par	Surplus	Retained Earnings	Accumulated Other Comprehensive Income/(Loss)
Balance at Dec. 31, 2016	[1]	$ 124,349	$ 9,205	$ 97,649	$ 21,494	$ (3,999)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		11,751			11,751
Common stock issued in acquisition, 481,488 shares		10,650	482	12,139	(1,971)
Other comprehensive income (loss)		2,443				2,443
Cash dividends on common stock (in dollars per share)	[1]	(5,210)			(5,210)
Balance at Dec. 31, 2017		143,983	9,687	109,788	26,064	(1,556)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		14,213			14,213
Other comprehensive income (loss)		(5,276)				(5,276)
Cash dividends on common stock (in dollars per share)	[1]	(5,636)			(5,636)
Reclassification of stranded tax effects in accumulated other comprehensive income	[2]				306	(306)
Balance at Dec. 31, 2018		147,284	9,687	109,788	34,947	(7,138)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		14,241			14,241
Other comprehensive income (loss)		9,313				9,313
Cash dividends on common stock (in dollars per share)	[1]	(5,803)			(5,803)
Common stock issued in private placement, 54,130 shares	[1]	1,000	54	1,048	(102)
Balance at Dec. 31, 2019		$ 166,035	$ 9,741	$ 110,836	$ 43,283	$ 2,175
[1]	All share and per share amounts reflect the ten percent stock dividend paid December 16, 2019 to shareholders of record as of December 9, 2019.
[2]	See Note 2 - Recent Accounting Pronouncements

CONSOLIDATED STATEMENTS OF CH_2

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2017
Statement of Stockholders' Equity [Abstract]
Cash dividends paid (in dollars per share)	[1]	$ 0.60	$ 0.54
Common stock issued in acquisition (in shares)			481,488
Common stock issued in private placement (in shares)		54,130
[1]	All share and per share amounts have been restated to reflect the ten percent stock dividend paid December 16, 2019 to shareholders of record as of December 9, 2019.

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash Flows From Operating Activities:
Net income	$ 14,241	$ 14,213	$ 11,751
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	4,860	1,354	3,822
Depreciation and amortization	3,057	3,289	2,444
Amortization/Accretion of investments	1,347	1,445	1,788
Loss (gain) on sale/call of securities	157	1,830	(1,397)
Gain on sale of assets	(1,304)	(301)	(361)
Repossessed asset write downs, gain and losses on dispositions	90	(47)	103
FHLB stock dividends	(63)	(42)	(23)
Net decrease in loans held for sale	344	964	347
Change in other assets and liabilities, net	6,349	4,184	(6,199)
Net Cash Provided by Operating Activities	29,078	26,889	12,275
Cash Flows From Investing Activities:
Proceeds from maturities and calls of HTM securities	21,190	11,197	11,703
Proceeds from maturities, calls and sales of AFS securities	279,590	384,549	542,894
Funds invested in HTM securities	0	0	(30,530)
Funds Invested in AFS securities	(274,437)	(309,346)	(517,185)
Net increase in loans	(123,553)	(76,354)	(80,816)
Purchases of premises and equipment	(11,933)	(3,787)	(6,814)
Proceeds from sales of premises and equipment	12	46	51
Proceeds from sales of other real estate owned	550	484	608
Cash paid in excess of cash received in acquisition	(23,325)	0	(2,907)
Net Cash (Used In) Provided By Investing Activities	(131,906)	6,789	(82,996)
Cash Flows From Financing Activities:
Net increase in deposits	18,408	80,336	95,879
Net decrease in federal funds purchased and short-term borrowings	(28)	(15,500)	(700)
Proceeds from long-term borrowings, net of costs	32,465	0	3,750
Common stock issued in private placement	1,000	0	0
Repayment of long-term borrowings	(3,754)	(2,941)	(3,081)
Dividends paid	(5,803)	(5,636)	(5,210)
Net Cash Provided By Financing Activities	42,288	56,259	90,638
Net (Decrease) Increase In Cash and Cash Equivalents	(60,540)	89,937	19,917
Cash and Cash Equivalents at the Beginning of the Period	127,965	38,028	18,111
Cash and Cash Equivalents at the End of the Period	67,425	127,965	38,028
Noncash Activities:
Acquisition of real estate in settlement of loans	2,789	297	1,374
Common stock issued in acquisition	0	0	10,650
Cash Paid During the Period:
Interest on deposits and borrowed funds	27,871	19,902	13,836
Federal
Cash Paid During the Period:
Income taxes paid	3,250	2,400	10,700
State
Cash Paid During the Period:
Income taxes paid	$ 23	$ 0	$ 0

Business and Summary of Signifi

Business and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Business and Summary of Significant Accounting Policies	Business and Summary of Significant Accounting Policies Business First Guaranty Bancshares, Inc. ("First Guaranty") is a Louisiana corporation headquartered in Hammond, LA. First Guaranty owns all of the outstanding shares of common stock of First Guaranty Bank. First Guaranty Bank (the "Bank") is a Louisiana state-chartered commercial bank that provides a diversified range of financial services to consumers and businesses in the communities in which it operates. These services include consumer and commercial lending, mortgage loan origination, the issuance of credit cards and retail banking services. The Bank also maintains an investment portfolio comprised of government, government agency, corporate, and municipal securities. The Bank has thirty-four banking offices, including one drive-up banking facility, and forty-eight automated teller machines (ATMs) in Southeast Louisiana, Southwest Louisiana, Central Louisiana, North Louisiana and North Central Texas. Summary of significant accounting policies The accounting and reporting policies of First Guaranty conform to generally accepted accounting principles and to predominant accounting practices within the banking industry. The more significant accounting and reporting policies are as follows: Consolidation The consolidated financial statements include the accounts of First Guaranty Bancshares, Inc., and its wholly owned subsidiary, First Guaranty Bank. All significant intercompany balances and transactions have been eliminated in consolidation. Acquisition Accounting Acquisitions are accounted for under the purchase method of accounting. Purchased assets, including identifiable intangibles, and assumed liabilities are recorded at their respective acquisition date fair values. If the fair value of net assets purchased exceeds the consideration given, a gain on acquisition is recognized. If the consideration given exceeds the fair value of the net assets received, goodwill 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 estimated fair value on their purchase date with no carryover of the related allowance for loan losses. See Acquired Loans section below for accounting policy regarding loans acquired in a business combination. Use of estimates The preparation of financial statements in conformity with generally accepted accounting principles requires Management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the dates of the financial statements and the reported amounts of revenue and expense during the reporting periods. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change in the near-term relate to the determination of the allowance for loan losses, the valuation of real estate acquired in connection with foreclosures or in satisfaction of loans, and the valuation of investment securities. In connection with the determination of the allowance for loan losses and real estate owned, First Guaranty obtains independent appraisals for significant properties. Cash and cash equivalents For purposes of reporting cash flows, cash and cash equivalents are defined as cash, due from banks, interest-bearing demand deposits with banks and federal funds sold with maturities of three months or less. Securities First Guaranty reviews its financial position, liquidity and future plans in evaluating the criteria for classifying investment securities. Debt securities that Management has the ability and intent to hold to maturity are classified as held to maturity and carried at cost, adjusted for amortization of premiums and accretion of discounts using methods approximating the interest method. Securities available for sale are stated at fair value. The unrealized difference, if any, between amortized cost and fair value of these AFS securities is excluded from income and is reported, net of deferred taxes, in accumulated other comprehensive income as a part of shareholders' equity. Details of other comprehensive income are reported in the consolidated statements of comprehensive income. Realized gains and losses on securities are computed based on the specific identification method and are reported as a separate component of other income. Amortization of premiums and discounts is included in interest income. Discounts and premiums related to debt securities are amortized using the effective interest rate method. Management evaluates securities for other-than-temporary impairment ("OTTI") at least on a quarterly basis, and more frequently when economic or market conditions warrant such an evaluation. In estimating other-than-temporary losses, management considers the length of time and extent that fair value has been less than cost and the financial condition and near term prospects of the issuer. Management also assesses whether it intends to sell, or it is more likely than not that it will be required to sell, a security in an unrealized loss position before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the entire difference between amortized cost and fair value is recognized as impairment through earnings. For debt securities that do not meet the aforementioned criteria, the amount of impairment is split into two components as follows: 1) OTTI related to credit loss, which must be recognized in the income statement and 2) OTTI related to other factors, which is recognized in other comprehensive income. The credit loss is defined as the difference between the present value of the cash flows expected to be collected and the amortized cost basis. Loans held for sale Mortgage loans originated and intended for sale in the secondary market are carried at the lower of cost or estimated fair value in the aggregate. Net unrealized losses, if any, are recognized through a valuation allowance by charges to income. Loans held for sale have primarily been fixed rate single-family residential mortgage loans under contract to be sold in the secondary market. In most cases, loans in this category are sold within thirty days. Buyers generally have recourse to return a purchased loan under limited circumstances. Recourse conditions may include early payment default, breach of representations or warranties and documentation deficiencies. Mortgage loans held for sale are generally sold with the mortgage servicing rights released. Gains or losses on sales of mortgage loans are recognized based on the differences between the selling price and the carrying value of the related mortgage loans sold. Loans Loans are stated at the principal amounts outstanding, net of unearned income and deferred loan fees. In addition to loans issued in the normal course of business, overdrafts on customer deposit accounts are considered to be loans and reclassified as such. Interest income on all classifications of loans is calculated using the simple interest method on daily balances of the principal amount outstanding. Accrual of interest is discontinued on a loan when Management believes, after considering economic and business conditions and collection efforts, the borrower's financial condition is such that reasonable doubt exists as to the full and timely collection of principal and interest. This evaluation is made for all loans that are 90 days or more contractually past due. When a loan is placed in nonaccrual status, all interest previously accrued but not collected is reversed against current period interest income. Income on such loans is then recognized only to the extent that cash is received and where the future collection of interest and principal is probable. Loans are returned to accrual status when, in the judgment of Management, all principal and interest amounts contractually due are reasonably assured to be collected within a reasonable time frame and when the borrower has demonstrated payment performance of cash or cash equivalents; generally for a period of 6 months . All loans, except mortgage loans, are considered past due if they are past due 30 days. Mortgage loans are considered past due when two consecutive payments have been missed. Loans that are past due 90 - 120 days and deemed uncollectible are charged-off. The loan charge off is a reduction of the allowance for loan losses. Troubled Debt Restructurings (TDRs) TDRs are loans in which the borrower is experiencing financial difficulty at the time of restructuring, and the Bank has granted a concession to the borrower. TDRs are undertaken in order to improve the likelihood of recovery on the loan and may take the form of modifications made with the stated interest rate lower than the current market rate for new debt with similar risk, other modifications to the structure of the loan that fall outside of normal underwriting policies and procedures, or in limited circumstances forgiveness of principal and / or interest. TDRs can involve loans remaining on non-accrual, moving to non-accrual, or continuing on accrual status, depending on the individual facts and circumstances of the borrower. TDRs are subject to policies governing accrual and non-accrual evaluation consistent with all other loans as discussed in the "Loans" section above. All loans with the TDR designation are considered to be impaired, even if they are accruing. First Guaranty's policy is to evaluate TDRs that have subsequently been restructured and returned to market terms after 6 months of performance. The evaluation includes a review of the loan file and analysis of the credit to assess the loan terms, including interest rate to insure such terms are consistent with market terms. The loan terms are compared to a sampling of loans with similar terms and risk characteristics, including loans originated by First Guaranty and loans lost to a competitor. The sample provides a guide to determine market terms pursuant to ASC 310-40-50-2. The loan is also evaluated at that time for impairment. A loan determined to be restructured to market terms and not considered impaired will no longer be disclosed as a TDR in the years following the restructuring. These loans will continue to be individually evaluated for impairment. A loan determined to either be restructured to below market terms or to be impaired will remain a TDR. Credit Quality First Guaranty's credit quality indicators are pass, special mention, substandard, and doubtful. Loans included in the pass category are performing loans with satisfactory debt coverage ratios, collateral, payment history, and documentation requirements. Special mention loans have potential weaknesses that deserve close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects. Borrowers may be experiencing adverse operating trends (declining revenues or margins) or an ill proportioned balance sheet (e.g., increasing inventory without an increase in sales, high leverage, tight liquidity). Adverse economic or market conditions, such as interest rate increases or the entry of a new competitor, may also support a special mention rating. Nonfinancial reasons include management problems, pending litigation, an ineffective loan agreement or other material structural weakness, and any other significant deviation from prudent lending practices. A substandard loan is inadequately protected by the paying capacity of the obligor or of the collateral pledged, if any. Loans classified as substandard have a well-defined weakness. They are characterized by the distinct possibility that First Guaranty will sustain some loss if the deficiencies are not corrected. These loans require more intensive supervision. Substandard loans are generally characterized by current or expected unprofitable operations, inadequate debt service coverage, inadequate liquidity, or marginal capitalization. Repayment may depend on collateral or other credit risk mitigates. For some substandard loans, the likelihood of full collection of interest and principal may be in doubt and interest is no longer accrued. Consumer loans that are 90 days or more past due or that are nonaccrual are considered substandard. Doubtful loans have the weaknesses of substandard loans with the additional characteristic that the weaknesses make collection or liquidation in full questionable and there is a high probability of loss based on currently existing facts, conditions and values. A loan is considered impaired when, based on current information and events, it is probable that First Guaranty will be unable to collect the scheduled payments of principal or interest when 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. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower's prior payment record and the amount of the shortfall in relation to the principal and interest owed. Impairment is measured on a loan-by-loan basis for commercial and construction loans by either the present value of expected future cash flows discounted at the loan's effective interest rate, the loan's obtainable market price or the fair value of the collateral if the loan is collateral dependent. This process is only applied to impaired loans or relationships in excess of $500,000 . Large groups of smaller balance homogeneous loans are collectively evaluated for impairment. Accordingly, individual consumer and residential loans are not separately identified for impairment disclosures, unless such loans are the subject of a restructuring agreement. Loans that have been restructured in a troubled debt restructuring will continue to be evaluated individually for impairment, including those no longer requiring disclosure. Acquired Loans Loans are recorded at estimated fair value on their purchase date with no carryover of the related allowance for loan losses. Acquired loans are segregated between those with deteriorated credit quality at acquisition and those deemed as performing. To make this determination, Management considers such factors as past due status, nonaccrual status, credit risk ratings, interest rates and collateral position. The fair value of acquired loans deemed performing is determined by discounting cash flows, both principal and interest, for each pool at prevailing market interest rates as well as consideration of inherent potential losses. The difference between the fair value and principal balances due at acquisition date, the fair value discount, is accreted into income over the estimated life of each loan pool. Loans acquired in a business combination are recorded at their estimated fair value on their purchase date with no carryover of the related allowance for loan losses. Performing acquired loans are subsequently evaluated for any required allowance at each reporting date. An allowance for loan losses is calculated using a similar methodology for originated loans. Loan fees and costs Nonrefundable loan origination and commitment fees and direct costs associated with originating loans are deferred and recognized over the lives of the related loans as an adjustment to the loans' yield using the level yield method. Allowance for loan losses The allowance for loan losses is established through a provision for loan losses charged to expense. Loans are charged against the allowance for loan losses when Management believes that the collectability of the principal is unlikely. The allowance, which is based on evaluation of the collectability of loans and prior loan loss experience, is an amount that, in the opinion of Management, reflects the risks inherent in the existing loan portfolio and exists at the reporting date. The evaluations take into consideration a number of subjective factors including changes in the nature and volume of the loan portfolio, historical losses, overall portfolio quality, review of specific problem loans, current economic conditions that may affect a borrower's ability to pay, adequacy of loan collateral and other relevant factors. In addition, regulatory agencies, as an integral part of their examination process, periodically review the estimated losses on loans. Such agencies may require additional recognition of losses based on their judgments about information available to them at the time of their examination. The following are general credit risk factors that affect First Guaranty's loan portfolio segments. These factors do not encompass all risks associated with each loan category. Construction and land development loans have risks associated with interim construction prior to permanent financing and repayment risks due to the future sale of developed property. Farmland and agricultural loans have risks such as weather, government agricultural policies, fuel and fertilizer costs, and market price volatility. 1-4 family, multi-family, and consumer credits are strongly influenced by employment levels, consumer debt loads and the general economy. Non-farm non-residential loans include both owner occupied real estate and non-owner occupied real estate. Common risks associated with these properties is the ability to maintain tenant leases and keep lease income at a level able to service required debt and operating expenses. Commercial and industrial loans generally have non-real estate secured collateral which requires closer monitoring than real estate collateral. Although Management uses available information to recognize losses on loans, because of uncertainties associated with local economic conditions, collateral values and future cash flows on impaired loans, it is reasonably possible that a material change could occur in the allowance for loan losses in the near term. However, the amount of the change that is reasonably possible cannot be estimated. The evaluation of the adequacy of loan collateral is often based upon estimates and appraisals. Because of changing economic conditions, the valuations determined from such estimates and appraisals may also change. Accordingly, First Guaranty may ultimately incur losses that vary from Management's current estimates. Adjustments to the allowance for loan losses will be reported in the period such adjustments become known or can be reasonably estimated. All loan losses are charged to the allowance for loan losses when the loss actually occurs or when the collectability of the principal is unlikely. Recoveries are credited to the allowance at the time of recovery. The allowance consists of specific, general, and unallocated components. The specific component relates to loans that are classified as doubtful, substandard, and impaired. For such loans that are also 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. Also, a specific reserve is allocated for syndicated loans. The general component covers non-classified loans and special mention loans and is based on historical loss experience adjusted for qualitative factors. An unallocated component is maintained to cover uncertainties that could affect the estimate of probable losses. The allowance for loan losses is reviewed on a monthly basis. The monitoring of credit risk also extends to unfunded credit commitments, such as unused commercial credit lines and letters of credit. A reserve is established as needed for estimates of probable losses on such commitments. Goodwill and intangible assets Goodwill and intangible assets deemed to have indefinite lives are subject to annual impairment tests. First Guaranty's goodwill is tested for impairment on an annual basis, or more often if events or circumstances indicate that there may be impairment. Adverse changes in the economic environment, declining operations, or other factors could result in a decline in the implied fair value of goodwill. If the implied fair value is less than the carrying amount, a loss would be recognized in other non-interest expense to reduce the carrying amount to implied fair value of goodwill. The goodwill impairment test includes two steps that are preceded by a, "step zero", qualitative test. The qualitative test allows Management to assess whether qualitative factors indicate that it is more likely than not that impairment exists. If it is not more likely than not that impairment exists, then no impairment exists and the two step quantitative test would not be necessary. These qualitative indicators include factors such as earnings, share price, market conditions, etc. If the qualitative factors indicate that it is more likely than not that impairment exists, then the two step quantitative test would be necessary. Step one is used to identify potential impairment and compares the estimated fair value of a reporting unit with its carrying amount, including goodwill. If the estimated fair value of a reporting unit exceeds its carrying amount, goodwill of the reporting unit is not considered impaired. If the carrying amount of a reporting unit exceeds its estimated fair value, the second step of the goodwill impairment test is performed to measure the amount of impairment loss, if any. Step two of the goodwill impairment test compares the implied estimated fair value of reporting unit goodwill with the carrying amount of that goodwill. If the carrying amount of goodwill for that reporting unit exceeds the implied fair value of that unit's goodwill, an impairment loss is recognized in an amount equal to that excess. Identifiable intangible assets are acquired assets that lack physical substance but can be distinguished from goodwill because of contractual or legal rights or because the assets are capable of being sold or exchanged either on their own or in combination with the related contract, asset or liability. First Guaranty's intangible assets primarily relate to core deposits and loan servicing assets related to the SBA portfolio. These core deposit intangibles are amortized on a straight-line basis over terms ranging from seven to fifteen years. Management periodically evaluates whether events or circumstances have occurred that impair this deposit intangible. Premises and equipment Premises and equipment are stated at cost, less accumulated depreciation. Depreciation is computed for financial reporting purposes using the straight-line method over the estimated useful lives of the respective assets as follows: Buildings and improvements 10 - 40 years Equipment, fixtures and automobiles 3 - 10 years Expenditures for renewals and betterments are capitalized and depreciated over their estimated useful lives. Repairs, maintenance and minor improvements are charged to operating expense as incurred. Gains or losses on disposition, if any, are recorded as a separate line item in noninterest income on the Statements of Income . Other real estate Other real estate includes properties acquired through foreclosure or acceptance of deeds in lieu of foreclosure. These properties are recorded at the lower of the recorded investment in the property or its fair value less the estimated cost of disposition. Any valuation adjustments required prior to foreclosure are charged to the allowance for loan losses. Subsequent to foreclosure, losses on the periodic revaluation of the property are charged to current period earnings as other real estate expense. Costs of operating and maintaining the properties are charged to other real estate expense as incurred. Any subsequent gains or losses on dispositions are credited or charged to income in the period of disposition . Off-balance sheet financial instruments In the ordinary course of business, First Guaranty has entered into commitments to extend credit, including commitments under credit card arrangements, commitments to fund commercial real estate, construction and land development loans secured by real estate, and performance standby letters of credit. Such financial instruments are recorded when they are funded. Income taxes First Guaranty and its subsidiary file a consolidated federal income tax return on a calendar year basis. In lieu of Louisiana state income tax, the Bank is subject to the Louisiana bank shares tax, which is included in noninterest expense in First Guaranty's consolidated financial statements. With few exceptions, First Guaranty is no longer subject to U.S. federal, state or local income tax examinations for years before 2016. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax basis. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which the deferred tax assets or liabilities are expected to be settled or realized. Valuation allowances are established when necessary to reduce deferred tax assets to the amount expected to be utilized. Comprehensive income Accounting principles generally require that recognized revenue, expenses, gains and losses be included in net income. Although certain changes in assets and liabilities, such as unrealized gains and losses on available for sale securities, are reported as a separate component of the equity section of the balance sheet, such items along with net income, are components of comprehensive income. The components of other comprehensive income and related tax effects are presented in the Statements of Comprehensive Income. Fair Value Measurements The fair value of a financial instrument is the current amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. A fair value measurement assumes that the transaction to sell the asset or transfer the liability occurs in the principal market for the asset or liability or, in the absence of a principal market, the most advantageous market for the asset or liability. Valuation techniques use certain inputs to arrive at fair value. Inputs to valuation techniques are the assumptions that market participants would use in pricing the asset or liability. They may be observable or unobservable. First Guaranty uses a fair value hierarchy for valuation inputs that gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. See Note 20 for a detailed description of fair value measurements. Transfers of Financial Assets Transfers of financial assets are accounted for as sales, when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when (i) the assets have been isolated from First Guaranty, (ii) the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets, and (iii) First Guaranty does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity. Earnings per common share Earnings per share represents income available to common shareholders divided by the weighted average number of common shares outstanding during the period. In December of 2019, First Guaranty issued a pro rata, 10% common stock dividend. The shares issued for the stock dividend have been retrospectively factored into the calculation of earnings per share as well as cash dividends paid on common stock and represented on the face of the financial statements. No convertible shares of First Guaranty's stock are outstanding. Operating Segments All of First Guaranty's operations are considered by management to be aggregated into one reportable operating segment. While the chief decision-makers monitor the revenue streams of the various products and services, the identifiable segments are not material. Operations are managed and financial performance is evaluated on a Company-wide basis. Reclassifications Certain reclassifications have been made to prior year end financial statements in order to conform to the classification adopted for reporting in 2019 .

Recent Accounting Pronouncement

Recent Accounting Pronouncements	12 Months Ended
	Dec. 31, 2019
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements In February 2016, the FASB issued ASU 2016-02, "Leases: Conforming Amendments Related to Leases". This ASU amends the codification regarding leases in order to increase transparency and comparability. The ASU requires companies to recognize lease assets and liabilities on the balance sheet and disclose key information about leasing arrangements. A lessee would recognize a liability to make lease payments and a right-of-use asset representing its right to use the leased asset for the lease term. During 2018 and early 2019, the FASB issued ASU No. 2018-11, "Targeted Improvements", ASU No. 2018-20, "Narrow-Scope Improvements for Lessors", and ASU No. 2019-01, "Codification Improvements", which clarified certain implementation issues, provided an additional optional transition method and clarified the disclosure requirements during the period of adopting ASU 2016-02, among others. The ASU is effective for annual and interim periods beginning after December 15, 2018. First Guaranty adopted this ASU in the first quarter of 2019. As a result of adopting this ASU, First Guaranty established a right-to-use asset and a lease liability as of January 1, 2019 of $0.9 million . The right-to-use asset represents First Guaranty's right to use an underlying asset for the lease term and is included in other assets on First Guaranty's consolidated balance sheets. The lease liability represents First Guaranty's obligation to make lease payments and is included in other liabilities on First Guaranty's consolidated balance sheets. First Guaranty does not expect material changes to the recognition of lease expense in future periods as a result of the adopting this ASU. In June 2016, the FASB issued ASU 2016-13, "Financial Instruments- Credit Losses: Measurement of Credit Losses on Financial Instruments". This ASU amends guidance on reporting credit losses for assets held at amortized cost basis and available for sale debt securities. The ASU amendments require the measurement of all expected credit losses for financial assets held at the reporting date be based on historical experience, current conditions, and reasonable and supportable forecasts. The ASU requires assets held at cost basis to reflect the company's current estimate of all expected credit losses. For available for sale debt securities, credit losses should be presented as an allowance rather than as a write-down. In addition, this ASU amends the accounting for purchased financial assets with credit deterioration. On October 16, 2019, the FASB approved an effective date delay applicable to smaller reporting companies until fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. First Guaranty is currently evaluating the impact of this accounting standard and is implementing a new software application to assist in determining the impact on the Consolidated Financial Statements. In January 2017, the FASB issued ASU 2017-04, "Intangibles - Goodwill and Other: Simplifying the Test for Goodwill Impairment". This ASU amends the guidance on impairment testing. The ASU eliminates Step 2 from the goodwill impairment test. The annual, or interim, goodwill impairment test is performed by comparing the fair value of a reporting unit with its carrying amount. An impairment charge should be recognized for the amount by which the carrying amount exceeds the reporting unit's fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. In addition, income tax effects from any tax deductible goodwill on the carrying amount of the reporting unit should be considered when measuring the goodwill impairment loss, if applicable. The ASU also eliminates the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment and, if it fails that qualitative test, to perform Step 2 of the goodwill impairment test. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. This ASU is effective for annual and interim periods beginning after December 15, 2019. First Guaranty is currently evaluating the impact of the adoption of this guidance on the Consolidated Financial Statements. In August 2018, the FASB issued ASU No. 2018-13, "Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement." This ASU removes, modifies, and adds certain disclosure requirements for fair value measurements. For example, public entities will no longer be required to disclose the valuation processes for Level 3 fair value measurements, but will be required to disclose the range and weighted average used to develop significant unobservable inputs for Level 3 fair value measurements. This ASU is effective for interim and annual reporting periods beginning after December 15, 2019. In addition, entities may early adopt the modified or eliminated disclosure requirements and delay adoption of the additional disclosure requirements until their effective date. First Guaranty does not believe the adoption of this ASU will have a material impact on the Consolidated Financial Statements, as the update only revises disclosure requirements. In December 2019, the FASB issued ASU No. 2019-12, "Income Taxes: Simplifying the Accounting for Income Taxes". This ASU removes specific exceptions to the general principles in Topic 740, Income Taxes. The amendments also improve consistent application of and simplify GAAP for other areas of Topic 740 by clarifying and amending existing guidance. This ASU is effective for annual and interim periods beginning after December 15, 2020, with early adoption in any interim period permitted. First Guaranty is currently evaluating the impact of this accounting standard on the Consolidated Financial Statements.

Merger Transaction

Merger Transaction	12 Months Ended
	Dec. 31, 2019
Business Combinations [Abstract]
Merger Transaction	Merger Transaction Effective at the close of business on November 7, 2019 , First Guaranty completed its acquisition of 100% of the outstanding shares of Union Bancshares, Incorporated, a Louisiana corporation ("Union"), a single bank holding company headquartered in Marksville, Louisiana and its wholly owned subsidiary, Union Bank for $43.4 million in cash. This acquisition allowed First Guaranty to expand its presence into the Central Louisiana market area. The purchase price resulted in approximately $9.5 million in goodwill and $4.2 million in core deposit intangible, none of which is deductible for tax purposes. First Guaranty accounts for business combinations under the acquisition method in accordance with ASC Topic 805, Business Combinations. Accordingly, for each transaction, the purchase price is allocated to the fair value of the assets acquired and liabilities assumed as of the date of the acquisition. In conjunction with the adoption of ASU 2015-16, upon receipt of final fair value estimates during the measurement period, which must be within one year of the acquisition dates, First Guaranty records any adjustments to the preliminary fair value estimates in the reporting period in which the adjustments are determined. First Guaranty is continuing to finalize the purchase price allocations related to the Union acquisition. Based on management's preliminary valuation of tangible and intangible assets acquired and liabilities assumed, the purchase price for the Union acquisition is allocated in the table below. These allocations are subject to change. (in thousands) Union Bancshares, Incorporated Cash and due from banks $ 20,058 Securities available for sale 38,813 Loans 184,165 Premises and equipment 7,223 Goodwill 9,469 Intangible assets 4,213 Other real estate 1,595 Other assets 9,303 Total assets acquired $ 274,839 Deposits 204,983 FHLB borrowings 16,617 Repurchase agreements 6,863 Other liabilities 2,993 Total liabilities assumed $ 231,456 Net assets acquired $ 43,383 The following pro forma information for the twelve months ended December 31, 2019 and December 31, 2018 reflects First Guaranty's estimated consolidated results of operations as if the acquisition of Union occurred at January 1, 2018, unadjusted for potential cost savings. (in thousands, except share data) 2019 2018 Net Interest Income $ 70,105 $ 67,194 Noninterest Income 9,877 7,075 Noninterest Expense 54,482 51,261 Net Income 16,459 17,259 Earnings per common share $ 1.70 $ 1.78 The fair value of net assets acquired includes fair value adjustments to certain receivables that were not considered impaired as of the acquisition date. The non-impaired loans excluded from the purchase credit impairment requirements under ASC 310-30 were recorded at an estimated fair value of $176.9 million and had gross contractual amounts receivable of $174.2 million on the date of acquisition. Contractual cash flows not expected to be collected are estimated at $1.2 million .

Cash and Due from Banks

Cash and Due from Banks	12 Months Ended
	Dec. 31, 2019
Cash and Cash Equivalents [Abstract]
Cash and Due from Banks	Cash and Due from Banks Certain reserves are required to be maintained at the Federal Reserve Bank. There was no reserve requirement as of December 31, 2019 and 2018 . At December 31, 2019 First Guaranty had two accounts at correspondent banks, excluding the Federal Reserve Bank, that exceeded the FDIC insurable limit of $250,000 . The amount of these accounts that were over the insurable limit totaled $5.7 million . At December 31, 2018 First Guaranty had only one account at correspondent banks, excluding the Federal Reserve Bank, that exceeded the FDIC insurable limit of $250,000 . This account was over the insurable limit by $127,000 .

