SmartFinancial (SMBK) 10-K 18 Mar 19 2018 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Mar. 06, 2019	Jun. 30, 2018
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Entity Registrant Name	SMARTFINANCIAL INC.
Entity Central Index Key	0001038773
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 Shell Company	false
Entity Emerging Growth Company	false
Entity Small Business	true
Entity Public Float			$ 294.2
Trading Symbol	SMBK
Entity Common Stock, Shares Outstanding		13,946,283

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($)	Dec. 31, 2018	Dec. 31, 2017
ASSETS
Cash and due from banks	$ 40,015,438	$ 64,097,287
Interest-bearing deposits at other financial institutions	75,807,021	41,965,597
Federal funds sold	0	6,964,000
Total cash and cash equivalents	115,822,459	113,026,884
Securities available-for-sale	201,687,683	151,944,567
Restricted investments, at cost	11,499,000	6,430,700
Loans, net of allowance for loan losses of $8,275,055 in 2018 and $5,860,291 in 2017	1,768,963,569	1,317,397,909
Bank premises and equipment, net	56,012,184	43,000,249
Foreclosed assets	2,495,458	3,254,392
Goodwill and core deposit intangible, net	79,033,607	50,836,840
Cash surrender value of life insurance	24,381,485	21,646,894
Other assets	14,513,890	13,232,247
Total assets	2,274,409,335	1,720,770,682
Deposits:
Noninterest-bearing demand deposits	319,861,237	220,520,287
Interest-bearing demand deposits	311,482,434	231,643,508
Money market and savings deposits	641,944,880	543,644,830
Time deposits	648,675,440	442,774,094
Total deposits	1,921,963,991	1,438,582,719
Securities sold under agreement to repurchase	11,755,923	24,054,730
Federal funds purchased and other borrowings	11,242,533	43,600,000
Subordinated debt	39,176,947	0
Accrued expenses and other liabilities	7,258,460	8,681,393
Total liabilities	1,991,397,854	1,514,918,842
Stockholders' equity:
Preferred stock - $1 par value; 2,000,000 shares authorized; None issued and outstanding as of December 31, 2018 and 2017	0	0
Common stock - $1 par value; 40,000,000 shares authorized; 13,933,504 and 11,152,561 shares issued and outstanding in 2018 and 2017, respectively	13,933,504	11,152,561
Additional paid-in capital	231,851,730	174,008,753
Retained earnings	39,990,990	21,888,575
Accumulated other comprehensive loss	(2,764,743)	(1,198,049)
Total stockholders' equity	283,011,481	205,851,840
Total liabilities and stockholders' equity	$ 2,274,409,335	$ 1,720,770,682

Consolidated Balance Sheets _Pa

Consolidated Balance Sheets [Parenthetical] - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Allowance for loan losses (in dollars)	$ 8,275,055	$ 5,860,291
Preferred Stock, Par value (in dollars per share)	$ 1	$ 1
Preferred stock, shares authorized (in shares)	2,000,000	2,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	40,000,000	40,000,000
Common stock, shares issued (in shares)	13,933,504	11,152,561
Common stock, shares outstanding (in shares)	13,933,504	11,152,561

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
INTEREST INCOME
Loans, including fees	$ 86,469,051	$ 48,805,647
Securities and interest-bearing deposits at other financial institutions	5,147,002	2,862,825
Federal funds sold and other earning assets	594,093	353,924
Total interest income	92,210,146	52,022,396
INTEREST EXPENSE
Deposits	14,288,090	5,518,350
Securities sold under agreements to repurchase	44,509	61,933
Subordinated debt	603,045	0
Federal funds purchased and other borrowings	630,533	113,070
Total interest expense	15,566,177	5,693,353
Net interest income before provision for loan losses	76,643,969	46,329,043
Provision for loan losses	2,936,472	782,687
Net interest income after provision for loan losses	73,707,497	45,546,356
NONINTEREST INCOME
Customer service fees	2,416,126	1,374,068
Interchange and debit card transaction fees	573,194	952,294
Gain on sale of securities	1,255	143,508
Gain on sale of loans and other assets	1,432,652	1,275,925
Other noninterest income	2,160,888	1,281,493
Total noninterest income	6,584,115	5,027,288
NONINTEREST EXPENSES
Salaries and employee benefits	30,629,961	20,743,153
Net occupancy and equipment expense	6,303,466	4,271,289
FDIC insurance	786,105	465,844
Foreclosed assets	775,535	131,703
Advertising	872,547	637,600
Data processing	1,905,777	1,875,462
Professional services	3,647,164	2,084,735
Amortization of intangible assets	976,195	346,435
Software as services contracts	2,054,411	1,398,018
Merger expenses	3,780,785	2,417,070
Other operating expenses	7,223,848	4,758,480
Total noninterest expenses	58,955,794	39,129,789
Income before income tax expense	21,335,818	11,443,855
Income tax expense	3,233,403	6,428,791
Net income	18,102,415	5,015,064
Preferred stock dividends	0	195,000
Net income available to common stockholders	$ 18,102,415	$ 4,820,064
EARNINGS PER COMMON SHARE
Basic (in dollars per share)	$ 1.46	$ 0.56
Diluted (in dollars per share)	$ 1.45	$ 0.55
Weighted average common shares outstanding
Basic (in shares)	12,423,618	8,639,212
Diluted (in shares)	12,517,640	8,793,527

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 18,102,415	$ 5,015,064
Other comprehensive income (loss), net of tax:
Unrealized holding gains (losses) arising during the year, net of tax (benefit) expense of $(514,287) and $55,405 in 2018 and 2017, respectively	(1,565,719)	90,381
Reclassification adjustment for gains included in net income, net of tax expense of $280 and $54,533 in 2018 and 2017, respectively	(975)	(88,975)
Total other comprehensive loss	(1,566,694)	1,406
Effect of tax rate change on unrealized gains (losses) on available-for-sale securities	0	(197,215)
Total other comprehensive loss	(1,566,694)	(195,809)
Comprehensive income	$ 16,535,721	$ 4,819,255

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income [Parenthetical] - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Unrealized holding losses arising during the year, tax expense (benefit)	$ (514,287)	$ 55,405
Reclassification adjustment for gains included in net income, tax expense	$ 280	$ 54,533

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($)	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Capstone Bancshares Inc. [Member]	Capstone Bancshares Inc. [Member]Common Stock [Member]	Capstone Bancshares Inc. [Member]Additional Paid-in Capital [Member]	Foothills Bancorp [Member]	Foothills Bancorp [Member]Common Stock [Member]	Foothills Bancorp [Member]Additional Paid-in Capital [Member]	Tennessee Bancshares [Member]	Tennessee Bancshares [Member]Common Stock [Member]	Tennessee Bancshares [Member]Additional Paid-in Capital [Member]
BALANCE at Dec. 31, 2016	$ 105,240,140	$ 12,000	$ 5,896,033	$ 83,463,051	$ 16,871,296	$ (1,002,240)
Net income	5,015,064				5,015,064
Other comprehensive gain (loss)	1,406					1,406
Reclassification adjustment for tax rate change					197,215	(197,215)
Issuance of common stock	32,934,676		1,840,000	31,094,676
Issuance of stock grants and restricted stock	31,791		1,511	30,280
Shares issued to shareholders							$ 69,783,821	$ 2,908,094	$ 66,875,727
Redemption of preferred stock	(12,000,000)	(12,000)		(11,988,000)
Exercise of stock options	4,885,646		506,923	4,378,723
Dividends on preferred stock	(195,000)				(195,000)
Stock compensation expense	154,296			154,296
BALANCE at Dec. 31, 2017	205,851,840	0	11,152,561	174,008,753	21,888,575	(1,198,049)
Net income	18,102,415				18,102,415
Other comprehensive gain (loss)	(1,566,694)					(1,566,694)
Issuance of stock grants and restricted stock	9,062		5,947	3,115
Shares issued to shareholders										$ 23,966,795	$ 1,183,232	$ 22,783,563	$ 34,731,922	$ 1,458,981	$ 33,272,941
Exercise of stock options	1,519,244		132,783	1,386,461
Stock compensation expense	396,897			396,897
BALANCE at Dec. 31, 2018	$ 283,011,481	$ 0	$ 13,933,504	$ 231,851,730	$ 39,990,990	$ (2,764,743)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 18,102,415	$ 5,015,064
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization, and accretion	(3,717,501)	(1,691,396)
Provision for loan losses	2,936,472	782,687
Stock compensation expense	396,897	154,296
Gains from redemption and sale of securities available-for-sale	(1,255)	(143,508)
Deferred income tax expense	2,431,705	1,599,000
Income on bank owned life insurance, net	(595,718)	(295,040)
Loss on disposal of fixed assets	41,215	0
Net gains from sale of loans and other assets	(1,432,652)	(1,275,925)
Net losses from sale of foreclosed assets	643,215	47,795
Loans originated for sale	(52,070,349)	(35,547,322)
Proceeds from sale of loans originated for sale	55,761,398	35,576,882
Changes in other assets and liabilities:
Accrued interest receivable	(377,666)	(331,347)
Accrued interest payable	816,740	31,488
Other assets and liabilities	(2,110,950)	(2,682,548)
Net cash provided by operating activities	20,823,966	1,240,126
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of securities available-for-sale	(72,149,260)	(53,998,043)
Proceeds from sales, maturities, and paydowns of securities available-for-sale	93,478,332	82,636,066
(Purchase) redemption of restricted investments	(4,053,000)
(Purchase) redemption of restricted investments		246,350
Purchase of bank owned life insurance	0	(10,000,000)
Loan originations and principal collections, net	(117,642,156)	(66,724,124)
Purchase of bank premises and equipment	(3,846,490)	(2,798,898)
Proceeds from sale of foreclosed assets	4,972,526	82,864
Net cash and cash equivalents paid (received) in business combinations	4,365,193	(178,312)
Net cash used in investing activities	(94,874,855)	(50,734,097)
CASH FLOWS FROM FINANCING ACTIVITIES
Net increase in deposits	95,073,483	50,474,866
Net decrease in securities sold under agreements to repurchase	(12,599,642)	(2,567,254)
Issuance of common stock	1,528,306	37,852,113
Payment of dividends on preferred stock	0	(195,000)
Redemption of preferred stock	0	(12,000,000)
Net proceeds from subordinated debt	39,158,444	0
Repayment of Federal Home Loan Bank advances and other borrowings	(221,691,352)	(119,196,383)
Proceeds from Federal Home Loan Bank advances and other borrowings	175,377,225	139,404,205
Net cash provided by financing activities	76,846,464	93,772,547
NET INCREASE IN CASH AND CASH EQUIVALENTS	2,795,575	44,278,576
CASH AND CASH EQUIVALENTS, beginning of year	113,026,884	68,748,308
CASH AND CASH EQUIVALENTS, end of year	115,822,459	113,026,884
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Cash paid during the period for interest	14,749,437	5,399,749
Cash paid during the period for income taxes	856,756	3,531,984
NONCASH INVESTING AND FINANCING ACTIVITIES
Change in unrealized losses on securities available-for-sale	2,081,261	(2,276)
Acquisition of real estate through foreclosure	4,439,866	588,775
Transfer from Bank premises to foreclosed assets	(1,289,102)	0
Change in goodwill due to acquisitions	23,212,962	38,707,620
Financed sales of foreclosed assets	$ 1,601,471	$ 0