Securities

Securities	12 Months Ended
	Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Securities	Securities A summary comparison of securities by type at December 31, 2019 and 2018 is shown below. December 31, 2019 December 31, 2018 (in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for sale: U.S. Treasuries $ — $ — $ — $ — $ — $ — $ — $ — U.S. Government Agencies 16,380 15 (2 ) 16,393 146,911 — (5,522 ) 141,389 Corporate debt securities 94,561 1,110 (302 ) 95,369 76,310 72 (3,504 ) 72,878 Other securities 497 — — 497 483 — — 483 Municipal bonds 30,297 1,870 (14 ) 32,153 32,956 1,120 (175 ) 33,901 Collateralized mortgage obligations 16,400 40 (43 ) 16,397 918 — (14 ) 904 Mortgage-backed securities 179,546 317 (238 ) 179,625 48,434 — (1,012 ) 47,422 Total available for sale securities $ 337,681 $ 3,352 $ (599 ) $ 340,434 $ 306,012 $ 1,192 $ (10,227 ) $ 296,977 Held to maturity: U.S. Government Agencies $ 18,175 $ — $ (32 ) $ 18,143 $ 28,172 $ — $ (1,081 ) $ 27,091 Municipal bonds 5,107 182 — 5,289 5,227 — (101 ) 5,126 Mortgage-backed securities 63,297 200 (112 ) 63,385 74,927 — (2,304 ) 72,623 Total held to maturity securities $ 86,579 $ 382 $ (144 ) $ 86,817 $ 108,326 $ — $ (3,486 ) $ 104,840 The scheduled maturities of securities at December 31, 2019 , by contractual maturity, are shown below. Actual maturities may differ from contractual maturities due to call or prepayments. Mortgage-backed securities are not due at a single maturity because of amortization and potential prepayment of the underlying mortgages. For this reason they are presented separately in the maturity table below. December 31, 2019 (in thousands) Amortized Cost Fair Value Available for sale: Due in one year or less $ 4,499 $ 4,520 Due after one year through five years 38,029 38,729 Due after five years through 10 years 76,584 77,943 Over 10 years 22,623 23,220 Subtotal 141,735 144,412 Collateralized mortgage obligations 16,400 16,397 Mortgage-backed Securities 179,546 179,625 Total available for sale securities $ 337,681 $ 340,434 Held to maturity: Due in one year or less $ 5,050 $ 5,047 Due after one year through five years 7,327 7,318 Due after five years through 10 years 7,496 7,543 Over 10 years 3,409 3,524 Subtotal 23,282 23,432 Mortgage-backed Securities 63,297 63,385 Total held to maturity securities $ 86,579 $ 86,817 The following is a summary of the fair value of securities with gross unrealized losses and an aging of those gross unrealized losses at December 31, 2019 . December 31, 2019 Less Than 12 Months 12 Months or More Total (in thousands) Number of Securities Fair Value Gross Unrealized Losses Number of Securities Fair Value Gross Unrealized Losses Number of Securities Fair Value Gross Unrealized Losses Available for sale: U.S. Treasuries — $ — $ — — $ — $ — — $ — $ — U.S. Government Agencies 1 4,398 (1 ) 1 149 (1 ) 2 4,547 (2 ) Corporate debt securities 42 21,269 (174 ) 12 3,184 (128 ) 54 24,453 (302 ) Other securities — — — — — — — — — Municipal bonds 9 4,285 (14 ) — — — 9 4,285 (14 ) Collateralized mortgage obligations 12 10,022 (43 ) — — — 12 10,022 (43 ) Mortgage-backed securities 57 91,753 (186 ) 9 12,121 (52 ) 66 103,874 (238 ) Total available for sale securities 121 $ 131,727 $ (418 ) 22 $ 15,454 $ (181 ) 143 $ 147,181 $ (599 ) Held to maturity: U.S. Government Agencies 2 $ 2,177 $ (2 ) 8 $ 15,965 $ (30 ) 10 $ 18,142 $ (32 ) Municipal bonds — — — 1 50 — 1 50 — Mortgage-backed securities 7 8,880 (58 ) 10 11,343 (54 ) 17 20,223 (112 ) Total held to maturity securities 9 $ 11,057 $ (60 ) 19 $ 27,358 $ (84 ) 28 $ 38,415 $ (144 ) The following is a summary of the fair value of securities with gross unrealized losses and an aging of those gross unrealized losses at December 31, 2018 . December 31, 2018 Less Than 12 Months 12 Months or More Total (in thousands) Number of Securities Fair Value Gross Unrealized Losses Number of Securities Fair Value Gross Unrealized Losses Number of Securities Fair Value Gross Unrealized Losses Available for sale: U.S. Treasuries — $ — $ — — $ — $ — — $ — $ — U.S. Government Agencies 1 4,227 (273 ) 50 137,162 (5,249 ) 51 141,389 (5,522 ) Corporate debt securities 37 9,560 (252 ) 183 58,877 (3,252 ) 220 68,437 (3,504 ) Other securities — — — — — — — — — Municipal bonds 1 115 — 19 8,436 (175 ) 20 8,551 (175 ) Collateralized mortgage obligations — — — 5 904 (14 ) 5 904 (14 ) Mortgage-backed securities 16 19,453 (73 ) 38 27,969 (939 ) 54 47,422 (1,012 ) Total available for sale securities 55 $ 33,355 $ (598 ) 295 $ 233,348 $ (9,629 ) 350 $ 266,703 $ (10,227 ) Held to maturity: U.S. Government Agencies — $ — $ — 14 $ 27,091 $ (1,081 ) 14 $ 27,091 $ (1,081 ) Municipal bonds — — — 9 5,126 (101 ) 9 5,126 (101 ) Mortgage-backed securities — — — 56 72,623 (2,304 ) 56 72,623 (2,304 ) Total held to maturity securities — $ — $ — 79 $ 104,840 $ (3,486 ) 79 $ 104,840 $ (3,486 ) As of December 31, 2019 , 171 of First Guaranty's debt securities had unrealized losses totaling 0.4% of the individual securities' amortized cost basis and 0.2% of First Guaranty's total amortized cost basis of the investment securities portfolio. 41 of the 171 securities had been in a continuous loss position for over 12 months at such date. The 41 securities had an aggregate amortized cost basis of $43.1 million and an unrealized loss of $0.3 million at December 31, 2019 . Management has the intent and ability to hold these debt securities until maturity or until anticipated recovery. Securities are evaluated for other-than-temporary impairment at least quarterly and more frequently when economic or market conditions warrant such evaluation. Consideration is given to (i) the length of time and the extent to which the fair value has been less than cost, (ii) the financial condition and near-term prospects of the issuer, (iii) the recovery of contractual principal and interest and (iv) the intent and ability of First Guaranty to retain its investment in the issuer for a period of time sufficient to allow for any anticipated recovery in fair value. Investment securities issued by the U.S. Government and Government sponsored enterprises with unrealized losses and the amount of unrealized losses on those investment securities that are the result of changes in market interest rates will not be other-than-temporarily impaired. First Guaranty has the ability and intent to hold these securities until recovery, which may not be until maturity. Corporate debt securities in a loss position consist primarily of corporate bonds issued by businesses in the financial, insurance, utility, manufacturing, industrial, consumer products and oil and gas industries. No securities with an other-than-temporary impairment loss were held at December 31, 2019 . First Guaranty believes that the remaining issuers will be able to fulfill the obligations of these securities based on evaluations described above. First Guaranty has the ability and intent to hold these securities until they recover, which could be at their maturity dates. There were no other-than-temporary impairment losses recognized on securities during the years ended December 31, 2019 , 2018 , and 2017 . The following table presents a roll-forward of the amount of credit losses on debt securities held by First Guaranty for which a portion of OTTI was recognized in other comprehensive income for the year ended December 31, 2019 , 2018 , and 2017 : (in thousands) Year Ended December 31, 2019 Year Ended December 31, 2018 Year Ended December 31, 2017 Beginning balance of credit losses at beginning of year $ 60 $ 60 $ 60 Other-than-temporary impairment credit losses on securities not previously OTTI — — — Increases for additional credit losses on securities previously determined to be OTTI — — — Reduction for increases in cash flows — — — Reduction due to credit impaired securities sold or fully settled (60 ) — — Ending balance of cumulative credit losses recognized in earnings at end of year $ — $ 60 $ 60 In 2019 , 2018 and 2017 there were no other-than-temporary impairment credit losses on securities for which First Guaranty had previously recognized OTTI. For securities that have indications of credit related impairment, management analyzes future expected cash flows to determine if any credit related impairment is evident. Estimated cash flows are determined using management's best estimate of future cash flows based on specific assumptions. The assumptions used to determine the cash flows were based on estimates of loss severity and credit default probabilities. Management reviews reports from credit rating agencies and public filings of issuers. At December 31, 2019 and 2018 the carrying value of pledged securities totaled $212.8 million and $289.7 million , respectively. Gross realized gains on sales of securities were $0.8 million , $0.1 million and $1.4 million for the years ended December 31, 2019 , 2018 and 2017 , respectively. Gross realized losses were $1.1 million , $1.9 million and $100,000 for the years ended December 31, 2019 , 2018 and 2017 . The tax applicable to these transactions amounted to $(79,000) , $(0.4) million , and $0.5 million for 2019 , 2018 and 2017 , respectively. Proceeds from sales of securities classified as available for sale amounted to $90.5 million , $114.5 million and $148.0 million for the years ended December 31, 2019 , 2018 and 2017 , respectively. Net unrealized gains on available for sale securities included in accumulated other comprehensive income (loss) ("AOCI"), net of applicable income taxes, totaled $2.2 million at December 31, 2019 . At December 31, 2018 net unrealized losses included in AOCI, net of applicable income taxes, totaled $7.1 million . During 2019 and 2018 net losses, net of tax, reclassified out of AOCI into earnings totaled $0.3 million and $1.4 million , respectively. At December 31, 2019 , First Guaranty's exposure to investment securities issuers that exceeded 10% of shareholders' equity was as follows: December 31, 2019 (in thousands) Amortized Cost Fair Value Federal Home Loan Mortgage Corporation (Freddie Mac-FHLMC) 96,966 97,036 Federal National Mortgage Association (Fannie Mae-FNMA) 146,702 146,758 Federal Farm Credit Bank (FFCB) 18,227 18,211 Total $ 261,895 $ 262,005

Loans

Loans	12 Months Ended
	Dec. 31, 2019
Receivables [Abstract]
Loans	Loans The following table summarizes the components of First Guaranty's loan portfolio as of December 31, 2019 and December 31, 2018 : December 31, 2019 December 31, 2018 (in thousands except for %) Balance As % of Category Balance As % of Category Real Estate: Construction & land development $ 172,247 11.3 % $ 124,644 10.1 % Farmland 22,741 1.5 % 18,401 1.5 % 1- 4 Family 289,635 18.9 % 172,760 14.1 % Multifamily 23,973 1.6 % 42,918 3.5 % Non-farm non-residential 616,536 40.3 % 586,263 47.7 % Total Real Estate 1,125,132 73.6 % 944,986 76.9 % Non-Real Estate: Agricultural 26,710 1.8 % 23,108 1.9 % Commercial and industrial 268,256 17.5 % 200,877 16.4 % Consumer and other 108,868 7.1 % 59,443 4.8 % Total Non-Real Estate 403,834 26.4 % 283,428 23.1 % Total Loans Before Unearned Income 1,528,966 100.0 % 1,228,414 100.0 % Unearned income (3,476 ) (3,146 ) Total Loans Net of Unearned Income $ 1,525,490 $ 1,225,268 The following table summarizes fixed and floating rate loans by contractual maturity, excluding nonaccrual loans, as of December 31, 2019 and December 31, 2018 unadjusted for scheduled principal payments, prepayments, or repricing opportunities. The average life of the loan portfolio may be substantially less than the contractual terms when these adjustments are considered. December 31, 2019 December 31, 2018 (in thousands) Fixed Floating Total Fixed Floating Total One year or less $ 205,596 $ 104,859 $ 310,455 $ 108,160 $ 80,895 $ 189,055 One to five years 509,455 286,131 795,586 393,344 287,737 681,081 Five to 15 years 147,502 65,713 213,215 118,715 86,779 205,494 Over 15 years 143,695 51,612 195,307 85,611 58,430 144,041 Subtotal $ 1,006,248 $ 508,315 1,514,563 $ 705,830 $ 513,841 1,219,671 Nonaccrual loans 14,403 8,743 Total Loans Before Unearned Income 1,528,966 1,228,414 Unearned income (3,476 ) (3,146 ) Total Loans Net of Unearned Income $ 1,525,490 $ 1,225,268 As of December 31, 2019 , $153.3 million of floating rate loans were at their interest rate floor. At December 31, 2018 , $27.7 million of floating rate loans were at their interest rate floor. Nonaccrual loans have been excluded from these totals. The following tables present the age analysis of past due loans at December 31, 2019 and December 31, 2018 : As of December 31, 2019 (in thousands) 30-89 Days Past Due 90 Days or Greater Past Due Total Past Due Current Total Loans Recorded Investment 90 Days Accruing Real Estate: Construction & land development $ 760 $ 429 $ 1,189 $ 171,058 $ 172,247 $ 48 Farmland 6 1,274 1,280 21,461 22,741 — 1- 4 family 8,521 3,682 12,203 277,432 289,635 923 Multifamily — — — 23,973 23,973 — Non-farm non-residential 11,279 6,249 17,528 599,008 616,536 1,603 Total Real Estate 20,566 11,634 32,200 1,092,932 1,125,132 2,574 Non-Real Estate: Agricultural 310 4,800 5,110 21,600 26,710 — Commercial and industrial 2,801 342 3,143 265,113 268,256 15 Consumer and other 794 266 1,060 107,808 108,868 50 Total Non-Real Estate 3,905 5,408 9,313 394,521 403,834 65 Total Loans Before Unearned Income $ 24,471 $ 17,042 $ 41,513 $ 1,487,453 1,528,966 $ 2,639 Unearned income (3,476 ) Total Loans Net of Unearned Income $ 1,525,490 As of December 31, 2018 (in thousands) 30-89 Days Past Due 90 Days or Greater Past Due Total Past Due Current Total Loans Recorded Investment 90 Days Accruing Real Estate: Construction & land development $ 936 $ 311 $ 1,247 $ 123,397 $ 124,644 $ — Farmland — 1,293 1,293 17,108 18,401 — 1- 4 family 4,333 2,272 6,605 166,155 172,760 26 Multifamily 648 — 648 42,270 42,918 — Non-farm non-residential 4,897 864 5,761 580,502 586,263 — Total Real Estate 10,814 4,740 15,554 929,432 944,986 26 Non-Real Estate: Agricultural 528 3,651 4,179 18,929 23,108 — Commercial and industrial 742 370 1,112 199,765 200,877 53 Consumer and other 537 127 664 58,779 59,443 66 Total Non-Real Estate 1,807 4,148 5,955 277,473 283,428 119 Total Loans Before Unearned Income $ 12,621 $ 8,888 $ 21,509 $ 1,206,905 1,228,414 $ 145 Unearned income (3,146 ) Total Loans Net of Unearned Income $ 1,225,268 The tables above include $14.4 million and $8.7 million of nonaccrual loans for December 31, 2019 and 2018 , respectively. See the tables below for more detail on nonaccrual loans. The following is a summary of nonaccrual loans by class at the dates indicated: As of December 31, (in thousands) 2019 2018 Real Estate: Construction & land development $ 381 $ 311 Farmland 1,274 1,293 1- 4 family 2,759 2,246 Multifamily — — Non-farm non-residential 4,646 864 Total Real Estate 9,060 4,714 Non-Real Estate: Agricultural 4,800 3,651 Commercial and industrial 327 317 Consumer and other 216 61 Total Non-Real Estate 5,343 4,029 Total Nonaccrual Loans $ 14,403 $ 8,743 The following table identifies the credit exposure of the loan portfolio, including loans acquired with deteriorated credit quality, by specific credit ratings as of the dates indicated: As of December 31, 2019 As of December 31, 2018 (in thousands) Pass Special Mention Substandard Doubtful Total Pass Special Mention Substandard Doubtful Total Real Estate: Construction & land development $ 163,808 $ 6,180 $ 2,259 $ — $ 172,247 $ 116,062 $ 5,698 $ 2,884 $ — $ 124,644 Farmland 18,223 3,177 1,341 — 22,741 13,151 3,888 1,362 — 18,401 1- 4 family 271,392 4,751 13,492 — 289,635 160,581 2,815 9,364 — 172,760 Multifamily 16,025 805 7,143 — 23,973 35,554 — 7,364 — 42,918 Non-farm non-residential 589,800 7,743 18,993 — 616,536 564,993 2,888 17,859 523 586,263 Total Real Estate 1,059,248 22,656 43,228 — 1,125,132 890,341 15,289 38,833 523 944,986 Non-Real Estate: Agricultural 21,529 48 5,133 — 26,710 19,050 43 4,015 — 23,108 Commercial and industrial 262,416 1,199 4,641 — 268,256 186,176 10,930 3,771 — 200,877 Consumer and other 108,618 180 70 — 108,868 59,119 151 173 — 59,443 Total Non-Real Estate 392,563 1,427 9,844 — 403,834 264,345 11,124 7,959 — 283,428 Total Loans Before Unearned Income $ 1,451,811 $ 24,083 $ 53,072 $ — 1,528,966 $ 1,154,686 $ 26,413 $ 46,792 $ 523 1,228,414 Unearned income (3,476 ) (3,146 ) Total Loans Net of Unearned Income $ 1,525,490 $ 1,225,268 Purchased Impaired Loans As part of the acquisition of Union Bancshares, Inc. on November 7, 2019 and Premier Bancshares, Inc. on June 16, 2017, First Guaranty purchased credit impaired loans for which there was, at acquisition, evidence of deterioration of credit quality since their origination and it was probable, at acquisition, that all contractually required payments would not be collected. The carrying amount of those loans is as follows at December 31, 2019 and 2018 . (in thousands) As of December 31, 2019 As of December 31, 2018 Real Estate: Construction & land development $ 526 $ — Farmland — 1 1- 4 family 6,402 48 Multifamily — — Non-farm non-residential 2,294 2,301 Total Real Estate 9,222 2,350 Non-Real Estate: Agricultural — — Commercial and industrial 1,198 909 Consumer and other — — Total Non-Real Estate 1,198 909 Total $ 10,420 $ 3,259 For those purchased loans disclosed above, there was no allowance for loan losses at December 31, 2019 or December 31, 2018 . Where First Guaranty can reasonably estimate the cash flows expected to be collected on the loans, a portion of the purchase discount is allocated to an accretable yield adjustment based upon the present value of the future estimated cash flows versus the current carrying value of the loan and the accretable yield portion is being recognized as interest income over the remaining life of the loan. Where First Guaranty cannot reasonably estimate the cash flows expected to be collected on the loans, it has decided to account for those loans using the cost recovery method of income recognition. As such, no portion of a purchase discount adjustment has been determined to meet the definition of an accretable yield adjustment on those loans accounted for using the cost recovery method. If, in the future, cash flows from the borrower(s) can be reasonably estimated, a portion of the purchase discount would be allocated to an accretable yield adjustment based upon the present value of the future estimated cash flows versus the current carrying value of the loan and the accretable yield portion would be recognized as interest income over the remaining life of the loan. Until such accretable yield can be calculated, under the cost recovery method of income recognition, all payments will be used to reduce the carrying value of the loan and no income will be recognized on the loan until the carrying value is reduced to zero. The accretable yield, or income expected to be collected, on the purchased loans above is as follows for the years ended December 31, 2019 and 2018 . (in thousands) Year Ended December 31, 2019 Year Ended December 31, 2018 Balance, beginning of period $ 613 $ 1,031 Acquisition accretable yield 3,367 — Accretion (831 ) (418 ) Net transfers from nonaccretable difference to accretable yield 498 — Balance, end of period $ 3,647 $ 613 The contractually required payments of purchased impaired loans related to the Union acquisition totaled $13.7 million , while the cash flow expected to be collected at acquisition total $10.6 million , and the fair value of the acquired loans totaled $7.3 million .

Allowance for Loan Losses

Allowance for Loan Losses	12 Months Ended
	Dec. 31, 2019
Allowance for Credit Loss [Abstract]
Allowance for Loan Losses	Allowance for Loan Losses A summary of changes in the allowance for loan losses, by loan type, for the years ended December 31, 2019 , 2018 and 2017 are as follows: As of December 31, 2019 2018 (in thousands) Beginning Allowance (12/31/18) Charge-offs Recoveries Provision Ending Allowance (12/31/19) Beginning Allowance (12/31/17) Charge-offs Recoveries Provision Ending Allowance (12/31/18) Real Estate: Construction & land development $ 581 $ — $ — $ (158 ) $ 423 $ 628 $ — $ 3 $ (50 ) $ 581 Farmland 41 — — 9 50 5 — — 36 41 1- 4 family 911 (552 ) 39 629 1,027 1,078 (99 ) 90 (158 ) 911 Multifamily 1,318 — — (280 ) 1,038 994 — 20 304 1,318 Non-farm non-residential 4,771 (2,603 ) 5 3,104 5,277 2,811 (404 ) 89 2,275 4,771 Total Real Estate 7,622 (3,155 ) 44 3,304 7,815 5,516 (503 ) 202 2,407 7,622 Non-Real Estate: Agricultural 339 (40 ) — (204 ) 95 187 (300 ) 26 426 339 Commercial and industrial 1,909 (879 ) 267 612 1,909 2,377 (179 ) 1,642 (1,931 ) 1,909 Consumer and other 891 (1,190 ) 246 1,163 1,110 1,125 (907 ) 216 457 891 Unallocated 15 — — (15 ) — 20 — — (5 ) 15 Total Non-Real Estate 3,154 (2,109 ) 513 1,556 3,114 3,709 (1,386 ) 1,884 (1,053 ) 3,154 Total $ 10,776 $ (5,264 ) $ 557 $ 4,860 $ 10,929 $ 9,225 $ (1,889 ) $ 2,086 $ 1,354 $ 10,776 As of December 31, 2017 (in thousands) Beginning Allowance (12/31/16) Charge-offs Recoveries Provision Ending Allowance (12/31/17) Real Estate: Construction & land development $ 1,232 $ — $ 43 $ (647 ) $ 628 Farmland 19 — — (14 ) 5 1- 4 family 1,204 (33 ) 92 (185 ) 1,078 Multifamily 591 — 40 363 994 Non-farm non-residential 3,451 (1,291 ) 85 566 2,811 Total Real Estate 6,497 (1,324 ) 260 83 5,516 Non-Real Estate: Agricultural 74 (162 ) 138 137 187 Commercial and industrial 3,543 (3,629 ) 30 2,433 2,377 Consumer and other 972 (1,247 ) 223 1,177 1,125 Unallocated 28 — — (8 ) 20 Total Non-Real Estate 4,617 (5,038 ) 391 3,739 3,709 Total $ 11,114 $ (6,362 ) $ 651 $ 3,822 $ 9,225 Negative provisions are caused by changes in the composition and credit quality of the loan portfolio. The result is an allocation of the loan loss reserve from one category to another. A summary of the allowance and loans, including loans acquired with deteriorated credit quality, individually and collectively evaluated for impairment are as follows: As of December 31, 2019 (in thousands) Allowance Individually Evaluated for Impairment Allowance Individually Evaluated for Purchased Credit-Impairment Allowance Collectively Evaluated for Impairment Total Allowance for Credit Losses Loans Individually Evaluated for Impairment Loans Individually Evaluated for Purchased Credit-Impairment Loans Collectively Evaluated for Impairment Total Loans before Unearned Income Real Estate: Construction & land development $ — $ — $ 423 $ 423 $ — $ 526 $ 171,721 $ 172,247 Farmland — — 50 50 543 — 22,198 22,741 1- 4 family 34 — 993 1,027 1,058 6,402 282,175 289,635 Multifamily — — 1,038 1,038 — — 23,973 23,973 Non-farm non-residential 1,879 — 3,398 5,277 12,120 2,294 602,122 616,536 Total Real Estate 1,913 — 5,902 7,815 13,721 9,222 1,102,189 1,125,132 Non-Real Estate: Agricultural — — 95 95 4,030 — 22,680 26,710 Commercial and industrial 111 — 1,798 1,909 2,981 1,198 264,077 268,256 Consumer and other — — 1,110 1,110 — — 108,868 108,868 Unallocated — — — — — — — — Total Non-Real Estate 111 — 3,003 3,114 7,011 1,198 395,625 403,834 Total $ 2,024 $ — $ 8,905 $ 10,929 $ 20,732 $ 10,420 $ 1,497,814 $ 1,528,966 Unearned Income (3,476 ) Total Loans Net of Unearned Income $ 1,525,490 As of December 31, 2018 (in thousands) Allowance Individually Evaluated for Impairment Allowance Individually Evaluated for Purchased Credit-Impairment Allowance Collectively Evaluated for Impairment Total Allowance for Credit Losses Loans Individually Evaluated for Impairment Loans Individually Evaluated for Purchased Credit-Impairment Loans Collectively Evaluated for Impairment Total Loans before Unearned Income Real Estate: Construction & land development $ 38 $ — $ 543 $ 581 $ 304 $ — $ 124,340 $ 124,644 Farmland — — 41 41 552 1 17,848 18,401 1- 4 family — — 911 911 631 48 172,081 172,760 Multifamily — — 1,318 1,318 — — 42,918 42,918 Non-farm non-residential 1,152 — 3,619 4,771 4,881 2,301 579,081 586,263 Total Real Estate 1,190 — 6,432 7,622 6,368 2,350 936,268 944,986 Non-Real Estate: Agricultural — — 339 339 2,983 — 20,125 23,108 Commercial and industrial 110 — 1,799 1,909 1,088 909 198,880 200,877 Consumer and other — — 891 891 — — 59,443 59,443 Unallocated — — 15 15 — — — — Total Non-Real Estate 110 — 3,044 3,154 4,071 909 278,448 283,428 Total $ 1,300 $ — $ 9,476 $ 10,776 $ 10,439 $ 3,259 $ 1,214,716 $ 1,228,414 Unearned Income (3,146 ) Total Loans Net of Unearned Income $ 1,225,268 As of December 31, 2019 , 2018 and 2017 , First Guaranty had loans totaling $14.4 million , $8.7 million and $12.6 million , respectively, not accruing interest. As of December 31, 2019 , 2018 and 2017 , First Guaranty had loans past due 90 days or more and still accruing interest totaling $2.6 million , $0.1 million and $0.8 million , respectively. The average outstanding balance of nonaccrual loans in 2019 was $12.0 million compared to $8.9 million in 2018 and $17.3 million in 2017 . As of December 31, 2019 , First Guaranty has no outstanding commitments to advance additional funds in connection with impaired loans. The following is a summary of impaired loans, excluding loans acquired with deteriorated credit quality, by class at December 31, 2019 : As of December 31, 2019 (in thousands) Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized Interest Income Cash Basis Impaired Loans with no related allowance: Real Estate: Construction & land development $ — $ — $ — $ — $ — $ — Farmland 543 552 — 550 — — 1- 4 family 541 541 — 544 27 22 Multifamily — — — — — — Non-farm non-residential 8,307 8,307 — 9,940 673 688 Total Real Estate 9,391 9,400 — 11,034 700 710 Non-Real Estate: Agricultural 4,030 4,186 — 4,031 12 — Commercial and industrial 1,962 1,962 — 1,788 81 67 Consumer and other — Total Non-Real Estate 5,992 6,148 — 5,819 93 67 Total Impaired Loans with no related allowance 15,383 15,548 — 16,853 793 777 Impaired Loans with an allowance recorded: Real estate: Construction & land development — — — — — — Farmland — — — — — — 1- 4 family 517 517 34 522 — — Multifamily — — — — — — Non-farm non-residential 3,813 4,162 1,879 4,134 194 212 Total Real Estate 4,330 4,679 1,913 4,656 194 212 Non-Real Estate: Agricultural — — — — — — Commercial and industrial 1,019 1,019 111 1,039 81 77 Consumer and other — — — — — — Total Non-Real Estate 1,019 1,019 111 1,039 81 77 Total Impaired Loans with an allowance recorded 5,349 5,698 2,024 5,695 275 289 Total Impaired Loans $ 20,732 $ 21,246 $ 2,024 $ 22,548 $ 1,068 $ 1,066 The following is a summary of impaired loans, excluding loans acquired with deteriorated credit quality, by class at December 31, 2018 : As of December 31, 2018 (in thousands) Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized Interest Income Cash Basis Impaired Loans with no related allowance: Real Estate: Construction & land development $ — $ — $ — $ — $ — $ — Farmland — — — — — — 1- 4 family 631 631 — 626 13 — Multifamily — — — — — — Non-farm non-residential 523 523 — 536 33 34 Total Real Estate 1,154 1,154 — 1,162 46 34 Non-Real Estate: Agricultural 3,535 3,613 — 3,583 173 272 Commercial and industrial — — — — — — Consumer and other — — — — — — Total Non-Real Estate 3,535 3,613 — 3,583 173 272 Total Impaired Loans with no related allowance 4,689 4,767 — 4,745 219 306 Impaired Loans with an allowance recorded: Real estate: Construction & land development — — — — — — Farmland — — — — — — 1- 4 family — — — — — — Multifamily — — — — — — Non-farm non-residential 3,070 3,070 1,150 3,104 139 139 Total Real Estate 3,070 3,070 1,150 3,104 139 139 Non-Real Estate: Agricultural — — — — — — Commercial and industrial 1,088 1,088 110 1,115 55 64 Consumer and other — — — — — — Total Non-Real Estate 1,088 1,088 110 1,115 55 64 Total Impaired Loans with an allowance recorded 4,158 4,158 1,260 4,219 194 203 Total Impaired Loans $ 8,847 $ 8,925 $ 1,260 $ 8,964 $ 413 $ 509 Troubled Debt Restructurings A Troubled Debt Restructuring ("TDR") is considered such if the lender for economic or legal reasons related to the debtor's financial difficulties grants a concession to the debtor that it would not otherwise consider. The modifications to First Guaranty's TDRs were concessions on either the interest rate charged or the amortization. The effect of the modifications to First Guaranty was a reduction in interest income. These loans have an allocated reserve in First Guaranty's allowance for loan losses. First Guaranty has not restructured any loans that are considered TDRs in the years ended December 31, 2019 and 2018 . At December 31, 2019 , First Guaranty had no outstanding TDRs. The following table is an age analysis of TDRs as of December 31, 2019 and December 31, 2018 : December 31, 2019 December 31, 2018 Accruing Loans Accruing Loans (in thousands) Current 30-89 Days Past Due Nonaccrual Total TDRs Current 30-89 Days Past Due Nonaccrual Total TDRs Real Estate: Construction & land development $ — $ — $ — $ — $ — $ — $ 304 $ 304 Farmland — — — — — — — — 1- 4 family — — — — — — — — Multifamily — — — — — — — — Non-farm non-residential — — — — 1,288 — — 1,288 Total Real Estate — — — — 1,288 — 304 1,592 Non-Real Estate: Agricultural — — — — — — — — Commercial and industrial — — — — — — — — Consumer and other — — — — — — — — Total Non-Real Estate — — — — — — — — Total $ — $ — $ — $ — $ 1,288 $ — $ 304 $ 1,592 The following table discloses TDR activity for the twelve months ended December 31, 2019 . Trouble Debt Restructured Loans Activity Twelve Months Ended December 31, 2019 (in thousands) Beginning balance (December 31, 2018) New TDRs Charge-offs post-modification Transferred to ORE Paydowns Construction to permanent financing Restructured to market terms Other adjustments Ending balance (December 31, 2019) Real Estate: Construction & land development $ 304 $ — $ — $ — $ — $ — $ (304 ) $ — $ — Farmland — — — — — — — — — 1- 4 family — — — — — — — — — Multifamily — — — — — — — — — Non-farm non-residential 1,288 — — — — — (1,288 ) — — Total Real Estate 1,592 — — — — — (1,592 ) — — Non-Real Estate: Agricultural — — — — — — — — — Commercial and industrial — — — — — — — — — Consumer and other — — — — — — — — — Total Non-Real Estate — — — — — — — — — Total Impaired Loans with no related allowance $ 1,592 $ — $ — $ — $ — $ — $ (1,592 ) $ — $ — There were no commitments to lend additional funds to debtors whose terms have been modified in a troubled debt restructuring at December 31, 2019 .

Premises and Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2019
Property, Plant and Equipment [Abstract]
Premises and Equipment	Premises and Equipment The components of premises and equipment at December 31, 2019 and 2018 are as follows: (in thousands) December 31, 2019 December 31, 2018 Land $ 15,180 $ 12,875 Bank premises 40,536 33,457 Furniture and equipment 27,255 25,453 Construction in progress 9,534 2,046 Acquired value 92,505 73,831 Less: accumulated depreciation 36,041 34,136 Net book value $ 56,464 $ 39,695 Depreciation expense amounted to $2.3 million , $2.1 million and $1.8 million for 2019 , 2018 and 2017 , respectively. Interest cost capitalized as a construction cost was $91,000 , $54,000 and $0 for 2019, 2018 and 2017.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets Goodwill and intangible assets deemed to have indefinite lives are no longer amortized, but are subject to impairment testing. Other intangible assets continue to be amortized over their useful lives. Goodwill represents the purchase price over the fair value of net assets acquired from the Homestead Bancorp in 2007, Premier Bancshares, Inc. in 2017 and Union Bancshares, Incorporated in 2019. No impairment charges have been recognized since acquisition. Goodwill totaled $12.9 million and $3.5 million at December 31, 2019 and 2018 , respectively. The following table summarizes intangible assets subject to amortization. December 31, 2019 December 31, 2018 (in thousands) Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Core deposit intangibles $ 16,266 $ 9,739 $ 6,527 $ 12,053 $ 9,349 $ 2,704 Loan servicing assets 1,558 918 640 1,441 617 824 Total $ 17,824 $ 10,657 $ 7,167 $ 13,494 $ 9,966 $ 3,528 The core deposits intangible reflect the value of deposit relationships, including the beneficial rates, which arose from acquisitions. The weighted-average amortization period remaining for the core deposit intangibles is 10.8 years . Amortization expense relating to purchase accounting intangibles totaled $0.4 million , $0.5 million , and $0.4 million for the years ended December 31, 2019 , 2018 , and 2017 , respectively. Amortization expense of the core deposit intangible assets for the next five years is as follows: For the Years Ended Estimated Amortization Expense (in thousands) December 31, 2020 $ 712 December 31, 2021 $ 644 December 31, 2022 $ 576 December 31, 2023 $ 576 December 31, 2024 $ 576

Other Real Estate

Other Real Estate	12 Months Ended
	Dec. 31, 2019
Real Estate [Abstract]
Other Real Estate	Other Real Estate Other real estate owned consists of the following at the dates indicated: (in thousands) December 31, 2019 December 31, 2018 Real Estate Owned Acquired by Foreclosure: Residential $ 559 $ 120 Construction & land development 669 241 Non-farm non-residential 3,651 777 Total Other Real Estate Owned and Foreclosed Property $ 4,879 $ 1,138

Deposits

Deposits	12 Months Ended
	Dec. 31, 2019
Deposits [Abstract]
Deposits	Deposits A schedule of maturities of all time deposits are as follows: (in thousands) December 31, 2019 2020 $ 344,758 2021 90,279 2022 77,623 2023 101,672 2024 and thereafter 141,695 Total $ 756,027 The table above includes $3.4 million in brokered deposits for December 31, 2019 . The aggregate amount of jumbo time deposits, each with a minimum denomination of $250,000 totaled $290.3 million and $301.8 million at December 31, 2019 and 2018 , respectively.

Borrowings

Borrowings	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Borrowings	Borrowings Short-term borrowings are summarized as follows: (in thousands) December 31, 2019 December 31, 2018 Federal Home Loan Bank advances $ 13,079 $ — Repurchase agreements 6,840 Line of credit — — Total short-term borrowings $ 19,919 $ — First Guaranty maintains borrowing relationships with other financial institutions as well as the Federal Home Loan Bank on a short and long-term basis to meet liquidity needs. First Guaranty had $19.9 million in short-term borrowings outstanding at December 31, 2019 compared to none outstanding at December 31, 2018 . First Guaranty has an available line of credit of $6.5 million , with no outstanding balance at December 31, 2019 . Available lines of credit totaled $278.8 million at December 31, 2019 and $216.4 million at December 31, 2018 . The following schedule provides certain information about First Guaranty's short-term borrowings for the periods indicated: December 31, (in thousands except for %) 2019 2018 2017 Outstanding at year end $ 19,919 $ — $ 15,500 Maximum month-end outstanding $ 19,919 $ 37,000 $ 28,000 Average daily outstanding $ 3,320 $ 7,119 $ 5,833 Weighted average rate during the year 2.00 % 2.21 % 1.06 % Weighted average rate at year end 2.00 % — % 1.51 % Long-term debt is summarized as follows: Long-term Federal Home Loan Bank advance, fixed at 2.12% , totaled $3.5 million at December 31, 2019 and $0 at December 31, 2018 . This advance was acquired in the Union acquisition and has a contractual maturity date of September 1, 2037 . Senior long-term debt with a commercial bank, priced at floating 3-month LIBOR plus 250 basis points (4.61%) , totaled $16.9 million at December 31, 2019 and $19.8 million at December 31, 2018 . First Guaranty pays $735,294 principal plus interest quarterly . This loan was originated in December 2015 and has a contractual maturity date of December 22, 2020 . This long-term debt is secured by a pledge of 85% ( 4,823,899 shares) of First Guaranty's interest in First Guaranty Bank (a wholly owned subsidiary). Senior long-term debt with a commercial bank, priced at floating Wall Street Journal Prime less 70 basis points (4.05%) , totaled $31.7 million at December 31, 2019 and $0 at December 31, 2018 . First Guaranty pays $812,500 principal plus interest quarterly . This loan was originated in November 2019 and has a contractual maturity date of November 7, 2024 . This long-term debt is secured by a pledge of 85% ( 4,823,899 shares) of First Guaranty's interest in First Guaranty Bank (a wholly owned subsidiary). Junior subordinated debt, priced at Wall Street Journal Prime plus 75 basis points (4.00%) , totaled $14.7 million at December 31, 2019 and December 31, 2018 . First Guaranty pays interest semi-annually for the Fixed Interest Rate Period and quarterly for the Floating Interest Rate Period. The Note is unsecured and ranks junior in right of payment to any senior indebtedness and obligations to general and secured creditors. The Note was originated in December 2015 and is scheduled to mature on December 21, 2025 . Subject to limited exceptions, First Guaranty cannot repay the Note until after December 21, 2020. The Note qualifies for treatment as Tier 2 capital for regulatory capital purposes. First Guaranty maintains a revolving line of credit for $6.5 million with an availability of $6.5 million at December 31, 2019 . This line of credit is secured by a pledge of 13.2% ( 735,745 shares) of First Guaranty's interest in First Guaranty Bank (a wholly owned subsidiary) and is priced at 5.00% . At December 31, 2019 , letters of credit issued by the FHLB totaling $355.2 million were outstanding and carried as off-balance sheet items, all of which expire by 2024. At December 31, 2018 , letters of credit issued by the FHLB totaling $344.3 million were outstanding and carried as off-balance sheet items, all of which expired in 2019 . The letters of credit are solely used for pledging towards public fund deposits. The FHLB has a blanket lien on substantially all of the loans in First Guaranty's portfolio which is used to secure borrowing availability from the FHLB. First Guaranty has obtained a subordination agreement from the FHLB on First Guaranty's farmland, agricultural, and commercial and industrial loans. These loans are available to be pledged for additional reserve liquidity. As of December 31, 2019 obligations on senior long-term debt and junior subordinated debentures totaled $63.3 million . The scheduled maturities are as follows: (in thousands) Senior Long-term Debt Junior Subordinated Debentures 2020 $ 19,349 $ — 2021 3,250 — 2022 3,250 — 2023 3,250 — 2024 19,500 — 2024 and thereafter — 15,000 Subtotal $ 48,599 $ 15,000 Debt issuance costs (41 ) (263 ) Total $ 48,558 $ 14,737

Capital Requirements

Capital Requirements	12 Months Ended
	Dec. 31, 2019
Banking and Thrift [Abstract]
Capital Requirements	Capital Requirements First Guaranty Bank is subject to various regulatory capital requirements administered by federal and state banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions that, if undertaken, could have a direct material effect on First Guaranty's financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Bank must meet specific capital guidelines that involve quantitative measures of their 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 of total and Tier 1 capital to risk-weighted assets and of Tier 1 capital to average assets. Management believes, as of December 31, 2019 and 2018 , that the Bank met all capital adequacy requirements. In addition to establishing the minimum regulatory capital requirements, the regulations limit capital distributions and certain discretionary bonus payments to management if the institution does not hold a "capital conservation buffer" consisting of 2.5% of common equity Tier 1 capital to risk-weighted asset above the amount necessary to meet its minimum risk-based capital requirements. The capital conservation buffer requirement was phased in beginning January 1, 2016 at 0.625% of risk-weighted assets and increasing each year until fully implemented at 2.5% on January 1, 2019. For 2019, the capital conservation buffer was 2.500% of risk-weighted assets. First Guaranty Bank's capital conservation buffer was 4.58% at December 31, 2019 . As of December 31, 2019 , the most recent notification from the Federal Deposit Insurance Corporation categorized the Bank as well capitalized under the regulatory framework for prompt corrective action. To be categorized as well capitalized, an institution must maintain minimum total risk-based, Tier 1 risk-based and Tier 1 leverage ratios as set forth in the following table. There are no conditions or events since the notification that Management believes have changed the Bank's category. First Guaranty Bank's actual capital amounts and ratios as of December 31, 2019 and 2018 are presented in the following table. Actual Minimum Capital Requirements Minimum to be Well Capitalized Under Action Provisions (in thousands except for %) Amount Ratio Amount Ratio Amount Ratio December 31, 2019 Total Risk-based Capital: $ 213,962 12.61 % $ 135,697 8.00 % $ 169,621 10.00 % Tier 1 Capital: $ 203,034 11.96 % $ 101,773 6.00 % $ 135,697 8.00 % Tier 1 Leverage Capital: $ 203,033 10.44 % $ 77,771 4.00 % $ 97,214 5.00 % Common Equity Tier One Capital: $ 203,034 11.96 % $ 76,329 4.50 % $ 110,254 6.50 % December 31, 2018 Total Risk-based Capital: $ 181,618 12.97 % $ 112,055 8.00 % $ 140,069 10.00 % Tier 1 Capital: $ 170,842 12.20 % $ 84,041 6.00 % $ 112,055 8.00 % Tier 1 Leverage Capital: $ 170,842 9.79 % $ 69,822 4.00 % $ 87,277 5.00 % Common Equity Tier One Capital: $ 170,842 12.20 % $ 63,031 4.50 % $ 91,045 6.50 %

Dividend Restrictions

Dividend Restrictions	12 Months Ended
	Dec. 31, 2019
Dividend Restrictions [Abstract]
Dividend Restrictions	Dividend Restrictions The Federal Reserve Bank ("FRB") has stated that, generally, a bank holding company should not maintain a rate of distributions to shareholders unless its available net income has been sufficient to fully fund the distributions, and the prospective rate of earnings retention appears consistent with the bank holding company's capital needs, asset quality and overall financial condition. As a Louisiana corporation, First Guaranty is restricted under the Louisiana corporate law from paying dividends under certain conditions. First Guaranty Bank may not pay dividends or distribute capital assets if it is in default on any assessment due to the FDIC. First Guaranty Bank is also subject to regulations that impose minimum regulatory capital and minimum state law earnings requirements that affect the amount of cash available for distribution. In addition, under the Louisiana Banking Law, dividends may not be paid if it would reduce the unimpaired surplus below 50% of outstanding capital stock in any year. The Bank is restricted under applicable laws in the payment of dividends to an amount equal to current year earnings plus undistributed earnings for the immediately preceding year, unless prior permission is received from the Commissioner of Financial Institutions for the State of Louisiana. Dividends payable by the Bank in 2020 without permission will be limited to 2020 earnings plus the undistributed earnings of $2.1 million from 2019 . Accordingly, at January 1, 2020 , $222.6 million of First Guaranty's equity in the net assets of the Bank was restricted. In addition, dividends paid by the Bank to First Guaranty would be prohibited if the effect thereof would cause the Bank's capital to be reduced below applicable minimum capital requirements.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2019
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions In the normal course of business, First Guaranty and its subsidiary, First Guaranty Bank, have loans, deposits and other transactions with its executive officers, directors, affiliates and certain business organizations and individuals with which such persons are associated. These transactions are completed with terms no less favorable than current market rates. An analysis of the activity of loans made to such borrowers during the year ended December 31, 2019 and 2018 follows: December 31, (in thousands) 2019 2018 Balance, beginning of year $ 63,907 $ 82,918 Net (Decrease) Increase (2,087 ) (19,011 ) Balance, end of year $ 61,820 $ 63,907 Unfunded commitments to First Guaranty and Bank directors and executive officers totaled $21.6 million and $8.6 million at December 31, 2019 and 2018 , respectively. At December 31, 2019 First Guaranty and the Bank had deposits from directors and executives totaling $41.5 million . There were no participations in loans purchased from affiliated financial institutions included in First Guaranty's loan portfolio in 2019 or 2018 . During the years ended 2019 , 2018 and 2017 , First Guaranty paid approximately $0.5 million , $0.3 million and $0.4 million , respectively, for printing services and supplies and office furniture and equipment to Champion Industries, Inc., of which Mr. Marshall T. Reynolds, the Chairman of First Guaranty's Board of Directors, is President, Chief Executive Officer, Chairman of the Board of Directors and a major shareholder of Champion. On December 21, 2015, First Guaranty issued a $15.0 million subordinated note (the "Note") to Edgar Ray Smith III, a director of First Guaranty. The Note is for a ten -year term (non-callable for first five years) and will bear interest at a fixed annual rate of 4.0% for the first five years of the term and then adjust to a floating rate based on the Prime Rate as reported by the Wall Street Journal plus 75 basis points for the period of time after the fifth year until redemption or maturity. First Guaranty paid interest of $0.6 million in 2019 and 2018 for this note. During the years ended 2019 , 2018 and 2017 , First Guaranty paid approximately $0.1 million , $0.2 million and $6,000 , respectively, for the purchase and maintenance of First Guaranty's automobiles to subsidiaries of Hood Automotive Group, of which William K. Hood, a director of First Guaranty, is President. During the years ended 2019 , 2018 and 2017 , First Guaranty paid approximately $69,000 , $0.7 million and $0.2 million , respectively, for architectural services in relation to bank branches to Gasaway Gasaway Bankston Architects, of which bank subsidiary board member Andrew B. Gasaway is part owner. During the years ended 2019 and 2018 , First Guaranty paid approximately $0.3 million and $0.2 million to Centurion Insurance, an insurance brokerage agency, to bind coverage at market terms for property casualty insurance and health insurance. First Guaranty owns a 40% interest in Centurion and accounts for this investment under the equity method.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2019
Share-based Payment Arrangement [Abstract]
Employee Benefit Plans	Employee Benefit Plans First Guaranty has an employee savings plan to which employees, who meet certain service requirements, may defer 1% to 20% of their base salaries, 6% of which may be matched up to 100% , at its sole discretion. Contributions to the savings plan were $149,000 , $292,000 and $240,000 in 2019 , 2018 and 2017 , respectively. First Guaranty has an Employee Stock Ownership Plan ("ESOP") which was frozen in 2010. No contributions were made to the ESOP for the years 2019 , 2018 or 2017 . As of December 31, 2019 , the ESOP held 5,644 shares. First Guaranty is in the process of terminating the plan.

Other Expenses

Other Expenses	12 Months Ended
	Dec. 31, 2019
Other Expenses [Abstract]
Other Expenses	Other Expenses The following is a summary of the significant components of other noninterest expense: December 31, (in thousands) 2019 2018 2017 Other noninterest expense: Legal and professional fees $ 2,648 $ 2,362 $ 3,049 Data processing 1,972 1,692 1,608 ATM Fees 1,217 1,214 1,161 Marketing and public relations 1,456 1,329 1,205 Taxes - sales, capital and franchise 1,094 1,066 970 Operating supplies 674 562 496 Software expense and amortization 1,308 1,119 923 Travel and lodging 908 978 910 Telephone 193 208 167 Amortization of core deposits 390 545 432 Donations 603 380 322 Net costs from other real estate and repossessions 422 186 306 Regulatory assessment 683 941 726 Other 2,536 2,204 1,628 Total other noninterest expense $ 16,104 $ 14,786 $ 13,903 First Guaranty does not capitalize advertising costs. They are expensed as incurred and are included in other noninterest expense on the Consolidated Statements of Income. Advertising expense was $0.8 million , $0.9 million and $0.7 million for 2019 , 2018 and 2017 , respectively.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Tax Cuts and Jobs Act ("TCJA") signed into law on December 22, 2017, makes broad and complex changes to the U.S. tax code that affected income tax expense in 2017. The TCJA reduced the U.S. federal corporate income tax rate from 35% to 21% beginning January 1, 2018 and also established new tax laws that affect 2018. The following is a summary of the provision for income taxes included in the Consolidated Statements of Income: December 31, (in thousands) 2019 2018 2017 Current $ 3,770 $ 3,929 $ 4,638 Deferred (114 ) (467 ) 2,761 Total $ 3,656 $ 3,462 $ 7,399 The difference between income taxes computed by applying the statutory federal income tax rate and the provision for income taxes in the financial statements is reconciled as follows: December 31, (in thousands except for %) 2019 2018 2017 Statutory tax rate 21.0 % 21.0 % 35.0 % Federal income taxes at statutory rate $ 3,758 $ 3,712 $ 6,703 Tax exempt municipal income (140 ) (166 ) (254 ) Other (1) 38 (84 ) 950 Total $ 3,656 $ 3,462 $ 7,399 (1) Included in other for the year ended December 31, 2017 is $0.9 million related to the estimated net impact from the remeasurement of deferred tax assets and liabilities as a result of the passage of the Tax Cuts and Jobs Act in December 2017. Deferred taxes are recorded based upon differences between the financial statement and tax basis of assets and liabilities, and available tax credit carry forwards. Temporary differences between the financial statement and tax values of assets and liabilities give rise to deferred taxes. The significant components of deferred taxes classified in First Guaranty's Consolidated Balance Sheets at December 31, 2019 and 2018 are as follows: December 31, (in thousands) 2019 2018 Deferred tax assets: Allowance for loan losses $ 1,720 $ 2,159 Other real estate owned 257 28 Unrealized losses on available for sale securities — 1,897 Net operating loss 1,282 1,374 Other 508 456 Gross deferred tax assets 3,767 5,914 Deferred tax liabilities: Depreciation and amortization (2,010 ) (1,537 ) Core deposit intangibles (1,359 ) (552 ) Unrealized gains on available for sale securities (578 ) — Discount on purchased loans (267 ) — Other (670 ) (589 ) Gross deferred tax liabilities (4,884 ) (2,678 ) Net deferred tax (liabilities) assets $ (1,117 ) $ 3,236 At December 31, 2019, First Guaranty had recorded a net deferred tax liability position. First Guaranty determined that the net deferred tax asset at December 31, 2018 was more likely than not to be realized based on an assessment of all available positive and negative evidence, and therefore no valuation allowance was recorded. Net operating loss carryforwards for income tax purposes were $6.1 million as of December 31, 2019 and $6.5 million in 2018 . The carryforwards were acquired in 2017 in the Premier acquisition and expire from 2027 to 2034 , and will be utilized subject to annual Internal Revenue Code Section 382 limitations. ASC 740-10, Income Taxes, clarifies the accounting for uncertainty in income taxes and prescribes a recognition threshold and measurement attribute for the consolidated financial statements recognition and measurement of a tax position taken or expected to be taken in a tax return. First Guaranty does not believe it has any unrecognized tax benefits included in its consolidated financial statements. First Guaranty has not had any settlements in the current period with taxing authorities, nor has it recognized tax benefits as a result of a lapse of the applicable statute of limitations. First Guaranty recognizes interest and penalties accrued related to unrecognized tax benefits, if applicable, in noninterest expense. During the years ended December 31, 2019 , 2018 and 2017 , First Guaranty did not recognize any interest or penalties in its consolidated financial statements, nor has it recorded an accrued liability for interest or penalty payments.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Off-balance sheet commitments First Guaranty is a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers and to reduce its own exposure to fluctuations in interest rates. These financial instruments include commitments to extend credit and standby and commercial letters of credit. Those instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the Consolidated Balance Sheets. The contract or notional amounts of those instruments reflect the extent of the involvement in particular classes of financial instruments. The exposure to credit loss in the event of nonperformance by the other party to the financial instrument for commitments to extend credit and standby and commercial letters of credit is represented by the contractual notional amount of those instruments. Unless otherwise noted, collateral or other security is not required to support financial instruments with credit risk. Set forth below is a summary of the notional amounts of the financial instruments with off-balance sheet risk at December 31, 2019 and December 31, 2018 . Contract Amount December 31, 2019 December 31, 2018 (in thousands) Commitments to Extend Credit $ 117,826 $ 108,348 Unfunded Commitments under lines of credit $ 148,127 $ 122,212 Commercial and Standby letters of credit $ 11,258 $ 6,912 Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since commitments may expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. Each customer's creditworthiness is evaluated on a case-by-case basis. The amount of collateral obtained, if deemed necessary upon extension of credit, is based on Management's credit evaluation of the counterpart. Collateral requirements vary but may include accounts receivable, inventory, property, plant and equipment, residential real estate and commercial properties. Standby and commercial letters of credit are conditional commitments to guarantee the performance of a customer to a third party. These guarantees are primarily issued to support public and private borrowing arrangements, including commercial paper, bond financing and similar transactions. The majority of these guarantees are short-term, one year or less; however, some guarantees extend for up to three years . The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities. Collateral requirements are the same as on-balance sheet instruments and commitments to extend credit. There were no losses incurred on off-balance sheet commitments in 2019 , 2018 or 2017 . First Guaranty currently has one new facility under construction with total construction commitment of $10.1 million of which $6.8 million has been incurred as of December 31, 2019.

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The fair value of a financial instrument is the current amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. A fair value measurement assumes that the transaction to sell the asset or transfer the liability occurs in the principal market for the asset or liability or, in the absence of a principal market, the most advantageous market for the asset or liability. Valuation techniques use certain inputs to arrive at fair value. Inputs to valuation techniques are the assumptions that market participants would use in pricing the asset or liability. They may be observable or unobservable. First Guaranty uses a fair value hierarchy for valuation inputs that gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. The fair value hierarchy is as follows: Level 1 Inputs – Unadjusted quoted market prices in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date. Level 2 Inputs – Inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. These might include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (such as interest rates, volatilities, prepayment speeds or credit risks) or inputs that are derived principally from or corroborated by market data by correlation or other means. Level 3 Inputs – Unobservable inputs for determining the fair values of assets or liabilities that reflect an entity's own assumptions about the assumptions that market participants would use in pricing the assets or liabilities. A description of the valuation methodologies used for instruments measured at fair value follows, as well as the classification of such instruments within the valuation hierarchy. Securities available for sale. Securities are classified within Level 1 where quoted market prices are available in an active market. Inputs include securities that have quoted prices in active markets for identical assets. If quoted market prices are unavailable, fair value is estimated using quoted prices of securities with similar characteristics, at which point the securities would be classified within Level 2 of the hierarchy. Securities classified Level 3 as of December 31, 2019 includes corporate debt and municipal securities. Impaired loans . Loans are measured for impairment using the methods permitted by ASC Topic 310. Fair value of impaired loans is measured by either the fair value of the collateral if the loan is collateral dependent (Level 2 or Level 3), or the present value of expected future cash flows, discounted at the loan's effective interest rate (Level 3). Fair value of the collateral is determined by appraisals or by independent valuation. Other real estate owned. Properties are recorded at the balance of the loan or at estimated fair value less estimated selling costs, whichever is less, at the date acquired. Fair values of other real estate owned ("OREO") at December 31, 2019 and 2018 are determined by sales agreement or appraisal, and costs to sell are based on estimation per the terms and conditions of the sales agreement or amounts commonly used in real estate transactions. Inputs include appraisal values or recent sales activity for similar assets in the property's market; thus OREO measured at fair value would be classified within either Level 2 or Level 3 of the hierarchy. Certain non-financial assets and non-financial liabilities are measured at fair value on a non-recurring basis including assets and liabilities related to reporting units measured at fair value in the testing of goodwill impairment, as well as intangible assets and other non-financial long-lived assets measured at fair value for impairment assessment. The following table summarizes financial assets measured at fair value on a recurring basis as of December 31, 2019 and 2018 , segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value: (in thousands) December 31, 2019 December 31, 2018 Available for Sale Securities Fair Value Measurements Using: Level 1: Quoted Prices in Active Markets For Identical Assets $ 497 $ 483 Level 2: Significant Other Observable Inputs 330,539 291,733 Level 3: Significant Unobservable Inputs 9,398 4,761 Securities available for sale measured at fair value $ 340,434 $ 296,977 First Guaranty's valuation methodologies may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. While Management believes the methodologies used are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value. The change in Level 1 securities available for sale from December 31, 2018 was due principally to changes in market values on Level 1 securities. The change in Level 2 securities available for sale from December 31, 2018 was due principally to a reduction in agency, municipal and corporate bonds related to sales and maturities. There were no transfers between Level 1 and 2 securities available for sale from December 31, 2018 to December 31, 2019 . The following table reconciles assets measured at fair value on a recurring basis using unobservable inputs ( Level 3 ): Level 3 Changes (in thousands) December 31, 2019 December 31, 2018 Balance, beginning of year $ 4,761 $ 6,533 Total gains or losses (realized/unrealized): Included in earnings — (15 ) Included in other comprehensive income 146 (79 ) Purchases, sales, issuances and settlements, net 4,491 (1,886 ) Transfers in and/or out of Level 3 — 208 Balance as of end of year $ 9,398 $ 4,761 There were no gains or losses for the period included in earnings attributable to the change in unrealized gains or losses relating to assets still held as of December 31, 2019 . The following table measures financial assets and financial liabilities measured at fair value on a non-recurring basis as of December 31, 2019 , segregated by the level of valuation inputs within the fair value hierarchy utilized to measure fair value: (in thousands) At December 31, 2019 At December 31, 2018 Fair Value Measurements Using: Impaired Loans Level 1: Quoted Prices in Active Markets For Identical Assets $ — $ — Level 2: Significant Other Observable Inputs — — Level 3: Significant Unobservable Inputs 4,046 3,620 Impaired loans measured at fair value $ 4,046 $ 3,620 Fair Value Measurements Using: Other Real Estate Owned Level 1: Quoted Prices in Active Markets For Identical Assets $ — $ — Level 2: Significant Other Observable Inputs 4,158 1,012 Level 3: Significant Unobservable Inputs 721 126 Other real estate owned measured at fair value $ 4,879 $ 1,138 ASC 825-10 provides First Guaranty with an option to report selected financial assets and liabilities at fair value. The fair value option established by this statement permits First Guaranty to choose to measure eligible items at fair value at specified election dates and report unrealized gains and losses on items for which the fair value option has been elected in earnings at each reporting date subsequent to implementation. First Guaranty has chosen not to elect the fair value option for any items that are not already required to be measured at fair value in accordance with accounting principles generally accepted in the United States.