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Nature of Business: SmartFinancial, Inc. (the "Company") is a bank holding company whose principal activity is the ownership and management of its wholly-owned subsidiary, SmartBank (the "Bank"). The Company provides a variety of financial services to individuals and corporate customers through its offices in Tennessee, Alabama, Florida, and Georgia. The Company's primary deposit products are interest-bearing demand deposits, savings and money market deposits, and time deposits. Its primary lending products are commercial, residential, and consumer loans. Basis of Presentation and Accounting Estimates: The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiary. All significant intercompany balances and transactions have been eliminated in consolidation. In preparing the consolidated financial statements in conformity with accounting principles generally accepted in the United States of America, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the balance sheet, and reported amounts of revenues and expenses during the reporting period. 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 foreclosed assets and deferred taxes, other than temporary impairments of securities, the fair value of financial instruments, goodwill, and business combination elements (Day 1 and Day 2 Valuation). The Company has evaluated subsequent events for potential recognition and/or disclosure in the consolidated financial statements and accompanying notes included in this Annual Report through the date of the issued consolidated financial statements. Cash and Cash Equivalents: For purposes of reporting consolidated cash flows, cash and due from banks includes cash on hand, cash items in process of collection and amounts due from banks. Cash and cash equivalents also includes interest-bearing deposits in banks and federal funds sold. Cash flows from loans, federal funds sold, securities sold under agreements to repurchase and deposits are reported net. The Bank is required to maintain average balances in cash or on deposit with the Federal Reserve Bank. The reserve requirement was $36.7 million and $16.5 million at December 31, 2018 and 2017 , respectively. The Company places its cash and cash equivalents with other financial institutions and limits the amount of credit exposure to any one financial institution. From time to time, the balances at these financial institutions exceed the amount insured by the Federal Deposit Insurance Corporation. The Company has not experienced any losses on these accounts and management considers this to be a normal business risk. Securities: Management has classified all securities as available-for-sale. Securities available-for-sale are recorded at fair value, with unrealized gains and losses excluded from earnings and reported in other comprehensive loss. Purchase premiums and discounts are recognized in interest income using the interest method over the terms of the securities. Gains and losses on the sale of securities are recorded on the trade date and are determined using the specific identification method. The Company evaluates securities quarterly for other than temporary impairment using relevant accounting guidance specifying that (a) if the Company does not have the intent to sell a debt security prior to recovery and (b) it is more likely than not that it will not have to sell the debt security prior to recovery, the security would not be considered other than temporarily impaired unless a credit loss has occurred in the security. If management does not intend to sell the security and it is more likely than not that they will not have to sell the security before recovery of the cost basis, management will recognize the credit component of an other-than- temporary impairment of a debt security in earnings and the remaining portion in other comprehensive loss. Securities (continued): Securities borrowed or purchased under agreements to resell and securities loaned or sold under agreements to repurchase are treated as collateralized financial transactions. These agreements are recorded at the amount at which the securities were acquired or sold plus accrued interest. It is the Company's policy to take possession of securities purchased under resale agreements. The market value of these securities is monitored, and additional securities are obtained when deemed appropriate to ensure such transactions are adequately collateralized. The Company also monitors its exposure with respect to securities sold under repurchase agreements, and a request for the return of excess securities held by the counterparty is made when deemed appropriate. Restricted Investments: The Company is required to maintain an investment in capital stock of various entities. Based on redemption provisions of these entities, the stock has no quoted market value and is carried at cost. At their discretion, these entities may declare dividends on the stock. Management reviews restricted investments for impairment based on the ultimate recoverability of the cost basis in these stocks. Loans: Loans that management has the intent and ability to hold for the foreseeable future or until maturity or pay-off are reported at their outstanding principal balances less deferred fees and costs on originated loans and the allowance for loan losses. Interest income is accrued on the outstanding principal balance. Loan origination fees, net of certain direct origination costs of consumer and installment loans are recognized at the time the loan is placed on the books. Loan origination fees for all other loans are deferred and recognized as an adjustment of the yield over the life of the loan using the straight-line method without anticipating prepayments. The accrual of interest on loans is discontinued when, in management's opinion, the borrower may be unable to meet payments as they become due, or at the time the loan is 90 days past due, unless the loan is well-secured and in the process of collection. Unsecured loans are typically charged off no later than 120 days past due. Past due status is based on contractual terms of the loan. In all cases, loans are placed on nonaccrual or charged-off at an earlier date if collection of principal and interest is considered doubtful. All interest accrued but not collected for loans that are placed on nonaccrual or charged off is reversed against interest income or charged to the allowance, unless management believes that the accrual of interest is recoverable through the liquidation of collateral. Interest income on nonaccrual loans is recognized on the cash basis, until the loans are returned to accrual status. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and the loan has been performing according to the contractual terms for a period of not less than six months. Loans Held for Sale: Loans originated and intended for sale in the secondary market are carried at the lower of aggregate cost or fair value. When a loan is placed in the held-for-sale category, we stop amortizing the related deferred fees and costs. The remaining unamortized fees and costs are recognized as part of the cost basis of the loan at the time it is sold. Loans held for sale primarily represent mortgage loans on one-to-four family dwellings ("Mortgage") and to a lesser extent the portion of Small Business Administration (“SBA”) loans intended to be sold. Realized gains and losses for Mortgage loans are recognized when legal title to the loans has been transferred to the purchaser and sales proceeds have been received and are reflected in the accompanying consolidated statement of income in gains on sale of loans and other assets. We generally sell the guaranteed portion of SBA loans in the secondary market and retain the unguaranteed portion in our portfolio. Upon sale of the guaranteed portion of an SBA loan, we recognize a portion of the gain on sale into income and defer a portion of the gain related to the relative fair value of the unguaranteed loan balance we retain. The deferred gain is amortized into income over the remaining life of the loan. Gains and losses on sales of loans held for sale are included in the Consolidated Statements of Operations in gains on sale of loans and other assets. Acquired Loans: Acquired loans are those acquired in business combinations by the Company or Bank. The fair values of acquired loans with evidence of credit deterioration, Purchased Credit Impaired loans (“ PCI loans ”), are recorded net of a nonaccretable discount and accretable discount. Any excess of cash flows expected at acquisition over the estimated fair value is referred to as the accretable discount and is recognized in interest income over the remaining life of the loan when there is reasonable expectation about the amount and timing of such cash flows. The difference between contractually required payments at acquisition and the cash flows expected to be collected at acquisition is the nonaccretable discount, which is included in the carrying amount of acquired loans. Subsequent decreases to the expected cash flows will generally result in a provision for loan losses. Subsequent significant increases in cash flows result in a reversal of the provision for loan losses to the extent of prior charges or a reclassification of the difference from nonaccretable to accretable with a positive impact on the accretable discount. Acquired loans are initially recorded at fair value at acquisition date. Accretable discounts related to certain fair value adjustments are accreted into income over the estimated lives of the loans. The Company accounts for PCI loans acquired in the acquisition using the expected cash flows method of recognizing discount accretion based on the acquired loans' expected cash flows. Management recasts the estimate of cash flows expected to be collected on each acquired impaired loan pool periodically. If the present value of expected cash flows for a pool is less than its carrying value, an impairment is recognized by an increase in the allowance for loan losses and a charge to the provision for loan losses. If the present value of expected cash flows for a pool is greater than its carrying value, any previously established allowance for loan losses is reversed and any remaining difference increases the accretable yield which will be taken into interest income over the remaining life of the loan pool. Acquired impaired loans are generally not subject to individual evaluation for impairment and are not reported with impaired loans, even if they would otherwise qualify for such treatment. Purchased performing loans are recorded at fair value, including a credit discount. Credit losses on acquired performing loans are estimated based on analysis of the performing portfolio. Such estimated credit losses are recorded as nonaccretable discounts in a manner similar to purchased impaired loans. The fair value discount other than for credit loss is accreted as an adjustment to yield over the estimated lives of the loans. A provision for loan losses is recorded for any deterioration in these loans subsequent to the acquisition. Allowance for Loan Losses: The allowance for loan losses is established as losses are estimated to have occurred through a provision for loan losses charged to expense. Loan losses are charged against the allowance when management believes the uncollectibility of a loan balance is confirmed. Confirmed losses are charged off immediately. Subsequent recoveries, if any, are credited to the allowance. The allowance is an amount that management believes will be adequate to absorb estimated losses relating to specifically identified loans, as well as probable credit losses inherent in the balance of the loan portfolio. The allowance for loan losses is evaluated on a regular basis by management and is based upon management's periodic review of the uncollectibility of loans in light of historical experience, the nature and volume of the loan portfolio, overall portfolio quality, review of specific problem loans, current economic conditions that may affect the borrower's ability to pay, estimated value of any underlying collateral and prevailing economic conditions. This evaluation is inherently subjective as it requires estimates that are susceptible to significant revision as more information becomes available. This evaluation does not include the effects of expected losses on specific loans or groups of loans that are related to future events or expected changes in economic conditions. While management uses the best information available to make its evaluation, future adjustments to the allowance may be necessary if there are significant changes in economic conditions. In addition, regulatory agencies, as an integral part of their examination process, periodically review the Company's allowance for loan losses, and may require the Company to make additions to the allowance based on their judgment about information available to them at the time of their examinations. The allowance consists of specific and general components. The specific component relates to loans that are classified as impaired. For impaired loans, an allowance is established when the discounted cash flows, collateral value, or observable market price of the impaired loan is lower than the carrying value of that loan. The general component covers non-impaired loans and is based on the Company's historical loss experience adjusted for other qualitative factors. Other adjustments may be made to the allowance for pools of loans after an assessment of internal or external influences on credit quality that are not fully reflected in the historical loss or risk rating data. Allowance for Loan Losses (continued): An unallocated component may be maintained to cover uncertainties that could affect management's estimate of probable losses. The unallocated component of the allowance reflects the margin of imprecision inherent in the underlying assumptions used in the methodologies for estimating specific and general losses in the portfolio. As part of the risk management program, an independent review is performed on the loan portfolio, which supplements management’s assessment of the loan portfolio and the allowance for loan losses. The result of the independent review is reported directly to the Audit Committee of the Board of Directors. Loans, for which the terms have been modified at the borrower's request, and for which the borrower is experiencing financial difficulties, are considered troubled debt restructurings and classified as impaired. A loan is considered impaired when it is probable, based on current information and events, the Company will be unable to collect all principal and interest payments due in accordance with 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 when due. Loans that experience insignificant payment delays and payment shortfalls are not classified as impaired. Impaired loans are measured 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. Interest on accruing impaired loans is recognized as long as such loans do not meet the criteria for nonaccrual status. Large groups of smaller balance homogeneous loans are collectively evaluated for impairment. The Company's homogeneous loan pools include consumer real estate loans, commercial real estate loans, construction and land development loans, commercial and industrial loans, and consumer and other loans. The general allocations to these loan pools are based on the historical loss rates for specific loan types and the internal risk grade, if applicable, adjusted for both internal and external qualitative risk factors. The qualitative factors considered by management include, among other factors, (1) changes in local and national economic conditions; (2) changes in asset quality; (3) changes in loan portfolio volume; (4) the composition and concentrations of credit; (5) the impact of competition on loan structuring and pricing; (6) the impact of interest rate changes on portfolio risk and (7) effectiveness of the Company's loan policies, procedures and internal controls. The total allowance established for each homogeneous loan pool represents the product of the historical loss ratio adjusted for qualitative factors and the total dollar amount of the loans in the pool. Troubled Debt Restructurings: The Company designates loan modifications as Troubled Debt Restructurings ("TDRs") when for economic and legal reasons related to the borrower's financial difficulties, it grants a concession to the borrower that it would not otherwise consider. TDRs can involve loans remaining on nonaccrual, moving to nonaccrual, or continuing on accrual status, depending on the individual facts and circumstances of the borrower. In circumstances where the TDR involves charging off a portion of the loan balance, the Company typically classifies these restructurings as nonaccrual. In connection with restructurings, the decision to maintain a loan that has been restructured on accrual status is based on a current, well documented credit evaluation of the borrower's financial condition and prospects for repayment under the modified terms. This evaluation includes consideration of the borrower's current capacity to pay, which among other things may include a review of the borrower's current financial statements, an analysis of global cash flow sufficient to pay all debt obligations, a debt to income analysis, and an evaluation of secondary sources of payment from the borrower and any guarantors. This evaluation also includes an evaluation of the borrower's current willingness to pay, which may include a review of past payment history, an evaluation of the borrower's willingness to provide information on a timely basis, and consideration of offers from the borrower to provide additional collateral or guarantor support. The credit evaluation also reflects consideration of the borrower's future capacity and willingness to pay, which may include evaluation of cash flow projections, consideration of the adequacy of collateral to cover all principal and interest, and trends indicating improving profitability and collectability of receivables. Restructured nonaccrual loans may be returned to accrual status based on a current, well-documented credit evaluation of the borrower's financial condition and prospects for repayment under the modified terms. This evaluation must include consideration of the borrower's sustained historical repayment for a reasonable period, generally a minimum of six months, prior to the date on which the loan is returned to accrual status. Foreclosed Assets: Foreclosed assets acquired through, or in lieu of, loan foreclosure are held for sale and are initially recorded at fair value less selling costs. Any write-down to fair value at the time of transfer to foreclosed assets is charged to the allowance for loan losses. Subsequent to foreclosure, valuations are periodically performed by management and the assets are carried at the lower of carrying amount or fair value less costs to sell. Costs of improvements are capitalized, whereas costs relating to holding foreclosed assets and subsequent write-downs to the value are expensed. The amount of residential real estate where physical possession had been obtained included within foreclosed assets at December 31, 2018 and 2017 was $400 thousand and $546 thousand , respectively. There was no residential real estate in process of foreclosure at December 31, 2018 and December 31, 2017 . Premises and Equipment: Land is carried at cost. Premises and equipment are carried at cost less accumulated depreciation computed on the straight-line method over the estimated useful lives of the assets or the expected terms of the leases, if shorter. Expected terms include lease option periods to the extent that the exercise of such options is reasonably assured. Maintenance and repairs are expensed as incurred while major additions and improvements are capitalized. Gains and losses on dispositions are included in current operations. Buildings and leasehold improvements 15 - 40 years Furniture and equipment 3-7 years Goodwill and Intangible Assets: Goodwill represents the cost in excess of the fair value of net assets acquired (including identifiable intangibles) in transactions accounted for as business combinations. Goodwill has an indefinite useful life and is evaluated for impairment annually, or more frequently if events and circumstances indicate that the asset might be impaired. FASB ASC 350, Goodwill and Other , regarding testing goodwill for impairment provides an entity the option to first perform a qualitative assessment to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If an entity does a qualitative assessment and determines that this is the case, or if a qualitative assessment is not performed, it is required to perform additional goodwill impairment testing to identify potential goodwill impairment and measure the amount of goodwill impairment loss to be recognized for that reporting unit (if any). Based on a qualitative assessment, if an entity determines that the fair value of a reporting unit is more than its carrying amount, the two-step goodwill impairment test is not required. The Company performs its annual goodwill impairment test as of December 31 of each year. For 2018 , the results of the qualitative assessment provided no indication of potential impairment. Goodwill will continue to be monitored for triggering events that may indicate impairment prior to the next scheduled annual impairment test. Intangible assets consist of core deposit premiums created as a result of Business Combinations by the Company or Bank where deposits are assumed. The core deposit premium is initially recognized based on a valuation performed as of the consummation date. The core deposit premium is amortized over the average remaining life of the acquired customer deposits. Amortization expense relating to these intangible assets was $976 thousand and $346 thousand for the years ended December 31, 2018 and 2017 , respectively. The intangible assets were evaluated for impairment as of December 31, 2018 , and based on that evaluation it was determined that there was no impairment. Transfer 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 (1) the assets have been isolated from the Company - put presumptively beyond the reach of the transferor and its creditors, even in bankruptcy or other receivership, (2) 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 (3) the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity or the ability to unilaterally cause the holder to return specific assets. Derivative Instruments: In accordance with ASC Topic 815, Derivatives and Hedging, all derivative instruments are recorded on the accompanying consolidated balance sheet at their respective fair values. The accounting for changes in fair value (i.e., gains or losses) of a derivative instrument depends on whether it has been designated and qualifies as part of a hedging relationship. If the derivative instrument is not designated as a hedge, changes in the fair value of the derivative instrument are recognized in earnings in the period of change. For derivative instruments that are designated and qualify as a fair value hedge, the gain or loss on the derivative instrument as well as the offsetting loss or gain on the hedged asset or liability attributable to the hedged risk are recognized in current earnings. The gain or loss on the derivative instrument is presented on the same income statement line item as the earnings effect of the hedged item. Advertising Costs: The Company expenses all advertising costs as incurred. Advertising expense was $873 thousand and $638 thousand for the years ended December 31, 2018 and 2017 , respectively. Income Taxes: The income tax accounting guidance results in two components of income tax expense: current and deferred. Current income tax expense reflects taxes to be paid or refunded for the current period by applying the provisions of the enacted tax law to the taxable income or excess of deductions over revenues. The Company determines deferred income taxes using the liability (or balance sheet) method. Under this method, the net deferred tax asset or liability is based on the tax effects of the differences between the book and tax bases of assets and liabilities, and enacted changes in tax rates and laws are recognized in the period in which they occur. Deferred income tax expense results from changes in deferred tax assets and liabilities between periods. Deferred tax assets are recognized if it is more likely than not, based on the technical merits, that the tax position will be realized or sustained upon examination. The term more likely than not means a likelihood of more than 50 percent; the terms examined and upon examination also include resolution of the related appeals or litigation processes, if any. A tax position that meets the more-likely-than-not recognition threshold is initially and subsequently measured as the largest amount of tax benefit that has a greater than 50 percent likelihood of being realized upon settlement with a taxing authority that has full knowledge of all relevant information. The determination of whether or not a tax position has met the more-likely-than-not recognition threshold considers the facts, circumstances, and information available at the reporting date and is subject to management's judgment. Deferred tax assets may be reduced by deferred tax liabilities and a valuation allowance if, based on the weight of evidence available, it is more likely than not that some portion or all of a deferred tax asset will not be realized. On December 22, 2017, the Tax Cuts and Jobs Act (TCJA) was signed into law by the President of the United States. TCJA is a tax reform act that among other things, reduced corporate tax rates to 21 percent effective January 1, 2018. FASB ASC 740, Income Taxes , requires deferred tax assets and liabilities to be adjusted for the effect of a change in tax laws or rates in the year of enactment, which is the year in which the change was signed into law. Accordingly, the Company adjusted its deferred tax assets and liabilities at December 31, 2017, using the new corporate tax rate of 21 percent. See Note 8. Stock Compensation Plans: At December 31, 2018 , the Company had options outstanding under stock-based compensation plans, which are described in more detail in Note 11. The plans have been accounted for under the accounting guidance (FASB ASC 718, Compensation - Stock Compensation) which requires that the compensation cost relating to share-based payment transactions be recognized in financial statements. That cost will be measured based on the grant date fair value of the equity or liability instruments issued. The stock compensation accounting guidance covers a wide range of share-based compensation arrangements including stock options, restricted share plans, performance-based awards, share appreciation rights, and stock or other stock based awards. Stock Compensation Plans(continued): The stock compensation accounting guidance requires that compensation cost for all stock awards be calculated and recognized over the employees' service period, generally defined as the vesting period. For awards with graded-vesting, compensation cost is recognized on a straight-line basis over the requisite service period for the entire award. A Black-Scholes model is used to estimate the fair value of stock options, while the market value of the Company's common stock at the date of grant is used for restrictive stock awards and stock grants. Employee Benefit Plan: Employee benefit plan costs are based on the percentage of individual employee's salary, not to exceed the amount that can be deducted for federal income tax purposes. Variable Interest Entities: An entity is referred to as a variable interest entity (VIE) if it meets the criteria outlined in ASC Topic 810, which are: (1) the entity has equity that is insufficient to permit the entity to finance its activities without additional subordinated financial support from other parties or (2) the entity has equity investors that cannot make significant decisions about the entity's operations or that do not absorb the expected losses or receive the expected returns of the entity. A VIE must be consolidated by the Company if it is deemed to be the primary beneficiary of the VIE, which is the party involved with the VIE that has a majority of the expected losses, expected residual returns, or both. At December 31, 2017, the Company had an investment in Community Advantage Fund, LLC that qualified as an unconsolidated VIE. The Company’s investment in a partnership consists of an equity interest in a lending partnership for the purposes of loaning funds to an unrelated entity. This entity will use the funds to make loans through the SBA Community Advantage Loan Initiative. The Company uses the equity method when it owns an interest in a partnership and can exert significant influence over the partnership’s operations. Under the equity method, the Company’s ownership interest in the partnership’s capital is reported as an investment on its consolidated balance sheets in other assets and the Company’s allocable share of the income or loss from the partnership is reported in noninterest income or expense in the consolidated statements of income. The Company ceases recording losses on an investment in partnership when the cumulative losses and distributions from the partnership exceed the carrying amount of the investment and any advances made by the Company. After the Company’s investment in such partnership reaches zero, cash distributions received from these investments are recorded as 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. Unrealized gains and losses on available for sale securities are the only component of accumulated other comprehensive loss. Fair Value of Financial Instruments: Fair values of financial instruments are estimates using relevant market information and other assumptions, as more fully disclosed in Note 16. Fair value estimates involve uncertainties and matters of significant judgment. Changes in assumptions or in market conditions could significantly affect the estimates. Business Combinations: Business combinations are accounted for using the acquisition method of accounting. Under the acquisition method of accounting, acquired assets and assumed liabilities are included with the acquirer's accounts as of the date of acquisition at estimated fair value, with any excess of purchase price over the fair value of the net assets acquired (including identifiable intangible assets) capitalized as goodwill. In the event that the fair value of the net assets acquired exceeds the purchase price, an acquisition gain is recorded for the difference in consolidated statements of income for the period in which the acquisition occurred. An intangible asset is recognized as an asset apart from goodwill when it arises from contractual or other legal rights or if it is capable of being separated or divided from the acquired entity and sold, transferred, licensed, rented or exchang

Business Combinations

Business Combinations	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Business Combinations	On December 8, 2016, the Bank entered into a purchase and assumption agreement with Atlantic Capital Bank, N.A. that provided for the acquisition and assumption by the Bank of certain assets and liabilities associated with Atlantic Capital Bank’s branch office located at 3200 Keith Street NW, Cleveland, Tennessee 37312. The purchase was completed on May 19, 2017 for total cash consideration of $1.2 million . The assets and liabilities as of the effective date of the transaction were recorded at their respective estimated fair values. The excess of the purchase price over the net estimated fair values of the acquired assets and liabilities was allocated to identifiable intangible assets with the remaining excess allocated to goodwill. In the periods following the acquisition, the financial statements will include the results attributable to the Cleveland branch purchase beginning on the date of purchase. For the twelve months period ended December 31, 2018, the revenues and net income attributable to the Cleveland branch were $ 1.6 million and $ 546 thousand , respectively. For the twelve months period ended December 31, 2017, the revenues and net income attributable to the Cleveland branch were $903 thousand and $63 thousand, respectively. It is impracticable to determine the pro-forma impact to the 2017 revenues and net income if the acquisition had occurred on January 1, 2017 as the Company does not have access to those records for a single branch. The following table details the financial impact of the transaction, including the allocation of the purchase price to the fair values of net assets assumed and goodwill recognized: Allocation of Purchase Price (in thousands) Total consideration in cash $ 1,183 Fair value of assets acquired and liabilities assumed: Cash and cash equivalents 133 Loans 24,073 Premises and equipment 2,839 Core deposit intangible 310 Prepaid and other assets 77 Deposits (26,888 ) Payables and other liabilities (21 ) Total fair value of net assets acquired 523 Goodwill $ 660 As of December 31, 2018 there have not been any changes to the initial fair values recorded as part of the business combination.

Securities

Securities	12 Months Ended
	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Securities	Securities The amortized cost and fair value of securities available-for-sale at December 31, 2018 and 2017 are summarized as follow (in thousands): December 31, 2018 Amortized Gross Gross Fair U.S. Government-sponsored enterprises (GSEs) $ 44,117 $ 12 $ (626 ) $ 43,503 Municipal securities 55,248 276 (363 ) 55,161 Other debt securities 977 — (67 ) 910 Mortgage-backed securities 103,875 153 (1,914 ) 102,114 Total $ 204,217 $ 441 $ (2,970 ) $ 201,688 December 31, 2017 Amortized Gross Gross Fair U.S. Government-sponsored enterprises (GSEs) $ 26,207 $ 1 $ (432 ) $ 25,776 Municipal securities 9,122 28 (147 ) 9,003 Other debt securities 974 — (24 ) 950 Mortgage-backed securities 117,263 136 (1,184 ) 116,215 Total $ 153,566 $ 165 $ (1,787 ) $ 151,944 The amortized cost and estimated market value of securities at December 31, 2018 , by contractual maturity, are shown below (in thousands). Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Amortized Fair Due in one year or less $ — $ — Due from one year to five years 36,112 35,780 Due from five years to ten years 14,588 14,145 Due after ten years 49,642 49,649 100,342 99,574 Mortgage-backed securities 103,875 102,114 Total $ 204,217 $ 201,688 The following tables present the gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities available-for-sale have been in a continuous unrealized loss position, as of December 31, 2018 and 2017 (in thousands): As of December 31, 2018 Less than 12 Months 12 Months or Greater Total Fair Gross Fair Gross Fair Gross U.S. Government- sponsored enterprises (GSEs) $ 14,763 $ (237 ) $ 13,728 $ (389 ) $ 28,491 $ (626 ) Municipal securities 16,455 (150 ) 4,767 (213 ) 21,222 (363 ) Other debt securities — — 910 (67 ) 910 (67 ) Mortgage-backed securities 10,516 (155 ) 69,884 (1,759 ) 80,400 (1,914 ) Total $ 41,734 $ (542 ) $ 89,289 $ (2,428 ) $ 131,023 $ (2,970 ) As of December 31, 2017 Less than 12 Months 12 Months or Greater Total Fair Gross Fair Gross Fair Gross U.S. Government- sponsored enterprises (GSEs) $ 1,358 $ (1 ) $ 13,420 $ (431 ) $ 14,778 $ (432 ) Municipal securities 3,418 (43 ) 2,112 (104 ) 5,530 (147 ) Other debt securities 950 (24 ) — — 950 (24 ) Mortgage-backed securities 61,332 (407 ) 35,048 (777 ) 96,380 (1,184 ) Total $ 67,058 $ (475 ) $ 50,580 $ (1,312 ) $ 117,638 $ (1,787 ) At December 31, 2018 , the categories of temporarily impaired securities, and management’s evaluation of those securities, are as follows: U.S. Government-sponsored enterprises: At December 31, 2018 , eight investments in U.S. GSE securities had unrealized losses. These unrealized losses related principally to changes in market interest rates. The contractual terms of the investments does not permit the issuer to settle the securities at a price less than the amortized cost bases of the investments. Because the Bank does not intend to sell the investments and it is more likely than not that the Bank will not be required to sell the investments before recovery of their amortized cost bases, which may be maturity, the Bank does not consider these investments to be other-than temporarily impaired at December 31, 2018 . Municipal securities: At December 31, 2018 , twenty two investments in obligations of municipal securities had unrealized losses. The Bank believes the unrealized losses on those investments were caused by the interest rate environment and do not relate to the underlying credit quality of the issuers. Because the Bank does not intend to sell the investments and it is not more likely than not that the Bank will be required to sell the investments before recovery of their amortized cost bases, which may be maturity, the Bank does not consider these investments to be other than temporarily impaired at December 31, 2018 . Other debt securities: At December 31, 2018 , one investment in other debt securities had unrealized losses. The Bank believes the unrealized losses on this investment was caused by the interest rate environment and does not relate to the underlying credit quality of the issuers. Because the Bank does not intend to sell the investment and it is not more likely than not that the Bank will be required to sell the investment before recovery of their amortized cost basis, which may be maturity, the Bank does not consider this investment to be other than temporarily impaired at December 31, 2018 . Mortgage-backed securities: At December 31, 2018 , sixty six investments in residential mortgage-backed securities had unrealized losses. This impairment is believed to be caused by the current interest rate environment. The contractual cash flows of those investments are guaranteed by an agency of the U.S. Government. Because the decline in market value is attributable to the current interest rate environment and not credit quality, and because the Bank does not intend to sell the investments and it is not more likely than not that the Bank will be required to sell the investments before recovery of their amortized cost bases, which may be maturity, the Bank does not consider these investments to be other than temporarily impaired at December 31, 2018 . Sales of available-for-sale securities for the years ended December 31, 2018 and 2017 , were as follows (in thousands): 2018 2017 Proceeds $ 2,970 $ 12,614 Gains realized 1 145 Losses realized — 2 Securities with a carrying value of $103.7 million and $97.2 million at December 31, 2018 and 2017 , respectively, were pledged to secure various deposits, securities sold under agreements to repurchase, as collateral for federal funds purchased from other financial institutions and serve as collateral for borrowings at the Federal Home Loan Bank.