Financial Instruments

Financial Instruments	12 Months Ended
	Dec. 31, 2019
Financial Instruments, Owned, at Fair Value [Abstract]
Financial Instruments	Financial Instruments Fair value estimates are generally subjective in nature and are dependent upon a number of significant assumptions associated with each instrument or group of similar instruments, including estimates of discount rates, risks associated with specific financial instruments, estimates of future cash flows and relevant available market information. Fair value information is intended to represent an estimate of an amount at which a financial instrument could be exchanged in a current transaction between a willing buyer and seller engaging in an exchange transaction. However, since there are no established trading markets for a significant portion of First Guaranty's financial instruments, First Guaranty may not be able to immediately settle financial instruments; as such, the fair values are not necessarily indicative of the amounts that could be realized through immediate settlement. In addition, the majority of the financial instruments, such as loans and deposits, are held to maturity and are realized or paid according to the contractual agreement with the customer. Quoted market prices are used to estimate fair values when available. However, due to the nature of the financial instruments, in many instances quoted market prices are not available. Accordingly, estimated fair values have been estimated based on other valuation techniques, such as discounting estimated future cash flows using a rate commensurate with the risks involved or other acceptable methods. Fair values are estimated without regard to any premium or discount that may result from concentrations of ownership of financial instruments, possible income tax ramifications or estimated transaction costs. The fair value estimates are subjective in nature and involve matters of significant judgment and, therefore, cannot be determined with precision. Fair values are also estimated at a specific point in time and are based on interest rates and other assumptions at that date. As events change the assumptions underlying these estimates, the fair values of financial instruments will change. Disclosure of fair values is not required for certain items such as lease financing, investments accounted for under the equity method of accounting, obligations of pension and other postretirement benefits, premises and equipment, other real estate, prepaid expenses, the value of long-term relationships with depositors (core deposit intangibles) and other customer relationships, other intangible assets and income tax assets and liabilities. Fair value estimates are presented for existing on- and off-balance sheet financial instruments without attempting to estimate the value of anticipated future business and the value of assets and liabilities that are not considered financial instruments. In addition, the tax ramifications related to the realization of the unrealized gains and losses have not been considered in the estimates. Accordingly, the aggregate fair value amounts presented do not purport to represent and should not be considered representative of the underlying market or franchise value of First Guaranty. Because the standard permits many alternative calculation techniques and because numerous assumptions have been used to estimate the fair values, reasonable comparison of the fair value information with other financial institutions' fair value information cannot necessarily be made. The methods and assumptions used to estimate the fair values of financial instruments are as follows: Cash and due from banks, interest-bearing deposits with banks, federal funds sold and federal funds purchased . These items are generally short-term and the carrying amounts reported in the consolidated balance sheets are a reasonable estimation of the fair values. Investment Securities. Fair values are principally based on quoted market prices. If quoted market prices are not available, fair values are based on quoted market prices of comparable instruments or the use of discounted cash flow analyses. Loans Held for Sale. Fair values of mortgage loans held for sale are based on commitments on hand from investors or prevailing market prices. These loans are classified within level 3 of the fair value hierarchy. Loans, net . Market values are computed present values using net present value formulas. The present value is the sum of the present value of all projected cash flows on an item at a specified discount rate. The discount rate is set as an appropriate rate index, plus or minus an appropriate spread. These loans are classified within level 3 of the fair value hierarchy. Impaired loans. Fair value of impaired loans is measured by either the fair value of the collateral if the loan is collateral dependent (Level 2 or Level 3), or the present value of expected future cash flows, discounted at the loan's effective interest rate (Level 3). Fair value of the collateral is determined by appraisals or by independent valuation. Accrued interest receivable. The carrying amount of accrued interest receivable approximates its fair value. Deposits. Market values are actually computed present values using net present value formulas. The present value is the sum of the present value of all projected cash flows on an item at a specified discount rate. The discount rate is set as an appropriate rate index, plus or minus an appropriate spread. Deposits are classified within level 3 of the fair value hierarchy. Accrued interest payable. The carrying amount of accrued interest payable approximates its fair value. Borrowings . The carrying amount of federal funds purchased and other short-term borrowings approximate their fair values. The fair value of First Guaranty's long-term borrowings is computed using net present value formulas. The present value is the sum of the present value of all projected cash flows on an item at a specified discount rate. The discount rate is set as an appropriate rate index, plus or minus an appropriate spread. Borrowings are classified within level 3 of the fair value hierarchy. Other Unrecognized Financial Instruments. The fair value of commitments to extend credit is estimated using the fees charged to enter into similar legally binding agreements, taking into account the remaining terms of the agreements and customers' credit ratings. For fixed-rate loan commitments, fair value also considers the difference between current levels of interest rates and the committed rates. Noninterest-bearing deposits are held at cost. The fair values of letters of credit are based on fees charged for similar agreements or on estimated cost to terminate them or otherwise settle the obligations with the counterparties at the reporting date. At December 31, 2019 and 2018 the fair value of guarantees under commercial and standby letters of credit was not material. The estimated fair values and carrying values of the financial instruments at December 31, 2019 and 2018 are presented in the following table: December 31, 2019 2018 (in thousands) Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value Assets Cash and cash equivalents $ 67,425 $ 67,425 $ 127,965 $ 127,965 Securities, available for sale $ 340,434 $ 340,434 $ 296,977 $ 296,977 Securities, held to maturity $ 86,579 $ 86,817 $ 108,326 $ 104,840 Federal Home Loan Bank stock $ 3,308 $ 3,308 $ 2,393 $ 2,393 Loans held for sale $ — $ — $ 344 $ 379 Loans, net $ 1,514,561 $ 1,515,277 $ 1,214,492 $ 1,193,886 Accrued interest receivable $ 8,412 $ 8,412 $ 6,716 $ 6,716 Liabilities Deposits $ 1,853,013 $ 1,863,179 $ 1,629,622 $ 1,625,827 Borrowings $ 72,010 $ 71,969 $ 19,838 $ 19,853 Junior subordinated debentures $ 14,737 $ 14,762 $ 14,700 $ 14,537 Accrued interest payable $ 6,047 $ 6,047 $ 3,952 $ 3,952 There is no material difference between the contract amount and the estimated fair value of off-balance sheet items that are primarily comprised of short-term unfunded loan commitments that are generally at market prices.

Concentrations of Credit and Ot

Concentrations of Credit and Other Risks	12 Months Ended
	Dec. 31, 2019
Risks and Uncertainties [Abstract]
Concentrations of Credit and Other Risks	Concentrations of Credit and Other Risks First Guaranty monitors loan portfolio concentrations by region, collateral type, loan type, and industry on a monthly basis and has established maximum thresholds as a percentage of its capital to ensure that the desired mix and diversification of its loan portfolio is achieved. First Guaranty is compliant with the established thresholds as of December 31, 2019 . Personal, commercial and residential loans are granted to customers, most of who reside in northern and southern areas of Louisiana. Although First Guaranty has a diversified loan portfolio, significant portions of the loans are collateralized by real estate located in Tangipahoa Parish and surrounding parishes in Southeast Louisiana. Declines in the Louisiana economy could result in lower real estate values which could, under certain circumstances, result in losses to First Guaranty. The distribution of commitments to extend credit approximates the distribution of loans outstanding. Commercial and standby letters of credit were granted primarily to commercial borrowers. Approximately 33.0% of First Guaranty's deposits are derived from local governmental agencies at December 31, 2019 . These governmental depositing authorities are generally long-term customers. A number of the depositing authorities are under contractual obligation to maintain their operating funds exclusively with First Guaranty. In most cases, First Guaranty is required to pledge securities or letters of credit issued by the Federal Home Loan Bank to the depositing authorities to collateralize their deposits. Under certain circumstances, the withdrawal of all of, or a significant portion of, the deposits of one or more of the depositing authorities may result in a temporary reduction in liquidity, depending primarily on the maturities and/or classifications of the securities pledged against such deposits and the ability to replace such deposits with either new deposits or other borrowings. Public fund deposits totaled $610.7 million at December 31, 2019 .

Litigation

Litigation	12 Months Ended
	Dec. 31, 2019
Loss Contingency [Abstract]
Litigation	Litigation First Guaranty is subject to various legal proceedings in the normal course of its business. First Guaranty assesses its liabilities and contingencies in connection with outstanding legal proceedings. Where it is probable that First Guaranty will incur a loss and the amount of the loss can be reasonably estimated, First Guaranty records a liability in its consolidated financial statements. First Guaranty does not record a loss if the loss is not probable or the amount of the loss is not estimable. First Guaranty is a defendant in a lawsuit alleging overpayment of interest on a loan with a possible loss range of $0.0 million to $0.5 million . Judgment has been rendered against First Guaranty for the full amount, but First Guaranty is exercising its appeal rights. First Guaranty had an accrued liability of $0.1 million at December 31, 2019 related to this lawsuit. First Guaranty is also a defendant in a lawsuit alleging fault for a loss of funds by a customer with a possible loss range of $0.0 million to $1.5 million . No accrued liability has been recorded related to this lawsuit.

Condensed Parent Company Inform

Condensed Parent Company Information	12 Months Ended
	Dec. 31, 2019
Condensed Financial Information Disclosure [Abstract]
Condensed Parent Company Information	Condensed Parent Company Information The following condensed financial information reflects the accounts and transactions of First Guaranty Bancshares, Inc. for the dates indicated: First Guaranty Bancshares, Inc. Condensed Balance Sheets December 31, (in thousands) 2019 2018 Assets Cash $ 633 $ 8,069 Investment in bank subsidiary 224,677 169,880 Other assets 4,427 4,724 Total Assets $ 229,737 $ 182,673 Liabilities and Shareholders' Equity Senior long-term debt 48,558 19,838 Junior subordinated debentures 14,738 14,700 Other liabilities 406 851 Total Liabilities 63,702 35,389 Shareholders' Equity 166,035 147,284 Total Liabilities and Shareholders' Equity $ 229,737 $ 182,673 First Guaranty Bancshares, Inc. Condensed Statements of Income December 31, (in thousands) 2019 2018 2017 Operating Income Dividends received from bank subsidiary $ 13,982 $ 11,788 $ 10,622 Net gains on sale of equity securities 196 — 54 Other income 424 289 171 Total operating income 14,602 12,077 10,847 Operating Expenses Interest expense 1,795 1,675 1,518 Salaries & Benefits 208 133 495 Other expenses 953 916 1,147 Total operating expenses 2,956 2,724 3,160 Income before income tax benefit and increase in equity in undistributed earnings of subsidiary 11,646 9,353 7,687 Income tax benefit 494 540 834 Income before increase in equity in undistributed earnings of subsidiary 12,140 9,893 8,521 Increase in equity in undistributed earnings of subsidiary 2,101 4,320 3,230 Net Income $ 14,241 $ 14,213 $ 11,751 First Guaranty Bancshares, Inc. Condensed Statements of Cash Flows December 31, (in thousands) 2019 2018 2017 Cash flows from operating activities: Net income $ 14,241 $ 14,213 $ 11,751 Adjustments to reconcile net income to net cash provided by operating activities: Increase in equity in undistributed earnings of subsidiary (2,101 ) (4,320 ) (3,230 ) Depreciation and amortization 80 43 43 Gain on sale of securities (196 ) — (54 ) Net change in other liabilities (444 ) 136 187 Net change in other assets (601 ) 1,360 (1,306 ) Net cash provided by operating activities 10,979 11,432 7,391 Cash flows from investing activities: Proceeds from maturities, calls and sales of AFS securities — — 134 Proceeds from sales of equity securities 1,196 — — Funds invested in bank subsidiary — — (3,750 ) Purchases of premises and equipment (136 ) — — Cash paid in acquisition (43,383 ) — (10,108 ) Net cash used in investing activities (42,323 ) — (13,724 ) Cash flows from financing activities: Proceeds from long-term debt, net of costs 32,465 — 3,750 Repayment of long-term debt (3,754 ) (2,941 ) (3,081 ) Proceeds from junior subordinated debentures, net of costs — — — Common stock issued in private placement 1,000 — — Dividends paid (5,803 ) (5,636 ) (5,210 ) Net cash provided by (used in) financing activities 23,908 (8,577 ) (4,541 ) Net (decrease) increase in cash and cash equivalents (7,436 ) 2,855 (10,874 ) Cash and cash equivalents at the beginning of the period 8,069 5,214 16,088 Cash and cash equivalents at the end of the period $ 633 $ 8,069 $ 5,214

Business and Summary of Signi_2

Business and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
Consolidation	Consolidation The consolidated financial statements include the accounts of First Guaranty Bancshares, Inc., and its wholly owned subsidiary, First Guaranty Bank. All significant intercompany balances and transactions have been eliminated in consolidation.
Acquisition Accounting	Acquisition Accounting Acquisitions are accounted for under the purchase method of accounting. Purchased assets, including identifiable intangibles, and assumed liabilities are recorded at their respective acquisition date fair values. If the fair value of net assets purchased exceeds the consideration given, a gain on acquisition is recognized. If the consideration given exceeds the fair value of the net assets received, goodwill 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 estimated fair value on their purchase date with no carryover of the related allowance for loan losses. See Acquired Loans section below for accounting policy regarding loans acquired in a business combination.
Use of estimates	Use of estimates The preparation of financial statements in conformity with generally accepted accounting principles requires Management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the dates of the financial statements and the reported amounts of revenue and expense during the reporting periods. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change in the near-term relate to the determination of the allowance for loan losses, the valuation of real estate acquired in connection with foreclosures or in satisfaction of loans, and the valuation of investment securities. In connection with the determination of the allowance for loan losses and real estate owned, First Guaranty obtains independent appraisals for significant properties.
Cash and cash equivalents	Cash and cash equivalents For purposes of reporting cash flows, cash and cash equivalents are defined as cash, due from banks, interest-bearing demand deposits with banks and federal funds sold with maturities of three months or less.
Securities	Securities First Guaranty reviews its financial position, liquidity and future plans in evaluating the criteria for classifying investment securities. Debt securities that Management has the ability and intent to hold to maturity are classified as held to maturity and carried at cost, adjusted for amortization of premiums and accretion of discounts using methods approximating the interest method. Securities available for sale are stated at fair value. The unrealized difference, if any, between amortized cost and fair value of these AFS securities is excluded from income and is reported, net of deferred taxes, in accumulated other comprehensive income as a part of shareholders' equity. Details of other comprehensive income are reported in the consolidated statements of comprehensive income. Realized gains and losses on securities are computed based on the specific identification method and are reported as a separate component of other income. Amortization of premiums and discounts is included in interest income. Discounts and premiums related to debt securities are amortized using the effective interest rate method. Management evaluates securities for other-than-temporary impairment ("OTTI") at least on a quarterly basis, and more frequently when economic or market conditions warrant such an evaluation. In estimating other-than-temporary losses, management considers the length of time and extent that fair value has been less than cost and the financial condition and near term prospects of the issuer. Management also assesses whether it intends to sell, or it is more likely than not that it will be required to sell, a security in an unrealized loss position before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the entire difference between amortized cost and fair value is recognized as impairment through earnings. For debt securities that do not meet the aforementioned criteria, the amount of impairment is split into two components as follows: 1) OTTI related to credit loss, which must be recognized in the income statement and 2) OTTI related to other factors, which is recognized in other comprehensive income. The credit loss is defined as the difference between the present value of the cash flows expected to be collected and the amortized cost basis.
Loans held for sale	Loans held for sale Mortgage loans originated and intended for sale in the secondary market are carried at the lower of cost or estimated fair value in the aggregate. Net unrealized losses, if any, are recognized through a valuation allowance by charges to income. Loans held for sale have primarily been fixed rate single-family residential mortgage loans under contract to be sold in the secondary market. In most cases, loans in this category are sold within thirty days. Buyers generally have recourse to return a purchased loan under limited circumstances. Recourse conditions may include early payment default, breach of representations or warranties and documentation deficiencies. Mortgage loans held for sale are generally sold with the mortgage servicing rights released. Gains or losses on sales of mortgage loans are recognized based on the differences between the selling price and the carrying value of the related mortgage loans sold.
Loans	Loans Loans are stated at the principal amounts outstanding, net of unearned income and deferred loan fees. In addition to loans issued in the normal course of business, overdrafts on customer deposit accounts are considered to be loans and reclassified as such. Interest income on all classifications of loans is calculated using the simple interest method on daily balances of the principal amount outstanding. Accrual of interest is discontinued on a loan when Management believes, after considering economic and business conditions and collection efforts, the borrower's financial condition is such that reasonable doubt exists as to the full and timely collection of principal and interest. This evaluation is made for all loans that are 90 days or more contractually past due. When a loan is placed in nonaccrual status, all interest previously accrued but not collected is reversed against current period interest income. Income on such loans is then recognized only to the extent that cash is received and where the future collection of interest and principal is probable. Loans are returned to accrual status when, in the judgment of Management, all principal and interest amounts contractually due are reasonably assured to be collected within a reasonable time frame and when the borrower has demonstrated payment performance of cash or cash equivalents; generally for a period of 6 months . All loans, except mortgage loans, are considered past due if they are past due 30 days. Mortgage loans are considered past due when two consecutive payments have been missed. Loans that are past due 90 - 120 days and deemed uncollectible are charged-off. The loan charge off is a reduction of the allowance for loan losses.
Troubled Debt Restructurings (TDRs)	Troubled Debt Restructurings (TDRs) TDRs are loans in which the borrower is experiencing financial difficulty at the time of restructuring, and the Bank has granted a concession to the borrower. TDRs are undertaken in order to improve the likelihood of recovery on the loan and may take the form of modifications made with the stated interest rate lower than the current market rate for new debt with similar risk, other modifications to the structure of the loan that fall outside of normal underwriting policies and procedures, or in limited circumstances forgiveness of principal and / or interest. TDRs can involve loans remaining on non-accrual, moving to non-accrual, or continuing on accrual status, depending on the individual facts and circumstances of the borrower. TDRs are subject to policies governing accrual and non-accrual evaluation consistent with all other loans as discussed in the "Loans" section above. All loans with the TDR designation are considered to be impaired, even if they are accruing. First Guaranty's policy is to evaluate TDRs that have subsequently been restructured and returned to market terms after 6 months of performance. The evaluation includes a review of the loan file and analysis of the credit to assess the loan terms, including interest rate to insure such terms are consistent with market terms. The loan terms are compared to a sampling of loans with similar terms and risk characteristics, including loans originated by First Guaranty and loans lost to a competitor. The sample provides a guide to determine market terms pursuant to ASC 310-40-50-2. The loan is also evaluated at that time for impairment. A loan determined to be restructured to market terms and not considered impaired will no longer be disclosed as a TDR in the years following the restructuring. These loans will continue to be individually evaluated for impairment. A loan determined to either be restructured to below market terms or to be impaired will remain a TDR.
Credit Quality	Credit Quality First Guaranty's credit quality indicators are pass, special mention, substandard, and doubtful. Loans included in the pass category are performing loans with satisfactory debt coverage ratios, collateral, payment history, and documentation requirements. Special mention loans have potential weaknesses that deserve close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects. Borrowers may be experiencing adverse operating trends (declining revenues or margins) or an ill proportioned balance sheet (e.g., increasing inventory without an increase in sales, high leverage, tight liquidity). Adverse economic or market conditions, such as interest rate increases or the entry of a new competitor, may also support a special mention rating. Nonfinancial reasons include management problems, pending litigation, an ineffective loan agreement or other material structural weakness, and any other significant deviation from prudent lending practices. A substandard loan is inadequately protected by the paying capacity of the obligor or of the collateral pledged, if any. Loans classified as substandard have a well-defined weakness. They are characterized by the distinct possibility that First Guaranty will sustain some loss if the deficiencies are not corrected. These loans require more intensive supervision. Substandard loans are generally characterized by current or expected unprofitable operations, inadequate debt service coverage, inadequate liquidity, or marginal capitalization. Repayment may depend on collateral or other credit risk mitigates. For some substandard loans, the likelihood of full collection of interest and principal may be in doubt and interest is no longer accrued. Consumer loans that are 90 days or more past due or that are nonaccrual are considered substandard. Doubtful loans have the weaknesses of substandard loans with the additional characteristic that the weaknesses make collection or liquidation in full questionable and there is a high probability of loss based on currently existing facts, conditions and values. A loan is considered impaired when, based on current information and events, it is probable that First Guaranty will be unable to collect the scheduled payments of principal or interest when 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. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower's prior payment record and the amount of the shortfall in relation to the principal and interest owed. Impairment is measured on a loan-by-loan basis for commercial and construction loans by either the present value of expected future cash flows discounted at the loan's effective interest rate, the loan's obtainable market price or the fair value of the collateral if the loan is collateral dependent. This process is only applied to impaired loans or relationships in excess of $500,000 . Large groups of smaller balance homogeneous loans are collectively evaluated for impairment. Accordingly, individual consumer and residential loans are not separately identified for impairment disclosures, unless such loans are the subject of a restructuring agreement. Loans that have been restructured in a troubled debt restructuring will continue to be evaluated individually for impairment, including those no longer requiring disclosure.
Acquired Loans	Acquired Loans Loans are recorded at estimated fair value on their purchase date with no carryover of the related allowance for loan losses. Acquired loans are segregated between those with deteriorated credit quality at acquisition and those deemed as performing. To make this determination, Management considers such factors as past due status, nonaccrual status, credit risk ratings, interest rates and collateral position. The fair value of acquired loans deemed performing is determined by discounting cash flows, both principal and interest, for each pool at prevailing market interest rates as well as consideration of inherent potential losses. The difference between the fair value and principal balances due at acquisition date, the fair value discount, is accreted into income over the estimated life of each loan pool. Loans acquired in a business combination are recorded at their estimated fair value on their purchase date with no carryover of the related allowance for loan losses. Performing acquired loans are subsequently evaluated for any required allowance at each reporting date. An allowance for loan losses is calculated using a similar methodology for originated loans.
Loan fees and costs	Loan fees and costs Nonrefundable loan origination and commitment fees and direct costs associated with originating loans are deferred and recognized over the lives of the related loans as an adjustment to the loans' yield using the level yield method.
Allowance for loan losses	Allowance for loan losses The allowance for loan losses is established through a provision for loan losses charged to expense. Loans are charged against the allowance for loan losses when Management believes that the collectability of the principal is unlikely. The allowance, which is based on evaluation of the collectability of loans and prior loan loss experience, is an amount that, in the opinion of Management, reflects the risks inherent in the existing loan portfolio and exists at the reporting date. The evaluations take into consideration a number of subjective factors including changes in the nature and volume of the loan portfolio, historical losses, overall portfolio quality, review of specific problem loans, current economic conditions that may affect a borrower's ability to pay, adequacy of loan collateral and other relevant factors. In addition, regulatory agencies, as an integral part of their examination process, periodically review the estimated losses on loans. Such agencies may require additional recognition of losses based on their judgments about information available to them at the time of their examination. The following are general credit risk factors that affect First Guaranty's loan portfolio segments. These factors do not encompass all risks associated with each loan category. Construction and land development loans have risks associated with interim construction prior to permanent financing and repayment risks due to the future sale of developed property. Farmland and agricultural loans have risks such as weather, government agricultural policies, fuel and fertilizer costs, and market price volatility. 1-4 family, multi-family, and consumer credits are strongly influenced by employment levels, consumer debt loads and the general economy. Non-farm non-residential loans include both owner occupied real estate and non-owner occupied real estate. Common risks associated with these properties is the ability to maintain tenant leases and keep lease income at a level able to service required debt and operating expenses. Commercial and industrial loans generally have non-real estate secured collateral which requires closer monitoring than real estate collateral. Although Management uses available information to recognize losses on loans, because of uncertainties associated with local economic conditions, collateral values and future cash flows on impaired loans, it is reasonably possible that a material change could occur in the allowance for loan losses in the near term. However, the amount of the change that is reasonably possible cannot be estimated. The evaluation of the adequacy of loan collateral is often based upon estimates and appraisals. Because of changing economic conditions, the valuations determined from such estimates and appraisals may also change. Accordingly, First Guaranty may ultimately incur losses that vary from Management's current estimates. Adjustments to the allowance for loan losses will be reported in the period such adjustments become known or can be reasonably estimated. All loan losses are charged to the allowance for loan losses when the loss actually occurs or when the collectability of the principal is unlikely. Recoveries are credited to the allowance at the time of recovery. The allowance consists of specific, general, and unallocated components. The specific component relates to loans that are classified as doubtful, substandard, and impaired. For such loans that are also 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. Also, a specific reserve is allocated for syndicated loans. The general component covers non-classified loans and special mention loans and is based on historical loss experience adjusted for qualitative factors. An unallocated component is maintained to cover uncertainties that could affect the estimate of probable losses. The allowance for loan losses is reviewed on a monthly basis. The monitoring of credit risk also extends to unfunded credit commitments, such as unused commercial credit lines and letters of credit. A reserve is established as needed for estimates of probable losses on such commitments.
Goodwill and intangible assets	Goodwill and intangible assets Goodwill and intangible assets deemed to have indefinite lives are subject to annual impairment tests. First Guaranty's goodwill is tested for impairment on an annual basis, or more often if events or circumstances indicate that there may be impairment. Adverse changes in the economic environment, declining operations, or other factors could result in a decline in the implied fair value of goodwill. If the implied fair value is less than the carrying amount, a loss would be recognized in other non-interest expense to reduce the carrying amount to implied fair value of goodwill. The goodwill impairment test includes two steps that are preceded by a, "step zero", qualitative test. The qualitative test allows Management to assess whether qualitative factors indicate that it is more likely than not that impairment exists. If it is not more likely than not that impairment exists, then no impairment exists and the two step quantitative test would not be necessary. These qualitative indicators include factors such as earnings, share price, market conditions, etc. If the qualitative factors indicate that it is more likely than not that impairment exists, then the two step quantitative test would be necessary. Step one is used to identify potential impairment and compares the estimated fair value of a reporting unit with its carrying amount, including goodwill. If the estimated fair value of a reporting unit exceeds its carrying amount, goodwill of the reporting unit is not considered impaired. If the carrying amount of a reporting unit exceeds its estimated fair value, the second step of the goodwill impairment test is performed to measure the amount of impairment loss, if any. Step two of the goodwill impairment test compares the implied estimated fair value of reporting unit goodwill with the carrying amount of that goodwill. If the carrying amount of goodwill for that reporting unit exceeds the implied fair value of that unit's goodwill, an impairment loss is recognized in an amount equal to that excess. Identifiable intangible assets are acquired assets that lack physical substance but can be distinguished from goodwill because of contractual or legal rights or because the assets are capable of being sold or exchanged either on their own or in combination with the related contract, asset or liability. First Guaranty's intangible assets primarily relate to core deposits and loan servicing assets related to the SBA portfolio. These core deposit intangibles are amortized on a straight-line basis over terms ranging from seven to fifteen years. Management periodically evaluates whether events or circumstances have occurred that impair this deposit intangible.
Premises and equipment	Premises and equipment Premises and equipment are stated at cost, less accumulated depreciation. Depreciation is computed for financial reporting purposes using the straight-line method over the estimated useful lives of the respective assets as follows: Buildings and improvements 10 - 40 years Equipment, fixtures and automobiles 3 - 10 years Expenditures for renewals and betterments are capitalized and depreciated over their estimated useful lives. Repairs, maintenance and minor improvements are charged to operating expense as incurred. Gains or losses on disposition, if any, are recorded as a separate line item in noninterest income on the Statements of Income .
Other real estate	Other real estate Other real estate includes properties acquired through foreclosure or acceptance of deeds in lieu of foreclosure. These properties are recorded at the lower of the recorded investment in the property or its fair value less the estimated cost of disposition. Any valuation adjustments required prior to foreclosure are charged to the allowance for loan losses. Subsequent to foreclosure, losses on the periodic revaluation of the property are charged to current period earnings as other real estate expense. Costs of operating and maintaining the properties are charged to other real estate expense as incurred. Any subsequent gains or losses on dispositions are credited or charged to income in the period of disposition .
Off-balance sheet financial instruments	Off-balance sheet financial instruments In the ordinary course of business, First Guaranty has entered into commitments to extend credit, including commitments under credit card arrangements, commitments to fund commercial real estate, construction and land development loans secured by real estate, and performance standby letters of credit. Such financial instruments are recorded when they are funded.
Income taxes	Income taxes First Guaranty and its subsidiary file a consolidated federal income tax return on a calendar year basis. In lieu of Louisiana state income tax, the Bank is subject to the Louisiana bank shares tax, which is included in noninterest expense in First Guaranty's consolidated financial statements. With few exceptions, First Guaranty is no longer subject to U.S. federal, state or local income tax examinations for years before 2016. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax basis. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which the deferred tax assets or liabilities are expected to be settled or realized. Valuation allowances are established when necessary to reduce deferred tax assets to the amount expected to be utilized.
Comprehensive income	Comprehensive income Accounting principles generally require that recognized revenue, expenses, gains and losses be included in net income. Although certain changes in assets and liabilities, such as unrealized gains and losses on available for sale securities, are reported as a separate component of the equity section of the balance sheet, such items along with net income, are components of comprehensive income. The components of other comprehensive income and related tax effects are presented in the Statements of Comprehensive Income.
Fair Value Measurements	Fair Value Measurements The fair value of a financial instrument is the current amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. A fair value measurement assumes that the transaction to sell the asset or transfer the liability occurs in the principal market for the asset or liability or, in the absence of a principal market, the most advantageous market for the asset or liability. Valuation techniques use certain inputs to arrive at fair value. Inputs to valuation techniques are the assumptions that market participants would use in pricing the asset or liability. They may be observable or unobservable. First Guaranty uses a fair value hierarchy for valuation inputs that gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. See Note 20 for a detailed description of fair value measurements.
Transfers of Financial Assets	Transfers of Financial Assets Transfers of financial assets are accounted for as sales, when control over the assets has been surrendered. Control over transferred assets is deemed to be surrendered when (i) the assets have been isolated from First Guaranty, (ii) the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets, and (iii) First Guaranty does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity.
Earnings per common share	Earnings per common share Earnings per share represents income available to common shareholders divided by the weighted average number of common shares outstanding during the period. In December of 2019, First Guaranty issued a pro rata, 10% common stock dividend. The shares issued for the stock dividend have been retrospectively factored into the calculation of earnings per share as well as cash dividends paid on common stock and represented on the face of the financial statements. No convertible shares of First Guaranty's stock are outstanding.
Operating Segments	Operating Segments All of First Guaranty's operations are considered by management to be aggregated into one reportable operating segment. While the chief decision-makers monitor the revenue streams of the various products and services, the identifiable segments are not material. Operations are managed and financial performance is evaluated on a Company-wide basis.
Reclassifications	Reclassifications Certain reclassifications have been made to prior year end financial statements in order to conform to the classification adopted for reporting in 2019 .
Recent Accounting Pronouncements	Recent Accounting Pronouncements In February 2016, the FASB issued ASU 2016-02, "Leases: Conforming Amendments Related to Leases". This ASU amends the codification regarding leases in order to increase transparency and comparability. The ASU requires companies to recognize lease assets and liabilities on the balance sheet and disclose key information about leasing arrangements. A lessee would recognize a liability to make lease payments and a right-of-use asset representing its right to use the leased asset for the lease term. During 2018 and early 2019, the FASB issued ASU No. 2018-11, "Targeted Improvements", ASU No. 2018-20, "Narrow-Scope Improvements for Lessors", and ASU No. 2019-01, "Codification Improvements", which clarified certain implementation issues, provided an additional optional transition method and clarified the disclosure requirements during the period of adopting ASU 2016-02, among others. The ASU is effective for annual and interim periods beginning after December 15, 2018. First Guaranty adopted this ASU in the first quarter of 2019. As a result of adopting this ASU, First Guaranty established a right-to-use asset and a lease liability as of January 1, 2019 of $0.9 million . The right-to-use asset represents First Guaranty's right to use an underlying asset for the lease term and is included in other assets on First Guaranty's consolidated balance sheets. The lease liability represents First Guaranty's obligation to make lease payments and is included in other liabilities on First Guaranty's consolidated balance sheets. First Guaranty does not expect material changes to the recognition of lease expense in future periods as a result of the adopting this ASU. In June 2016, the FASB issued ASU 2016-13, "Financial Instruments- Credit Losses: Measurement of Credit Losses on Financial Instruments". This ASU amends guidance on reporting credit losses for assets held at amortized cost basis and available for sale debt securities. The ASU amendments require the measurement of all expected credit losses for financial assets held at the reporting date be based on historical experience, current conditions, and reasonable and supportable forecasts. The ASU requires assets held at cost basis to reflect the company's current estimate of all expected credit losses. For available for sale debt securities, credit losses should be presented as an allowance rather than as a write-down. In addition, this ASU amends the accounting for purchased financial assets with credit deterioration. On October 16, 2019, the FASB approved an effective date delay applicable to smaller reporting companies until fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. First Guaranty is currently evaluating the impact of this accounting standard and is implementing a new software application to assist in determining the impact on the Consolidated Financial Statements. In January 2017, the FASB issued ASU 2017-04, "Intangibles - Goodwill and Other: Simplifying the Test for Goodwill Impairment". This ASU amends the guidance on impairment testing. The ASU eliminates Step 2 from the goodwill impairment test. The annual, or interim, goodwill impairment test is performed by comparing the fair value of a reporting unit with its carrying amount. An impairment charge should be recognized for the amount by which the carrying amount exceeds the reporting unit's fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. In addition, income tax effects from any tax deductible goodwill on the carrying amount of the reporting unit should be considered when measuring the goodwill impairment loss, if applicable. The ASU also eliminates the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment and, if it fails that qualitative test, to perform Step 2 of the goodwill impairment test. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. This ASU is effective for annual and interim periods beginning after December 15, 2019. First Guaranty is currently evaluating the impact of the adoption of this guidance on the Consolidated Financial Statements. In August 2018, the FASB issued ASU No. 2018-13, "Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement." This ASU removes, modifies, and adds certain disclosure requirements for fair value measurements. For example, public entities will no longer be required to disclose the valuation processes for Level 3 fair value measurements, but will be required to disclose the range and weighted average used to develop significant unobservable inputs for Level 3 fair value measurements. This ASU is effective for interim and annual reporting periods beginning after December 15, 2019. In addition, entities may early adopt the modified or eliminated disclosure requirements and delay adoption of the additional disclosure requirements until their effective date. First Guaranty does not believe the adoption of this ASU will have a material impact on the Consolidated Financial Statements, as the update only revises disclosure requirements. In December 2019, the FASB issued ASU No. 2019-12, "Income Taxes: Simplifying the Accounting for Income Taxes". This ASU removes specific exceptions to the general principles in Topic 740, Income Taxes. The amendments also improve consistent application of and simplify GAAP for other areas of Topic 740 by clarifying and amending existing guidance. This ASU is effective for annual and interim periods beginning after December 15, 2020, with early adoption in any interim period permitted. First Guaranty is currently evaluating the impact of this accounting standard on the Consolidated Financial Statements.

Merger Transaction (Tables)

Merger Transaction (Tables)	12 Months Ended
	Dec. 31, 2019
Business Combinations [Abstract]
Fair Value of Tangible and Intangible Assets Acquired and Liabilities Assumed	Based on management's preliminary valuation of tangible and intangible assets acquired and liabilities assumed, the purchase price for the Union acquisition is allocated in the table below. These allocations are subject to change. (in thousands) Union Bancshares, Incorporated Cash and due from banks $ 20,058 Securities available for sale 38,813 Loans 184,165 Premises and equipment 7,223 Goodwill 9,469 Intangible assets 4,213 Other real estate 1,595 Other assets 9,303 Total assets acquired $ 274,839 Deposits 204,983 FHLB borrowings 16,617 Repurchase agreements 6,863 Other liabilities 2,993 Total liabilities assumed $ 231,456 Net assets acquired $ 43,383
Pro Forma Information	The following pro forma information for the twelve months ended December 31, 2019 and December 31, 2018 reflects First Guaranty's estimated consolidated results of operations as if the acquisition of Union occurred at January 1, 2018, unadjusted for potential cost savings. (in thousands, except share data) 2019 2018 Net Interest Income $ 70,105 $ 67,194 Noninterest Income 9,877 7,075 Noninterest Expense 54,482 51,261 Net Income 16,459 17,259 Earnings per common share $ 1.70 $ 1.78

Securities (Tables)

Securities (Tables)	12 Months Ended
	Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Summary Comparison of Securities by Type	A summary comparison of securities by type at December 31, 2019 and 2018 is shown below. December 31, 2019 December 31, 2018 (in thousands) Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Available for sale: U.S. Treasuries $ — $ — $ — $ — $ — $ — $ — $ — U.S. Government Agencies 16,380 15 (2 ) 16,393 146,911 — (5,522 ) 141,389 Corporate debt securities 94,561 1,110 (302 ) 95,369 76,310 72 (3,504 ) 72,878 Other securities 497 — — 497 483 — — 483 Municipal bonds 30,297 1,870 (14 ) 32,153 32,956 1,120 (175 ) 33,901 Collateralized mortgage obligations 16,400 40 (43 ) 16,397 918 — (14 ) 904 Mortgage-backed securities 179,546 317 (238 ) 179,625 48,434 — (1,012 ) 47,422 Total available for sale securities $ 337,681 $ 3,352 $ (599 ) $ 340,434 $ 306,012 $ 1,192 $ (10,227 ) $ 296,977 Held to maturity: U.S. Government Agencies $ 18,175 $ — $ (32 ) $ 18,143 $ 28,172 $ — $ (1,081 ) $ 27,091 Municipal bonds 5,107 182 — 5,289 5,227 — (101 ) 5,126 Mortgage-backed securities 63,297 200 (112 ) 63,385 74,927 — (2,304 ) 72,623 Total held to maturity securities $ 86,579 $ 382 $ (144 ) $ 86,817 $ 108,326 $ — $ (3,486 ) $ 104,840
Investments Classified by Contractual Maturity Date	The scheduled maturities of securities at December 31, 2019 , by contractual maturity, are shown below. Actual maturities may differ from contractual maturities due to call or prepayments. Mortgage-backed securities are not due at a single maturity because of amortization and potential prepayment of the underlying mortgages. For this reason they are presented separately in the maturity table below. December 31, 2019 (in thousands) Amortized Cost Fair Value Available for sale: Due in one year or less $ 4,499 $ 4,520 Due after one year through five years 38,029 38,729 Due after five years through 10 years 76,584 77,943 Over 10 years 22,623 23,220 Subtotal 141,735 144,412 Collateralized mortgage obligations 16,400 16,397 Mortgage-backed Securities 179,546 179,625 Total available for sale securities $ 337,681 $ 340,434 Held to maturity: Due in one year or less $ 5,050 $ 5,047 Due after one year through five years 7,327 7,318 Due after five years through 10 years 7,496 7,543 Over 10 years 3,409 3,524 Subtotal 23,282 23,432 Mortgage-backed Securities 63,297 63,385 Total held to maturity securities $ 86,579 $ 86,817
Schedule of Unrealized Loss on Investments	The following is a summary of the fair value of securities with gross unrealized losses and an aging of those gross unrealized losses at December 31, 2019 . December 31, 2019 Less Than 12 Months 12 Months or More Total (in thousands) Number of Securities Fair Value Gross Unrealized Losses Number of Securities Fair Value Gross Unrealized Losses Number of Securities Fair Value Gross Unrealized Losses Available for sale: U.S. Treasuries — $ — $ — — $ — $ — — $ — $ — U.S. Government Agencies 1 4,398 (1 ) 1 149 (1 ) 2 4,547 (2 ) Corporate debt securities 42 21,269 (174 ) 12 3,184 (128 ) 54 24,453 (302 ) Other securities — — — — — — — — — Municipal bonds 9 4,285 (14 ) — — — 9 4,285 (14 ) Collateralized mortgage obligations 12 10,022 (43 ) — — — 12 10,022 (43 ) Mortgage-backed securities 57 91,753 (186 ) 9 12,121 (52 ) 66 103,874 (238 ) Total available for sale securities 121 $ 131,727 $ (418 ) 22 $ 15,454 $ (181 ) 143 $ 147,181 $ (599 ) Held to maturity: U.S. Government Agencies 2 $ 2,177 $ (2 ) 8 $ 15,965 $ (30 ) 10 $ 18,142 $ (32 ) Municipal bonds — — — 1 50 — 1 50 — Mortgage-backed securities 7 8,880 (58 ) 10 11,343 (54 ) 17 20,223 (112 ) Total held to maturity securities 9 $ 11,057 $ (60 ) 19 $ 27,358 $ (84 ) 28 $ 38,415 $ (144 ) The following is a summary of the fair value of securities with gross unrealized losses and an aging of those gross unrealized losses at December 31, 2018 . December 31, 2018 Less Than 12 Months 12 Months or More Total (in thousands) Number of Securities Fair Value Gross Unrealized Losses Number of Securities Fair Value Gross Unrealized Losses Number of Securities Fair Value Gross Unrealized Losses Available for sale: U.S. Treasuries — $ — $ — — $ — $ — — $ — $ — U.S. Government Agencies 1 4,227 (273 ) 50 137,162 (5,249 ) 51 141,389 (5,522 ) Corporate debt securities 37 9,560 (252 ) 183 58,877 (3,252 ) 220 68,437 (3,504 ) Other securities — — — — — — — — — Municipal bonds 1 115 — 19 8,436 (175 ) 20 8,551 (175 ) Collateralized mortgage obligations — — — 5 904 (14 ) 5 904 (14 ) Mortgage-backed securities 16 19,453 (73 ) 38 27,969 (939 ) 54 47,422 (1,012 ) Total available for sale securities 55 $ 33,355 $ (598 ) 295 $ 233,348 $ (9,629 ) 350 $ 266,703 $ (10,227 ) Held to maturity: U.S. Government Agencies — $ — $ — 14 $ 27,091 $ (1,081 ) 14 $ 27,091 $ (1,081 ) Municipal bonds — — — 9 5,126 (101 ) 9 5,126 (101 ) Mortgage-backed securities — — — 56 72,623 (2,304 ) 56 72,623 (2,304 ) Total held to maturity securities — $ — $ — 79 $ 104,840 $ (3,486 ) 79 $ 104,840 $ (3,486 )
Credit Losses on Debt Securities for which Portion of OTTI Recognized in OCI	The following table presents a roll-forward of the amount of credit losses on debt securities held by First Guaranty for which a portion of OTTI was recognized in other comprehensive income for the year ended December 31, 2019 , 2018 , and 2017 : (in thousands) Year Ended December 31, 2019 Year Ended December 31, 2018 Year Ended December 31, 2017 Beginning balance of credit losses at beginning of year $ 60 $ 60 $ 60 Other-than-temporary impairment credit losses on securities not previously OTTI — — — Increases for additional credit losses on securities previously determined to be OTTI — — — Reduction for increases in cash flows — — — Reduction due to credit impaired securities sold or fully settled (60 ) — — Ending balance of cumulative credit losses recognized in earnings at end of year $ — $ 60 $ 60
Schedule of Exposure to Investment Securities Issuers that Exceeded 10% of Shareholder's Equity	At December 31, 2019 , First Guaranty's exposure to investment securities issuers that exceeded 10% of shareholders' equity was as follows: December 31, 2019 (in thousands) Amortized Cost Fair Value Federal Home Loan Mortgage Corporation (Freddie Mac-FHLMC) 96,966 97,036 Federal National Mortgage Association (Fannie Mae-FNMA) 146,702 146,758 Federal Farm Credit Bank (FFCB) 18,227 18,211 Total $ 261,895 $ 262,005

Loans (Tables)

Loans (Tables)	12 Months Ended
	Dec. 31, 2019
Receivables [Abstract]
Summary of Components of Loan Portfolio	The following table summarizes the components of First Guaranty's loan portfolio as of December 31, 2019 and December 31, 2018 : December 31, 2019 December 31, 2018 (in thousands except for %) Balance As % of Category Balance As % of Category Real Estate: Construction & land development $ 172,247 11.3 % $ 124,644 10.1 % Farmland 22,741 1.5 % 18,401 1.5 % 1- 4 Family 289,635 18.9 % 172,760 14.1 % Multifamily 23,973 1.6 % 42,918 3.5 % Non-farm non-residential 616,536 40.3 % 586,263 47.7 % Total Real Estate 1,125,132 73.6 % 944,986 76.9 % Non-Real Estate: Agricultural 26,710 1.8 % 23,108 1.9 % Commercial and industrial 268,256 17.5 % 200,877 16.4 % Consumer and other 108,868 7.1 % 59,443 4.8 % Total Non-Real Estate 403,834 26.4 % 283,428 23.1 % Total Loans Before Unearned Income 1,528,966 100.0 % 1,228,414 100.0 % Unearned income (3,476 ) (3,146 ) Total Loans Net of Unearned Income $ 1,525,490 $ 1,225,268
Summary of Fixed and Floating Rate Loans by Contractual Maturity, Excluding Nonaccrual Loans	The following table summarizes fixed and floating rate loans by contractual maturity, excluding nonaccrual loans, as of December 31, 2019 and December 31, 2018 unadjusted for scheduled principal payments, prepayments, or repricing opportunities. The average life of the loan portfolio may be substantially less than the contractual terms when these adjustments are considered. December 31, 2019 December 31, 2018 (in thousands) Fixed Floating Total Fixed Floating Total One year or less $ 205,596 $ 104,859 $ 310,455 $ 108,160 $ 80,895 $ 189,055 One to five years 509,455 286,131 795,586 393,344 287,737 681,081 Five to 15 years 147,502 65,713 213,215 118,715 86,779 205,494 Over 15 years 143,695 51,612 195,307 85,611 58,430 144,041 Subtotal $ 1,006,248 $ 508,315 1,514,563 $ 705,830 $ 513,841 1,219,671 Nonaccrual loans 14,403 8,743 Total Loans Before Unearned Income 1,528,966 1,228,414 Unearned income (3,476 ) (3,146 ) Total Loans Net of Unearned Income $ 1,525,490 $ 1,225,268
Past due Financing Receivables	The following tables present the age analysis of past due loans at December 31, 2019 and December 31, 2018 : As of December 31, 2019 (in thousands) 30-89 Days Past Due 90 Days or Greater Past Due Total Past Due Current Total Loans Recorded Investment 90 Days Accruing Real Estate: Construction & land development $ 760 $ 429 $ 1,189 $ 171,058 $ 172,247 $ 48 Farmland 6 1,274 1,280 21,461 22,741 — 1- 4 family 8,521 3,682 12,203 277,432 289,635 923 Multifamily — — — 23,973 23,973 — Non-farm non-residential 11,279 6,249 17,528 599,008 616,536 1,603 Total Real Estate 20,566 11,634 32,200 1,092,932 1,125,132 2,574 Non-Real Estate: Agricultural 310 4,800 5,110 21,600 26,710 — Commercial and industrial 2,801 342 3,143 265,113 268,256 15 Consumer and other 794 266 1,060 107,808 108,868 50 Total Non-Real Estate 3,905 5,408 9,313 394,521 403,834 65 Total Loans Before Unearned Income $ 24,471 $ 17,042 $ 41,513 $ 1,487,453 1,528,966 $ 2,639 Unearned income (3,476 ) Total Loans Net of Unearned Income $ 1,525,490 As of December 31, 2018 (in thousands) 30-89 Days Past Due 90 Days or Greater Past Due Total Past Due Current Total Loans Recorded Investment 90 Days Accruing Real Estate: Construction & land development $ 936 $ 311 $ 1,247 $ 123,397 $ 124,644 $ — Farmland — 1,293 1,293 17,108 18,401 — 1- 4 family 4,333 2,272 6,605 166,155 172,760 26 Multifamily 648 — 648 42,270 42,918 — Non-farm non-residential 4,897 864 5,761 580,502 586,263 — Total Real Estate 10,814 4,740 15,554 929,432 944,986 26 Non-Real Estate: Agricultural 528 3,651 4,179 18,929 23,108 — Commercial and industrial 742 370 1,112 199,765 200,877 53 Consumer and other 537 127 664 58,779 59,443 66 Total Non-Real Estate 1,807 4,148 5,955 277,473 283,428 119 Total Loans Before Unearned Income $ 12,621 $ 8,888 $ 21,509 $ 1,206,905 1,228,414 $ 145 Unearned income (3,146 ) Total Loans Net of Unearned Income $ 1,225,268
Summary of Nonaccrual Loans by Class	The following is a summary of nonaccrual loans by class at the dates indicated: As of December 31, (in thousands) 2019 2018 Real Estate: Construction & land development $ 381 $ 311 Farmland 1,274 1,293 1- 4 family 2,759 2,246 Multifamily — — Non-farm non-residential 4,646 864 Total Real Estate 9,060 4,714 Non-Real Estate: Agricultural 4,800 3,651 Commercial and industrial 327 317 Consumer and other 216 61 Total Non-Real Estate 5,343 4,029 Total Nonaccrual Loans $ 14,403 $ 8,743
Credit Exposure of Loan Portfolio, Including Loans Acquired with Deteriorated Credit Quality, by Specific Credit Ratings	The following table identifies the credit exposure of the loan portfolio, including loans acquired with deteriorated credit quality, by specific credit ratings as of the dates indicated: As of December 31, 2019 As of December 31, 2018 (in thousands) Pass Special Mention Substandard Doubtful Total Pass Special Mention Substandard Doubtful Total Real Estate: Construction & land development $ 163,808 $ 6,180 $ 2,259 $ — $ 172,247 $ 116,062 $ 5,698 $ 2,884 $ — $ 124,644 Farmland 18,223 3,177 1,341 — 22,741 13,151 3,888 1,362 — 18,401 1- 4 family 271,392 4,751 13,492 — 289,635 160,581 2,815 9,364 — 172,760 Multifamily 16,025 805 7,143 — 23,973 35,554 — 7,364 — 42,918 Non-farm non-residential 589,800 7,743 18,993 — 616,536 564,993 2,888 17,859 523 586,263 Total Real Estate 1,059,248 22,656 43,228 — 1,125,132 890,341 15,289 38,833 523 944,986 Non-Real Estate: Agricultural 21,529 48 5,133 — 26,710 19,050 43 4,015 — 23,108 Commercial and industrial 262,416 1,199 4,641 — 268,256 186,176 10,930 3,771 — 200,877 Consumer and other 108,618 180 70 — 108,868 59,119 151 173 — 59,443 Total Non-Real Estate 392,563 1,427 9,844 — 403,834 264,345 11,124 7,959 — 283,428 Total Loans Before Unearned Income $ 1,451,811 $ 24,083 $ 53,072 $ — 1,528,966 $ 1,154,686 $ 26,413 $ 46,792 $ 523 1,228,414 Unearned income (3,476 ) (3,146 ) Total Loans Net of Unearned Income $ 1,525,490 $ 1,225,268
Carrying Amount of Purchased Impaired Loans	The carrying amount of those loans is as follows at December 31, 2019 and 2018 . (in thousands) As of December 31, 2019 As of December 31, 2018 Real Estate: Construction & land development $ 526 $ — Farmland — 1 1- 4 family 6,402 48 Multifamily — — Non-farm non-residential 2,294 2,301 Total Real Estate 9,222 2,350 Non-Real Estate: Agricultural — — Commercial and industrial 1,198 909 Consumer and other — — Total Non-Real Estate 1,198 909 Total $ 10,420 $ 3,259
Accretable Yield, or Income Expected to be Collected, on Purchased Loans	The accretable yield, or income expected to be collected, on the purchased loans above is as follows for the years ended December 31, 2019 and 2018 . (in thousands) Year Ended December 31, 2019 Year Ended December 31, 2018 Balance, beginning of period $ 613 $ 1,031 Acquisition accretable yield 3,367 — Accretion (831 ) (418 ) Net transfers from nonaccretable difference to accretable yield 498 — Balance, end of period $ 3,647 $ 613

Allowance for Loan Losses (Tabl

Allowance for Loan Losses (Tables)	12 Months Ended
	Dec. 31, 2019
Allowance for Credit Loss [Abstract]
Summary of Changes in Allowance for Loan Losses and Allowance and Loans Individually and Collectively Evaluated for Impairment	A summary of changes in the allowance for loan losses, by loan type, for the years ended December 31, 2019 , 2018 and 2017 are as follows: As of December 31, 2019 2018 (in thousands) Beginning Allowance (12/31/18) Charge-offs Recoveries Provision Ending Allowance (12/31/19) Beginning Allowance (12/31/17) Charge-offs Recoveries Provision Ending Allowance (12/31/18) Real Estate: Construction & land development $ 581 $ — $ — $ (158 ) $ 423 $ 628 $ — $ 3 $ (50 ) $ 581 Farmland 41 — — 9 50 5 — — 36 41 1- 4 family 911 (552 ) 39 629 1,027 1,078 (99 ) 90 (158 ) 911 Multifamily 1,318 — — (280 ) 1,038 994 — 20 304 1,318 Non-farm non-residential 4,771 (2,603 ) 5 3,104 5,277 2,811 (404 ) 89 2,275 4,771 Total Real Estate 7,622 (3,155 ) 44 3,304 7,815 5,516 (503 ) 202 2,407 7,622 Non-Real Estate: Agricultural 339 (40 ) — (204 ) 95 187 (300 ) 26 426 339 Commercial and industrial 1,909 (879 ) 267 612 1,909 2,377 (179 ) 1,642 (1,931 ) 1,909 Consumer and other 891 (1,190 ) 246 1,163 1,110 1,125 (907 ) 216 457 891 Unallocated 15 — — (15 ) — 20 — — (5 ) 15 Total Non-Real Estate 3,154 (2,109 ) 513 1,556 3,114 3,709 (1,386 ) 1,884 (1,053 ) 3,154 Total $ 10,776 $ (5,264 ) $ 557 $ 4,860 $ 10,929 $ 9,225 $ (1,889 ) $ 2,086 $ 1,354 $ 10,776 As of December 31, 2017 (in thousands) Beginning Allowance (12/31/16) Charge-offs Recoveries Provision Ending Allowance (12/31/17) Real Estate: Construction & land development $ 1,232 $ — $ 43 $ (647 ) $ 628 Farmland 19 — — (14 ) 5 1- 4 family 1,204 (33 ) 92 (185 ) 1,078 Multifamily 591 — 40 363 994 Non-farm non-residential 3,451 (1,291 ) 85 566 2,811 Total Real Estate 6,497 (1,324 ) 260 83 5,516 Non-Real Estate: Agricultural 74 (162 ) 138 137 187 Commercial and industrial 3,543 (3,629 ) 30 2,433 2,377 Consumer and other 972 (1,247 ) 223 1,177 1,125 Unallocated 28 — — (8 ) 20 Total Non-Real Estate 4,617 (5,038 ) 391 3,739 3,709 Total $ 11,114 $ (6,362 ) $ 651 $ 3,822 $ 9,225 A summary of the allowance and loans, including loans acquired with deteriorated credit quality, individually and collectively evaluated for impairment are as follows: As of December 31, 2019 (in thousands) Allowance Individually Evaluated for Impairment Allowance Individually Evaluated for Purchased Credit-Impairment Allowance Collectively Evaluated for Impairment Total Allowance for Credit Losses Loans Individually Evaluated for Impairment Loans Individually Evaluated for Purchased Credit-Impairment Loans Collectively Evaluated for Impairment Total Loans before Unearned Income Real Estate: Construction & land development $ — $ — $ 423 $ 423 $ — $ 526 $ 171,721 $ 172,247 Farmland — — 50 50 543 — 22,198 22,741 1- 4 family 34 — 993 1,027 1,058 6,402 282,175 289,635 Multifamily — — 1,038 1,038 — — 23,973 23,973 Non-farm non-residential 1,879 — 3,398 5,277 12,120 2,294 602,122 616,536 Total Real Estate 1,913 — 5,902 7,815 13,721 9,222 1,102,189 1,125,132 Non-Real Estate: Agricultural — — 95 95 4,030 — 22,680 26,710 Commercial and industrial 111 — 1,798 1,909 2,981 1,198 264,077 268,256 Consumer and other — — 1,110 1,110 — — 108,868 108,868 Unallocated — — — — — — — — Total Non-Real Estate 111 — 3,003 3,114 7,011 1,198 395,625 403,834 Total $ 2,024 $ — $ 8,905 $ 10,929 $ 20,732 $ 10,420 $ 1,497,814 $ 1,528,966 Unearned Income (3,476 ) Total Loans Net of Unearned Income $ 1,525,490 As of December 31, 2018 (in thousands) Allowance Individually Evaluated for Impairment Allowance Individually Evaluated for Purchased Credit-Impairment Allowance Collectively Evaluated for Impairment Total Allowance for Credit Losses Loans Individually Evaluated for Impairment Loans Individually Evaluated for Purchased Credit-Impairment Loans Collectively Evaluated for Impairment Total Loans before Unearned Income Real Estate: Construction & land development $ 38 $ — $ 543 $ 581 $ 304 $ — $ 124,340 $ 124,644 Farmland — — 41 41 552 1 17,848 18,401 1- 4 family — — 911 911 631 48 172,081 172,760 Multifamily — — 1,318 1,318 — — 42,918 42,918 Non-farm non-residential 1,152 — 3,619 4,771 4,881 2,301 579,081 586,263 Total Real Estate 1,190 — 6,432 7,622 6,368 2,350 936,268 944,986 Non-Real Estate: Agricultural — — 339 339 2,983 — 20,125 23,108 Commercial and industrial 110 — 1,799 1,909 1,088 909 198,880 200,877 Consumer and other — — 891 891 — — 59,443 59,443 Unallocated — — 15 15 — — — — Total Non-Real Estate 110 — 3,044 3,154 4,071 909 278,448 283,428 Total $ 1,300 $ — $ 9,476 $ 10,776 $ 10,439 $ 3,259 $ 1,214,716 $ 1,228,414 Unearned Income (3,146 ) Total Loans Net of Unearned Income $ 1,225,268
Summary of Impaired Loans, Excluding Loans Acquired with Deteriorated Credit Quality, by Class	The following is a summary of impaired loans, excluding loans acquired with deteriorated credit quality, by class at December 31, 2019 : As of December 31, 2019 (in thousands) Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized Interest Income Cash Basis Impaired Loans with no related allowance: Real Estate: Construction & land development $ — $ — $ — $ — $ — $ — Farmland 543 552 — 550 — — 1- 4 family 541 541 — 544 27 22 Multifamily — — — — — — Non-farm non-residential 8,307 8,307 — 9,940 673 688 Total Real Estate 9,391 9,400 — 11,034 700 710 Non-Real Estate: Agricultural 4,030 4,186 — 4,031 12 — Commercial and industrial 1,962 1,962 — 1,788 81 67 Consumer and other — Total Non-Real Estate 5,992 6,148 — 5,819 93 67 Total Impaired Loans with no related allowance 15,383 15,548 — 16,853 793 777 Impaired Loans with an allowance recorded: Real estate: Construction & land development — — — — — — Farmland — — — — — — 1- 4 family 517 517 34 522 — — Multifamily — — — — — — Non-farm non-residential 3,813 4,162 1,879 4,134 194 212 Total Real Estate 4,330 4,679 1,913 4,656 194 212 Non-Real Estate: Agricultural — — — — — — Commercial and industrial 1,019 1,019 111 1,039 81 77 Consumer and other — — — — — — Total Non-Real Estate 1,019 1,019 111 1,039 81 77 Total Impaired Loans with an allowance recorded 5,349 5,698 2,024 5,695 275 289 Total Impaired Loans $ 20,732 $ 21,246 $ 2,024 $ 22,548 $ 1,068 $ 1,066 The following is a summary of impaired loans, excluding loans acquired with deteriorated credit quality, by class at December 31, 2018 : As of December 31, 2018 (in thousands) Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized Interest Income Cash Basis Impaired Loans with no related allowance: Real Estate: Construction & land development $ — $ — $ — $ — $ — $ — Farmland — — — — — — 1- 4 family 631 631 — 626 13 — Multifamily — — — — — — Non-farm non-residential 523 523 — 536 33 34 Total Real Estate 1,154 1,154 — 1,162 46 34 Non-Real Estate: Agricultural 3,535 3,613 — 3,583 173 272 Commercial and industrial — — — — — — Consumer and other — — — — — — Total Non-Real Estate 3,535 3,613 — 3,583 173 272 Total Impaired Loans with no related allowance 4,689 4,767 — 4,745 219 306 Impaired Loans with an allowance recorded: Real estate: Construction & land development — — — — — — Farmland — — — — — — 1- 4 family — — — — — — Multifamily — — — — — — Non-farm non-residential 3,070 3,070 1,150 3,104 139 139 Total Real Estate 3,070 3,070 1,150 3,104 139 139 Non-Real Estate: Agricultural — — — — — — Commercial and industrial 1,088 1,088 110 1,115 55 64 Consumer and other — — — — — — Total Non-Real Estate 1,088 1,088 110 1,115 55 64 Total Impaired Loans with an allowance recorded 4,158 4,158 1,260 4,219 194 203 Total Impaired Loans $ 8,847 $ 8,925 $ 1,260 $ 8,964 $ 413 $ 509
Troubled Debt Restructurings	The following table is an age analysis of TDRs as of December 31, 2019 and December 31, 2018 : December 31, 2019 December 31, 2018 Accruing Loans Accruing Loans (in thousands) Current 30-89 Days Past Due Nonaccrual Total TDRs Current 30-89 Days Past Due Nonaccrual Total TDRs Real Estate: Construction & land development $ — $ — $ — $ — $ — $ — $ 304 $ 304 Farmland — — — — — — — — 1- 4 family — — — — — — — — Multifamily — — — — — — — — Non-farm non-residential — — — — 1,288 — — 1,288 Total Real Estate — — — — 1,288 — 304 1,592 Non-Real Estate: Agricultural — — — — — — — — Commercial and industrial — — — — — — — — Consumer and other — — — — — — — — Total Non-Real Estate — — — — — — — — Total $ — $ — $ — $ — $ 1,288 $ — $ 304 $ 1,592 The following table discloses TDR activity for the twelve months ended December 31, 2019 . Trouble Debt Restructured Loans Activity Twelve Months Ended December 31, 2019 (in thousands) Beginning balance (December 31, 2018) New TDRs Charge-offs post-modification Transferred to ORE Paydowns Construction to permanent financing Restructured to market terms Other adjustments Ending balance (December 31, 2019) Real Estate: Construction & land development $ 304 $ — $ — $ — $ — $ — $ (304 ) $ — $ — Farmland — — — — — — — — — 1- 4 family — — — — — — — — — Multifamily — — — — — — — — — Non-farm non-residential 1,288 — — — — — (1,288 ) — — Total Real Estate 1,592 — — — — — (1,592 ) — — Non-Real Estate: Agricultural — — — — — — — — — Commercial and industrial — — — — — — — — — Consumer and other — — — — — — — — — Total Non-Real Estate — — — — — — — — — Total Impaired Loans with no related allowance $ 1,592 $ — $ — $ — $ — $ — $ (1,592 ) $ — $ —

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2019
Property, Plant and Equipment [Abstract]
Premises and Equipment	The components of premises and equipment at December 31, 2019 and 2018 are as follows: (in thousands) December 31, 2019 December 31, 2018 Land $ 15,180 $ 12,875 Bank premises 40,536 33,457 Furniture and equipment 27,255 25,453 Construction in progress 9,534 2,046 Acquired value 92,505 73,831 Less: accumulated depreciation 36,041 34,136 Net book value $ 56,464 $ 39,695