Loans and Allowance for Loan Lo

Loans and Allowance for Loan Losses	12 Months Ended
	Dec. 31, 2018
Receivables [Abstract]
Loans and Allowance for Loan Losses	Portfolio Segmentation: At December 31, 2018 and 2017 , loans consisted of the following (in thousands): December 31, 2018 December 31, 2017 PCI All Other Total PCI All Other Total Commercial real estate $ 17,682 $ 842,345 $ 860,027 $ 17,903 $ 625,085 $ 642,988 Consumer real estate 8,712 398,542 407,254 7,450 286,007 293,457 Construction and land development 4,602 183,293 187,895 5,120 130,289 135,409 Commercial and industrial 2,557 305,697 308,254 858 237,229 238,087 Consumer and other 605 13,204 13,809 1,463 11,854 13,317 Total loans 34,158 1,743,081 1,777,239 32,794 1,290,464 1,323,258 Less: Allowance for loan losses — (8,275 ) (8,275 ) (16 ) (5,844 ) (5,860 ) Loans, net $ 34,158 $ 1,734,806 $ 1,768,964 $ 32,778 $ 1,284,620 $ 1,317,398 For purposes of the disclosures required pursuant to the adoption of ASC 310, the loan portfolio was disaggregated into segments. A portfolio segment is defined as the level at which an entity develops and documents a systematic method for determining its allowance for credit losses. There are five loan portfolio segments that include commercial real estate, consumer real estate, construction and land development, commercial and industrial, and consumer and other. The following describe risk characteristics relevant to each of the portfolio segments: Commercial Real Estate: Commercial real estate loans include owner-occupied commercial real estate loans and loans secured by income-producing properties. Owner-occupied commercial real estate loans to operating businesses are long-term financing of land and buildings. These loans are repaid by cash flow generated from the business operation. Real estate loans for income-producing properties such as apartment buildings, office and industrial buildings, and retail shopping centers are repaid from rent income derived from the properties. Loans within this portfolio segment are particularly sensitive to the valuation of real estate. Consumer Real Estate: Consumer real estate loans include real estate loans secured by first liens, second liens, or open end real estate loans, such as home equity lines. These are repaid by various means such as a borrower's income, sale of the property, or rental income derived from the property. One to four family first mortgage loans are repaid by various means such as a borrower's income, sale of the property, or rental income derived from the property. Loans within this portfolio segment are particularly sensitive to the valuation of real estate. Construction and Land Development: Loans for real estate construction and development are repaid through cash flow related to the operations, sale or refinance of the underlying property. This portfolio segment includes extensions of credit to real estate developers or investors where repayment is dependent on the sale of the real estate or income generated from the real estate collateral. Loans within this portfolio segment are particularly sensitive to the valuation of real estate. Commercial and Industrial: The commercial and industrial loan portfolio segment includes commercial, financial, and agricultural loans. These loans include those loans to commercial customers for use in normal business operations to finance working capital needs, equipment purchases, or expansion projects. Loans are repaid by business cash flows. Collection risk in this portfolio is driven by the creditworthiness of the underlying borrower, particularly cash flows from the customers' business operations. Consumer and Other: The consumer loan portfolio segment includes direct consumer installment loans, overdrafts and other revolving credit loans, and educational loans. Loans in this portfolio are sensitive to unemployment and other key consumer economic measures. Credit Risk Management: The Company employs a credit risk management process with defined policies, accountability and routine reporting to manage credit risk in the loan portfolio segments. Credit risk management is guided by credit policies that provide for a consistent and prudent approach to underwriting and approvals of credits. Within the Credit Policy, procedures exist that elevate the approval requirements as credits become larger and more complex. All loans are individually underwritten, risk-rated, approved, and monitored. Responsibility and accountability for adherence to underwriting policies and accurate risk ratings lies in each portfolio segment. For the consumer real estate and consumer and other portfolio segments, the risk management process focuses on managing customers who become delinquent in their payments. For the other portfolio segments, the risk management process focuses on underwriting new business and, on an ongoing basis, monitoring the credit of the portfolios, including a third party review of the largest credits on an annual basis or more frequently as needed. To ensure problem credits are identified on a timely basis, several specific portfolio reviews occur periodically to assess the larger adversely rated credits for proper risk rating and accrual status. Credit quality and trends in the loan portfolio segments are measured and monitored regularly. Detailed reports, by product, collateral, accrual status, etc., are reviewed by the Senior Credit Officer and the Directors Loan Committee. The allowance for loan losses is a valuation reserve allowance established through provisions for loan losses charged against income. The allowance for loan losses, which is evaluated quarterly, is maintained at a level that management deems sufficient to absorb probable losses inherent in the loan portfolio. Loans deemed to be uncollectible are charged against the allowance for loan losses, while recoveries of previously charged-off amounts are credited to the allowance for loan losses. The allowance for loan losses is comprised of specific valuation allowances for loans evaluated individually for impairment and general allocations for pools of homogeneous loans with similar risk characteristics and trends. The allowance for loan losses related to specific loans is based on management's estimate of potential losses on impaired loans as determined by (1) the present value of expected future cash flows; (2) the fair value of collateral if the loan is determined to be collateral dependent or (3) the loan's observable market price. The Company's homogeneous loan pools include commercial real estate loans, consumer real estate loans, construction and land development loans, commercial and industrial loans, and consumer and other loans. The general allocations to these loan pools are based on the historical loss rates for specific loan types and the internal risk grade, if applicable, adjusted for both internal and external qualitative risk factors. The qualitative factors considered by management include, among other factors, (1) changes in local and national economic conditions; (2) changes in asset quality; (3) changes in loan portfolio volume; (4) the composition and concentrations of credit; (5) the impact of competition on loan structuring and pricing; (6) the impact of interest rate changes on portfolio risk and (7) effectiveness of the Company's loan policies, procedures and internal controls. The total allowance established for each homogeneous loan pool represents the product of the historical loss ratio adjusted for qualitative factors and the total dollar amount of the loans in the pool. The determination of the adequacy of the allowance for loan losses is based on estimates that are particularly susceptible to significant changes in the economic environment and market conditions. In connection with the determination of the estimated losses on loans, management obtains independent appraisals for significant collateral. The Company's loans are generally secured by specific items of collateral including real property, consumer assets, and business assets. Although the Company has a diversified loan portfolio, a substantial portion of its debtors' ability to honor their contracts is dependent on local economic conditions. While management uses available information to recognize losses on loans, further reductions in the carrying amounts of loans may be necessary based on changes in local economic conditions. In addition, regulatory agencies, as an integral part of their examination process, periodically review the estimated losses on loans. Such agencies may require the Company to recognize additional losses based on their judgments about information available to them at the time of their examination. Because of these factors, it is reasonably possible that the estimated losses on loans may change materially in the near term. Credit Risk Management (continued): The composition of loans by loan classification for impaired and performing loan status at December 31, 2018 and 2017 , is summarized in the tables below (amounts in thousands): December 31, 2018 Commercial Consumer Construction Commercial Consumer Total Performing loans $ 841,709 $ 397,306 $ 182,746 $ 304,673 $ 13,088 $ 1,739,522 Impaired loans 636 1,236 547 1,024 116 3,559 842,345 398,542 183,293 305,697 13,204 1,743,081 PCI loans 17,682 8,712 4,602 2,557 605 34,158 Total $ 860,027 $ 407,254 $ 187,895 $ 308,254 $ 13,809 $ 1,777,239 December 31, 2017 Commercial Consumer Construction Commercial Consumer Total Performing loans $ 624,638 $ 284,585 $ 129,742 $ 237,016 $ 11,842 $ 1,287,823 Impaired loans 447 1,422 547 213 12 2,641 625,085 286,007 130,289 237,229 11,854 1,290,464 PCI loans 17,903 7,450 5,120 858 1,463 32,794 Total loans $ 642,988 $ 293,457 $ 135,409 $ 238,087 $ 13,317 $ 1,323,258 The following tables show the allowance for loan losses allocation by loan classification for impaired and performing loans as of December 31, 2018 and 2017 (amounts in thousands): December 31, 2018 Construction Commercial Consumer Commercial Consumer and Land and and Real Estate Real Estate Development Industrial Other Total Performing loans $ 3,639 $ 1,763 $ 795 $ 1,304 $ 240 $ 7,741 PCI loans — — — — — — Impaired loans — 26 — 442 66 534 Total $ 3,639 $ 1,789 $ 795 $ 1,746 $ 306 $ 8,275 Credit Risk Management (continued): December 31, 2017 Construction Commercial Consumer Commercial Consumer and Land and and Real Estate Real Estate Development Industrial Other Total Performing loans $ 2,444 $ 1,340 $ 521 $ 890 $ 204 $ 5,399 PCI Loans 16 — — — — 16 Impaired loans 5 256 — 172 12 445 Total $ 2,465 $ 1,596 $ 521 $ 1,062 $ 216 $ 5,860 The following tables detail the changes in the allowance for loan losses for the year ending December 31, 2018 and December 31, 2017 , by loan classification (amounts in thousands): December 31, 2018 Commercial Consumer Construction Commercial Consumer Total Beginning balance $ 2,465 $ 1,596 $ 521 $ 1,062 $ 216 $ 5,860 Loans charged off (38 ) (275 ) — (177 ) (370 ) (860 ) Recoveries of loans charged off 2 100 9 72 156 339 Provision (reallocation) charged to operating expense 1,210 368 265 789 304 2,936 Ending balance $ 3,639 $ 1,789 $ 795 $ 1,746 $ 306 $ 8,275 December 31, 2017 Commercial Consumer Construction Commercial Consumer Total Beginning balance $ 2,369 $ 1,382 $ 717 $ 520 $ 117 $ 5,105 Loans charged off — (111 ) — (24 ) (141 ) (276 ) Recoveries of loans charged off 8 99 13 67 61 248 Provision (reallocation) charged to operating expense 88 226 (209 ) 499 179 783 Ending balance $ 2,465 $ 1,596 $ 521 $ 1,062 $ 216 $ 5,860 Credit Risk Management (continued): A description of the general characteristics of the risk grades used by the Company is as follows: Pass: Loans in this risk category involve borrowers of acceptable-to-strong credit quality and risk who have the apparent ability to satisfy their loan obligations. Loans in this risk grade would possess sufficient mitigating factors, such as adequate collateral or strong guarantors possessing the capacity to repay the debt if required, for any weakness that may exist. Watch: Loans in this risk category involve borrowers that exhibit characteristics, or are operating under conditions that, if not successfully mitigated as planned, have a reasonable risk of resulting in a downgrade within the next six to twelve months. Loans may remain in this risk category for six months and then are either upgraded or downgraded upon subsequent evaluation. Special Mention: Loans in this risk grade are the equivalent of the regulatory definition of "Other Assets Especially Mentioned" classification. Loans in this category possess some credit deficiency or potential weakness, which requires a high level of management attention. Potential weaknesses include declining trends in operating earnings and cash flows and /or reliance on the secondary source of repayment. If left uncorrected, these potential weaknesses may result in noticeable deterioration of the repayment prospects for the asset or in the Company's credit position. Substandard: Loans in this risk grade are inadequately protected by the borrower's current financial condition and payment capability or of the collateral pledged, if any. Loans so classified have a well-defined weakness or weaknesses that jeopardize the orderly repayment of debt. They are characterized by the distinct possibility that the Company will sustain some loss if the deficiencies are not corrected. Doubtful: Loans in this risk grade have all the weaknesses inherent in those classified as substandard, with the added characteristic that the weaknesses make collection or orderly repayment in full, on the basis of current existing facts, conditions and values, highly questionable and improbable. Possibility of loss is extremely high, but because of certain important and reasonably specific factors that may work to the advantage and strengthening of the exposure, its classification as an estimated loss is deferred until its more exact status may be determined. Uncollectible: Loans in this risk grade are considered to be non-collectible and of such little value that their continuance as bankable assets is not warranted. This does not mean the loan has absolutely no recovery value, but rather it is neither practical nor desirable to defer writing off the loan, even though partial recovery may be obtained in the future. Charge-offs against the allowance for loan losses are taken in the period in which the loan becomes uncollectible. Consequently, the Company typically does not maintain a recorded investment in loans within this category. The following tables outline the amount of each loan classification and the amount categorized into each risk rating as of December 31, 2018 and 2017 (amounts in thousands): Non PCI Loans December 31, 2018 Commercial Consumer Construction Commercial Consumer Total Pass $ 834,912 $ 394,728 $ 182,524 $ 303,805 $ 12,927 $ 1,728,896 Watch 6,791 2,678 64 1,090 135 10,758 Special mention — 14 158 137 — 309 Substandard 642 1,122 547 462 142 2,915 Doubtful — — — 203 — 203 Total $ 842,345 $ 398,542 $ 183,293 $ 305,697 $ 13,204 $ 1,743,081 Credit Risk Management (continued): PCI Loans December 31, 2018 Commercial Consumer Construction Commercial Consumer Total Pass $ 14,050 $ 5,617 $ 4,033 $ 2,382 $ 541 $ 26,623 Watch 1,805 756 569 — 17 3,147 Special mention 1,030 446 — 50 10 1,536 Substandard 797 1,893 — 125 37 2,852 Doubtful — — — — — — Total $ 17,682 $ 8,712 $ 4,602 $ 2,557 $ 605 $ 34,158 Total loans $ 860,027 $ 407,254 $ 187,895 $ 308,254 $ 13,809 $ 1,777,239 Non PCI Loans December 31, 2017 Commercial Consumer Construction Commercial Consumer Total Pass $ 616,028 $ 279,464 $ 129,359 $ 233,942 $ 11,624 $ 1,270,417 Watch 7,673 2,543 383 3,007 62 13,668 Special mention 1,006 2,627 — 64 155 3,852 Substandard 378 1,159 547 157 — 2,241 Doubtful — 214 — 59 13 286 Total $ 625,085 $ 286,007 $ 130,289 $ 237,229 $ 11,854 $ 1,290,464 PCI Loans December 31, 2017 Commercial Consumer Construction Commercial Consumer Total Pass $ 14,386 $ 4,151 $ 4,134 $ 68 $ 819 $ 23,558 Watch 261 1,345 649 120 262 2,637 Special mention — 456 — 58 24 538 Substandard 3,084 1,192 337 588 107 5,308 Doubtful 172 306 — 24 251 753 Total $ 17,903 $ 7,450 $ 5,120 $ 858 $ 1,463 $ 32,794 Total loans $ 642,988 $ 293,457 $ 135,409 $ 238,087 $ 13,317 $ 1,323,258 Past Due Loans: A loan is considered past due if any required principal and interest payments have not been received as of the date such payments were required to be made under the terms of the loan agreement. Generally, management places a loan on nonaccrual when there is a clear indication that the borrower’s cash flow may not be sufficient to meet payments as they become due, which is generally when a loan is 90 days past due. The following tables present the aging of the recorded investment in loans and leases as of December 31, 2018 and 2017 (amounts in thousands): December 31, 2018 30-59 Days 60-89 Days Past Due and Accruing Past Due 90 Nonaccrual Total PCI Loans Current Total Commercial real estate $ 377 $ 19 $ — $ 272 $ 668 $ 17,682 $ 841,677 $ 860,027 Consumer real estate 1,168 462 454 844 2,928 8,712 395,614 407,254 Construction and land development 343 — — 547 890 4,602 182,403 187,895 Commercial and industrial 155 — 101 909 1,165 2,557 304,532 308,254 Consumer and other 117 — 29 124 270 605 12,934 13,809 Total $ 2,160 $ 481 $ 584 $ 2,696 $ 5,921 $ 34,158 $ 1,737,160 $ 1,777,239 December 31, 2017 30-59 Days 60-89 Days Past Due and Accruing Past Due 90 Nonaccrual Total PCI Current Total Commercial real estate $ 517 $ — $ 728 $ 128 $ 1,373 $ 17,903 $ 623,712 $ 642,988 Consumer real estate 769 194 33 991 1,987 7,450 284,020 293,457 Construction and land development 65 — 326 547 938 5,120 129,351 135,409 Commercial and industrial 86 200 131 85 502 858 236,727 238,087 Consumer and other 109 56 291 13 469 1,463 11,385 13,317 Total $ 1,546 $ 450 $ 1,509 $ 1,764 $ 5,269 $ 32,794 $ 1,285,195 $ 1,323,258 Impaired Loans: A loan held for investment is considered impaired when, based on current information and events, it is probable that the Company will be unable to collect all amounts due (both principal and interest) according to the terms of the loan agreement. The following is an analysis of the impaired loan portfolio detailing the related allowance recorded as of and for the years ended December 31, 2018 and 2017 (amounts in thousands): For the year ended At December 31, 2018 December 31, 2018 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized Impaired loans without a valuation allowance: Non PCI Loans: Commercial real estate $ 636 $ 648 $ — $ 855 $ 33 Consumer real estate 1,073 1,089 — 934 29 Construction and land development 547 547 — 547 — Commercial and industrial 69 70 — 69 6 Consumer and other 29 33 — 15 3 2,354 2,387 — 2,420 71 PCI loans: None in 2018 Impaired loans with a valuation allowance: Non PCI Loans: Commercial real estate — — — — — Consumer real estate 163 205 26 365 — Construction and land development — — — — — Commercial and industrial 955 973 442 476 37 Consumer and other 87 87 66 86 3 1,205 1,265 534 927 40 PCI loans: Commercial real estate — — — 11 — Total impaired loans $ 3,559 $ 3,652 $ 534 $ 3,358 $ 111 Impaired Loans (continued): For the year ended At December 31, 2017 December 31, 2017 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized Impaired loans without a valuation allowance: Non PCI Loans: Commercial real estate $ 424 $ 454 $ — $ 204 $ 44 Consumer real estate 415 420 — 401 16 Construction and land development 547 547 — 628 — Commercial and industrial 41 41 — 44 3 Consumer and other — — — — — 1,427 1,462 — 1,277 63 PCI loans: None in 2017 Impaired loans with a valuation allowance: Non PCI Loans: Commercial real estate 23 23 5 5 1 Consumer real estate 1,007 1,033 256 601 38 Construction and land development — — — — — Commercial and industrial 172 172 172 117 10 Consumer and other 12 13 12 2 1 1,214 1,241 445 725 50 PCI loans: Commercial real estate 16 123 16 3 16 Total impaired loans $ 2,657 $ 2,826 $ 461 $ 2,005 $ 129 Troubled Debt Restructurings: At December 31, 2018 and 2017 , impaired loans included loans that were classified as Troubled Debt Restructurings ("TDRs"). The restructuring of a loan is considered a TDR if both (i) the borrower is experiencing financial difficulties and (ii) the creditor has granted a concession. In assessing whether or not a borrower is experiencing financial difficulties, the Company considers information currently available regarding the financial condition of the borrower. This information includes, but is not limited to, whether (i) the debtor is currently in payment default on any of its debt; (ii) a payment default is probable in the foreseeable future without the modification; (iii) the debtor has declared or is in the process of declaring bankruptcy; and (iv) the debtor's projected cash flow is sufficient to satisfy contractual payments due under the original terms of the loan without a modification. The Company considers all aspects of the modification to loan terms to determine whether or not a concession has been granted to the borrower. Key factors considered by the Company include the debtor's ability to access funds at a market rate for debt with similar risk characteristics, the significance of the modification relative to unpaid principal balance or collateral value of the debt, and the significance of a delay in the timing of payments relative to the original contractual terms of the loan. Troubled Debt Restructurings (continued): The most common concessions granted by the Company generally include one or more modifications to the terms of the debt, such as (i) a reduction in the interest rate for the remaining life of the debt; (ii) an extension of the maturity date at an interest rate lower than the current market rate for new debt with similar risk; (iii) a temporary period of interest-only payments; and (iv) a reduction in the contractual payment amount for either a short period or remaining term of the loan. As of December 31, 2018 and 2017 , management had approximately $116 thousand and $41 thousand , respectively, in loans that met the criteria for restructured. No restructured loans were on nonaccrual as of December 31, 2018 and 2017. A loan is placed back on accrual status when both principal and interest are current and it is probable that management will be able to collect all amounts due (both principal and interest) according to the terms of the loan agreement. The following table presents a summary of loans that were modified as troubled debt restructurings during the year ended December 31, 2018 (amounts in thousands): December 31, 2018 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Commercial real estate 1 $ 62 $ 62 Commercial and industrial 1 18 18 There were no loans modified as troubled debt restructurings during the year ended December 31, 2017. There were no loans that were modified as troubled debt restructurings during the past twelve months and for which there was a subsequent payment default. Purchased Credit Impaired Loans: The Company has acquired loans which there was, at acquisition, evidence of deterioration of credit quality since origination and it was probable, at acquisition, that all contractually required payments would not be collected. The carrying amount of those loans at for the years ended December 31, 2018 and 2017 is as follows (in thousands): 2018 2017 Commercial real estate $ 24,849 $ 23,366 Consumer real estate 11,108 10,764 Construction and land development 5,731 6,285 Commercial and industrial 5,824 1,452 Consumer and other 892 1,710 Total loans $ 48,404 $ 43,577 Less remaining purchase discount (14,246 ) (10,783 ) Total, gross 34,158 32,794 Less: Allowance for loan losses — (16 ) Carrying amount, net of allowance $ 34,158 $ 32,778 Purchased Credit Impaired Loans (continued): The following is a summary of the accretable discount on acquired loans for the years ended December 31, 2018 and 2017 (in thousands): 2018 2017 Accretable yield, beginning of period $ 9,287 $ 8,950 Additions 2,416 2,581 Accretion income (5,368 ) (4,217 ) Reclassification from nonaccretable 1,494 926 Other changes, net (777 ) 1,047 Accretable yield, end of period $ 7,052 $ 9,287 The Company increased the allowance for loan losses on purchase credit impaired loans in the amount of approximately $16 thousand during the year ended December 31, 2017. There were no allowance for loan losses on purchase credit impaired loans at the year ended December 31, 2018. Purchased credit impaired loans acquired from TN Bancshares during the year ended December 31, 2018 for which it was probable at acquisition that all contractually required payments would not be collected are as follows (in thousands): 2018 Contractual principal and interest at acquisition $ 15,133 Nonaccretable difference 5,302 Expected cash flows at acquisition 9,831 Accretable yield 1,292 Basis in PCI loans at acquisition-estimated fair value $ 8,539 Purchased credit impaired loans acquired from Foothills Bancorp during the year ended December 31, 2018 for which it was probable at acquisition that all contractually required payments would not be collected are as follows (in thousands): 2018 Contractual principal and interest at acquisition $ 12,125 Nonaccretable difference 2,748 Expected cash flows at acquisition 9,377 Accretable yield 1,124 Basis in PCI loans at acquisition-estimated fair value $ 8,253 Related Party Loans: In the ordinary course of business, the Company has granted loans to certain related parties, including directors, executive officers, and their affiliates. The interest rates on these loans were substantially the same as rates prevailing at the time of the transaction and repayment terms are customary for the type of loan. A summary of activity in loans to related parties is as follows (in thousands): 2018 2017 Balance, beginning of year $ 18,330 $ 12,999 Disbursements 34,639 14,533 Repayments (21,723 ) (9,202 ) Balance, end of year $ 31,246 $ 18,330 At December 31, 2018 , the Company had pre-approved but unused lines of credit totaling approximately $4.5 million to related parties.