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-lived Intangible Assets	The following table summarizes intangible assets subject to amortization. December 31, 2019 December 31, 2018 (in thousands) Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Core deposit intangibles $ 16,266 $ 9,739 $ 6,527 $ 12,053 $ 9,349 $ 2,704 Loan servicing assets 1,558 918 640 1,441 617 824 Total $ 17,824 $ 10,657 $ 7,167 $ 13,494 $ 9,966 $ 3,528
Amortization Expense of Core Deposit Intangible Assets for Next Five Years	Amortization expense of the core deposit intangible assets for the next five years is as follows: For the Years Ended Estimated Amortization Expense (in thousands) December 31, 2020 $ 712 December 31, 2021 $ 644 December 31, 2022 $ 576 December 31, 2023 $ 576 December 31, 2024 $ 576

Other Real Estate (Tables)

Other Real Estate (Tables)	12 Months Ended
	Dec. 31, 2019
Real Estate [Abstract]
Components of Other Real Estate Owned	Other real estate owned consists of the following at the dates indicated: (in thousands) December 31, 2019 December 31, 2018 Real Estate Owned Acquired by Foreclosure: Residential $ 559 $ 120 Construction & land development 669 241 Non-farm non-residential 3,651 777 Total Other Real Estate Owned and Foreclosed Property $ 4,879 $ 1,138

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2019
Deposits [Abstract]
Schedule of Maturities of All Time Deposits	A schedule of maturities of all time deposits are as follows: (in thousands) December 31, 2019 2020 $ 344,758 2021 90,279 2022 77,623 2023 101,672 2024 and thereafter 141,695 Total $ 756,027

Borrowings (Tables)

Borrowings (Tables)	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Schedule of Short-term Borrowings	Short-term borrowings are summarized as follows: (in thousands) December 31, 2019 December 31, 2018 Federal Home Loan Bank advances $ 13,079 $ — Repurchase agreements 6,840 Line of credit — — Total short-term borrowings $ 19,919 $ —
Short-term Borrowings	The following schedule provides certain information about First Guaranty's short-term borrowings for the periods indicated: December 31, (in thousands except for %) 2019 2018 2017 Outstanding at year end $ 19,919 $ — $ 15,500 Maximum month-end outstanding $ 19,919 $ 37,000 $ 28,000 Average daily outstanding $ 3,320 $ 7,119 $ 5,833 Weighted average rate during the year 2.00 % 2.21 % 1.06 % Weighted average rate at year end 2.00 % — % 1.51 %
Obligations on Senior Long-term Debt and Junior Subordinated Debentures	As of December 31, 2019 obligations on senior long-term debt and junior subordinated debentures totaled $63.3 million . The scheduled maturities are as follows: (in thousands) Senior Long-term Debt Junior Subordinated Debentures 2020 $ 19,349 $ — 2021 3,250 — 2022 3,250 — 2023 3,250 — 2024 19,500 — 2024 and thereafter — 15,000 Subtotal $ 48,599 $ 15,000 Debt issuance costs (41 ) (263 ) Total $ 48,558 $ 14,737

Capital Requirements (Tables)

Capital Requirements (Tables)	12 Months Ended
	Dec. 31, 2019
Banking and Thrift [Abstract]
Actual and Required Capital Amounts and Ratios	First Guaranty Bank's actual capital amounts and ratios as of December 31, 2019 and 2018 are presented in the following table. Actual Minimum Capital Requirements Minimum to be Well Capitalized Under Action Provisions (in thousands except for %) Amount Ratio Amount Ratio Amount Ratio December 31, 2019 Total Risk-based Capital: $ 213,962 12.61 % $ 135,697 8.00 % $ 169,621 10.00 % Tier 1 Capital: $ 203,034 11.96 % $ 101,773 6.00 % $ 135,697 8.00 % Tier 1 Leverage Capital: $ 203,033 10.44 % $ 77,771 4.00 % $ 97,214 5.00 % Common Equity Tier One Capital: $ 203,034 11.96 % $ 76,329 4.50 % $ 110,254 6.50 % December 31, 2018 Total Risk-based Capital: $ 181,618 12.97 % $ 112,055 8.00 % $ 140,069 10.00 % Tier 1 Capital: $ 170,842 12.20 % $ 84,041 6.00 % $ 112,055 8.00 % Tier 1 Leverage Capital: $ 170,842 9.79 % $ 69,822 4.00 % $ 87,277 5.00 % Common Equity Tier One Capital: $ 170,842 12.20 % $ 63,031 4.50 % $ 91,045 6.50 %

Related Party Transactions (Tab

Related Party Transactions (Tables)	12 Months Ended
	Dec. 31, 2019
Related Party Transactions [Abstract]
Schedule of Related Party Transactions	An analysis of the activity of loans made to such borrowers during the year ended December 31, 2019 and 2018 follows: December 31, (in thousands) 2019 2018 Balance, beginning of year $ 63,907 $ 82,918 Net (Decrease) Increase (2,087 ) (19,011 ) Balance, end of year $ 61,820 $ 63,907

Other Expenses (Tables)

Other Expenses (Tables)	12 Months Ended
	Dec. 31, 2019
Other Expenses [Abstract]
Summary of Significant Components of Other Noninterest Expense	The following is a summary of the significant components of other noninterest expense: December 31, (in thousands) 2019 2018 2017 Other noninterest expense: Legal and professional fees $ 2,648 $ 2,362 $ 3,049 Data processing 1,972 1,692 1,608 ATM Fees 1,217 1,214 1,161 Marketing and public relations 1,456 1,329 1,205 Taxes - sales, capital and franchise 1,094 1,066 970 Operating supplies 674 562 496 Software expense and amortization 1,308 1,119 923 Travel and lodging 908 978 910 Telephone 193 208 167 Amortization of core deposits 390 545 432 Donations 603 380 322 Net costs from other real estate and repossessions 422 186 306 Regulatory assessment 683 941 726 Other 2,536 2,204 1,628 Total other noninterest expense $ 16,104 $ 14,786 $ 13,903

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Summary of Provision for Income Taxes	The following is a summary of the provision for income taxes included in the Consolidated Statements of Income: December 31, (in thousands) 2019 2018 2017 Current $ 3,770 $ 3,929 $ 4,638 Deferred (114 ) (467 ) 2,761 Total $ 3,656 $ 3,462 $ 7,399
Effective Income Tax Rate Reconciliation	The difference between income taxes computed by applying the statutory federal income tax rate and the provision for income taxes in the financial statements is reconciled as follows: December 31, (in thousands except for %) 2019 2018 2017 Statutory tax rate 21.0 % 21.0 % 35.0 % Federal income taxes at statutory rate $ 3,758 $ 3,712 $ 6,703 Tax exempt municipal income (140 ) (166 ) (254 ) Other (1) 38 (84 ) 950 Total $ 3,656 $ 3,462 $ 7,399 (1) Included in other for the year ended December 31, 2017 is $0.9 million related to the estimated net impact from the remeasurement of deferred tax assets and liabilities as a result of the passage of the Tax Cuts and Jobs Act in December 2017.
Components of Deferred Tax Assets and Liabilities	The significant components of deferred taxes classified in First Guaranty's Consolidated Balance Sheets at December 31, 2019 and 2018 are as follows: December 31, (in thousands) 2019 2018 Deferred tax assets: Allowance for loan losses $ 1,720 $ 2,159 Other real estate owned 257 28 Unrealized losses on available for sale securities — 1,897 Net operating loss 1,282 1,374 Other 508 456 Gross deferred tax assets 3,767 5,914 Deferred tax liabilities: Depreciation and amortization (2,010 ) (1,537 ) Core deposit intangibles (1,359 ) (552 ) Unrealized gains on available for sale securities (578 ) — Discount on purchased loans (267 ) — Other (670 ) (589 ) Gross deferred tax liabilities (4,884 ) (2,678 ) Net deferred tax (liabilities) assets $ (1,117 ) $ 3,236

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Summary of Notional Amounts of Financial Instruments with Off-Balance Sheet Risk	Set forth below is a summary of the notional amounts of the financial instruments with off-balance sheet risk at December 31, 2019 and December 31, 2018 . Contract Amount December 31, 2019 December 31, 2018 (in thousands) Commitments to Extend Credit $ 117,826 $ 108,348 Unfunded Commitments under lines of credit $ 148,127 $ 122,212 Commercial and Standby letters of credit $ 11,258 $ 6,912

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value, Assets Measured on Recurring Basis	The following table summarizes financial assets measured at fair value on a recurring basis as of December 31, 2019 and 2018 , segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value: (in thousands) December 31, 2019 December 31, 2018 Available for Sale Securities Fair Value Measurements Using: Level 1: Quoted Prices in Active Markets For Identical Assets $ 497 $ 483 Level 2: Significant Other Observable Inputs 330,539 291,733 Level 3: Significant Unobservable Inputs 9,398 4,761 Securities available for sale measured at fair value $ 340,434 $ 296,977
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation	The following table reconciles assets measured at fair value on a recurring basis using unobservable inputs ( Level 3 ): Level 3 Changes (in thousands) December 31, 2019 December 31, 2018 Balance, beginning of year $ 4,761 $ 6,533 Total gains or losses (realized/unrealized): Included in earnings — (15 ) Included in other comprehensive income 146 (79 ) Purchases, sales, issuances and settlements, net 4,491 (1,886 ) Transfers in and/or out of Level 3 — 208 Balance as of end of year $ 9,398 $ 4,761
Fair Value Measurements, Nonrecurring	The following table measures financial assets and financial liabilities measured at fair value on a non-recurring basis as of December 31, 2019 , segregated by the level of valuation inputs within the fair value hierarchy utilized to measure fair value: (in thousands) At December 31, 2019 At December 31, 2018 Fair Value Measurements Using: Impaired Loans Level 1: Quoted Prices in Active Markets For Identical Assets $ — $ — Level 2: Significant Other Observable Inputs — — Level 3: Significant Unobservable Inputs 4,046 3,620 Impaired loans measured at fair value $ 4,046 $ 3,620 Fair Value Measurements Using: Other Real Estate Owned Level 1: Quoted Prices in Active Markets For Identical Assets $ — $ — Level 2: Significant Other Observable Inputs 4,158 1,012 Level 3: Significant Unobservable Inputs 721 126 Other real estate owned measured at fair value $ 4,879 $ 1,138

Financial Instruments (Tables)

Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2019
Financial Instruments, Owned, at Fair Value [Abstract]
Schedule of Estimated Fair Values and Carrying Values of Financial Instruments	The estimated fair values and carrying values of the financial instruments at December 31, 2019 and 2018 are presented in the following table: December 31, 2019 2018 (in thousands) Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value Assets Cash and cash equivalents $ 67,425 $ 67,425 $ 127,965 $ 127,965 Securities, available for sale $ 340,434 $ 340,434 $ 296,977 $ 296,977 Securities, held to maturity $ 86,579 $ 86,817 $ 108,326 $ 104,840 Federal Home Loan Bank stock $ 3,308 $ 3,308 $ 2,393 $ 2,393 Loans held for sale $ — $ — $ 344 $ 379 Loans, net $ 1,514,561 $ 1,515,277 $ 1,214,492 $ 1,193,886 Accrued interest receivable $ 8,412 $ 8,412 $ 6,716 $ 6,716 Liabilities Deposits $ 1,853,013 $ 1,863,179 $ 1,629,622 $ 1,625,827 Borrowings $ 72,010 $ 71,969 $ 19,838 $ 19,853 Junior subordinated debentures $ 14,737 $ 14,762 $ 14,700 $ 14,537 Accrued interest payable $ 6,047 $ 6,047 $ 3,952 $ 3,952

Condensed Parent Company Info_2

Condensed Parent Company Information (Tables)	12 Months Ended
	Dec. 31, 2019
Condensed Financial Information Disclosure [Abstract]
Condensed Balance Sheets	First Guaranty Bancshares, Inc. Condensed Balance Sheets December 31, (in thousands) 2019 2018 Assets Cash $ 633 $ 8,069 Investment in bank subsidiary 224,677 169,880 Other assets 4,427 4,724 Total Assets $ 229,737 $ 182,673 Liabilities and Shareholders' Equity Senior long-term debt 48,558 19,838 Junior subordinated debentures 14,738 14,700 Other liabilities 406 851 Total Liabilities 63,702 35,389 Shareholders' Equity 166,035 147,284 Total Liabilities and Shareholders' Equity $ 229,737 $ 182,673
Condensed Statements of Income	First Guaranty Bancshares, Inc. Condensed Statements of Income December 31, (in thousands) 2019 2018 2017 Operating Income Dividends received from bank subsidiary $ 13,982 $ 11,788 $ 10,622 Net gains on sale of equity securities 196 — 54 Other income 424 289 171 Total operating income 14,602 12,077 10,847 Operating Expenses Interest expense 1,795 1,675 1,518 Salaries & Benefits 208 133 495 Other expenses 953 916 1,147 Total operating expenses 2,956 2,724 3,160 Income before income tax benefit and increase in equity in undistributed earnings of subsidiary 11,646 9,353 7,687 Income tax benefit 494 540 834 Income before increase in equity in undistributed earnings of subsidiary 12,140 9,893 8,521 Increase in equity in undistributed earnings of subsidiary 2,101 4,320 3,230 Net Income $ 14,241 $ 14,213 $ 11,751
Condensed Statements of Cash Flows	First Guaranty Bancshares, Inc. Condensed Statements of Cash Flows December 31, (in thousands) 2019 2018 2017 Cash flows from operating activities: Net income $ 14,241 $ 14,213 $ 11,751 Adjustments to reconcile net income to net cash provided by operating activities: Increase in equity in undistributed earnings of subsidiary (2,101 ) (4,320 ) (3,230 ) Depreciation and amortization 80 43 43 Gain on sale of securities (196 ) — (54 ) Net change in other liabilities (444 ) 136 187 Net change in other assets (601 ) 1,360 (1,306 ) Net cash provided by operating activities 10,979 11,432 7,391 Cash flows from investing activities: Proceeds from maturities, calls and sales of AFS securities — — 134 Proceeds from sales of equity securities 1,196 — — Funds invested in bank subsidiary — — (3,750 ) Purchases of premises and equipment (136 ) — — Cash paid in acquisition (43,383 ) — (10,108 ) Net cash used in investing activities (42,323 ) — (13,724 ) Cash flows from financing activities: Proceeds from long-term debt, net of costs 32,465 — 3,750 Repayment of long-term debt (3,754 ) (2,941 ) (3,081 ) Proceeds from junior subordinated debentures, net of costs — — — Common stock issued in private placement 1,000 — — Dividends paid (5,803 ) (5,636 ) (5,210 ) Net cash provided by (used in) financing activities 23,908 (8,577 ) (4,541 ) Net (decrease) increase in cash and cash equivalents (7,436 ) 2,855 (10,874 ) Cash and cash equivalents at the beginning of the period 8,069 5,214 16,088 Cash and cash equivalents at the end of the period $ 633 $ 8,069 $ 5,214

Business and Summary of Signi_3

Business and Summary of Significant Accounting Policies (Details)	Dec. 16, 2019	Dec. 31, 2019USD ($)	Dec. 31, 2019USD ($)ATMfacilitysegmentofficepayment
Accounting Policies [Abstract]
Number of banking offices | office			34
Number of drive up banking facility | facility			1
Number of automated teller machines (ATMs) | ATM			48
Acquisition Accounting [Abstract]
Maximum period of fair value refinement after closing date of acquisition			1 year
Loans [Abstract]
Past due period after which evaluation is made for discontinuation of interest accrual on loan			90 days
Period of payment performance after which loans are returned to accrual status			6 months
Troubled Debt Restructurings (TDRs) [Abstract]
Period of performance, after which the Company evaluates TDRs that have subsequently been restructured and returned to market terms			6 months
Credit Quality [Abstract]
Minimum balance of impaired loans over which impairment method is applied | $		$ 500,000	$ 500,000
Earnings per common share [Abstract]
Common stock, dividend paid percentage	10.00%	10.00%
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Number of reportable operating segments | segment			1
Minimum
Loans [Abstract]
Threshold period past due for charge-off of loans		90 days	90 days
Maximum
Loans [Abstract]
Threshold period past due for charge-off of loans		120 days	120 days
Single-Family Residential | Fixed Rate Residential Mortgage
Loans Receivable Held-for-sale [Abstract]
Period within which loans are sold in secondary market			30 days
All Loans Except Mortgage Loans
Loans [Abstract]
Past due period after which loans are considered past due			30 days
Mortgage Loans
Loans [Abstract]
Number of consecutive payments missed after which loans are considered past due | payment			2
Building and Building Improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life			10 years
Building and Building Improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life			40 years
Equipment, Fixtures and Automobiles | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life			3 years
Equipment, Fixtures and Automobiles | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life			10 years
Core Deposits | Minimum
Finite-Lived Intangible Assets [Line Items]
Amortization period			7 years
Core Deposits | Maximum
Finite-Lived Intangible Assets [Line Items]
Amortization period			15 years
Consumer Portfolio Segment
Credit Quality [Abstract]
Period past due after which loans are considered substandard			90 days

Recent Accounting Pronounceme_2

Recent Accounting Pronouncements (Details) - ASU 2016-02 $ in Millions	Jan. 01, 2019USD ($)
Change in Accounting Estimate [Line Items]
Operating lease right-of-use assets	$ 0.9
Operating lease liabilities	$ 0.9

Merger Transaction (Details)

Merger Transaction (Details) - USD ($) $ in Thousands	Nov. 07, 2019	Dec. 31, 2019	Jul. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Goodwill		$ 12,942		$ 3,472
Premier Bancshares, Inc.
Business Acquisition [Line Items]
Percentage of outstanding shares acquired	100.00%
Acquisition value paid in cash	$ 43,400
Goodwill	9,469		$ 9,500
Intangible assets	4,213
Fair value of loans acquired	176,900
Contractual amounts receivable	174,200
Contractual expected cash flow	$ 1,200
Premier Bancshares, Inc. | Core Deposits
Business Acquisition [Line Items]
Intangible assets			$ 4,200

Merger Transaction - Fair Value

Merger Transaction - Fair Value of Assets and Liabilities Assumed (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Nov. 07, 2019	Jul. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Goodwill	$ 12,942			$ 3,472
Premier Bancshares, Inc.
Business Acquisition [Line Items]
Cash and due from banks		$ 20,058
Securities available for sale		38,813
Loans		184,165
Premises and equipment		7,223
Goodwill		9,469	$ 9,500
Intangible assets		4,213
Other real estate		1,595
Other assets		9,303
Total assets acquired		274,839
Deposits		204,983
FHLB borrowings		16,617
Repurchase agreements		6,863
Other liabilities		2,993
Total liabilities assumed		231,456
Net assets acquired		$ 43,383

Merger Transaction - Pro Forma

Merger Transaction - Pro Forma information (Details) - Premier Bancshares, Inc. - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Net Interest Income	$ 70,105	$ 67,194
Noninterest Income	9,877	7,075
Noninterest Expense	54,482	51,261
Net Income	$ 16,459	$ 17,259
Earnings per common share (in dollars per share)	$ 1.70	$ 1.78

Cash and Due from Banks (Detail

Cash and Due from Banks (Details)	Dec. 31, 2019USD ($)account	Dec. 31, 2018USD ($)account
Cash and Cash Equivalents [Abstract]
Reserve maintained at Federal Reserve Bank	$ 0	$ 0
Number of accounts that exceeded FDIC insurable limit | account	2	1
Balance in excess of FDIC insurable limit	$ 5,700,000	$ 127,000

Securities - Summary Comparison

Securities - Summary Comparison of Securities by Type (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Available for sale:
Amortized cost	$ 337,681	$ 306,012
Gross unrealized gains	3,352	1,192
Gross unrealized losses	(599)	(10,227)
Fair value	340,434	296,977
Held to maturity:
Amortized cost	86,579	108,326
Gross unrealized gains	382	0
Gross unrealized losses	(144)	(3,486)
Fair value	86,817	104,840
U.S. Treasuries
Available for sale:
Amortized cost	0	0
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Fair value	0	0
U.S. Government Agencies
Available for sale:
Amortized cost	16,380	146,911
Gross unrealized gains	15	0
Gross unrealized losses	(2)	(5,522)
Fair value	16,393	141,389
Corporate debt securities
Available for sale:
Amortized cost	94,561	76,310
Gross unrealized gains	1,110	72
Gross unrealized losses	(302)	(3,504)
Fair value	95,369	72,878
Other securities
Available for sale:
Amortized cost	497	483
Gross unrealized gains	0	0
Gross unrealized losses	0	0
Fair value	497	483
Municipal bonds
Available for sale:
Amortized cost	30,297	32,956
Gross unrealized gains	1,870	1,120
Gross unrealized losses	(14)	(175)
Fair value	32,153	33,901
Held to maturity:
Amortized cost	5,107	5,227
Gross unrealized gains	182	0
Gross unrealized losses	0	(101)
Fair value	5,289	5,126
Collateralized mortgage obligations
Available for sale:
Amortized cost	16,400	918
Gross unrealized gains	40	0
Gross unrealized losses	(43)	(14)
Fair value	16,397	904
Mortgage-backed securities
Available for sale:
Amortized cost	179,546	48,434
Gross unrealized gains	317	0
Gross unrealized losses	(238)	(1,012)
Fair value	179,625	47,422
Held to maturity:
Amortized cost	63,297	74,927
Gross unrealized gains	200	0
Gross unrealized losses	(112)	(2,304)
Fair value	63,385	72,623
U.S. Government Agencies
Held to maturity:
Amortized cost	18,175	28,172
Gross unrealized gains	0	0
Gross unrealized losses	(32)	(1,081)
Fair value	$ 18,143	$ 27,091

Securities - Scheduled Maturiti

Securities - Scheduled Maturities of Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Amortized Cost
Due in one year or less	$ 4,499
Due after one year through five years	38,029
Due after five years through 10 years	76,584
Over 10 years	22,623
Subtotal	141,735
Amortized cost	337,681	$ 306,012
Fair Value
Due in one year or less	4,520
Due after one year through five years	38,729
Due after five years through 10 years	77,943
Over 10 years	23,220
Subtotal	144,412
Fair value	340,434	296,977
Amortized Cost
Due in one year or less	5,050
Due after one year through five years	7,327
Due after five years through 10 years	7,496
Over 10 years	3,409
Subtotal	23,282
Mortgage-backed Securities	63,297
Amortized cost	86,579	108,326
Fair Value
Due in one year or less	5,047
Due after one year through five years	7,318
Due after five years through 10 years	7,543
Over 10 years	3,524
Subtotal	23,432
Mortgage-backed Securities	63,385
Fair value	86,817	104,840
Collateralized mortgage obligations
Amortized Cost
Without single maturity date	16,400
Amortized cost	16,400	918
Fair Value
Without single maturity date	16,397
Fair value	16,397	904
Mortgage-backed securities
Amortized Cost
Without single maturity date	179,546
Amortized cost	179,546	48,434
Fair Value
Without single maturity date	179,625
Fair value	179,625	47,422
Amortized Cost
Amortized cost	63,297	74,927
Fair Value
Fair value	$ 63,385	$ 72,623

Securities - Summary of Securit

Securities - Summary of Securities in Continuous Unrealized Loss Position (Details) $ in Thousands	Dec. 31, 2019USD ($)security	Dec. 31, 2018USD ($)security
Available for sale:
Less Than 12 Months, Number of Securities | security	121	55
Less Than 12 Months, Fair Value	$ 131,727	$ 33,355
Less Than 12 Months, Gross Unrealized Losses	$ (418)	$ (598)
12 Months or More, Number of Securities | security	22	295
12 Months or More, Fair Value	$ 15,454	$ 233,348
12 Months or More, Gross Unrealized Losses	$ (181)	$ (9,629)
Total, Number of Securities | security	143	350
Total, Fair Value	$ 147,181	$ 266,703
Total, Gross Unrealized Losses	$ (599)	$ (10,227)
Held to maturity:
Less Than 12 Months, Number of Securities | security	9	0
Less Than 12 Months, Fair Value	$ 11,057	$ 0
Less Than 12 Months, Gross Unrealized Losses	$ (60)	$ 0
12 Months or More, Number of Securities | security	(19)	(79)
12 Months or More, Fair Value	$ 27,358	$ 104,840
12 Months or More, Gross Unrealized Losses	$ (84)	$ (3,486)
Total, Number of Securities | security	28	79
Total, Fair Value	$ 38,415	$ 104,840
Total, Gross Unrealized Losses	$ (144)	$ (3,486)
U.S. Treasuries
Available for sale:
Less Than 12 Months, Number of Securities | security	0	0
Less Than 12 Months, Fair Value	$ 0	$ 0
Less Than 12 Months, Gross Unrealized Losses	$ 0	$ 0
12 Months or More, Number of Securities | security	0	0
12 Months or More, Fair Value	$ 0	$ 0
12 Months or More, Gross Unrealized Losses	$ 0	$ 0
Total, Number of Securities | security	0	0
Total, Fair Value	$ 0	$ 0
Total, Gross Unrealized Losses	$ 0	$ 0
U.S. Government Agencies
Available for sale:
Less Than 12 Months, Number of Securities | security	1	1
Less Than 12 Months, Fair Value	$ 4,398	$ 4,227
Less Than 12 Months, Gross Unrealized Losses	$ (1)	$ (273)
12 Months or More, Number of Securities | security	1	50
12 Months or More, Fair Value	$ 149	$ 137,162
12 Months or More, Gross Unrealized Losses	$ (1)	$ (5,249)
Total, Number of Securities | security	2	51
Total, Fair Value	$ 4,547	$ 141,389
Total, Gross Unrealized Losses	$ (2)	$ (5,522)
Corporate debt securities
Available for sale:
Less Than 12 Months, Number of Securities | security	42	37
Less Than 12 Months, Fair Value	$ 21,269	$ 9,560
Less Than 12 Months, Gross Unrealized Losses	$ (174)	$ (252)
12 Months or More, Number of Securities | security	12	183
12 Months or More, Fair Value	$ 3,184	$ 58,877
12 Months or More, Gross Unrealized Losses	$ (128)	$ (3,252)
Total, Number of Securities | security	54	220
Total, Fair Value	$ 24,453	$ 68,437
Total, Gross Unrealized Losses	$ (302)	$ (3,504)
Other securities
Available for sale:
Less Than 12 Months, Number of Securities | security	0	0
Less Than 12 Months, Fair Value	$ 0	$ 0
Less Than 12 Months, Gross Unrealized Losses	$ 0	$ 0
12 Months or More, Number of Securities | security	0	0
12 Months or More, Fair Value	$ 0	$ 0
12 Months or More, Gross Unrealized Losses	$ 0	$ 0
Total, Number of Securities | security	0	0
Total, Fair Value	$ 0	$ 0
Total, Gross Unrealized Losses	$ 0	$ 0
Municipal bonds
Available for sale:
Less Than 12 Months, Number of Securities | security	9	1
Less Than 12 Months, Fair Value	$ 4,285	$ 115
Less Than 12 Months, Gross Unrealized Losses	$ (14)	$ 0
12 Months or More, Number of Securities | security	0	19
12 Months or More, Fair Value	$ 0	$ 8,436
12 Months or More, Gross Unrealized Losses	$ 0	$ (175)
Total, Number of Securities | security	9	20
Total, Fair Value	$ 4,285	$ 8,551
Total, Gross Unrealized Losses	$ (14)	$ (175)
Held to maturity:
Less Than 12 Months, Number of Securities | security	0	0
Less Than 12 Months, Fair Value	$ 0	$ 0
Less Than 12 Months, Gross Unrealized Losses	$ 0	$ 0
12 Months or More, Number of Securities | security	(1)	(9)
12 Months or More, Fair Value	$ 50	$ 5,126
12 Months or More, Gross Unrealized Losses	$ 0	$ (101)
Total, Number of Securities | security	1	9
Total, Fair Value	$ 50	$ 5,126
Total, Gross Unrealized Losses	$ 0	$ (101)
Collateralized mortgage obligations
Available for sale:
Less Than 12 Months, Number of Securities | security	12	0
Less Than 12 Months, Fair Value	$ 10,022	$ 0
Less Than 12 Months, Gross Unrealized Losses	$ (43)	$ 0
12 Months or More, Number of Securities | security	0	5
12 Months or More, Fair Value	$ 0	$ 904
12 Months or More, Gross Unrealized Losses	$ 0	$ (14)
Total, Number of Securities | security	12	5
Total, Fair Value	$ 10,022	$ 904
Total, Gross Unrealized Losses	$ (43)	$ (14)
Mortgage-backed securities
Available for sale:
Less Than 12 Months, Number of Securities | security	57	16
Less Than 12 Months, Fair Value	$ 91,753	$ 19,453
Less Than 12 Months, Gross Unrealized Losses	$ (186)	$ (73)
12 Months or More, Number of Securities | security	9	38
12 Months or More, Fair Value	$ 12,121	$ 27,969
12 Months or More, Gross Unrealized Losses	$ (52)	$ (939)
Total, Number of Securities | security	66	54
Total, Fair Value	$ 103,874	$ 47,422
Total, Gross Unrealized Losses	$ (238)	$ (1,012)
Held to maturity:
Less Than 12 Months, Number of Securities | security	7	0
Less Than 12 Months, Fair Value	$ 8,880	$ 0
Less Than 12 Months, Gross Unrealized Losses	$ (58)	$ 0
12 Months or More, Number of Securities | security	(10)	(56)
12 Months or More, Fair Value	$ 11,343	$ 72,623
12 Months or More, Gross Unrealized Losses	$ (54)	$ (2,304)
Total, Number of Securities | security	17	56
Total, Fair Value	$ 20,223	$ 72,623
Total, Gross Unrealized Losses	$ (112)	$ (2,304)
U.S. Government Agencies
Held to maturity:
Less Than 12 Months, Number of Securities | security	2	0
Less Than 12 Months, Fair Value	$ 2,177	$ 0
Less Than 12 Months, Gross Unrealized Losses	$ (2)	$ 0
12 Months or More, Number of Securities | security	(8)	(14)
12 Months or More, Fair Value	$ 15,965	$ 27,091
12 Months or More, Gross Unrealized Losses	$ (30)	$ (1,081)
Total, Number of Securities | security	10	14
Total, Fair Value	$ 18,142	$ 27,091
Total, Gross Unrealized Losses	$ (32)	$ (1,081)

Securities - Narrative (Details

Securities - Narrative (Details)	12 Months Ended
	Dec. 31, 2019USD ($)security	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Investments, Debt and Equity Securities [Abstract]
Number of debt securities with unrealized losses | security	171
Unrealized losses on debt securities in continuous loss position as percentage of total individual securities' amortized cost basis	0.40%
Unrealized losses on debt securities in continuous loss position as percentage of amortized cost basis of investment securities portfolio	0.20%
Number of debt securities in continuous loss position for over 12 months | security	41
Debt securities in a continuous loss position for over 12 months, amortized cost basis	$ 43,100,000
Debt securities in a continuous loss position for over 12 months, unrealized loss	300,000
Oter than temporary impairment loss, portion recognized in earnings	0	$ 0	$ 0
Other-than-temporary impairment credit losses on securities not previously OTTI	0
Carrying value of pledged securities	212,800,000	289,700,000
Gross realized gains	800,000	100,000	1,400,000
Gross realized losses	1,100,000	1,900,000	100,000
Tax (benefit) provision applicable to these realized net (losses)/gains	(79,000)	(400,000)	500,000
Proceeds from sales of securities	90,500,000	114,500,000	$ 148,000,000
Net unrealized gains (losses) on available-for-sale securities included in AOCI , net of applicable income taxes	2,200,000	(7,100,000)
Losses reclassified out of AOCI into earnings, net of tax	$ 300,000	$ (1,400,000)