Premises and Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Premises and Equipment	Premises and Equipment A summary of premises and equipment at December 31, 2018 and 2017 , is as follows (in thousands): 2018 2017 Land and land improvements $ 14,712 $ 10,854 Building and leasehold improvements 36,640 28,576 Furniture, fixtures and equipment 12,318 10,073 Construction in progress 2,875 1,495 Total, gross 66,545 50,998 Accumulated depreciation (10,533 ) (7,998 ) Total, net $ 56,012 $ 43,000 At December 31, 2018 management estimates the cost necessary to complete the construction in progress will be approximately $542 thousand . The Company leases several branch locations and also has two ground leases under non-cancelable operating lease agreements. The leases expire between May 2019 and May 2033. Lease expense under the leases was $795 thousand and $722 thousand in 2018 and 2017 , respectively. At December 31, 2018 , the remaining minimum lease payments relating to these leases were as follows (in thousands): 2019 $ 644 2020 622 2021 462 2022 259 2023 121 Thereafter 864 Total $ 2,972 Depreciation expense was $2.6 million and $1.8 million for the years ended December 31, 2018 and 2017 , respectively.

Deposits

Deposits	12 Months Ended
	Dec. 31, 2018
Deposits [Abstract]
Deposits	Deposits The aggregate amount of time deposits in denominations of $250,000 or more was approximately $165.1 million and $171.3 million at December 31, 2018 and 2017 , respectively. At December 31, 2018 , the scheduled maturities of time deposits are as follows (in thousands): 2019 $ 449,948 2020 120,376 2021 28,094 2022 20,446 2023 29,053 Thereafter — Total $ 647,917 As of December 31, 2018 and 2017, there was a fair value adjustment of $759.1 thousand and $1.1 million , respectively, to time deposits as a result of business combinations. At December 31, 2018 and 2017 , the Company had $747 thousand and $155 thousand , respectively, of deposit accounts in overdraft status that have been reclassified to loans on the accompanying consolidated balance sheets. From time to time, the Company engages in deposit transactions with its directors, executive officers and their related interests (collectively referred to as "related parties"). Such deposits are made in the ordinary course of business and on substantially the same terms as those for comparable transactions prevailing at the time and do not present other unfavorable features. The total amount of related party deposits was $24.3 million and $16.7 million at December 31, 2018 and 2017 , respectively.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	Goodwill and Intangible Assets Goodwill and intangible assets: Past business combinations have created $66.1 million in goodwill for the Company. Finite lived intangible assets of the Company represent a core deposit premium recorded upon the purchase of certain assets and liabilities from other financial institutions. The following table presents information about our core deposit premium intangible asset at December 31 (in thousands): 2018 2017 Gross Accumulated Gross Accumulated Amortized intangible asset: Core deposit intangible $ 14,549 $ 1,602 $ 8,589 $ 626 The following table presents information about aggregate amortization expense for 2018 and 2017 and for the succeeding fiscal years as follows (in thousands): 2018 2017 Aggregate amortization expense of core deposit premium intangible $ 976 $ 346 Note 7. Goodwill and Intangible Assets, Continued Goodwill and intangible assets (continued): Estimated aggregate amortization expense of the core deposit premium intangible for the year ending December 31 (in thousands): 2019 $ 1,368 2020 1,351 2021 1,334 2022 1,317 2023 1,301 Thereafter 6,276 Total $ 12,947

Federal Home Loan Bank Advances

Federal Home Loan Bank Advances and Other Borrowings	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Federal Home Loan Bank Advances and Other Borrowings	Federal Home Loan Bank Advances and Other Borrowings Line of Credit: On October 31, 2017, the Company entered into a loan agreement (the “ Loan Agreement ”) with CapStar Bank (the “ Lender ”) providing for a revolving line of credit of up to $15 million . The Company may borrow and reborrow under the revolving line of credit until the line of credit termination date of January 15, 2019, after which no advances under the revolving line of credit may be reborrowed. The balance of the line on January 15, 2019 when it converted to a term loan was $0 and there may be no further borrrowings. The term loan commencement date would have begun on January 16, 2019. Line of Credit borrowings and the term loan will accrue interest at the Lender’s prime rate minus 0.25 percent, subject to a 3.50 percent floor. Beginning 90 days after the effective date of the revolving line of credit, the Company is required to pay quarterly payments of interest. In addition, commencing on January 15, 2019, the Company must pay quarterly principal amortization payments of $262.5 thousand for each fiscal quarter in 2019, $287.5 thousand for each fiscal quarter in 2020, $312.5 thousand for each fiscal quarter in 2021 and $337.5 thousand for each fiscal quarter in 2022 until and including the maturity date. The scheduled principal amortization payments are based upon the assumption that the revolving line of credit is fully drawn, and the required payments will be reduced on a pro-rata basis relative to the amount borrowed if the revolving line of credit is not fully drawn. The loan will mature on October 15, 2022, at which time all outstanding amounts under the loan agreement will become due and payable. In connection with entering into the Loan Agreement, the Company issued to the Lender a line of credit note dated as of October 31, 2017. Line of Credit (continued): The Loan Agreement contains typical representations, warranties and covenants for a revolving line of credit, and the loan agreement has certain financial covenants and capital ratio requirements. Pursuant to the Loan Agreement, the Bank may not permit non-performing assets to be greater than 3.25 percent of total assets. The Bank must not permit its Texas ratio (nonperforming assets divided by the sum of tangible equity plus the allowance for loan and lease losses) to be greater than 35.00 percent, and must not permit its liquidity ratio to be less than 9.00 percent (or less than 10.00 percent for two consecutive quarters). The Bank shall not permit, at the end of each quarter, its returns on average assets to be less than 0.45 percent from December 31, 2017 through and including September 30, 2018 and 0.50 percent at December 31, 2018 and thereafter. The Bank shall not permit the debt service coverage ratio, as of June 30 and December 31 of each fiscal year, commencing on December 31, 2017, to be less than 1.25:1.00 . The regulatory covenant states the Company will be "well capitalized," or such other successor term with a similar meaning, for all applicable state and federal regulatory purposes at all times, and will not be subject to any written agreement, order, capital directive or prompt corrective action directive by any Governmental Authority having regulatory authority over the Company, except where such order, capital directive or prompt corrective action directive does not result in, nor could reasonably be expected to result in, a Material Adverse Effect, or if required by any Governmental Authority having regulatory authority over the Borrower in order to remain "well capitalized" and in compliance with all applicable regulatory requirements, will have such higher amounts of Total Risk-based Capital and Tier 1 Risk-based Capital and/or such greater Tier 1 Leverage Ratio as specified by such Governmental Authority. Each Financial Institution Subsidiary of the Company will be "well capitalized , " or such other successor term with a similar meaning, for all applicable state and federal regulatory purposes at all times, and such Financial Institution Subsidiary (i) will have a Total Risk-based Capital Ratio of 10.50 percent or greater, a Tier 1 Risk based Capital Ratio of 9.50 percent or greater, and a Tier 1 Leverage Ratio of 8.00 percent or greater (each as defined by applicable federal and state regulations or orders) and not be subject to any written agreement, order, capital directive or prompt corrective action directive by any Governmental Authority having regulatory authority over such Financial Institution Subsidiary, except where such order, capital directive or prompt corrective action directive does not result in, nor could reasonably be expected to result in, a Material Adverse Effect, or (ii) if required by any Governmental Authority having regulatory authority over such Financial Institution Subsidiary in order to remain "well capitalized" and in compliance with all applicable regulatory requirements, will have such higher amounts of Total Risk-based Capital and Tier 1 Risk-based Capital and/or such greater Tier 1 Leverage Ratio as specified by such Governmental Authority. Notwithstanding the foregoing, if at any time any such Governmental Authority changes the definition of "well capitalized" either by amending such ratios or otherwise, such amended definition, and any such amended or new ratios, shall automatically, and in lieu of the existing definitions and ratios set forth in this Section, be incorporated by reference into this Agreement as the minimum standard for the Company or any Financial Institution Subsidiary, as the case may be, on and as of the date that any such amendment becomes effective by applicable statute, regulation, order or otherwise. The interest coverage ratio covenant states the Company shall not permit, as of June 30 and December 31 of each fiscal year, commencing December 31, 2017, its interest coverage ratio to be less than 2.50:1.00. As of December 31, 2018 , the Company and the Bank were in compliance with all of the loan covenants. As of December 31, 2017, the Company and the Bank were in compliance with all loan covenants except for the return on assets. The return on assets covenant was not met due to the tax law enacted in December 2017 which caused the Company to write down the deferred tax asset to the new tax rate. Capstar waived the covenant for December 2017 since the non-compliance was due to the tax law change and not caused by operations of the Company or Bank. Line of Credit (continued): The Loan Agreement has standard and commercially reasonable events of default, such as non-payment, failure to perform any covenant or agreement, breach of any representation or warranty, failure to pay other material indebtedness, bankruptcy, insolvency, any ERISA event, any material judgment, any material adverse effect, any change in control, any failure to be insured by the FDIC or any action by a governmental or regulatory authority, etc. The Lender has the right to accelerate the indebtedness upon an event of default. The obligations of the Company under the Loan Agreement are secured by a pledge of all of the capital stock of the Bank pursuant to stock pledge and security agreements. In the event of a default by the Company under the loan Agreement, the lender may terminate the commitments made under the loan agreement, declare all amounts outstanding to be payable immediately, and exercise or pursue any other remedy permitted under the loan agreement or the pledge agreements, or conferred to the lender by operation of law. As of December 31, 2017, the outstanding borrowings under the line of credit were $10 million and the rate was 4.25 percent . The Loan Agreement was paid in full on September 28, 2018 and no borrowings were outstanding as of December 31, 2018. The primary source of liquidity for the Company is the payment of dividends from the Bank. As of December 31, 2018 and 2017, the Bank was under no dividend restrictions that requires regulatory approval prior to the payment of a dividend from the Bank to the Company. FHLB borrowings: The Bank has agreements with the Federal Home Loan Bank of Cincinnati (FHLB) that can provide advances to the Bank in an amount up to $59.4 million. All of the loans are secured by first mortgages on 1-4 family residential, multi-family properties and commercial properties and are pledged as collateral for these advances. Additionally, the Bank pledged securities to FHLB with a carrying amount of $16.3 million at December 31, 2017. There were no securities pledged to FHLB at December 31, 2018. At December 31, 2018 and 2017, there were no advances from the FHLB. Borrowings: On May 1, 2018, the Company entered into a loan agreement with Waters & Waters, LLC in the amount of $500 thousand at a rate of 4.75 percent with semi-annual payments of principal plus accrued interest over an amortization period of ten years . The outstanding principal balance and accrued interest will be due and payable on April 30, 2028. Scheduled maturities : At December 31, 2018, scheduled maturities of the federal funds purchased of $10.8 million , and other borrowings of $480.3 thousand are as follows (amounts in thousands): 2019 $ 10,803 2020 43 2021 45 2022 47 2023 50 Thereafter 254 Total $ 11,242

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Income tax expense in the consolidated statements of income for the years ended December 31, 2018 and 2017 , includes the following (in thousands): 2018 2017 Current tax expense Federal $ 661 $ 1,962 State 141 428 Deferred tax expense (benefit) related to: Federal 1,992 1,441 State 439 158 Change in tax rate — 2,440 Total income tax expense $ 3,233 $ 6,429 The income tax expense is different from the expected tax expense computed by multiplying income before income tax expense by the statutory income tax rate of 21 percent in 2018 and 34 percent in 2017. The reasons for this difference are as follows (in thousands): 2018 2017 Federal income tax expense computed at the statutory rate $ 4,481 $ 3,891 State income taxes, net of federal tax benefit 551 491 Nondeductible acquisition expenses 138 364 Tax benefit from stock options (1,786 ) — Change in tax rate — 2,440 Other (151 ) (757 ) Total income tax expense $ 3,233 $ 6,429 During 2018, the Company identified an error in the computation and disclosure of deferred taxes for 2017. The error resulted from exclusion of a tax benefit from non-qualified options exercised in 2017. The Company has elected to correct the error in its current year financial statements which reduced tax provision by approximately $1.6 million for the year ended December 31, 2018. Note 8. Income Taxes, Continued The components of the net deferred tax asset as of December 31, 2018 and 2017 , were as follows (in thousands): 2018 2017 Deferred tax assets: Allowance for loan losses $ 2,172 $ 1,561 Fair value adjustments 6,086 4,829 Unrealized losses on investment securities 659 424 Unrealized losses on hedges 280 — Foreclosed real estate 271 301 Deferred compensation 833 849 Federal net operating loss carryforward 350 — Other 440 849 Total deferred tax assets 11,091 8,813 Deferred tax liabilities: Accumulated depreciation 1,875 1,194 Core deposit intangible 3,332 1,945 Other 286 223 Total deferred tax liabilities 5,493 3,362 Net deferred tax asset $ 5,598 $ 5,451 The Company has a Federal net operating loss carryforward of $1.7 million acquired with the acquisition of Foothills Bancorp. This federal net operating loss does not expire. The income tax returns of the Company for 2017 , 2016 , and 2015 are subject to examination by the federal and state taxing authorities, generally for three years after they were filed.