Securities - Other Than Tempora

Securities - Other Than Temporary Impairments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Beginning balance of credit losses at beginning of year	$ 60	$ 60	$ 60
Other-than-temporary impairment credit losses on securities not previously OTTI	0	0	0
Increases for additional credit losses on securities previously determined to be OTTI	0	0	0
Reduction for increases in cash flows	0	0	0
Reduction due to credit impaired securities sold or fully settled	(60)	0	0
Ending balance of cumulative credit losses recognized in earnings at end of year	$ 0	$ 60	$ 60

Securities - Exposure to Invest

Securities - Exposure to Investment Securities Issuers That Exceeded 10 Percent of Stockholders' Equity (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Concentration Risk [Line Items]
Amortized Cost	$ 427,013	$ 405,303
Stockholders' Equity, Total
Concentration Risk [Line Items]
Amortized Cost	261,895
Fair Value	262,005
Stockholders' Equity, Total | Federal Home Loan Mortgage Corporation (Freddie Mac-FHLMC)
Concentration Risk [Line Items]
Amortized Cost	96,966
Fair Value	97,036
Stockholders' Equity, Total | Federal National Mortgage Association (Fannie Mae-FNMA)
Concentration Risk [Line Items]
Amortized Cost	146,702
Fair Value	146,758
Stockholders' Equity, Total | Federal Farm Credit Bank (FFCB)
Concentration Risk [Line Items]
Amortized Cost	18,227
Fair Value	$ 18,211

Loans - Components of Loan Port

Loans - Components of Loan Portfolio (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Balance
Total Loans Before Unearned Income	$ 1,528,966	$ 1,228,414
Unearned income	(3,476)	(3,146)
Total Loans Net of Unearned Income	$ 1,525,490	$ 1,225,268
As % of Category
Percent of category	100.00%	100.00%
Real Estate
Balance
Total Loans Before Unearned Income	$ 1,125,132	$ 944,986
As % of Category
Percent of category	73.60%	76.90%
Real Estate | Construction & land development
Balance
Total Loans Before Unearned Income	$ 172,247	$ 124,644
As % of Category
Percent of category	11.30%	10.10%
Real Estate | Farmland
Balance
Total Loans Before Unearned Income	$ 22,741	$ 18,401
As % of Category
Percent of category	1.50%	1.50%
Real Estate | 1- 4 Family
Balance
Total Loans Before Unearned Income	$ 289,635	$ 172,760
As % of Category
Percent of category	18.90%	14.10%
Real Estate | Multifamily
Balance
Total Loans Before Unearned Income	$ 23,973	$ 42,918
As % of Category
Percent of category	1.60%	3.50%
Real Estate | Non-farm non-residential
Balance
Total Loans Before Unearned Income	$ 616,536	$ 586,263
As % of Category
Percent of category	40.30%	47.70%
Non-Real Estate
Balance
Total Loans Before Unearned Income	$ 403,834	$ 283,428
As % of Category
Percent of category	26.40%	23.10%
Non-Real Estate | Agricultural
Balance
Total Loans Before Unearned Income	$ 26,710	$ 23,108
As % of Category
Percent of category	1.80%	1.90%
Non-Real Estate | Commercial and industrial
Balance
Total Loans Before Unearned Income	$ 268,256	$ 200,877
As % of Category
Percent of category	17.50%	16.40%
Non-Real Estate | Consumer and other
Balance
Total Loans Before Unearned Income	$ 108,868	$ 59,443
As % of Category
Percent of category	7.10%	4.80%

Loans - Fixed and Floating Rate

Loans - Fixed and Floating Rate Loans by Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Financing Receivables, Fixed and Floating Rate Loans by Contractual Maturity [Abstract]
One year or less	$ 310,455	$ 189,055
One to five years	795,586	681,081
Five to 15 years	213,215	205,494
Over 15 years	195,307	144,041
Subtotal	1,514,563	1,219,671
Nonaccrual loans	14,403	8,743
Total Loans before Unearned Income	1,528,966	1,228,414
Unearned income	(3,476)	(3,146)
Total Loans Net of Unearned Income	1,525,490	1,225,268
Fixed
Financing Receivables, Fixed and Floating Rate Loans by Contractual Maturity [Abstract]
One year or less	205,596	108,160
One to five years	509,455	393,344
Five to 15 years	147,502	118,715
Over 15 years	143,695	85,611
Subtotal	1,006,248	705,830
Floating
Financing Receivables, Fixed and Floating Rate Loans by Contractual Maturity [Abstract]
One year or less	104,859	80,895
One to five years	286,131	287,737
Five to 15 years	65,713	86,779
Over 15 years	51,612	58,430
Subtotal	508,315	513,841
Loans at interest rate floor	$ 153,300	$ 27,700

Loans - Receivables Past Due (D

Loans - Receivables Past Due (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	$ 41,513	$ 21,509
Current	1,487,453	1,206,905
Total Loans before Unearned Income	1,528,966	1,228,414
Recorded Investment 90 Days Accruing	2,639	145	$ 800
Unearned income	(3,476)	(3,146)
Total Loans Net of Unearned Income	1,525,490	1,225,268
30-89 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	24,471	12,621
90 Days or Greater Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	17,042	8,888
Real Estate
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	32,200	15,554
Current	1,092,932	929,432
Total Loans before Unearned Income	1,125,132	944,986
Recorded Investment 90 Days Accruing	2,574	26
Real Estate | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	20,566	10,814
Real Estate | 90 Days or Greater Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	11,634	4,740
Real Estate | Construction & land development
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1,189	1,247
Current	171,058	123,397
Total Loans before Unearned Income	172,247	124,644
Recorded Investment 90 Days Accruing	48	0
Real Estate | Construction & land development | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	760	936
Real Estate | Construction & land development | 90 Days or Greater Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	429	311
Real Estate | Farmland
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1,280	1,293
Current	21,461	17,108
Total Loans before Unearned Income	22,741	18,401
Recorded Investment 90 Days Accruing	0	0
Real Estate | Farmland | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	6	0
Real Estate | Farmland | 90 Days or Greater Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1,274	1,293
Real Estate | 1- 4 Family
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	12,203	6,605
Current	277,432	166,155
Total Loans before Unearned Income	289,635	172,760
Recorded Investment 90 Days Accruing	923	26
Real Estate | 1- 4 Family | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	8,521	4,333
Real Estate | 1- 4 Family | 90 Days or Greater Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	3,682	2,272
Real Estate | Multifamily
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	648
Current	23,973	42,270
Total Loans before Unearned Income	23,973	42,918
Recorded Investment 90 Days Accruing	0	0
Real Estate | Multifamily | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	648
Real Estate | Multifamily | 90 Days or Greater Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Real Estate | Non-farm non-residential
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	17,528	5,761
Current	599,008	580,502
Total Loans before Unearned Income	616,536	586,263
Recorded Investment 90 Days Accruing	1,603	0
Real Estate | Non-farm non-residential | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	11,279	4,897
Real Estate | Non-farm non-residential | 90 Days or Greater Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	6,249	864
Non-Real Estate
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	9,313	5,955
Current	394,521	277,473
Total Loans before Unearned Income	403,834	283,428
Recorded Investment 90 Days Accruing	65	119
Non-Real Estate | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	3,905	1,807
Non-Real Estate | 90 Days or Greater Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	5,408	4,148
Non-Real Estate | Agricultural
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	5,110	4,179
Current	21,600	18,929
Total Loans before Unearned Income	26,710	23,108
Recorded Investment 90 Days Accruing	0	0
Non-Real Estate | Agricultural | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	310	528
Non-Real Estate | Agricultural | 90 Days or Greater Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	4,800	3,651
Non-Real Estate | Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	3,143	1,112
Current	265,113	199,765
Total Loans before Unearned Income	268,256	200,877
Recorded Investment 90 Days Accruing	15	53
Non-Real Estate | Commercial and industrial | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	2,801	742
Non-Real Estate | Commercial and industrial | 90 Days or Greater Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	342	370
Non-Real Estate | Consumer and other
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1,060	664
Current	107,808	58,779
Total Loans before Unearned Income	108,868	59,443
Recorded Investment 90 Days Accruing	50	66
Non-Real Estate | Consumer and other | 30-89 Days Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	794	537
Non-Real Estate | Consumer and other | 90 Days or Greater Past Due
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	$ 266	$ 127

Loans - Nonaccrual Loans (Detai

Loans - Nonaccrual Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	$ 14,403	$ 8,743
Real Estate
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	9,060	4,714
Real Estate | Construction & land development
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	381	311
Real Estate | Farmland
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	1,274	1,293
Real Estate | 1- 4 Family
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	2,759	2,246
Real Estate | Multifamily
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	0	0
Real Estate | Non-farm non-residential
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	4,646	864
Non-Real Estate
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	5,343	4,029
Non-Real Estate | Agricultural
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	4,800	3,651
Non-Real Estate | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	327	317
Non-Real Estate | Consumer and other
Financing Receivable, Past Due [Line Items]
Nonaccrual loans	$ 216	$ 61

Loans - Credit Exposure of Port

Loans - Credit Exposure of Portfolio (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	$ 1,528,966	$ 1,228,414
Unearned income	(3,476)	(3,146)
Total Loans Net of Unearned Income	1,525,490	1,225,268
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	1,451,811	1,154,686
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	24,083	26,413
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	53,072	46,792
Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	0	523
Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	1,125,132	944,986
Real Estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	1,059,248	890,341
Real Estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	22,656	15,289
Real Estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	43,228	38,833
Real Estate | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	0	523
Real Estate | Construction & land development
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	172,247	124,644
Real Estate | Construction & land development | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	163,808	116,062
Real Estate | Construction & land development | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	6,180	5,698
Real Estate | Construction & land development | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	2,259	2,884
Real Estate | Construction & land development | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	0	0
Real Estate | Farmland
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	22,741	18,401
Real Estate | Farmland | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	18,223	13,151
Real Estate | Farmland | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	3,177	3,888
Real Estate | Farmland | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	1,341	1,362
Real Estate | Farmland | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	0	0
Real Estate | 1- 4 Family
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	289,635	172,760
Real Estate | 1- 4 Family | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	271,392	160,581
Real Estate | 1- 4 Family | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	4,751	2,815
Real Estate | 1- 4 Family | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	13,492	9,364
Real Estate | 1- 4 Family | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	0	0
Real Estate | Multifamily
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	23,973	42,918
Real Estate | Multifamily | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	16,025	35,554
Real Estate | Multifamily | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	805	0
Real Estate | Multifamily | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	7,143	7,364
Real Estate | Multifamily | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	0	0
Real Estate | Non-farm non-residential
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	616,536	586,263
Real Estate | Non-farm non-residential | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	589,800	564,993
Real Estate | Non-farm non-residential | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	7,743	2,888
Real Estate | Non-farm non-residential | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	18,993	17,859
Real Estate | Non-farm non-residential | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	0	523
Non-Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	403,834	283,428
Non-Real Estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	392,563	264,345
Non-Real Estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	1,427	11,124
Non-Real Estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	9,844	7,959
Non-Real Estate | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	0	0
Non-Real Estate | Agricultural
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	26,710	23,108
Non-Real Estate | Agricultural | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	21,529	19,050
Non-Real Estate | Agricultural | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	48	43
Non-Real Estate | Agricultural | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	5,133	4,015
Non-Real Estate | Agricultural | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	0	0
Non-Real Estate | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	268,256	200,877
Non-Real Estate | Commercial and industrial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	262,416	186,176
Non-Real Estate | Commercial and industrial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	1,199	10,930
Non-Real Estate | Commercial and industrial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	4,641	3,771
Non-Real Estate | Commercial and industrial | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	0	0
Non-Real Estate | Consumer and other
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	108,868	59,443
Non-Real Estate | Consumer and other | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	108,618	59,119
Non-Real Estate | Consumer and other | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	180	151
Non-Real Estate | Consumer and other | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	70	173
Non-Real Estate | Consumer and other | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Total Loans Before Unearned Income	$ 0	$ 0

Loans - Purchased Impaired Loan

Loans - Purchased Impaired Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Nov. 07, 2019
Financing Receivable, Impaired [Line Items]
Carrying amount	$ 10,420	$ 3,259
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance, beginning of period	613	1,031
Acquisition accretable yield	3,367	0
Accretion	(831)	(418)
Net transfers from nonaccretable difference to accretable yield	498	0
Balance, end of period	3,647	613
Premier Bancshares, Inc.
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Contractually require payments of purchased impaired loans			$ 13,700
Cash flow expected to be colleted at acquisition			10,600
Fair value of loans acquired			$ 7,300
Real Estate
Financing Receivable, Impaired [Line Items]
Carrying amount	9,222	2,350
Real Estate | Construction & land development
Financing Receivable, Impaired [Line Items]
Carrying amount	526	0
Real Estate | Farmland
Financing Receivable, Impaired [Line Items]
Carrying amount	0	1
Real Estate | 1- 4 Family
Financing Receivable, Impaired [Line Items]
Carrying amount	6,402	48
Real Estate | Multifamily
Financing Receivable, Impaired [Line Items]
Carrying amount	0	0
Real Estate | Non-farm non-residential
Financing Receivable, Impaired [Line Items]
Carrying amount	2,294	2,301
Non-Real Estate
Financing Receivable, Impaired [Line Items]
Carrying amount	1,198	909
Non-Real Estate | Agricultural
Financing Receivable, Impaired [Line Items]
Carrying amount	0	0
Non-Real Estate | Commercial and industrial
Financing Receivable, Impaired [Line Items]
Carrying amount	1,198	909
Non-Real Estate | Consumer and other
Financing Receivable, Impaired [Line Items]
Carrying amount	$ 0	$ 0

Allowance for Loan Losses - Sum

Allowance for Loan Losses - Summary of Changes in Allowance for Loan Losses, by Portfolio Type (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Allowance for Credit Loss [Line Items]
Total TDRs	$ 0	$ 1,592,000
Summary of changes in allowance for loan losses, by portfolio type [Roll Forward]
Beginning allowance	10,776,000	9,225,000	$ 11,114,000
Charge-offs	(5,264,000)	(1,889,000)	(6,362,000)
Recoveries	557,000	2,086,000	651,000
Provision for loan losses	4,860,000	1,354,000	3,822,000
Ending allowance	10,929,000	10,776,000	9,225,000
Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total TDRs	0	1,592,000
Summary of changes in allowance for loan losses, by portfolio type [Roll Forward]
Beginning allowance	7,622,000	5,516,000	6,497,000
Charge-offs	(3,155,000)	(503,000)	(1,324,000)
Recoveries	44,000	202,000	260,000
Provision for loan losses	3,304,000	2,407,000	83,000
Ending allowance	7,815,000	7,622,000	5,516,000
Real Estate | Construction & land development
Financing Receivable, Allowance for Credit Loss [Line Items]
Total TDRs	0	304,000
Summary of changes in allowance for loan losses, by portfolio type [Roll Forward]
Beginning allowance	581,000	628,000	1,232,000
Charge-offs	0	0	0
Recoveries	0	3,000	43,000
Provision for loan losses	(158,000)	(50,000)	(647,000)
Ending allowance	423,000	581,000	628,000
Real Estate | Farmland
Financing Receivable, Allowance for Credit Loss [Line Items]
Total TDRs	0	0
Summary of changes in allowance for loan losses, by portfolio type [Roll Forward]
Beginning allowance	41,000	5,000	19,000
Charge-offs	0	0	0
Recoveries	0	0	0
Provision for loan losses	9,000	36,000	(14,000)
Ending allowance	50,000	41,000	5,000
Real Estate | 1- 4 Family
Financing Receivable, Allowance for Credit Loss [Line Items]
Total TDRs	0	0
Summary of changes in allowance for loan losses, by portfolio type [Roll Forward]
Beginning allowance	911,000	1,078,000	1,204,000
Charge-offs	(552,000)	(99,000)	(33,000)
Recoveries	39,000	90,000	92,000
Provision for loan losses	629,000	(158,000)	(185,000)
Ending allowance	1,027,000	911,000	1,078,000
Real Estate | Multifamily
Financing Receivable, Allowance for Credit Loss [Line Items]
Total TDRs	0	0
Summary of changes in allowance for loan losses, by portfolio type [Roll Forward]
Beginning allowance	1,318,000	994,000	591,000
Charge-offs	0	0	0
Recoveries	0	20,000	40,000
Provision for loan losses	(280,000)	304,000	363,000
Ending allowance	1,038,000	1,318,000	994,000
Real Estate | Non-farm non-residential
Financing Receivable, Allowance for Credit Loss [Line Items]
Total TDRs	0	1,288,000
Summary of changes in allowance for loan losses, by portfolio type [Roll Forward]
Beginning allowance	4,771,000	2,811,000	3,451,000
Charge-offs	(2,603,000)	(404,000)	(1,291,000)
Recoveries	5,000	89,000	85,000
Provision for loan losses	3,104,000	2,275,000	566,000
Ending allowance	5,277,000	4,771,000	2,811,000
Non-Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Total TDRs	0	0
Summary of changes in allowance for loan losses, by portfolio type [Roll Forward]
Beginning allowance	3,154,000	3,709,000	4,617,000
Charge-offs	(2,109,000)	(1,386,000)	(5,038,000)
Recoveries	513,000	1,884,000	391,000
Provision for loan losses	1,556,000	(1,053,000)	3,739,000
Ending allowance	3,114,000	3,154,000	3,709,000
Non-Real Estate | Agricultural
Financing Receivable, Allowance for Credit Loss [Line Items]
Total TDRs	0	0
Summary of changes in allowance for loan losses, by portfolio type [Roll Forward]
Beginning allowance	339,000	187,000	74,000
Charge-offs	(40,000)	(300,000)	(162,000)
Recoveries	0	26,000	138,000
Provision for loan losses	(204,000)	426,000	137,000
Ending allowance	95,000	339,000	187,000
Non-Real Estate | Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Total TDRs	0	0
Summary of changes in allowance for loan losses, by portfolio type [Roll Forward]
Beginning allowance	1,909,000	2,377,000	3,543,000
Charge-offs	(879,000)	(179,000)	(3,629,000)
Recoveries	267,000	1,642,000	30,000
Provision for loan losses	612,000	(1,931,000)	2,433,000
Ending allowance	1,909,000	1,909,000	2,377,000
Non-Real Estate | Consumer and other
Financing Receivable, Allowance for Credit Loss [Line Items]
Total TDRs	0	0
Summary of changes in allowance for loan losses, by portfolio type [Roll Forward]
Beginning allowance	891,000	1,125,000	972,000
Charge-offs	(1,190,000)	(907,000)	(1,247,000)
Recoveries	246,000	216,000	223,000
Provision for loan losses	1,163,000	457,000	1,177,000
Ending allowance	1,110,000	891,000	1,125,000
Non-Real Estate | Unallocated
Summary of changes in allowance for loan losses, by portfolio type [Roll Forward]
Beginning allowance	15,000	20,000	28,000
Charge-offs	0	0	0
Recoveries	0	0	0
Provision for loan losses	(15,000)	(5,000)	(8,000)
Ending allowance	$ 0	$ 15,000	$ 20,000

Allowance for Loan Losses - S_2

Allowance for Loan Losses - Summary of Allowance and Loans Individually and Collectively Evaluated for Impairment (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Summary of allowance and loans individually and collectively evaluated for impairment [Abstract]
Allowance Individually Evaluated for Impairment	$ 2,024	$ 1,300
Allowance Individually Evaluated for Purchased Credit-Impairment	0	0
Allowance Collectively Evaluated for Impairment	8,905	9,476
Total Allowance for Credit Losses	10,929	10,776	$ 9,225	$ 11,114
Loans Individually Evaluated for Impairment	20,732	10,439
Loans Individually Evaluated for Purchased Credit-Impairment	10,420	3,259
Loans Collectively Evaluated for Impairment	1,497,814	1,214,716
Total Loans before Unearned Income	1,528,966	1,228,414
Unearned income	(3,476)	(3,146)
Total Loans Net of Unearned Income	1,525,490	1,225,268
Financing receivable recorded investment not accruing interest	14,400	8,700	12,600
Financing receivable, recorded investment, 90 days past due and still accruing	2,639	145	800
Financing receivable average recorded investment nonaccrual status	12,000	8,900	17,300
Real Estate
Summary of allowance and loans individually and collectively evaluated for impairment [Abstract]
Allowance Individually Evaluated for Impairment	1,913	1,190
Allowance Individually Evaluated for Purchased Credit-Impairment	0	0
Allowance Collectively Evaluated for Impairment	5,902	6,432
Total Allowance for Credit Losses	7,815	7,622	5,516	6,497
Loans Individually Evaluated for Impairment	13,721	6,368
Loans Individually Evaluated for Purchased Credit-Impairment	9,222	2,350
Loans Collectively Evaluated for Impairment	1,102,189	936,268
Total Loans before Unearned Income	1,125,132	944,986
Financing receivable, recorded investment, 90 days past due and still accruing	2,574	26
Real Estate | Construction & land development
Summary of allowance and loans individually and collectively evaluated for impairment [Abstract]
Allowance Individually Evaluated for Impairment	0	38
Allowance Individually Evaluated for Purchased Credit-Impairment	0	0
Allowance Collectively Evaluated for Impairment	423	543
Total Allowance for Credit Losses	423	581	628	1,232
Loans Individually Evaluated for Impairment	0	304
Loans Individually Evaluated for Purchased Credit-Impairment	526	0
Loans Collectively Evaluated for Impairment	171,721	124,340
Total Loans before Unearned Income	172,247	124,644
Financing receivable, recorded investment, 90 days past due and still accruing	48	0
Real Estate | Farmland
Summary of allowance and loans individually and collectively evaluated for impairment [Abstract]
Allowance Individually Evaluated for Impairment	0	0
Allowance Individually Evaluated for Purchased Credit-Impairment	0	0
Allowance Collectively Evaluated for Impairment	50	41
Total Allowance for Credit Losses	50	41	5	19
Loans Individually Evaluated for Impairment	543	552
Loans Individually Evaluated for Purchased Credit-Impairment	0	1
Loans Collectively Evaluated for Impairment	22,198	17,848
Total Loans before Unearned Income	22,741	18,401
Financing receivable, recorded investment, 90 days past due and still accruing	0	0
Real Estate | 1- 4 Family
Summary of allowance and loans individually and collectively evaluated for impairment [Abstract]
Allowance Individually Evaluated for Impairment	34	0
Allowance Individually Evaluated for Purchased Credit-Impairment	0	0
Allowance Collectively Evaluated for Impairment	993	911
Total Allowance for Credit Losses	1,027	911	1,078	1,204
Loans Individually Evaluated for Impairment	1,058	631
Loans Individually Evaluated for Purchased Credit-Impairment	6,402	48
Loans Collectively Evaluated for Impairment	282,175	172,081
Total Loans before Unearned Income	289,635	172,760
Financing receivable, recorded investment, 90 days past due and still accruing	923	26
Real Estate | Multifamily
Summary of allowance and loans individually and collectively evaluated for impairment [Abstract]
Allowance Individually Evaluated for Impairment	0	0
Allowance Individually Evaluated for Purchased Credit-Impairment	0	0
Allowance Collectively Evaluated for Impairment	1,038	1,318
Total Allowance for Credit Losses	1,038	1,318	994	591
Loans Individually Evaluated for Impairment	0	0
Loans Individually Evaluated for Purchased Credit-Impairment	0	0
Loans Collectively Evaluated for Impairment	23,973	42,918
Total Loans before Unearned Income	23,973	42,918
Financing receivable, recorded investment, 90 days past due and still accruing	0	0
Real Estate | Non-farm non-residential
Summary of allowance and loans individually and collectively evaluated for impairment [Abstract]
Allowance Individually Evaluated for Impairment	1,879	1,152
Allowance Individually Evaluated for Purchased Credit-Impairment	0	0
Allowance Collectively Evaluated for Impairment	3,398	3,619
Total Allowance for Credit Losses	5,277	4,771	2,811	3,451
Loans Individually Evaluated for Impairment	12,120	4,881
Loans Individually Evaluated for Purchased Credit-Impairment	2,294	2,301
Loans Collectively Evaluated for Impairment	602,122	579,081
Total Loans before Unearned Income	616,536	586,263
Financing receivable, recorded investment, 90 days past due and still accruing	1,603	0
Non-Real Estate
Summary of allowance and loans individually and collectively evaluated for impairment [Abstract]
Allowance Individually Evaluated for Impairment	111	110
Allowance Individually Evaluated for Purchased Credit-Impairment	0	0
Allowance Collectively Evaluated for Impairment	3,003	3,044
Total Allowance for Credit Losses	3,114	3,154	3,709	4,617
Loans Individually Evaluated for Impairment	7,011	4,071
Loans Individually Evaluated for Purchased Credit-Impairment	1,198	909
Loans Collectively Evaluated for Impairment	395,625	278,448
Total Loans before Unearned Income	403,834	283,428
Financing receivable, recorded investment, 90 days past due and still accruing	65	119
Non-Real Estate | Agricultural
Summary of allowance and loans individually and collectively evaluated for impairment [Abstract]
Allowance Individually Evaluated for Impairment	0	0
Allowance Individually Evaluated for Purchased Credit-Impairment	0	0
Allowance Collectively Evaluated for Impairment	95	339
Total Allowance for Credit Losses	95	339	187	74
Loans Individually Evaluated for Impairment	4,030	2,983
Loans Individually Evaluated for Purchased Credit-Impairment	0	0
Loans Collectively Evaluated for Impairment	22,680	20,125
Total Loans before Unearned Income	26,710	23,108
Financing receivable, recorded investment, 90 days past due and still accruing	0	0
Non-Real Estate | Commercial and industrial
Summary of allowance and loans individually and collectively evaluated for impairment [Abstract]
Allowance Individually Evaluated for Impairment	111	110
Allowance Individually Evaluated for Purchased Credit-Impairment	0	0
Allowance Collectively Evaluated for Impairment	1,798	1,799
Total Allowance for Credit Losses	1,909	1,909	2,377	3,543
Loans Individually Evaluated for Impairment	2,981	1,088
Loans Individually Evaluated for Purchased Credit-Impairment	1,198	909
Loans Collectively Evaluated for Impairment	264,077	198,880
Total Loans before Unearned Income	268,256	200,877
Financing receivable, recorded investment, 90 days past due and still accruing	15	53
Non-Real Estate | Consumer and other
Summary of allowance and loans individually and collectively evaluated for impairment [Abstract]
Allowance Individually Evaluated for Impairment	0	0
Allowance Individually Evaluated for Purchased Credit-Impairment	0	0
Allowance Collectively Evaluated for Impairment	1,110	891
Total Allowance for Credit Losses	1,110	891	1,125	972
Loans Individually Evaluated for Impairment	0	0
Loans Individually Evaluated for Purchased Credit-Impairment	0	0
Loans Collectively Evaluated for Impairment	108,868	59,443
Total Loans before Unearned Income	108,868	59,443
Financing receivable, recorded investment, 90 days past due and still accruing	50	66
Non-Real Estate | Unallocated
Summary of allowance and loans individually and collectively evaluated for impairment [Abstract]
Allowance Individually Evaluated for Impairment	0	0
Allowance Individually Evaluated for Purchased Credit-Impairment	0	0
Allowance Collectively Evaluated for Impairment	0	15
Total Allowance for Credit Losses	0	15	$ 20	$ 28
Loans Individually Evaluated for Impairment	0	0
Loans Individually Evaluated for Purchased Credit-Impairment	0	0
Loans Collectively Evaluated for Impairment	0	0
Total Loans before Unearned Income	$ 0	$ 0

Allowance for Loan Losses - Imp

Allowance for Loan Losses - Impaired Loans by Class (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Impaired Loans with no related allowance:
Recorded Investment	$ 15,383	$ 4,689
Unpaid Principal Balance	15,548	4,767
Average Recorded Investment	16,853	4,745
Interest Income Recognized	793	219
Interest Income Cash Basis	777	306
Impaired Loans with an allowance recorded:
Recorded Investment	5,349	4,158
Unpaid Principal Balance	5,698	4,158
Related Allowance	2,024	1,260
Average Recorded Investment	5,695	4,219
Interest Income Recognized	275	194
Interest Income Cash Basis	289	203
Total Impaired Loans
Recorded Investment	20,732	8,847
Unpaid Principal Balance	21,246	8,925
Related Allowance	2,024	1,260
Average Recorded Investment	22,548	8,964
Interest Income Recognized	1,068	413
Interest Income Cash Basis	1,066	509
Real Estate
Impaired Loans with no related allowance:
Recorded Investment	9,391	1,154
Unpaid Principal Balance	9,400	1,154
Average Recorded Investment	11,034	1,162
Interest Income Recognized	700	46
Interest Income Cash Basis	710	34
Impaired Loans with an allowance recorded:
Recorded Investment	4,330	3,070
Unpaid Principal Balance	4,679	3,070
Related Allowance	1,913	1,150
Average Recorded Investment	4,656	3,104
Interest Income Recognized	194	139
Interest Income Cash Basis	212	139
Total Impaired Loans
Related Allowance	1,913	1,150
Real Estate | Construction & land development
Impaired Loans with no related allowance:
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Interest Income Cash Basis	0	0
Impaired Loans with an allowance recorded:
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Interest Income Cash Basis	0	0
Total Impaired Loans
Related Allowance	0	0
Real Estate | Farmland
Impaired Loans with no related allowance:
Recorded Investment	543	0
Unpaid Principal Balance	552	0
Average Recorded Investment	550	0
Interest Income Recognized	0	0
Interest Income Cash Basis	0	0
Impaired Loans with an allowance recorded:
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Interest Income Cash Basis	0	0
Total Impaired Loans
Related Allowance	0	0
Real Estate | 1- 4 Family
Impaired Loans with no related allowance:
Recorded Investment	541	631
Unpaid Principal Balance	541	631
Average Recorded Investment	544	626
Interest Income Recognized	27	13
Interest Income Cash Basis	22	0
Impaired Loans with an allowance recorded:
Recorded Investment	517	0
Unpaid Principal Balance	517	0
Related Allowance	34	0
Average Recorded Investment	522	0
Interest Income Recognized	0	0
Interest Income Cash Basis	0	0
Total Impaired Loans
Related Allowance	34	0
Real Estate | Multifamily
Impaired Loans with no related allowance:
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Interest Income Cash Basis	0	0
Impaired Loans with an allowance recorded:
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Interest Income Cash Basis	0	0
Total Impaired Loans
Related Allowance	0	0
Real Estate | Non-farm non-residential
Impaired Loans with no related allowance:
Recorded Investment	8,307	523
Unpaid Principal Balance	8,307	523
Average Recorded Investment	9,940	536
Interest Income Recognized	673	33
Interest Income Cash Basis	688	34
Impaired Loans with an allowance recorded:
Recorded Investment	3,813	3,070
Unpaid Principal Balance	4,162	3,070
Related Allowance	1,879	1,150
Average Recorded Investment	4,134	3,104
Interest Income Recognized	194	139
Interest Income Cash Basis	212	139
Total Impaired Loans
Related Allowance	1,879	1,150
Non-Real Estate
Impaired Loans with no related allowance:
Recorded Investment	5,992	3,535
Unpaid Principal Balance	6,148	3,613
Average Recorded Investment	5,819	3,583
Interest Income Recognized	93	173
Interest Income Cash Basis	67	272
Impaired Loans with an allowance recorded:
Recorded Investment	1,019	1,088
Unpaid Principal Balance	1,019	1,088
Related Allowance	111	110
Average Recorded Investment	1,039	1,115
Interest Income Recognized	81	55
Interest Income Cash Basis	77	64
Total Impaired Loans
Related Allowance	111	110
Non-Real Estate | Agricultural
Impaired Loans with no related allowance:
Recorded Investment	4,030	3,535
Unpaid Principal Balance	4,186	3,613
Average Recorded Investment	4,031	3,583
Interest Income Recognized	12	173
Interest Income Cash Basis	0	272
Impaired Loans with an allowance recorded:
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Interest Income Cash Basis	0	0
Total Impaired Loans
Related Allowance	0	0
Non-Real Estate | Commercial and industrial
Impaired Loans with no related allowance:
Recorded Investment	1,962	0
Unpaid Principal Balance	1,962	0
Average Recorded Investment	1,788	0
Interest Income Recognized	81	0
Interest Income Cash Basis	67	0
Impaired Loans with an allowance recorded:
Recorded Investment	1,019	1,088
Unpaid Principal Balance	1,019	1,088
Related Allowance	111	110
Average Recorded Investment	1,039	1,115
Interest Income Recognized	81	55
Interest Income Cash Basis	77	64
Total Impaired Loans
Related Allowance	111	110
Non-Real Estate | Consumer and other
Impaired Loans with no related allowance:
Recorded Investment		0
Unpaid Principal Balance		0
Average Recorded Investment		0
Interest Income Recognized		0
Interest Income Cash Basis		0
Impaired Loans with an allowance recorded:
Recorded Investment	0	0
Unpaid Principal Balance	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Interest Income Recognized	0	0
Interest Income Cash Basis	0	0
Total Impaired Loans
Related Allowance	$ 0	$ 0