Subordinated debt

Subordinated debt	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Subordinated debt	On September 28, 2018, the Company completed an offering of $40 million in aggregate principal amount of fixed-to-floating rate subordinated notes due 2028 (the “Notes”) to certain institutional accredited investors. The Company used the net proceeds of the offering to repay the outstanding balance on the Company’s existing revolving line of credit to Capstar Bank in the amount of $15 million . The additional proceeds were used to pay the cash consideration to holders of Foothills Bancorp, Inc. common stock and holders of options to purchase Foothills Bancorp, Inc. common stock in connection with the Company’s acquisition of Foothills Bancorp, Inc., and for other general corporate purposes, including improving the Company’s and the Bank’s liquidity position. As a result $12 million was downstreamed to the Bank. The Notes initially bears interest at a rate of 5.625 percent per annum from and including September 28, 2018, to but excluding October 2, 2023, with interest during this period payable semi-annually in arrears. From and including October 2, 2023, to but excluding the maturity date or early redemption date, the interest rate will reset quarterly to an annual floating rate equal to three-month LIBOR, or an alternative rate determined in accordance with the terms of the Notes if three-month LIBOR cannot be determined, plus 255 basis points , with interest during this period payable quarterly in arrears. The Notes are redeemable by the Company, in whole or in part, on or after October 2, 2023, and at any time, in whole but not in part, upon the occurrence of certain events. The Notes have been structured to qualify initially as Tier 2 capital for the Company for regulatory capital purposes. The Notes debt issuance costs totaled $842 thousand and will be amortized through the Notes' maturity date. Amortization expense totaled $19 thousand during the twelve month period December 31, 2018. As of December 31, 2018, the principal balance was $40 million and debt issuance cost balance was $823 thousand .

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2018
Defined Benefit Plan [Abstract]
Employee Benefit Plans	Employee Benefit Plans 401(k) Plan: The Company provides a deferred salary reduction plan (“ Plan ”) under Section 401 (k) of the Internal Revenue Code covering substantially all employees. After one year of service the Company matches 100 percent of employee contributions up to 3 percent of compensation and 50 percent of employee contributions on the next 2 percent of compensation. The Company's contribution to the Plan was $715,698 in 2018 and $427,975 in 2017 . Stock Option Plans: The Company has one currently active equity incentive plan administered by the Board of Directors, the 2015 Stock Incentive plan, and four plans or programs, pursuant to which the Company has outstanding prior grants. These plans are described below: Legacy Cornerstone Bancshares, Inc. 2002 Long Term Incentive Plan – The plan provided Cornerstone Bancshares, Inc. officers and employees incentive stock options or non-qualified stock options to purchase shares of common stock. The exercise price for incentive stock options was not less than 100 percent of the fair market value of the common stock on the date of the grant. The exercise price of the non-qualified stock options was equal to or more or less than the fair market value of the common stock on the date of the grant. This plan expired in 2012. Legacy Cornerstone Non-Qualified Plan Options — During 2013 and 2014, Cornerstone issued non-qualified options to employees and directors. The options were originally documented in 2013 as being issued out of the Cornerstone Bancshares, Inc. 2002 Long Term Incentive Plan but that plan expired in 2012. The non-qualified options are governed by the grant document issued to the holders which incorporate the terms of the plan by reference. 2015 Stock Incentive Plan – This plan provides for incentive stock options, nonqualified stock options, and restricted stock. The maximum number of shares of common stock that can be sold or optioned under the plan is 2,000,000 shares. The term of each option shall be no more than ten years from the date of grant. In the case of an incentive stock option granted to a participant who, at the time the option is granted, owns stock representing more than ten percent of the voting power of all classes of stock of the Company or any parent or subsidiary thereof, the term of the option shall be five years from the date of grant or such shorter term as may be provided in the award agreement. Stock Option Plans (continued): The per share exercise price for the shares to be issued upon exercise of an option shall be such price as is determined by the plan administrator, subject to the following: In the case of an incentive stock option: (1) granted to an employee who, at the time of grant of such option, owns stock representing more than ten percent of the voting power of all classes of stock of the company or any parent or subsidiary thereof, the exercise price shall be no less than one hundred and ten percent of the fair market value per share on the date of grant; or (2) granted to any other employee, the per share exercise price shall be no less than one hundred percent of the fair market value per share on the date of grant. In the case of a nonstatutory stock option, the per share exercise price shall be no less than one hundred percent of the fair market value per share on the date of grant, unless otherwise determined by the Administrator. The incentive stock options vest 30 percent on the second anniversary of the grant date, 30 percent on the third anniversary of the grant date and 40 percent on the fourth anniversary of the grant date. Director non-qualified stock options vest 50 percent on the first anniversary of the grant date and 50 percent on the second anniversary of the grant date. Legacy Capstone Stock Option Plan - This plan was assumed by the Company on November 3, 2017 and subsequently closed. The plan provided for incentive stock options and nonqualified stock options. Under the plan, the exercise price of each option could not be less than 100 percent of the fair market value of the common stock on the date of grant. A summary of the status of these stock option plans is presented in the following table: Number Weighted Average Exercisable Price Outstanding at December 31, 2017 316,574 $ 11.82 Granted — — Exercised (132,783 ) 11.39 Forfeited (13,166 ) 31.96 Outstanding at December 31, 2018 170,625 $ 10.61 Number Weighted Average Exercisable Price Outstanding at December 31, 2016 717,524 $ 10.57 Granted — — Exercised (506,923 ) 9.64 Forfeited (24,496 ) 19.90 Capstone options assumed in business combination 130,469 11.76 Outstanding at December 31, 2017 316,574 $ 11.82 Stock Option Plans (continued): Information pertaining to options outstanding at December 31, 2018 , is as follows: Options Outstanding Options Exercisable Weighted- Average Remaining Weighted- Average Weighted- Average Exercise Number Contractual Exercise Number Exercise Prices Outstanding Life Price Exercisable Price 6.60 30,000 3.2 years 6.60 30,000 6.60 6.80 14,250 2.2 years 6.80 14,250 6.80 9.48 25,625 4.2 years 9.48 25,625 9.48 9.60 35,125 5.2 years 9.60 35,125 9.60 11.76 13,599 2.4 years 11.76 13,599 11.76 14.40 11,792 0.2 years 14.40 11,792 14.40 15.05 40,234 6.8 years 15.05 26,827 15.05 Outstanding, end of year 170,625 4.2 years 10.61 157,218 10.23 The Company recognized stock option compensation expense of $133,884 and $97,966 for the periods ended December 31, 2018 and 2017 , respectively. Stock appreciation rights compensation expense of $33,916 and $21,829 was recognized for the period ended December 31, 2018 and 2017, respectively. Direct stock grant expense issued to local advisory board members of $9,062 and $31,791 was included in salary and benefit expense for the period ended December 31, 2018 and 2017, respectively. The total fair value of shares underlying the options which vested during the periods ended December 31, 2018 and 2017 , was $243,831 and $313,977 , respectively. The income tax benefit recognized for the exercise of options for the periods ended December 31, 2018 and 2017 was $318,826 and $1,331,689 respectively. The intrinsic value of options exercised during the periods ended December 31, 2018 and 2017 was $1,523,014 and $5,468,780 , respectively. The aggregate intrinsic value of total options outstanding and exercisable options at December 31, 2018 was $1,307,043 and $ 1,263,872 , respectively. Cash received from options exercised under all share-based payment arrangements for the period ended December 31, 2018 was $1,519,244 . Information related to non-vested options for the period ended December 31, 2018 , is as follows: Number Weighted Average Grant-Date Fair Value Nonvested at December 31, 2017 23,455 $ 12.31 Granted — — Vested (13,346 ) 15.05 Forfeited/expired 3,298 15.05 Nonvested at December 31, 2018 13,407 $ 15.05 As of December 31, 2018 , there was approximately $124,450 of total unrecognized compensation cost related to nonvested stock-based compensation arrangements granted under the Plans. The cost is expected to be recognized over a weighted-average period of 1.0 year . There were no stock options granted during the twelve months period ended December 31, 2018 and December 31, 2017. Restricted Stock Awards: On August 4, 2017, the Board of Directors of the Company made grants of 27,500 shares of restricted stock under the Company’s 2015 Stock Incentive Plan to certain executives of the Company. The restricted shares of stock, which are subject to the terms of a Restricted Stock Grant Agreement between the Company and each recipient, will fully vest on the fifth anniversary of the grant date. Prior to vesting, the recipient will be entitled to vote the shares and receive dividends, if any, declared by the Company with respect to its common stock. Compensation expense for restricted stock is based on the fair value of the restricted stock awards at the time of the grant, which is equal to the market value of the Company’s common stock on the date of grant. The value of the restricted stock grants that are expected to vest is amortized monthly into compensation expense over the five year vesting period. The restricted shares had a fair value of $24.58 per share on the date of issuance. On January 25, 2018, the Board of Directors of the Company made grants of 7,553 shares of restricted stock under the Company’s 2015 Stock Incentive Plan to certain executives and directors of the Company. Restricted shares of stock are subject to the terms of a Restricted Stock Grant Agreement between the Company and each recipient. Two thousand ( 2000 ) shares will fully vest on the fifth anniversary of the grant date, 4627 shares vested within six months, and 926 shares vested upon two directors' retirement. Prior to vesting, the recipient will be entitled to vote the shares and receive dividends, if any, declared by the Company with respect to its common stock. Compensation expense for restricted stock is based on the fair value of the restricted stock awards at the time of the grant, which is equal to the market value of the Company’s common stock on the date of grant. The value of the restricted stock grants that are expected to vest is amortized monthly into compensation expense over the five year and six month vesting periods. The restricted shares had a fair value of $21.61 per share on the date of issuance. For the period ended December 31, 2018 and 2017, compensation expense of $263,013 and $56,330 , respectively, was recognized related to restricted stock awards. As of December 31, 2018 , there was $519,727 of unrecognized compensation cost related to non-vested restricted stock awards granted under the plan. The following table summarizes activity relating to non-vested restricted stock awards: Number Nonvested at December 31, 2017 27,500 Granted 7,553 Vested (5,553 ) Forfeited/expired — Nonvested at December 31, 2018 29,500

Securities Sold Under Agreement

Securities Sold Under Agreements to Repurchase	12 Months Ended
	Dec. 31, 2018
Securities Sold Under Agreement to Repurchase [Abstract]
Securities Sold Under Agreements to Repurchase	Securities Sold Under Agreements to Repurchase Securities sold under repurchase agreements, which are secured borrowings, generally mature within one to four days from the transaction date. Securities sold under repurchase agreements are reflected at the amount of cash received in connection with the transaction. The Company may be required to provide additional collateral based on the fair value of the underlying securities. The Company monitors the fair value of the underlying securities on a daily basis. At December 31, 2018 and 2017 , the Company had securities sold under agreements to repurchase of $11.8 million and $24.1 million , respectively, with commercial checking customers which were secured by $11.8 million and $24.1 million of agency and of mortgage-backed securities, respectively.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Loan Commitments: The Company is a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing and depository needs of its customers. These financial instruments include commitments to extend credit and standby letters of credit. Such commitments involve, to varying degrees, elements of credit risk and interest rate risk in excess of the amount recognized in the balance sheets. The majority of all commitments to extend credit are variable rate instruments while the standby letters of credit are primarily fixed rate instruments. The Company's exposure to credit loss is represented by the contractual amount of those instruments. The Company uses the same credit policies in making commitments as it does for on-balance sheet instruments. A summary of the Company's total contractual amount for all off-balance sheet commitments at December 31, 2018 is as follows: Commitments to extend credit $ 333.9 million Standby letters of credit 12.2 million 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 many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The amount of collateral obtained, if deemed necessary by the Company upon extension of credit, is based on management's credit evaluation of the customer. Collateral held varies, but may include accounts receivable, inventory, property and equipment, residential real estate, and income-producing commercial properties. Standby letters of credit issued by the Company are conditional commitments to guarantee the performance of a customer to a third party. Those letters of credit are primarily issued to support public and private borrowing arrangements. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loans to customers. Collateral held varies and is required in instances which the Company deems necessary. At December 31, 2018 and 2017 , the carrying amount of liabilities related to the Company's obligation to perform under standby letters of credit was insignificant. The Company has not been required to perform on any standby letters of credit, and the Company has not incurred any losses on standby letters of credit for the years ended December 31, 2018 and 2017 . Contingencies: In the normal course of business, the Company may become involved in various legal proceedings. In the opinion of management, any liability resulting from such proceedings would not have a material effect on the Company's consolidated financial statements.

Regulatory Matters

Regulatory Matters	12 Months Ended
	Dec. 31, 2018
Banking and Thrift [Abstract]
Regulatory Matters	Regulatory Matters Regulatory Capital Requirements: The Company and the Bank are subject to regulatory capital requirements administered by federal banking agencies. Capital adequacy guidelines and, additionally for banks, prompt corrective action regulations, involve quantitative measures of assets, liabilities, and certain off-balance-sheet items calculated under regulatory accounting practices. Capital amounts and classifications are also subject to qualitative judgements by regulators. Failure to meet capital requirements can initiate regulatory action. The final rules implementing Basel Committee on Banking Supervision’s capital guidelines for U.S. banks (Basel III rules) became effective for the Company on January 1, 2015, with full compliance with all of the requirements being phased in over a multi-year schedule, and fully phased in by January 1, 2019. Under Basel III rules, the Company must hold a capital conservation buffer above the adequately capitalized risk‑based capital ratios. The capital conservation buffer is being phased in at the rate of 0.625 percent per year from 0.0 percent in 2015 to 2.50 percent on January 1, 2019. The capital conservation buffer for 2017 is 1.25 percent and for 2018 is 1.875 percent. The net unrealized gain or loss on available for sale securities is not included in computing regulatory capital. Management believes as of December 31, 2018 , the Company and Bank meet all capital adequacy requirements to which they are subject. Regulatory Capital Requirements (continued): Prompt corrective action regulations provide five classifications: well capitalized, adequately capitalized, undercapitalized, significantly undercapitalized, and critically undercapitalized, although these terms are not used to represent overall financial condition. If adequately capitalized, regulatory approval is required to accept brokered deposits. If undercapitalized, capital distributions are limited, as is asset growth and expansion, and capital restoration plans are required. At year end 2018 and 2017, the most recent regulatory notifications categorized the Bank as well capitalized under the regulatory framework for prompt corrective action. There are no conditions or events since that notification that management believes have changed the Bank's category. Management currently believes, based on internal capital analysis and earnings projections, the Bank's capital position is adequate to meet current and future regulatory minimum capital requirements. Regulatory Restrictions on Dividends: Pursuant to Tennessee banking law, the Bank may not, without the prior consent of the Commissioner of the Tennessee Department of Financial Institutions (TDFI), pay any dividends to the Company in a calendar year in excess of the total of the Bank's retained net income for that year plus the retained net income for the preceding two years. During the year ended December 31, 2018 , SmartBank paid no dividends to the Company. As of December 31, 2018 , the Bank could pay approximately $33.4 million of additional dividends to the Company without prior approval of the Commissioner of the TDFI. Regulatory Capital Levels: Actual and required capital levels at December 31, 2018 and 2017 are presented below (dollars in thousands): are Actual Minimum for capital adequacy purposes Minimum to be well capitalized under prompt corrective action provisions (1) Amount Ratio Amount Ratio Amount Ratio December 31, 2018 SmartFinancial, Inc. (2) SmartBank Total Capital (to Risk-Weighted Assets) $ 243,774 12.74 % $ 153,017 8.00 % $ 191,271 10.00 % Tier 1 Capital (to Risk-Weighted Assets) 235,499 12.31 % 114,763 6.00 % 153,017 8.00 % Common Equity Tier 1 Capital (to Risk-Weighted Assets) 235,499 12.31 % 86,072 4.50 % 124,326 6.50 % Tier 1 Capital (to Average Assets) 235,499 11.17 % 84,300 4.00 % 105,375 5.00 % (1) The prompt corrective action provisions are applicable at the Bank level only. (2) Reporting regulations were revised during 2018 the capital ratios reported for SmartFinancial Inc. at December 31, 2017 were not required to be reported at December 31, 2018. Regulatory Capital Levels (continued): Actual Minimum for capital Minimum to be well Amount Ratio Amount Ratio Amount Ratio December 31, 2017 SmartFinancial, Inc. Total Capital (to Risk-Weighted Assets) $ 163,683 10.98 % $ 119,257 8.00 % Tier 1 Capital (to Risk-Weighted Assets) 157,823 10.59 % 89,442 6.00 % Common Equity Tier 1 Capital (to Risk-Weighted Assets) 157,823 10.59 % 67,082 4.50 % Tier 1 Capital (to Average Assets) 157,823 10.78 % 58,562 4.00 % SmartBank Total Capital (to Risk-Weighted Assets) $ 168,148 11.29 % $ 119,111 8.00 % $ 148,889 10.00 % Tier 1 Capital (to Risk-Weighted Assets) 162,288 10.90 % 89,333 6.00 % 119,111 8.00 % Common Equity Tier 1 Capital (to Risk-Weighted Assets) 162,288 10.90 % 67,000 4.50 % 96,778 6.50 % Tier 1 Capital (to Average Assets) 162,288 11.26 % 57,656 4.00 % 72,070 5.00 % (1) The prompt corrective action provisions are applicable at the Bank level only.

Concentrations of Credit Risk

Concentrations of Credit Risk	12 Months Ended
	Dec. 31, 2018
Risks and Uncertainties [Abstract]
Concentration of Credit Risk	Concentrations of Credit Risk The Company originates primarily commercial, residential, and consumer loans to customers in Tennessee, Florida, Georgia and Alabama. The ability of the majority of the Company's customers to honor their contractual loan obligations is dependent on the economy in these areas. Eighty-two percent of the Company's loan portfolio is concentrated in loans secured by real estate, of which a substantial portion is secured by real estate in the Company's primary market areas. Commercial real estate, including commercial construction loans, represented 55 percent of the loan portfolio at December 31, 2018 , and 56 percent of the loan portfolio at December 31, 2017 . Accordingly, the ultimate collectability of the loan portfolio and recovery of the carrying amount of foreclosed assets is susceptible to changes in real estate conditions in the Company's primary market areas. The other concentrations of credit by type of loan are set forth in Note 4. The Bank, as a matter of policy, does not generally extend credit to any single borrower or group of related borrowers in excess of 25 percent of statutory capital, or approximately $77.8 million .

Fair Value of Assets and Liabil

Fair Value of Assets and Liabilities	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value of Assets and Liabilities	Determination of Fair Value: The Company uses fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures. In accordance with the “Fair Value Measurements and Disclosures” ASC Topic 820, the fair value of a financial instrument is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value is best determined based upon quoted market prices. In cases where quoted market prices are not available, fair values are based on estimates using present value or other valuation techniques. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows. Accordingly, the fair value estimates may not be realized in an immediate settlement of the instrument. ASC Topic 820 provides a consistent definition of fair value, which focuses on exit price in an orderly transaction between market participants at the measurement date under current market conditions. If there has been a significant decrease in the volume and level of activity for the asset or liability, a change in valuation technique or the use of multiple valuation techniques may be appropriate. In such instances, determining the price at which willing market participants would transact at the measurement date under current market conditions depends on the facts and circumstances and requires the use of significant judgment. The fair value is a reasonable point within the range that is most representative of fair value under current market conditions. Fair Value Hierarchy: In accordance with this guidance, the Company groups its financial assets and financial liabilities generally measured at fair value in three levels, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. Level 1 - Valuation is based on quoted prices in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date. Level 1 assets and liabilities generally include debt and equity securities that are traded in an active exchange market. Valuations are obtained from readily available pricing sources for market transactions involving identical assets or liabilities. Level 2 - Valuation is based on inputs other than quoted prices included within Level I that are observable for the asset or liability, either directly or indirectly. The valuation may be based on quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the asset or liability. Level 3 - Valuation is based on unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Level 3 assets and liabilities include financial instruments whose value is determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which determination of fair value requires significant management judgment or estimation. A financial instrument's categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The following methods and assumptions were used by the Company in estimating fair value disclosures for financial instruments: Cash and Cash Equivalents: For cash and due from banks, interest-bearing deposits, and federal funds sold, the carrying amount is a reasonable estimate of fair value based on the short-term nature of the assets and are considered Level 1 inputs. Securities Available-for-Sale: Where quoted prices are available in an active market, management classifies the securities within Level 1 of the valuation hierarchy. If quoted market prices are not available, management estimates fair values using pricing models that use observable inputs or quoted prices at securities with similar characteristics. Examples of such instruments, which would generally be classified within Level 2 of the valuation hierarchy, including GSE obligations, corporate bonds, and other securities. Mortgage-backed securities are included in Level 2 if observable inputs are available. In certain cases where there is limited activity or less transparency around inputs to the valuation, management classifies those securities in Level 3. Fair Value Hierarchy (continued): Restricted Investments: It is not practicable to determine the fair value of restricted investments due the restrictions placed on its transferability. Loans: With the adoption of ASU 2016-01 on January 1, 2018, we refined our methodology to estimate the fair value of our loan portfolio to use the exit price notion as required by the ASU. The guidance was applied on a prospective approach resulting in prior-periods no longer being comparable. See “Note 1 – Presentation of Financial Information” for further information. For variable-rate loans that reprice frequently and with no significant change in credit risk, fair values are based on carrying values. Fair value for fixed rate loans are estimated using discounted cash flow analyses, using market interest rates for comparable loans. Fair values for nonperforming loans are estimated using discounted cash flow analyses or underlying collateral values, where applicable. These methods are considered Level 3 inputs. Deposits: The fair values disclosed for demand deposits (for example, interest and noninterest checking, savings, and certain types of money market accounts) are, by definition, equal to the amount payable on demand at the reporting date (that is, their carrying amounts) and are considered Level 2 inputs. Fair values for fixed-rate time deposits are estimated using a discounted cash flow calculation that applies market interest rates on comparable instruments to a schedule of aggregated expected monthly maturities on time deposits, and are considered Level 2 inputs. Securities Sold Under Agreement to Repurchase: The carrying value of these liabilities approximates their fair value, and are considered Level 1 inputs. Federal Home Loan Bank ("FHLB") Advances, Subordinated Debt and Other Borrowings: The fair value of the FHLB fixed rate borrowings are estimated using discounted cash flows, based on the current incremental borrowing rates for similar types of borrowing arrangements, and are considered Level 2 inputs. The carrying value of FHLB floating rate borrowings and floating rate other borrowings and subordinated debt approximates their fair value and are considered Level 1 inputs. The fair value of the subordinated debt borrowings are estimated using discounted cash flows and are considered Level 3 inputs Derivative Financial Instruments - Fair value is estimated using pricing models of derivatives with similar characteristics or discounted cash flow models where future floating cash flows are projected and discounted back; and accordingly, these derivatives are classified within Level 2 of the fair value hierarchy. See Note 21—Derivative Financial Instruments for additional information. Commitments to Extend Credit and Standby Letters of Credit: Because commitments to extend credit and standby letters of credit are made using variable rates and have short maturities, the carrying value and the fair value are immaterial for disclosure. Measurements of Fair Value: Assets recorded at fair value on a recurring basis are as follows, in thousands Balance as of Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Other Unobservable Inputs (Level 3) Securities available-for-sale: U.S. Government-sponsored enterprises (GSEs) $ 43,503 $ — $ 43,503 $ — Municipal securities 55,161 — 55,161 — Other debt securities 910 — 910 — Mortgage-backed securities 102,114 — 102,114 — Total securities available-for-sale $ 201,688 $ — $ 201,688 $ — Derivative financial instruments $ 1,174 $ — $ 1,174 Balance as of Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Other Unobservable Inputs (Level 3) Securities available-for-sale: U.S. Government-sponsored enterprises (GSEs) $ 25,776 $ — $ 25,776 $ — Municipal securities 9,003 — 9,003 — Other debt securities 950 — 950 — Mortgage-backed securities 116,215 — 116,215 — Total securities available-for-sale $ 151,944 $ — $ 151,944 $ — The Company has no assets or liabilities whose fair values are measured on a recurring basis using Level 3 inputs. Additionally, there were no transfers between Level 1 and Level 2 in the fair value hierarchy. Assets Measured at Fair Value on a Nonrecurring Basis: Under certain circumstances management makes adjustments to fair value for assets and liabilities although they are not measured at fair value on an ongoing basis. The following tables present the financial instruments carried on the consolidated balance sheets by caption and by level in the fair value hierarchy, for which a nonrecurring change in fair value has been recorded (in thousands): Balance as of Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Other Unobservable Inputs (Level 3) Impaired loans $ 671 $ — $ — $ 671 Foreclosed assets 2,495 — — 2,495 Balance as of Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Other Unobservable Inputs (Level 3) Impaired loans $ 769 $ — $ — $ 769 Foreclosed assets 3,254 — — 3,254 For Level 3 assets measured at fair value on a non-recurring basis as of December 31, 2018 and 2017 , the significant unobservable inputs used in the fair value measurements are presented below. Balance as of Valuation Technique Significant Other Unobservable Input Weighted Average of Input Impaired loans $ 671 Third Party Appraisal Appraisal Discounts 44.3 % Foreclosed assets 2,495 Third Party Appraisal Appraisal Discounts 23.3 % Balance as of Valuation Technique Significant Other Unobservable Input Weighted Average of Input Impaired loans $ 769 Cash Flow Discounted Cash Flow / Appraisal Discounts 35.5 % Foreclosed assets 3,254 Appraisal Appraisal Discounts 17.8 % Impaired Loans: Loans considered impaired under ASC 310-10-35, Receivables , are loans for which, based on current information and events, it is probable that the Company will be unable to collect all principal and interest payments due in accordance with the contractual terms of the loan agreement. Impaired loans can be measured based on the present value of expected payments using the loan’s original effective rate as the discount rate, the loan’s observable market price, or the fair value of the collateral less selling costs if the loan is collateral dependent. The fair value of impaired loans were measured based on the value of the collateral securing these loans or the discounted cash flows of the loans, as applicable. Impaired loans are classified within Level 3 of the fair value hierarchy. Collateral may be real estate and/or business assets including equipment, inventory, and/or accounts receivable. The Company determines the value of the collateral based on independent appraisals performed by qualified licensed appraisers. These appraisals may utilize a single valuation approach or a combination of approaches including comparable sales and the income approach. Appraised values are discounted for costs to sell and may be discounted further based on management’s historical knowledge, changes in market conditions from the date of the most recent appraisal, and/or management’s expertise and knowledge of the customer and the customer’s business. Such discounts by management are subjective and are typically significant unobservable inputs for determining fair value. Impaired loans are reviewed and evaluated on at least a quarterly basis for additional impairment and adjusted accordingly, based on the same factors discussed above. Foreclosed assets: Foreclosed assets, consisting of properties obtained through foreclosure or in satisfaction of loans, are initially recorded at fair value less estimated costs to sell upon transfer of the loans to other real estate. Subsequently, other real estate is carried at the lower of carrying value or fair value less costs to sell. Fair values are generally based on third party appraisals of the property and are classified within Level 3 of the fair value hierarchy. The appraisals are sometimes further discounted based on management’s historical knowledge, and/or changes in market conditions from the date of the most recent appraisal, and/or management’s expertise and knowledge of the customer and the customer’s business. Such discounts are typically significant unobservable inputs for determining fair value. In cases where the carrying amount exceeds the fair value, less estimated costs to sell, a loss is recognized in noninterest expense. Carrying value and estimated fair value: The carrying amount and estimated fair value of the Company’s financial instruments at December 31, 2018 and December 31, 2017 are as follows (in thousands): December 31, 2018 Fair Value Measurements Using Carrying Amount Level 1 Level 2 Level 3 Estimated Fair Value Assets: Cash and cash equivalents $ 115,822 115,822 — — $ 115,822 Securities available-for-sale 201,688 — 201,688 — 201,688 Restricted investments 11,499 N/A N/A N/A N/A Loans, net 1,768,964 — — 1,766,838 1,766,838 Liabilities: Noninterest-bearing demand deposits 319,861 — 319,861 — 319,861 Interest-bearing demand deposits 311,482 — 311,482 — 311,482 Money Market and Savings deposits 641,945 — 641,945 — 641,945 Time deposits 648,675 — 649,169 — 649,169 Securities sold under agreements to repurchase 11,756 — 11,756 — 11,756 Federal Home Loan Bank advances and other borrowings 11,243 — 11,243 — 11,243 Subordinated debt 39,177 — — 39,190 39,158 39,190 Derivative financial instruments 1,174 — 1,174 — 1,174 December 31, 2017 Fair Value Measurements Using Carrying Amount Level 1 Level 2 Level 3 Estimated Fair Value Assets: Cash and cash equivalents $ 113,027 113,027 — — $ 113,027 Securities available-for-sale 151,944 — 151,944 — 151,944 Restricted investments 6,431 N/A N/A N/A N/A Loans, net 1,317,398 — — 1,292,303 1,292,303 Liabilities: Noninterest-bearing demand deposits 220,520 — 220,520 — 220,520 Interest-bearing demand deposits 231,644 — 231,644 — 231,644 Money Market and Savings deposits 543,645 — 543,645 — 543,645 Time deposits 442,774 — 443,547 — 443,547 Securities sold under agreements to repurchase 24,055 — 24,055 — 24,055 Federal Home Loan Bank advances and other borrowings 43,600 — 43,600 — 43,600 Limitations Fair value estimates are made at a specific point in time, based on relevant market information and information about the financial instrument. These estimates do not reflect any premium or discount that could result from offering for sale at one time the Company’s entire holdings of a particular financial instrument. Because no market exists for a significant portion of the Company’s financial instruments, fair value estimates are based on many judgments. These estimates are subjective in nature and involve uncertainties and matters of significant judgment and therefore cannot be determined with precision. Changes in assumptions could significantly affect the estimates. Fair value estimates are based on 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. Significant assets and liabilities that are not considered financial instruments include deferred income taxes and premises and equipment. In addition, the tax ramifications related to the realization of the unrealized gains and losses can have a significant effect on fair value estimates and have not been considered in the estimates.

Small Business Lending Fund

Small Business Lending Fund	12 Months Ended
	Dec. 31, 2018
Small Business Lending Fund [Abstract]
Small Business Lending Fund	Small Business Lending Fund In connection with the Company's merger with Legacy SmartFinancial, Inc. in 2015, the Company assumed Legacy SmartFinancial's obligations under a stock purchase agreement with the U.S. Department of the Treasury and issued 12,000 shares of preferred stock at $1,000 per share under the Small Business Lending Fund Program (the "SBLF Program"). The Company paid cash dividends at a one percent rate or $120 thousand for the year ended December 31, 2015 on the preferred shares. On February 4, 2016 the dividend rate for the preferred shares increased to nine percent and as a result the Company incurred preferred stock dividends of $1.0 million for the year ended December 31, 2016 . On January 30, 2017, the Company completed a public offering of 2,010,084 shares of its common stock, par value $1.00 per share, with the gross proceeds to the Company of approximately $33.2 million . On March 6, 2017, the Company used proceeds from the offering to redeem the $12 million of preferred stock and pay the $195 thousand accrued dividend.

Concentration in Deposits

Concentration in Deposits	12 Months Ended
	Dec. 31, 2018
Risks and Uncertainties [Abstract]
Concentration In Deposits	Concentration in Deposits The Company had a concentration in its deposits of three customers totaling approximately $116.1 million at December 31, 2017 and three customers totaling approximately $160.6 million concentration of deposits at December 31, 2018 .

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share Basic earnings per share is computed by dividing net income available to common stockholders by the weighted average number of common shares outstanding. Diluted earnings per share is computed by dividing net income available to common shareholders by the weighted average number of common shares outstanding and dilutive common share equivalents using the treasury stock method. Dilutive common share equivalents include common shares issuable upon exercise of outstanding stock options and restricted stock. The effect from the stock options and restricted stock on incremental shares from the assumed conversions for net income per share-basic and net income per share-diluted are presented below. There were antidilutive shares of 13,166 for the year ended December 31, 2017. There were no antidulutive shares at December 31, 2018. (Dollars in thousands, except share amounts) 2018 2017 Basic earnings per share computation: Net income available to common stockholders $ 18,102 $ 4,820 Average common shares outstanding – basic 12,423,618 8,639,212 Basic earnings per share $ 1.46 $ 0.56 Diluted earnings per share computation: Net income available to common stockholders $ 18,102 $ 4,820 Average common shares outstanding – basic 12,423,618 8,639,212 Incremental shares from assumed conversions: Stock options and restricted stock 94,022 154,315 Average common shares outstanding - diluted 12,517,640 8,793,527 Diluted earnings per share $ 1.45 $ 0.55

Condensed Parent Information

Condensed Parent Information	12 Months Ended
	Dec. 31, 2018
Condensed Financial Information Disclosure [Abstract]
Condensed Parent Information	(Dollars in thousands) CONDENSED BALANCE SHEETS December 31, December 31, 2018 2017 ASSETS Cash $ 13,684 $ 3,936 Investment in subsidiaries 308,422 168,104 Other assets 99 42,766 Total assets $ 322,205 $ 214,806 LIABILITIES AND STOCKHOLDERS’ EQUITY Other liabilities $ 17 $ (1,046 ) Other borrowings 39,177 10,000 Total liabilities 39,194 8,954 Stockholders’ equity 283,011 205,852 Total liabilities and stockholders’ equity $ 322,205 $ 214,806 CONDENSED STATEMENTS OF INCOME Years Ended December 31, 2018 2017 INCOME Interest income $ 21 $ — EXPENSES Interest expense 1,005 69 Other operating expenses 2,822 2,657 (Loss) before equity in undistributed earnings of subsidiaries and income tax benefit (3,806 ) (2,726 ) Equity in undistributed earnings of subsidiaries 22,741 7,134 Income tax (benefit) expense (833 ) 607 Net income 18,102 5,015 Preferred stock dividend requirements — 195 Net income available to common stockholders $ 18,102 $ 4,820 STATEMENTS OF CASH FLOWS Years Ended December 31, 2018 2017 CASH FLOWS FROM OPERATING ACTIVITIES Net income $ 18,102 $ 5,015 Adjustments to reconcile net income to net cash (used in) provided by operating activities: Equity in undistributed income of subsidiary (22,741 ) (7,134 ) Other 1,631 (2,449 ) Net cash used in operating activities (3,008 ) (4,568 ) CASH FLOWS FROM FINANCING ACTIVITIES Proceeds from issuance of note payable — 10,000 Repayment of note payable (10,000 ) — Redemption of preferred stock — (12,000 ) Issuance of subordination debt 39,158 — Proceeds from issuance of common stock 1,528 37,853 Payment of dividends on preferred stock — (195 ) Net cash provided by financing activities 30,686 35,658 CASH FLOWS FROM INVESTING ACTIVITIES Net cash paid for business combinations (5,930 ) (14,222 ) Equity contribution to subsidiary (12,000 ) (15,000 ) Net cash used in investing activities (17,930 ) (29,222 ) NET INCREASE IN CASH AND CASH EQUIVALENTS 9,748 1,868 CASH AND CASH EQUIVALENTS, beginning of year 3,936 2,068 CASH AND CASH EQUIVALENTS, end of year $ 13,684 $ 3,936

Derivatives

Derivatives	12 Months Ended
	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives	Derivatives Financial derivatives are reported at fair value in other assets or other liabilities. The accounting for changes in the fair value of a derivative depends on whether it has been designated and qualifies as part of a hedging relationship. For derivatives not designated as hedges, the gain or loss is recognized in current period earnings. Derivatives designated as fair value hedges: For derivative instruments that are designated and qualify as a fair value hedge, the gain or loss on the derivative instrument as well as the offsetting loss or gain on the hedged asset or liability attributable to the hedged risk are recognized in current earnings. The gain or loss on the derivative instrument is presented on the same income statement line item as the earnings effect of the hedged item. The Company utilizes interest rate swaps designated as fair value hedges to mitigate the effect of changing interest rates on the fair values of fixed rate callable securities available-for-sale. The hedging strategy on securities converts the fixed interest rates to LIBOR-based variable interest rates. These derivatives are designated as partial term hedges of selected cash flows covering specified periods of time prior to the call dates of the hedged securities. The Company has elected early adoption of FASB ASU 2017-12, which allows such partial term hedge designations. On September 14, 2018 and December 4, 2018, the Company entered into fifteen swap transactions with a notional amount of $35 million designated as fair value hedges. These derivatives are intended to protect against the effects of changing interest rates on the fair values of fixed rate securities. A summary of the Company's fair value hedge relationships as of December 31, 2018 are as follows (in thousands): December 31, 2018 Balance Sheet Location Weighted Average Remaining Maturity (In Years) Weighted Average Pay Rate Receive Rate Notional Amount Estimated Fair Value Liability derivatives Interest rate swap agreements - securities Other liabilities 9.23 3.10% 3 month LIBOR $35,000 -$1,174 There were no fair value hedge relationships as of December 31, 2017. Derivatives designated as fair value hedges (continued): The effects of the Company's fair value hedge relationships on the income statement during the twelve months ended December 31, 2018 were as follows (in thousands): Twelve Months Ended December 31, 2018 Interest Income Total amount of income and expense line items presented in the consolidated statements of income $92,210 Gain (loss) on fair value hedging relationship Interest rate swap agreements - securities: Hedged items (1,174) Derivative designated as hedging instruments 1,174 The following amounts were recorded on the balance sheet related to cumulative basis adjustments for fair value hedges at December 31, 2018 : Carrying Amount of the Hedged Assets (in thousands) Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets Line item on the balance sheet December 31, 2018 December 31, 2018 Securities available-for-sale $39,730 $1,174