Allowance for Loan Losses - Age

Allowance for Loan Losses - Age Analysis of TDRs (Details)	12 Months Ended
	Dec. 31, 2019USD ($)contract	Dec. 31, 2018USD ($)contract
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of troubled debt restructurings | contract	0	0
Total TDRs	$ 0	$ 1,592,000
Nonaccrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	304,000
Current and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	1,288,000
30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	1,592,000
Real Estate | Nonaccrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	304,000
Real Estate | Current and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	1,288,000
Real Estate | 30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Real Estate | Construction & land development
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	304,000
Real Estate | Construction & land development | Nonaccrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	304,000
Real Estate | Construction & land development | Current and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Real Estate | Construction & land development | 30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Real Estate | Farmland
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Real Estate | Farmland | Nonaccrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Real Estate | Farmland | Current and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Real Estate | Farmland | 30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Real Estate | 1- 4 Family
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Real Estate | 1- 4 Family | Nonaccrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Real Estate | 1- 4 Family | Current and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Real Estate | 1- 4 Family | 30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Real Estate | Multifamily
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Real Estate | Multifamily | Nonaccrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Real Estate | Multifamily | Current and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Real Estate | Multifamily | 30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Real Estate | Non-farm non-residential
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	1,288,000
Real Estate | Non-farm non-residential | Nonaccrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Real Estate | Non-farm non-residential | Current and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	1,288,000
Real Estate | Non-farm non-residential | 30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Non-Real Estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Non-Real Estate | Nonaccrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Non-Real Estate | Current and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Non-Real Estate | 30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Non-Real Estate | Agricultural
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Non-Real Estate | Agricultural | Nonaccrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Non-Real Estate | Agricultural | Current and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Non-Real Estate | Agricultural | 30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Non-Real Estate | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Non-Real Estate | Commercial and industrial | Nonaccrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Non-Real Estate | Commercial and industrial | Current and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Non-Real Estate | Commercial and industrial | 30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Non-Real Estate | Consumer and other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Non-Real Estate | Consumer and other | Nonaccrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Non-Real Estate | Consumer and other | Current and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	0	0
Non-Real Estate | Consumer and other | 30-89 Days Past Due and Still Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total TDRs	$ 0	$ 0

Allowance for Loan Losses - TDR

Allowance for Loan Losses - TDR Activity (Details)	12 Months Ended
	Dec. 31, 2019USD ($)
TDR activity [Roll Forward]
Beginning balance	$ 1,592,000
New TDRs	0
Charge-offs post-modification	0
Transferred to ORE	0
Paydowns	0
Construction to permanent financing	0
Restructured to market terms	(1,592,000)
Other adjustments	0
Ending balance	0
Real Estate
TDR activity [Roll Forward]
Beginning balance	1,592,000
New TDRs	0
Charge-offs post-modification	0
Transferred to ORE	0
Paydowns	0
Construction to permanent financing	0
Restructured to market terms	(1,592,000)
Other adjustments	0
Ending balance	0
Real Estate | Construction & land development
TDR activity [Roll Forward]
Beginning balance	304,000
New TDRs	0
Charge-offs post-modification	0
Transferred to ORE	0
Paydowns	0
Construction to permanent financing	0
Restructured to market terms	(304,000)
Other adjustments	0
Ending balance	0
Real Estate | Farmland
TDR activity [Roll Forward]
Beginning balance	0
New TDRs	0
Charge-offs post-modification	0
Transferred to ORE	0
Paydowns	0
Construction to permanent financing	0
Restructured to market terms	0
Other adjustments	0
Ending balance	0
Real Estate | 1- 4 Family
TDR activity [Roll Forward]
Beginning balance	0
New TDRs	0
Charge-offs post-modification	0
Transferred to ORE	0
Paydowns	0
Construction to permanent financing	0
Restructured to market terms	0
Other adjustments	0
Ending balance	0
Real Estate | Multifamily
TDR activity [Roll Forward]
Beginning balance	0
New TDRs	0
Charge-offs post-modification	0
Transferred to ORE	0
Paydowns	0
Construction to permanent financing	0
Restructured to market terms	0
Other adjustments	0
Ending balance	0
Real Estate | Non-farm non-residential
TDR activity [Roll Forward]
Beginning balance	1,288,000
New TDRs	0
Charge-offs post-modification	0
Transferred to ORE	0
Paydowns	0
Construction to permanent financing	0
Restructured to market terms	(1,288,000)
Other adjustments	0
Ending balance	0
Non-Real Estate
TDR activity [Roll Forward]
Beginning balance	0
New TDRs	0
Charge-offs post-modification	0
Transferred to ORE	0
Paydowns	0
Construction to permanent financing	0
Restructured to market terms	0
Other adjustments	0
Ending balance	0
Non-Real Estate | Agricultural
TDR activity [Roll Forward]
Beginning balance	0
New TDRs	0
Charge-offs post-modification	0
Transferred to ORE	0
Paydowns	0
Construction to permanent financing	0
Restructured to market terms	0
Other adjustments	0
Ending balance	0
Non-Real Estate | Commercial and industrial
TDR activity [Roll Forward]
Beginning balance	0
New TDRs	0
Charge-offs post-modification	0
Transferred to ORE	0
Paydowns	0
Construction to permanent financing	0
Restructured to market terms	0
Other adjustments	0
Ending balance	0
Non-Real Estate | Consumer and other
TDR activity [Roll Forward]
Beginning balance	0
New TDRs	0
Charge-offs post-modification	0
Transferred to ORE	0
Paydowns	0
Construction to permanent financing	0
Restructured to market terms	0
Other adjustments	0
Ending balance	$ 0

Premises and Equipment (Details

Premises and Equipment (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Acquired value	$ 92,505,000	$ 73,831,000
Less: accumulated depreciation	36,041,000	34,136,000
Net book value	56,464,000	39,695,000
Depreciation expense	2,300,000	2,100,000	$ 1,800,000
Capitalized contract cost	91,000	54,000	$ 0
Land
Property, Plant and Equipment [Line Items]
Acquired value	15,180,000	12,875,000
Bank premises
Property, Plant and Equipment [Line Items]
Acquired value	40,536,000	33,457,000
Furniture and equipment
Property, Plant and Equipment [Line Items]
Acquired value	27,255,000	25,453,000
Construction in progress
Property, Plant and Equipment [Line Items]
Acquired value	$ 9,534,000	$ 2,046,000

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Impairment charges recognized on the Company's intangible assets	$ 0
Goodwill	12,942,000	$ 3,472,000
Amortization expense	$ 400,000	$ 500,000	$ 400,000
Core Deposits
Finite-Lived Intangible Assets [Line Items]
Weighted-average amortization	10 years 10 months

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Summary of Intangible Assets Subject to Amortization (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 17,824	$ 13,494
Accumulated Amortization	10,657	9,966
Net Carrying Amount	7,167	3,528
Core deposit intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	16,266	12,053
Accumulated Amortization	9,739	9,349
Net Carrying Amount	6,527	2,704
Loan servicing assets
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,558	1,441
Accumulated Amortization	918	617
Net Carrying Amount	$ 640	$ 824

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets - Amortization Expense Related to Purchase Accounting Intangibles (Details) $ in Thousands	Dec. 31, 2019USD ($)
Estimated Amortization Expense (in thousands)
December 31, 2020	$ 712
December 31, 2021	644
December 31, 2022	576
December 31, 2023	576
December 31, 2024	$ 576

Other Real Estate (Details)

Other Real Estate (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Real Estate Owned Acquired by Foreclosure:
Real Estate Owned Acquired by Foreclosure:	$ 4,879	$ 1,138
Residential
Real Estate Owned Acquired by Foreclosure:
Real Estate Owned Acquired by Foreclosure:	559	120
Construction & land development
Real Estate Owned Acquired by Foreclosure:
Real Estate Owned Acquired by Foreclosure:	669	241
Non-farm non-residential
Real Estate Owned Acquired by Foreclosure:
Real Estate Owned Acquired by Foreclosure:	$ 3,651	$ 777

Deposits (Details)

Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Maturities of time deposits
2020	$ 344,758
2021	90,279
2022	77,623
2023	101,672
2024 and thereafter	141,695
Total	756,027	$ 680,789
Brokered deposits	3,400
Aggregate amount of time deposits in denominations of $250,000 or more	$ 290,300	$ 301,800

Borrowings - Short-term Borrowi

Borrowings - Short-term Borrowings (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Short-term borrowings [Abstract]
Federal Home Loan Bank advances	$ 13,079,000	$ 0
Repurchase agreements	6,840,000	0
Line of credit	0	0
Total short-term borrowings	19,919,000	0	$ 15,500,000
Line of credit facility, maximum borrowing capacity	6,500,000
Available lines of credit including FHLB	278,800,000	216,400,000
Schedule of certain information short-term borrowings [Abstract]
Outstanding at year end	19,919,000	0	15,500,000
Maximum month-end outstanding	19,919,000	37,000,000	28,000,000
Average daily outstanding	$ 3,320,000	$ 7,119,000	$ 5,833,000
Weighted average rate during the year	2.00%	2.21%	1.06%
Weighted average rate at year end	2.00%	0.00%	1.51%

Borrowings - Long-term Debt (De

Borrowings - Long-term Debt (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Long-term federal home loan bank advance	$ 3,533,000	$ 0
Long-term debt outstanding	$ 63,300,000
Prime Rate | Fixed Interest Rate Period
Debt Instrument [Line Items]
Fixed interest rate	2.12%
Long-term federal home loan bank advance	$ 3,500,000	0
Senior Long-term Debt
Debt Instrument [Line Items]
Long-term debt outstanding	$ 48,558,000
Percentage of interest used in secured pledge borrowings	85.00%
Number of shares used in secured pledge borrowings (in shares)	4,823,899
Senior Long-term Debt | Prime Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.70%
Interest rate	4.05%
Long-term debt outstanding	$ 31,700,000	0
Periodic principal payment	$ 812,500
Senior Long-term Debt | Floating 3-Month LIBOR
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	2.50%
Interest rate	4.61%
Long-term debt outstanding	$ 16,900,000	19,800,000
Periodic principal payment	735,294
Junior Subordinated Debt
Debt Instrument [Line Items]
Long-term debt outstanding	$ 14,737,000
Junior Subordinated Debt | Prime Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.75%
Interest rate	4.00%
Long-term debt outstanding	$ 14,700,000	$ 14,700,000
Revolving Credit Facility
Debt Instrument [Line Items]
Percentage of interest used in secured pledge borrowings	13.20%
Number of shares used in secured pledge borrowings (in shares)	735,745

Borrowings - Line of Credit and

Borrowings - Line of Credit and Letters of Credit (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 6,500,000
Line of credit facility, remaining borrowing capacity	278,800,000	$ 216,400,000
Revolving Credit Facility
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	6,500,000
Line of credit facility, remaining borrowing capacity	$ 6,500,000
Line of credit facility, interest rate	5.00%
Federal Home Loan Bank (FHLB) | Letters of Credit
Line of Credit Facility [Line Items]
Letters of credit amount at FHLB	$ 355,200,000	$ 344,300,000

Borrowings - Obligations on Lon

Borrowings - Obligations on Long-term Debt (Details) $ in Thousands	Dec. 31, 2019USD ($)
Debt Instrument [Line Items]
Total	$ 63,300
Senior Long-term Debt
Debt Instrument [Line Items]
2020	19,349
2021	3,250
2022	3,250
2023	3,250
2024	19,500
2024 and thereafter	0
Subtotal	48,599
Debt issuance costs	(41)
Total	48,558
Junior Subordinated Debentures
Debt Instrument [Line Items]
2020	0
2021	0
2022	0
2023	0
2024	0
2024 and thereafter	15,000
Subtotal	15,000
Debt issuance costs	(263)
Total	$ 14,737

Capital Requirements (Details)

Capital Requirements (Details) - First Guaranty Bank $ in Thousands	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Capital conservation percentage	0.0458
Total Risk-based Capital, Amount
Actual	$ 213,962	$ 181,618
Minimum Capital Requirements	135,697	112,055
Minimum to be Well Capitalized Under Action Provisions	$ 169,621	$ 140,069
Total Risk-based Capital, Ratio
Actual	12.61%	12.97%
Minimum Capital Requirements	8.00%	8.00%
Minimum to be Well Capitalized Under Action Provisions	10.00%	10.00%
Tier 1 Capital, Amount
Actual	$ 203,034	$ 170,842
Minimum Capital Requirements	101,773	84,041
Minimum to be Well Capitalized Under Action Provisions	$ 135,697	$ 112,055
Tier 1 Capital, Ratio
Actual	11.96%	12.20%
Minimum Capital Requirements	6.00%	6.00%
Minimum to be Well Capitalized Under Action Provisions	8.00%	8.00%
Tier 1 Leverage Capital, Amount
Actual	$ 203,033	$ 170,842
Minimum Capital Requirements	77,771	69,822
Minimum to be Well Capitalized Under Action Provisions	$ 97,214	$ 87,277
Tier 1 Leverage Capital, Ratio
Actual	10.44%	9.79%
Minimum Capital Requirements	4.00%	4.00%
Minimum to be Well Capitalized Under Action Provisions	5.00%	5.00%
Common Equity Tier One Capital, Amount
Actual	$ 203,034	$ 170,842
Minimum Capital Requirements	76,329	63,031
Minimum to be Well Capitalized Under Action Provisions	$ 110,254	$ 91,045
Common Equity Tier One Capital, Ratio
Actual	11.96%	12.20%
Minimum Capital Requirements	4.50%	4.50%
Minimum to be Well Capitalized Under Action Provisions	6.50%	6.50%

Dividend Restrictions (Details)

Dividend Restrictions (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)
Dividend Restrictions [Abstract]
Percentage of outstanding capital stock, maximum	50.00%
Undistributed earnings	$ 2.1
Restricted investments	$ 222.6

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($) $ in Thousands	Dec. 21, 2015	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Loans and Leases Receivable, Related Parties [Roll Forward]
Balance, beginning of year		$ 63,907	$ 82,918
Net (Decrease) Increase		(2,087)	(19,011)
Balance, end of year		$ 61,820	63,907	$ 82,918
Centurion Insurance
Loans and Leases Receivable, Related Parties [Roll Forward]
Equity method investment, ownership percentage		40.00%
Directors and Executive Officers
Loans and Leases Receivable, Related Parties [Roll Forward]
Deposit from related party		$ 41,500
Directors and Executive Officers | Unfunded Loan Commitment
Loans and Leases Receivable, Related Parties [Roll Forward]
Balance, beginning of year		8,600
Balance, end of year		21,600	8,600
Affiliated Entity | Champion Industries, Inc.
Loans and Leases Receivable, Related Parties [Roll Forward]
Expenses from transactions with related party		500	300	400
Affiliated Entity | Hood Automotive Group
Loans and Leases Receivable, Related Parties [Roll Forward]
Expenses from transactions with related party		100	200	6
Affiliated Entity | Gasaway Gasaway Bankston
Loans and Leases Receivable, Related Parties [Roll Forward]
Expenses from transactions with related party		$ 69	700	$ 200
Director | Subordinated Debt
Loans and Leases Receivable, Related Parties [Roll Forward]
Debt instrument, face amount	$ 15,000
Debt instrument, term		10 years
Interest amount		$ 600	600
Director | Subordinated Debt | Fixed Interest Rate Period
Loans and Leases Receivable, Related Parties [Roll Forward]
Debt instrument, non-callable term		5 years
Debt instrument, interest rate	4.00%
Director | Subordinated Debt | Floating Interest Rate Period
Loans and Leases Receivable, Related Parties [Roll Forward]
Debt instrument, term		5 years
Director | Subordinated Debt | Floating Interest Rate Period | Prime Rate
Loans and Leases Receivable, Related Parties [Roll Forward]
Debt instrument, basis spread on variable rate	0.75%
Equity Method Investee | Centurion Insurance
Loans and Leases Receivable, Related Parties [Roll Forward]
Expenses from transactions with related party		$ 300	$ 200

Employee Benefit Plans (Details

Employee Benefit Plans (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Payment Arrangement [Abstract]
Deferment percentage of base salary, minimum	1.00%
Deferment percentage of base salary, maximum	20.00%
Employer matching contribution	6.00%
Maximum employer matching contribution percentage	100.00%
Contributions to savings plan	$ 149,000	$ 292,000	$ 240,000
Contributions made to ESOP	$ 0	$ 0	$ 0
Shares held under ESOP (in shares)	5,644

Other Expenses (Details)

Other Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Other noninterest expense:
Legal and professional fees	$ 2,648	$ 2,362	$ 3,049
Data processing	1,972	1,692	1,608
ATM Fees	1,217	1,214	1,161
Marketing and public relations	1,456	1,329	1,205
Taxes - sales, capital and franchise	1,094	1,066	970
Operating supplies	674	562	496
Software expense and amortization	1,308	1,119	923
Travel and lodging	908	978	910
Telephone	193	208	167
Amortization of core deposits	390	545	432
Donations	603	380	322
Net costs from other real estate and repossessions	422	186	306
Regulatory assessment	683	941	726
Other	2,536	2,204	1,628
Total other noninterest expense	16,104	14,786	13,903
Advertising expense	$ 800	$ 900	$ 700

Income Taxes (Details)

Income Taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current	$ 3,770,000	$ 3,929,000	$ 4,638,000
Deferred	(114,000)	(467,000)	2,761,000
Total	$ 3,656,000	$ 3,462,000	$ 7,399,000
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Statutory tax rate	21.00%	21.00%	35.00%
Federal income taxes at statutory rate	$ 3,758,000	$ 3,712,000	$ 6,703,000
Tax exempt municipal income	(140,000)	(166,000)	(254,000)
Other	38,000	(84,000)	950,000
Total	3,656,000	3,462,000	7,399,000
Estimated net impact from remeasurement of deferred tax assets and liabilities			900,000
Deferred tax assets:
Allowance for loan losses	1,720,000	2,159,000
Other real estate owned	257,000	28,000
Unrealized losses on available for sale securities	0	1,897,000
Net operating loss	1,282,000	1,374,000
Other	508,000	456,000
Gross deferred tax assets	3,767,000	5,914,000
Deferred tax liabilities:
Depreciation and amortization	(2,010,000)	(1,537,000)
Core deposit intangibles	(1,359,000)	(552,000)
Unrealized gains on available for sale securities	(578,000)	0
Discount on purchased loans	(267,000)	0
Other	(670,000)	(589,000)
Gross deferred tax liabilities	(4,884,000)	(2,678,000)
Net deferred tax (liabilities) assets	(1,117,000)
Net deferred tax (liabilities) assets		3,236,000
Net operating loss carryforwards	6,100,000	6,500,000
Income Tax Uncertainties [Abstract]
Income tax penalties expense	0	0	0
Interest on income taxes expense	0	0	0
Income tax penalties accrued	0	0	0
Interest on income taxes accrued	$ 0	$ 0	$ 0

Commitments and Contingencies_2

Commitments and Contingencies (Details)	12 Months Ended
	Dec. 31, 2019USD ($)facility	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Extension period of majority of short-term borrowing	1 year
Maximum extension period of short-term borrowing	3 years
Losses incurred on off-balance sheet commitments	$ 0	$ 0	$ 0
Acquired value	92,505,000	73,831,000
Commitments to Extend Credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional value	117,826,000	108,348,000
Unfunded Commitments under lines of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional value	148,127,000	122,212,000
Commercial and Standby letters of credit
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional value	11,258,000	6,912,000
Construction Commitment
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Notional value	$ 10,100,000
Number of facilities under construction | facility	1
Construction in progress
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Acquired value	$ 9,534,000	$ 2,046,000
Construction in progress | Construction Commitment
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Acquired value	$ 6,800,000

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale measured at fair value	$ 340,434	$ 296,977
Level 3 Changes
Balance, beginning of year	4,761	6,533
Total gains or losses (realized/unrealized):
Included in earnings	0	(15)
Included in other comprehensive income	146	(79)
Purchases, sales, issuances and settlements, net	4,491	(1,886)
Transfers in and/or out of Level 3	0	208
Balance as of end of year	9,398	4,761
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale measured at fair value	340,434	296,977
Fair Value, Measurements, Recurring | Level 1: Quoted Prices in Active Markets For Identical Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale measured at fair value	497	483
Fair Value, Measurements, Recurring | Level 2: Significant Other Observable Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale measured at fair value	330,539	291,733
Fair Value, Measurements, Recurring | Level 3: Significant Unobservable Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale measured at fair value	9,398	4,761
Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans measured at fair value	4,046	3,620
Other real estate owned measured at fair value	4,879	1,138
Fair Value, Measurements, Nonrecurring | Level 1: Quoted Prices in Active Markets For Identical Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans measured at fair value	0	0
Other real estate owned measured at fair value	0	0
Fair Value, Measurements, Nonrecurring | Level 2: Significant Other Observable Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans measured at fair value	0	0
Other real estate owned measured at fair value	4,158	1,012
Fair Value, Measurements, Nonrecurring | Level 3: Significant Unobservable Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans measured at fair value	4,046	3,620
Other real estate owned measured at fair value	$ 721	$ 126

Financial Instruments (Details)

Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Assets
Securities, available for sale	$ 340,434	$ 296,977
Securities, held to maturity	86,817	104,840
Carrying Value
Assets
Cash and cash equivalents	67,425	127,965
Securities, available for sale	340,434	296,977
Securities, held to maturity	86,579	108,326
Federal Home Loan Bank stock	3,308	2,393
Loans held for sale	0	344
Loans, net	1,514,561	1,214,492
Accrued interest receivable	8,412	6,716
Liabilities
Deposits	1,853,013	1,629,622
Borrowings	72,010	19,838
Junior subordinated debentures	14,737	14,700
Accrued interest payable	6,047	3,952
Estimated Fair Value
Assets
Cash and cash equivalents	67,425	127,965
Securities, available for sale	340,434	296,977
Securities, held to maturity	86,817	104,840
Federal Home Loan Bank stock	3,308	2,393
Loans held for sale	0	379
Loans, net	1,515,277	1,193,886
Accrued interest receivable	8,412	6,716
Liabilities
Deposits	1,863,179	1,625,827
Borrowings	71,969	19,853
Junior subordinated debentures	14,762	14,537
Accrued interest payable	$ 6,047	$ 3,952

Concentrations of Credit and _2

Concentrations of Credit and Other Risks (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)deposit
Risks and Uncertainties [Abstract]
Percentage of entity deposits	33.00%
Number of deposits of depositing authorities | deposit	1
Public fund deposits | $	$ 610.7

Litigation (Details)

Litigation (Details) $ in Millions	Dec. 31, 2019USD ($)
Overpayment Of Interest On A Loan
Loss Contingencies [Line Items]
Accrued liability	$ 0.1
Overpayment Of Interest On A Loan | Minimum
Loss Contingencies [Line Items]
Lawsuit alleging fault for a loss of funds with possible loss	0
Overpayment Of Interest On A Loan | Maximum
Loss Contingencies [Line Items]
Lawsuit alleging fault for a loss of funds with possible loss	0.5
Loss Of Funds By Customer | Minimum
Loss Contingencies [Line Items]
Lawsuit alleging fault for a loss of funds with possible loss	0
Loss Of Funds By Customer | Maximum
Loss Contingencies [Line Items]
Lawsuit alleging fault for a loss of funds with possible loss	$ 1.5

Condensed Parent Company Info_3

Condensed Parent Company Information - Condensed Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	[1]
Assets
Securities available for sale measured at fair value	$ 340,434	$ 296,977
Other assets	15,046	12,165
Total Assets	2,117,216	1,817,211
Liabilities and Shareholders' Equity
Senior long-term debt	48,558	19,838
Junior subordinated debentures	14,737	14,700
Other liabilities	5,374	1,815
Total Liabilities	1,951,181	1,669,927
Shareholders' Equity	166,035	147,284	$ 143,983	$ 124,349
Total Liabilities and Shareholders' Equity	2,117,216	1,817,211
Parent Company
Assets
Cash	633	8,069
Investment in bank subsidiary	224,677	169,880
Other assets	4,427	4,724
Total Assets	229,737	182,673
Liabilities and Shareholders' Equity
Senior long-term debt	48,558	19,838
Junior subordinated debentures	14,738	14,700
Other liabilities	406	851
Total Liabilities	63,702	35,389
Shareholders' Equity	166,035	147,284
Total Liabilities and Shareholders' Equity	$ 229,737	$ 182,673
[1]	All share and per share amounts reflect the ten percent stock dividend paid December 16, 2019 to shareholders of record as of December 9, 2019.

Condensed Parent Company Info_4

Condensed Parent Company Information - Condensed Statements of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Expenses
Interest expense	$ 29,966	$ 21,366	$ 14,393
Salaries & Benefits	25,019	22,888	20,113
Income before income tax benefit and increase in equity in undistributed earnings of subsidiary	17,897	17,675	19,150
Income tax benefit	(3,656)	(3,462)	(7,399)
Net Income	14,241	14,213	11,751
Parent Company
Operating Income
Dividends received from bank subsidiary	13,982	11,788	10,622
Net gains on sale of equity securities	196	0	54
Other income	424	289	171
Total operating income	14,602	12,077	10,847
Operating Expenses
Interest expense	1,795	1,675	1,518
Salaries & Benefits	208	133	495
Other expenses	953	916	1,147
Total operating expenses	2,956	2,724	3,160
Income before income tax benefit and increase in equity in undistributed earnings of subsidiary	11,646	9,353	7,687
Income tax benefit	494	540	834
Income before increase in equity in undistributed earnings of subsidiary	12,140	9,893	8,521
Increase in equity in undistributed earnings of subsidiary	2,101	4,320	3,230
Net Income	$ 14,241	$ 14,213	$ 11,751

Condensed Parent Company Info_5

Condensed Parent Company Information - Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net income	$ 14,241	$ 14,213	$ 11,751
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,057	3,289	2,444
Gain on sale of securities	157	1,830	(1,397)
Net Cash Provided by Operating Activities	29,078	26,889	12,275
Cash flows from investing activities:
Proceeds from maturities, calls and sales of AFS securities	279,590	384,549	542,894
Proceeds from sales of equity securities	(274,437)	(309,346)	(517,185)
Net Cash (Used In) Provided By Investing Activities	(131,906)	6,789	(82,996)
Cash flows from financing activities:
Proceeds from long-term debt, net of costs	32,465	0	3,750
Repayment of long-term debt	(3,754)	(2,941)	(3,081)
Common stock issued in private placement	1,000	0	0
Dividends paid	(5,803)	(5,636)	(5,210)
Net Cash Provided By Financing Activities	42,288	56,259	90,638
Net (Decrease) Increase In Cash and Cash Equivalents	(60,540)	89,937	19,917
Cash and Cash Equivalents at the Beginning of the Period	127,965	38,028	18,111
Cash and Cash Equivalents at the End of the Period	67,425	127,965	38,028
Parent Company
Cash flows from operating activities:
Net income	14,241	14,213	11,751
Adjustments to reconcile net income to net cash provided by operating activities:
Increase in equity in undistributed earnings of subsidiary	(2,101)	(4,320)	(3,230)
Depreciation and amortization	80	43	43
Gain on sale of securities	(196)	0	(54)
Net change in other liabilities	(444)	136	187
Net change in other assets	(601)	1,360	(1,306)
Net Cash Provided by Operating Activities	10,979	11,432	7,391
Cash flows from investing activities:
Proceeds from maturities, calls and sales of AFS securities	0	0	134
Proceeds from sales of equity securities	1,196	0	0
Funds invested in bank subsidiary	0	0	(3,750)
Purchases of premises and equipment	(136)	0	0
Cash paid in acquisition	(43,383)	0	(10,108)
Net Cash (Used In) Provided By Investing Activities	(42,323)	0	(13,724)
Cash flows from financing activities:
Proceeds from long-term debt, net of costs	32,465	0	3,750
Repayment of long-term debt	(3,754)	(2,941)	(3,081)
Proceeds from junior subordinated debentures, net of costs	0	0	0
Common stock issued in private placement	1,000	0	0
Dividends paid	(5,803)	(5,636)	(5,210)
Net Cash Provided By Financing Activities	23,908	(8,577)	(4,541)
Net (Decrease) Increase In Cash and Cash Equivalents	(7,436)	2,855	(10,874)
Cash and Cash Equivalents at the Beginning of the Period	8,069	5,214	16,088
Cash and Cash Equivalents at the End of the Period	$ 633	$ 8,069	$ 5,214