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Nature of Business	Nature of Business: SmartFinancial, Inc. (the "Company") is a bank holding company whose principal activity is the ownership and management of its wholly-owned subsidiary, SmartBank (the "Bank"). The Company provides a variety of financial services to individuals and corporate customers through its offices in Tennessee, Alabama, Florida, and Georgia. The Company's primary deposit products are interest-bearing demand deposits, savings and money market deposits, and time deposits. Its primary lending products are commercial, residential, and consumer loans.
Basis of Presentation and Accounting Estimates	Basis of Presentation and Accounting Estimates: The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiary. All significant intercompany balances and transactions have been eliminated in consolidation. In preparing the consolidated financial statements in conformity with accounting principles generally accepted in the United States of America, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the balance sheet, and reported amounts of revenues and expenses during the reporting period. 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 foreclosed assets and deferred taxes, other than temporary impairments of securities, the fair value of financial instruments, goodwill, and business combination elements (Day 1 and Day 2 Valuation). The Company has evaluated subsequent events for potential recognition and/or disclosure in the consolidated financial statements and accompanying notes included in this Annual Report through the date of the issued consolidated financial statements.
Cash and Cash Equivalents	Cash and Cash Equivalents: For purposes of reporting consolidated cash flows, cash and due from banks includes cash on hand, cash items in process of collection and amounts due from banks. Cash and cash equivalents also includes interest-bearing deposits in banks and federal funds sold. Cash flows from loans, federal funds sold, securities sold under agreements to repurchase and deposits are reported net. The Bank is required to maintain average balances in cash or on deposit with the Federal Reserve Bank. The reserve requirement was $36.7 million and $16.5 million at December 31, 2018 and 2017 , respectively. The Company places its cash and cash equivalents with other financial institutions and limits the amount of credit exposure to any one financial institution. From time to time, the balances at these financial institutions exceed the amount insured by the Federal Deposit Insurance Corporation. The Company has not experienced any losses on these accounts and management considers this to be a normal business risk.
Securities	Securities: Management has classified all securities as available-for-sale. Securities available-for-sale are recorded at fair value, with unrealized gains and losses excluded from earnings and reported in other comprehensive loss. Purchase premiums and discounts are recognized in interest income using the interest method over the terms of the securities. Gains and losses on the sale of securities are recorded on the trade date and are determined using the specific identification method. The Company evaluates securities quarterly for other than temporary impairment using relevant accounting guidance specifying that (a) if the Company does not have the intent to sell a debt security prior to recovery and (b) it is more likely than not that it will not have to sell the debt security prior to recovery, the security would not be considered other than temporarily impaired unless a credit loss has occurred in the security. If management does not intend to sell the security and it is more likely than not that they will not have to sell the security before recovery of the cost basis, management will recognize the credit component of an other-than- temporary impairment of a debt security in earnings and the remaining portion in other comprehensive loss. Securities (continued): Securities borrowed or purchased under agreements to resell and securities loaned or sold under agreements to repurchase are treated as collateralized financial transactions. These agreements are recorded at the amount at which the securities were acquired or sold plus accrued interest. It is the Company's policy to take possession of securities purchased under resale agreements. The market value of these securities is monitored, and additional securities are obtained when deemed appropriate to ensure such transactions are adequately collateralized. The Company also monitors its exposure with respect to securities sold under repurchase agreements, and a request for the return of excess securities held by the counterparty is made when deemed appropriate.
Restricted-Investments	Restricted Investments: The Company is required to maintain an investment in capital stock of various entities. Based on redemption provisions of these entities, the stock has no quoted market value and is carried at cost. At their discretion, these entities may declare dividends on the stock. Management reviews restricted investments for impairment based on the ultimate recoverability of the cost basis in these stocks.
Loans	Loans: Loans that management has the intent and ability to hold for the foreseeable future or until maturity or pay-off are reported at their outstanding principal balances less deferred fees and costs on originated loans and the allowance for loan losses. Interest income is accrued on the outstanding principal balance. Loan origination fees, net of certain direct origination costs of consumer and installment loans are recognized at the time the loan is placed on the books. Loan origination fees for all other loans are deferred and recognized as an adjustment of the yield over the life of the loan using the straight-line method without anticipating prepayments. The accrual of interest on loans is discontinued when, in management's opinion, the borrower may be unable to meet payments as they become due, or at the time the loan is 90 days past due, unless the loan is well-secured and in the process of collection. Unsecured loans are typically charged off no later than 120 days past due. Past due status is based on contractual terms of the loan. In all cases, loans are placed on nonaccrual or charged-off at an earlier date if collection of principal and interest is considered doubtful. All interest accrued but not collected for loans that are placed on nonaccrual or charged off is reversed against interest income or charged to the allowance, unless management believes that the accrual of interest is recoverable through the liquidation of collateral. Interest income on nonaccrual loans is recognized on the cash basis, until the loans are returned to accrual status. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and the loan has been performing according to the contractual terms for a period of not less than six months.
Finance, Loan and Lease Receivables, Held-for-sale, Policy [Policy Text Block]	Loans Held for Sale: Loans originated and intended for sale in the secondary market are carried at the lower of aggregate cost or fair value. When a loan is placed in the held-for-sale category, we stop amortizing the related deferred fees and costs. The remaining unamortized fees and costs are recognized as part of the cost basis of the loan at the time it is sold. Loans held for sale primarily represent mortgage loans on one-to-four family dwellings ("Mortgage") and to a lesser extent the portion of Small Business Administration (“SBA”) loans intended to be sold. Realized gains and losses for Mortgage loans are recognized when legal title to the loans has been transferred to the purchaser and sales proceeds have been received and are reflected in the accompanying consolidated statement of income in gains on sale of loans and other assets. We generally sell the guaranteed portion of SBA loans in the secondary market and retain the unguaranteed portion in our portfolio. Upon sale of the guaranteed portion of an SBA loan, we recognize a portion of the gain on sale into income and defer a portion of the gain related to the relative fair value of the unguaranteed loan balance we retain. The deferred gain is amortized into income over the remaining life of the loan. Gains and losses on sales of loans held for sale are included in the Consolidated Statements of Operations in gains on sale of loans and other assets.
Acquired Loans	Acquired Loans: Acquired loans are those acquired in business combinations by the Company or Bank. The fair values of acquired loans with evidence of credit deterioration, Purchased Credit Impaired loans (“ PCI loans ”), are recorded net of a nonaccretable discount and accretable discount. Any excess of cash flows expected at acquisition over the estimated fair value is referred to as the accretable discount and is recognized in interest income over the remaining life of the loan when there is reasonable expectation about the amount and timing of such cash flows. The difference between contractually required payments at acquisition and the cash flows expected to be collected at acquisition is the nonaccretable discount, which is included in the carrying amount of acquired loans. Subsequent decreases to the expected cash flows will generally result in a provision for loan losses. Subsequent significant increases in cash flows result in a reversal of the provision for loan losses to the extent of prior charges or a reclassification of the difference from nonaccretable to accretable with a positive impact on the accretable discount. Acquired loans are initially recorded at fair value at acquisition date. Accretable discounts related to certain fair value adjustments are accreted into income over the estimated lives of the loans. The Company accounts for PCI loans acquired in the acquisition using the expected cash flows method of recognizing discount accretion based on the acquired loans' expected cash flows. Management recasts the estimate of cash flows expected to be collected on each acquired impaired loan pool periodically. If the present value of expected cash flows for a pool is less than its carrying value, an impairment is recognized by an increase in the allowance for loan losses and a charge to the provision for loan losses. If the present value of expected cash flows for a pool is greater than its carrying value, any previously established allowance for loan losses is reversed and any remaining difference increases the accretable yield which will be taken into interest income over the remaining life of the loan pool. Acquired impaired loans are generally not subject to individual evaluation for impairment and are not reported with impaired loans, even if they would otherwise qualify for such treatment. Purchased performing loans are recorded at fair value, including a credit discount. Credit losses on acquired performing loans are estimated based on analysis of the performing portfolio. Such estimated credit losses are recorded as nonaccretable discounts in a manner similar to purchased impaired loans. The fair value discount other than for credit loss is accreted as an adjustment to yield over the estimated lives of the loans. A provision for loan losses is recorded for any deterioration in these loans subsequent to the acquisition.
Allowance for Loan Losses	Allowance for Loan Losses: The allowance for loan losses is established as losses are estimated to have occurred through a provision for loan losses charged to expense. Loan losses are charged against the allowance when management believes the uncollectibility of a loan balance is confirmed. Confirmed losses are charged off immediately. Subsequent recoveries, if any, are credited to the allowance. The allowance is an amount that management believes will be adequate to absorb estimated losses relating to specifically identified loans, as well as probable credit losses inherent in the balance of the loan portfolio. The allowance for loan losses is evaluated on a regular basis by management and is based upon management's periodic review of the uncollectibility of loans in light of historical experience, the nature and volume of the loan portfolio, overall portfolio quality, review of specific problem loans, current economic conditions that may affect the borrower's ability to pay, estimated value of any underlying collateral and prevailing economic conditions. This evaluation is inherently subjective as it requires estimates that are susceptible to significant revision as more information becomes available. This evaluation does not include the effects of expected losses on specific loans or groups of loans that are related to future events or expected changes in economic conditions. While management uses the best information available to make its evaluation, future adjustments to the allowance may be necessary if there are significant changes in economic conditions. In addition, regulatory agencies, as an integral part of their examination process, periodically review the Company's allowance for loan losses, and may require the Company to make additions to the allowance based on their judgment about information available to them at the time of their examinations. The allowance consists of specific and general components. The specific component relates to loans that are classified as impaired. For impaired loans, an allowance is established when the discounted cash flows, collateral value, or observable market price of the impaired loan is lower than the carrying value of that loan. The general component covers non-impaired loans and is based on the Company's historical loss experience adjusted for other qualitative factors. Other adjustments may be made to the allowance for pools of loans after an assessment of internal or external influences on credit quality that are not fully reflected in the historical loss or risk rating data. Allowance for Loan Losses (continued): An unallocated component may be maintained to cover uncertainties that could affect management's estimate of probable losses. The unallocated component of the allowance reflects the margin of imprecision inherent in the underlying assumptions used in the methodologies for estimating specific and general losses in the portfolio. As part of the risk management program, an independent review is performed on the loan portfolio, which supplements management’s assessment of the loan portfolio and the allowance for loan losses. The result of the independent review is reported directly to the Audit Committee of the Board of Directors. Loans, for which the terms have been modified at the borrower's request, and for which the borrower is experiencing financial difficulties, are considered troubled debt restructurings and classified as impaired. A loan is considered impaired when it is probable, based on current information and events, the Company will be unable to collect all principal and interest payments due in accordance with 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 when due. Loans that experience insignificant payment delays and payment shortfalls are not classified as impaired. Impaired loans are measured 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. Interest on accruing impaired loans is recognized as long as such loans do not meet the criteria for nonaccrual status. Large groups of smaller balance homogeneous loans are collectively evaluated for impairment. The Company's homogeneous loan pools include consumer real estate loans, commercial real estate loans, construction and land development loans, commercial and industrial loans, and consumer and other loans. The general allocations to these loan pools are based on the historical loss rates for specific loan types and the internal risk grade, if applicable, adjusted for both internal and external qualitative risk factors. The qualitative factors considered by management include, among other factors, (1) changes in local and national economic conditions; (2) changes in asset quality; (3) changes in loan portfolio volume; (4) the composition and concentrations of credit; (5) the impact of competition on loan structuring and pricing; (6) the impact of interest rate changes on portfolio risk and (7) effectiveness of the Company's loan policies, procedures and internal controls. The total allowance established for each homogeneous loan pool represents the product of the historical loss ratio adjusted for qualitative factors and the total dollar amount of the loans in the pool.
Troubled Debt Restructurings	Troubled Debt Restructurings: The Company designates loan modifications as Troubled Debt Restructurings ("TDRs") when for economic and legal reasons related to the borrower's financial difficulties, it grants a concession to the borrower that it would not otherwise consider. TDRs can involve loans remaining on nonaccrual, moving to nonaccrual, or continuing on accrual status, depending on the individual facts and circumstances of the borrower. In circumstances where the TDR involves charging off a portion of the loan balance, the Company typically classifies these restructurings as nonaccrual. In connection with restructurings, the decision to maintain a loan that has been restructured on accrual status is based on a current, well documented credit evaluation of the borrower's financial condition and prospects for repayment under the modified terms. This evaluation includes consideration of the borrower's current capacity to pay, which among other things may include a review of the borrower's current financial statements, an analysis of global cash flow sufficient to pay all debt obligations, a debt to income analysis, and an evaluation of secondary sources of payment from the borrower and any guarantors. This evaluation also includes an evaluation of the borrower's current willingness to pay, which may include a review of past payment history, an evaluation of the borrower's willingness to provide information on a timely basis, and consideration of offers from the borrower to provide additional collateral or guarantor support. The credit evaluation also reflects consideration of the borrower's future capacity and willingness to pay, which may include evaluation of cash flow projections, consideration of the adequacy of collateral to cover all principal and interest, and trends indicating improving profitability and collectability of receivables. Restructured nonaccrual loans may be returned to accrual status based on a current, well-documented credit evaluation of the borrower's financial condition and prospects for repayment under the modified terms. This evaluation must include consideration of the borrower's sustained historical repayment for a reasonable period, generally a minimum of six months, prior to the date on which the loan is returned to accrual status.
Foreclosed Assets	Foreclosed Assets: Foreclosed assets acquired through, or in lieu of, loan foreclosure are held for sale and are initially recorded at fair value less selling costs. Any write-down to fair value at the time of transfer to foreclosed assets is charged to the allowance for loan losses. Subsequent to foreclosure, valuations are periodically performed by management and the assets are carried at the lower of carrying amount or fair value less costs to sell. Costs of improvements are capitalized, whereas costs relating to holding foreclosed assets and subsequent write-downs to the value are expensed. The amount of residential real estate where physical possession had been obtained included within foreclosed assets at December 31, 2018 and 2017 was $400 thousand and $546 thousand , respectively. There was no residential real estate in process of foreclosure at December 31, 2018 and December 31, 2017 .
Premises and Equipment	Premises and Equipment: Land is carried at cost. Premises and equipment are carried at cost less accumulated depreciation computed on the straight-line method over the estimated useful lives of the assets or the expected terms of the leases, if shorter. Expected terms include lease option periods to the extent that the exercise of such options is reasonably assured. Maintenance and repairs are expensed as incurred while major additions and improvements are capitalized. Gains and losses on dispositions are included in current operations. Buildings and leasehold improvements 15 - 40 years Furniture and equipment 3-7 years
Goodwill and Intangible Assets	Goodwill and Intangible Assets: Goodwill represents the cost in excess of the fair value of net assets acquired (including identifiable intangibles) in transactions accounted for as business combinations. Goodwill has an indefinite useful life and is evaluated for impairment annually, or more frequently if events and circumstances indicate that the asset might be impaired. FASB ASC 350, Goodwill and Other , regarding testing goodwill for impairment provides an entity the option to first perform a qualitative assessment to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If an entity does a qualitative assessment and determines that this is the case, or if a qualitative assessment is not performed, it is required to perform additional goodwill impairment testing to identify potential goodwill impairment and measure the amount of goodwill impairment loss to be recognized for that reporting unit (if any). Based on a qualitative assessment, if an entity determines that the fair value of a reporting unit is more than its carrying amount, the two-step goodwill impairment test is not required. The Company performs its annual goodwill impairment test as of December 31 of each year. For 2018 , the results of the qualitative assessment provided no indication of potential impairment. Goodwill will continue to be monitored for triggering events that may indicate impairment prior to the next scheduled annual impairment test. Intangible assets consist of core deposit premiums created as a result of Business Combinations by the Company or Bank where deposits are assumed. The core deposit premium is initially recognized based on a valuation performed as of the consummation date. The core deposit premium is amortized over the average remaining life of the acquired customer deposits. Amortization expense relating to these intangible assets was $976 thousand and $346 thousand for the years ended December 31, 2018 and 2017 , respectively. The intangible assets were evaluated for impairment as of December 31, 2018 , and based on that evaluation it was determined that there was no impairment.
Transfer of Financial Assets	Transfer 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 (1) the assets have been isolated from the Company - put presumptively beyond the reach of the transferor and its creditors, even in bankruptcy or other receivership, (2) 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 (3) the Company does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity or the ability to unilaterally cause the holder to return specific assets.
Derivatives	Derivative Instruments: In accordance with ASC Topic 815, Derivatives and Hedging, all derivative instruments are recorded on the accompanying consolidated balance sheet at their respective fair values. The accounting for changes in fair value (i.e., gains or losses) of a derivative instrument depends on whether it has been designated and qualifies as part of a hedging relationship. If the derivative instrument is not designated as a hedge, changes in the fair value of the derivative instrument are recognized in earnings in the period of change. For derivative instruments that are designated and qualify as a fair value hedge, the gain or loss on the derivative instrument as well as the offsetting loss or gain on the hedged asset or liability attributable to the hedged risk are recognized in current earnings. The gain or loss on the derivative instrument is presented on the same income statement line item as the earnings effect of the hedged item.
Advertising Costs	Advertising Costs: The Company expenses all advertising costs as incurred.
Income Taxes	Income Taxes: The income tax accounting guidance results in two components of income tax expense: current and deferred. Current income tax expense reflects taxes to be paid or refunded for the current period by applying the provisions of the enacted tax law to the taxable income or excess of deductions over revenues. The Company determines deferred income taxes using the liability (or balance sheet) method. Under this method, the net deferred tax asset or liability is based on the tax effects of the differences between the book and tax bases of assets and liabilities, and enacted changes in tax rates and laws are recognized in the period in which they occur. Deferred income tax expense results from changes in deferred tax assets and liabilities between periods. Deferred tax assets are recognized if it is more likely than not, based on the technical merits, that the tax position will be realized or sustained upon examination. The term more likely than not means a likelihood of more than 50 percent; the terms examined and upon examination also include resolution of the related appeals or litigation processes, if any. A tax position that meets the more-likely-than-not recognition threshold is initially and subsequently measured as the largest amount of tax benefit that has a greater than 50 percent likelihood of being realized upon settlement with a taxing authority that has full knowledge of all relevant information. The determination of whether or not a tax position has met the more-likely-than-not recognition threshold considers the facts, circumstances, and information available at the reporting date and is subject to management's judgment. Deferred tax assets may be reduced by deferred tax liabilities and a valuation allowance if, based on the weight of evidence available, it is more likely than not that some portion or all of a deferred tax asset will not be realized.
Stock Compensation Plans	Stock Compensation Plans: At December 31, 2018 , the Company had options outstanding under stock-based compensation plans, which are described in more detail in Note 11. The plans have been accounted for under the accounting guidance (FASB ASC 718, Compensation - Stock Compensation) which requires that the compensation cost relating to share-based payment transactions be recognized in financial statements. That cost will be measured based on the grant date fair value of the equity or liability instruments issued. The stock compensation accounting guidance covers a wide range of share-based compensation arrangements including stock options, restricted share plans, performance-based awards, share appreciation rights, and stock or other stock based awards. Stock Compensation Plans(continued): The stock compensation accounting guidance requires that compensation cost for all stock awards be calculated and recognized over the employees' service period, generally defined as the vesting period. For awards with graded-vesting, compensation cost is recognized on a straight-line basis over the requisite service period for the entire award. A Black-Scholes model is used to estimate the fair value of stock options, while the market value of the Company's common stock at the date of grant is used for restrictive stock awards and stock grants.
Employee Benefit Plan	Employee Benefit Plan: Employee benefit plan costs are based on the percentage of individual employee's salary, not to exceed the amount that can be deducted for federal income tax purposes.
Variable Interest Entities	Variable Interest Entities: An entity is referred to as a variable interest entity (VIE) if it meets the criteria outlined in ASC Topic 810, which are: (1) the entity has equity that is insufficient to permit the entity to finance its activities without additional subordinated financial support from other parties or (2) the entity has equity investors that cannot make significant decisions about the entity's operations or that do not absorb the expected losses or receive the expected returns of the entity. A VIE must be consolidated by the Company if it is deemed to be the primary beneficiary of the VIE, which is the party involved with the VIE that has a majority of the expected losses, expected residual returns, or both. At December 31, 2017, the Company had an investment in Community Advantage Fund, LLC that qualified as an unconsolidated VIE. The Company’s investment in a partnership consists of an equity interest in a lending partnership for the purposes of loaning funds to an unrelated entity. This entity will use the funds to make loans through the SBA Community Advantage Loan Initiative. The Company uses the equity method when it owns an interest in a partnership and can exert significant influence over the partnership’s operations. Under the equity method, the Company’s ownership interest in the partnership’s capital is reported as an investment on its consolidated balance sheets in other assets and the Company’s allocable share of the income or loss from the partnership is reported in noninterest income or expense in the consolidated statements of income. The Company ceases recording losses on an investment in partnership when the cumulative losses and distributions from the partnership exceed the carrying amount of the investment and any advances made by the Company. After the Company’s investment in such partnership reaches zero, cash distributions received from these investments are recorded as income.
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. Unrealized gains and losses on available for sale securities are the only component of accumulated other comprehensive loss.
Fair Value of Financial Instruments	Fair Value of Financial Instruments: Fair values of financial instruments are estimates using relevant market information and other assumptions, as more fully disclosed in Note 16. Fair value estimates involve uncertainties and matters of significant judgment. Changes in assumptions or in market conditions could significantly affect the estimates.
Business Combinations	Business Combinations: Business combinations are accounted for using the acquisition method of accounting. Under the acquisition method of accounting, acquired assets and assumed liabilities are included with the acquirer's accounts as of the date of acquisition at estimated fair value, with any excess of purchase price over the fair value of the net assets acquired (including identifiable intangible assets) capitalized as goodwill. In the event that the fair value of the net assets acquired exceeds the purchase price, an acquisition gain is recorded for the difference in consolidated statements of income for the period in which the acquisition occurred. An intangible asset is recognized as an asset apart from goodwill when it arises from contractual or other legal rights or if it is capable of being separated or divided from the acquired entity and sold, transferred, licensed, rented or exchanged. In addition, acquisition-related costs and restructuring costs are recognized as period expenses as incurred. Estimates of fair value are subject to refinement for a period not to exceed one year from acquisition date as information relative to acquisition date fair values becomes available.
Earnings Per Common Share	Earnings Per Common Share: Basic earnings per common share represents income available to common stockholders divided by the weighted-average number of common shares outstanding during the period. Diluted earnings per common share reflects additional common shares that would have been outstanding if dilutive potential common shares had been issued, as well as any adjustment to income that would result from the assumed issuance. Potential common shares that may be issued by the Company relate to restricted stock and outstanding stock options and are determined using the treasury stock method.
Segment Reporting	Segment Reporting: ASC Topic 280, Segment Reporting, provides for the identification of reportable segments on the basis of distinct business units and their financial information to the extent such units are reviewed by an entity’s chief decision maker (which can be an individual or group of management persons). ASC Topic 280 permits aggregation or combination of segments that have similar characteristics. In the Company’s operations, each bank branch is viewed by management as being a separately identifiable business or segment from the perspective of monitoring performance and allocation of financial resources. Although the branches operate independently and are managed and monitored separately, each is substantially similar in terms of business focus, type of customers, products, and services. Accordingly, the Company’s consolidated financial statements reflect the presentation of segment information on an aggregated basis in one reportable segment.
Recently Issued Not Yet Effective Accounting Pronouncements	Recently Issued Not Yet Effective Accounting Pronouncements: The following is a summary of recent authoritative pronouncements not yet in effect that could impact the accounting, reporting, and/or disclosure of financial information by the Company. In February 2016, the FASB issued guidance that requires lessees to recognize almost all leases on their balance sheet as a right of-use asset and a lease liability in ASU 2016-2: Leases (Topic 842 ). For income statement purposes, the FASB retained a dual model, requiring leases to be classified as either operating or finance. Classification will be based on criteria that are largely similar to those applied in current lease accounting, but without explicit bright lines. Lessor accounting is similar to the current model, but updated to align with certain changes to the lessee model and the new revenue recognition standard. Existing sale-leaseback guidance, including guidance for real estate, is replaced with a new model applicable to both lessees and lessors. The new guidance will be effective for public business entities for annual periods beginning after December 15, 2018 including interim periods within those fiscal years. The Company has several lease agreements, such as branch locations, which are currently considered operating leases, and therefore, not recognized on the Company’s consolidated statements of condition. The Company expects the new guidance will require these lease agreements to be recognized on the consolidated statements of condition as a right-of-use asset and a corresponding lease liability. Therefore, the Company’s preliminary evaluation indicates the provisions of ASU No. 2016-02 are expected to impact the Company’s consolidated balance sheets, along with our regulatory capital ratios. Recently Issued Not Yet Effective Accounting Pronouncements (continued): In January 2018, the FASB issued ASU 2018-01, Leases (Topic 842 ) Land Easement Practical Expedient Transition to Topic 84 2 , an amendment to ASU 2016-2: Leases. The amendments in this Update permit an entity to elect an optional transition practical expedient to not evaluate under Topic 842 land easements that exist or expired before the entity’s adoption of Topic 842 and that were not previously accounted for as leases under Topic 840. An entity that elects this practical expedient should apply the practical expedient consistently to all of its existing or expired land easements that were not previously accounted for as leases under Topic 840. Once an entity adopts Topic 842, it should apply that Topic prospectively to all new (or modified) land easements to determine whether the arrangement should be accounted for as a lease. An entity that does not elect this practical expedient should evaluate all existing or expired land easements in connection with the adoption of the new lease requirements in Topic 842 to assess whether they meet the definition of a lease. An entity should continue to apply its current accounting policy for accounting for land easements that existed before the entity’s adoption of Topic 842. For example, if an entity currently accounts for certain land easements as leases under Topic 840, it should continue to account for those land easements as leases before its adoption of Topic 842. The effective date and transition requirements for the amendments are the same as the effective date and transition requirements in Update 2016-02. In July 2018, the FASB issued ASU No. 2018-11, Leases - Targeted Improvements to provide entities with relief from the costs of implementing certain aspects of the new leasing standard, ASU No. 2016-02. Specifically, under the amendments in ASU 2018-11: (1) entities may elect not to recast the comparative periods presented when transitioning to the new leasing standard, and (2) lessors may elect not to separate lease and non-lease components when certain conditions are met. The amendments have the same effective date as ASU 2016-02 (January 1, 2019 for the Company). The Company expects to elect both transition options. In December 2018, the FASB also issued ASU 2018-20, Leases (Topic 842) - Narrow-Scope Improvements for Lessors, which provides for certain policy elections and changes lessor accounting for sales and similar taxes and certain lessor costs. Upon adoption of ASU 2016-2, ASU 2018-11 and ASU 2018-20 on January 1, 2019, the Company expects to recognize right-of-use assets and related lease liabilities totaling $2.6 million and $2.7 million , respectively. The Company expects to elect to apply certain practical expedients provided under ASU 2016-02 whereby the Company will not reassess (i) whether any expired or existing contracts are or contain leases, (ii) the lease classification for any expired or existing leases and (iii) initial direct costs for any existing leases. The Company also do not expect to apply the recognition requirements of ASU 2016-02 to any short-term leases (as defined by related accounting guidance). The Company expect to account for lease and non-lease components separately because such amounts are readily determinable under our lease contracts and because we expect this election will result in a lower impact on our balance sheet. The Company expect to utilize the modified-retrospective transition approach prescribed by ASU 2018-11. In June 2016, FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments . The ASU changed the credit loss model on financial instruments measured at amortized cost, available for sale securities and certain purchased financial instruments. Credit losses on financial instruments measured at amortized cost will be determined using a current expected credit loss model which requires the Company to measure all expected credit losses for financial instruments held at the reporting date based on historical experience, current conditions, and reasonable supportable forecasts. This replaces the existing incurred loss model and is applicable to the measurement of credit losses on financial assets measured at amortized cost and applies to some off-balance sheet credit exposures. Purchased financial assets with more-than insignificant credit deterioration since origination ("PCD assets" which are currently named "PCI Loans") measured at amortized cost will have an allowance for credit losses established at acquisition as part of the purchase price. Subsequent increases or decreases to the allowance for credit losses on PCD assets will be recognized in the income statement. Interest income should be recognized on PCD assets based on the effective interest rate, determined excluding the discount attributed to credit losses at acquisition. Credit losses relating to available-for-sale debt securities will be recognized through an allowance for credit losses. The amount of the credit loss is limited to the amount by which fair value is below amortized cost of the available-for-sale debt security. The amendments in this update are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years for the Company and other SEC filers. Early adoption is permitted and if early adopted, all provisions must be adopted in the same period. The amendments should be applied through a cumulative-effect adjustment to retained earnings as of the beginning of the period adopted. A prospective approach is required for securities with other than temporary impairment recognized prior to adoption. Recently Issued Not Yet Effective Accounting Pronouncements (continued): The Company is continuing its implementation efforts through its company-wide implementation team. The implementation team meets periodically to discuss the latest developments and ensure progress is being made. The team also keeps current on evolving interpretations and industry practices related to ASU 2016-13 via webcasts, publications, conferences, and peer bank meetings. The team continues to evaluate and validate data resources and different loss methodologies. The Company’s preliminary evaluation indicates the provisions of ASU No. 2016-13 are expected to impact the Company’s consolidated financial statements, in particular an increase to the level of the reserve for credit losses. However, the Company continues to evaluate the extent of the potential impact. The guidance of ASU 2016-13 was recently amended by ASU 2018-19, Codification Improvements to Topic 326, Financial Instruments - Credit Losses, which changed the effective date for non-public companies and clarified that operating lease receivables are not within the scope of the standard. In January 2017, FASB issued ASU No. 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment . The ASU simplifies the subsequent measurement of goodwill and eliminates Step 2 from the goodwill impairment test. The Company should perform its goodwill impairment test 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. The impairment charge is limited to the amount of goodwill allocated to that reporting unit. The amendments in this update are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted for goodwill impairment tests performed on testing dates after January 1, 2017. The Company does not expect these amendments to have a material effect on its financial statements. In March 2017, FASB issued ASU No. 2017-08, Receivables - Nonrefundable Fees and Other Costs (Topic 310-20): Premium Amortization on Purchased Callable Debt Securities. The ASU shortens the amortization period for certain callable debt securities held at a premium. The premium on individual callable debt securities shall be amortized to the earliest call date. This guidance does not apply to securities for which prepayments are estimated on a large number of similar loans where prepayments are probable and reasonably estimable. The amendments in this update are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early adoption is permitted. This update should be adopted on a modified retrospective basis with a cumulative-effect adjustment to retained earnings on the date of adoption. The Company does not expect these amendments to have a material effect on its financial statements. As part of its Simplification Initiative, the FASB has issued ASU 2018-07, Compensation-Stock Compensation (Topic 718): Improvements to Nonemployee Share-Based Payment Accounting . ASU No. 2018-07 expands the scope of Topic 718, Compensation-Stock Compensation (which previously only included payments to employees), to include share-based payment transactions for acquiring goods and services from non-employees. This required entities to apply the requirements of Topic 718 to non-employee awards, except for specific guidance on inputs to an option pricing model and the attribution of cost (i.e., the period of time over which share-based payment awards vest and the pattern of cost recognition over that period). Additionally, the amendments specify that Topic 718 applies to all share-based payment transactions in which a grantor acquires goods or services to be used or consumed in the grantor’s own operations by issuing share-based payment awards, and clarify that Topic 718 does not apply to share-based payments used to effectively provide (1) financing to the issuer, or (2) awards granted in conjunction with selling goods or services to customers as part of a contract accounted for under Topic 606, Revenue from Contracts with Customers . The amendments are effective for fiscal years beginning after December 15, 2018, and for the interim periods within those years. The Company does not expect these amendments to have a material effect on its consolidated financial statements. Recently Issued Not Yet Effective Accounting Pronouncements (continued): In August 2018, the FASB issued ASU No. 2018-13, Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement. This ASU eliminates, adds and modifies certain disclosure requirements for fair value measurements. Among the changes, entities will no longer be required to disclose the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy, but will be required to disclose the range and weighted average used to develop significant unobservable inputs for Level 3 fair value measurements. ASU No. 2018-13 is effective for interim and annual reporting periods beginning after December 15, 2019; early adoption is permitted. Entities are also allowed to elect early adoption of the eliminated or modified disclosure requirements and delay adoption of the new disclosure requirements until their effective date. As ASU No. 2018-13 only revises disclosure requirements, it will not have a material impact on the Company’s consolidated financial statements. ASU 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40) - Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract. ASU 2018-15 clarifies certain aspects of ASU 2015-05, “Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement,” which was issued in April 2015. Specifically, ASU 2018-15 aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). ASU 2018-15 does not affect the accounting for the service element of a hosting arrangement that is a service contract. ASU 2018-15 will be effective for us on January 1, 2020, with early adoption permitted, and is not expected to have a significant impact on our financial statements. ASU 2018-16, “Derivatives and Hedging (Topic 815) - Inclusion of the Secured Overnight Financing Rate (SOFR) Overnight Index Swap (OIS) Rate as a Benchmark Interest Rate for Hedge Accounting Purposes.” The amendments in this update permit use of the OIS rate based on SOFR as a U.S. benchmark interest rate for hedge accounting purposes under Topic 815 in addition to the interest rates on direct U.S. Treasury obligations, the LIBOR swap rate, the OIS rate based on the Fed Funds Effective Rate and the Securities Industry and Financial Markets Association (SIFMA) Municipal Swap Rate. ASU 2018-16 will be effective for the Company on January 1, 2019 and is not expected to have a significant impact on our financial statements. Recently Issued and Adopted Accounting Pronouncements: We adopted ASU 2014-09, Revenue from Contracts with Customers (Topic 606) and its related amendments as of January 1, 2018 utilizing the modified retrospective approach. The implementation of the new standard did not have a material impact on the measurement or recognition of revenue; as such, a cumulative effect adjustment to opening retained earnings was not deemed necessary. Since the guidance does not apply to revenue associated with financial instruments, including loans and securities that are accounted for under other GAAP, the new guidance did not have a material impact on revenue most closely associated with financial instruments, including interest income and expense. The Company completed its overall assessment of revenue streams and review of related contracts potentially affected by the ASU, including, deposit related fees, interchange fees, merchant income, and insurance and brokerage commissions. Based on this assessment, the Company concluded that ASU 2014-09 did not materially change the method in which the Company currently recognizes revenue for these revenue streams. Under ASU 2014-09, we adopted new policies related to revenue recognition. In general, for revenue not associated with financial instruments, guarantees and lease contracts, we apply the following steps when recognizing revenue from contracts with customers: (i) identify the contract, (ii) identify the performance obligations, (iii) determine the transaction price, (iv) allocate the transaction price to the performance obligations and (v) recognize revenue when performance obligation is satisfied. Our contracts with customers are generally short term in nature, typically due within one year or less or cancellable by us or our customer upon a short notice period. Performance obligations for our customer contracts are generally satisfied at a single point in time, typically when the transaction is complete, or over time. For performance obligations satisfied over time, we primarily use the output method, directly measuring the value of the products/services transferred to the customer, to determine when performance obligations have been satisfied. We typically receive payment from customers and recognize revenue concurrent with the satisfaction of our performance obligations. In most cases, this occurs within a single financial reporting period. For payments received in advance of the satisfaction of performance obligations, revenue recognition is deferred until such time the performance obligations have been satisfied. In cases where we have not received payment despite satisfaction of our performance obligations, we accrue an estimate of the amount due in the period our performance obligations have been satisfied. For contracts with variable components, only amounts for which collection is probable are accrued. We generally act in a principal capacity, on our own behalf, in most of Recently Issued and Adopted Accounting Pronouncements (continued): our contracts with customers. In such transactions, we recognize revenue and the related costs to provide our services on a gross basis in our financial statements. In some cases, we act in an agent capacity, deriving revenue through assisting other entities in transactions with our customers. In such transactions, we recognized revenue and the related costs to provide our services on a net basis in our financial statements. These transactions relate to our customers' use of various interchange and ATM/debit card networks. Based on our underlying contracts, ASU 2014-09 requires us to report network costs associated with debit card and ATM transactions netted against the related fees from such transactions. Previously, such network costs were reported as a component of other noninterest expense. For the twelve months period ended December 31, 2018 , gross interchange and debit card transaction fees totaled $ 1.6 million while related network costs totaled $ 1.0 million . On a net basis, we reported $ 573 thousand as interchange and debit card transaction fees in the accompanying Consolidated Statement of Income for the twelve months period ended December 31, 2018 . For the twelve months period ended December 31, 2017 we reported interchange and debit card transaction fees totaling $ 952 thousand on a gross basis in the accompanying Consolidated Statement of Income while related network costs totaling $ 595 thousand were reported in other operating expenses included as a component of other noninterest expense. ASU 2016-01 Financial Instruments - Overall (Subtopic 825-10): Recognition of Financial Assets and Financial Liabilities, makes targeted amendments to the guidance for recognition, measurement, presentation and disclosure of financial instruments. ASU 2016-01 requires equity investments, other than equity method investments, to be measured at fair value with changes in fair value recognized in net income. The ASU requires a cumulative-effect adjustment to retained earnings as of the beginning of the reporting period of adoption to reclassify the cumulative change in fair value of equity securities previously recognized in Accumulated Other Comprehensive Income. ASU 2016-01 became effective for the Company on January 1, 2018 and there was no adjustment to retained earnings. ASU 2016-01 also emphasizes the e xisting requirement to use exit prices to measure fair value for disclosure purposes and clarifies that entities should not make use of a practicability exception in determining the fair value of loans. Accordingly, we refined the calculation used to determine the disclosed fair value of our loans held for investment portfolio as part of adopting this standard. The refined calculation is disclosed Note 16 - Fair Value Disclosures. ASU 2017-09, Compensation - Stock Compensation (Topic 718) - Scope of Modification Accounting. ASU 2017-09 clarifies when changes to the terms or conditions of a share-based payment award must be accounted for as modifications. Under ASU 2017-09, an entity will not apply modification accounting to a share-based payment award if all of the following are the same immediately before and after the change: (i) the award's fair value, (ii) the award's vesting conditions and (iii) the award's classification as an equity or liability instrument. ASU 2017-09 became effective for us on January 1, 2018 and did not have a significant impact on our financial statements. ASU 2017-12, Derivatives and Hedging (Topic 815) - Targeted Improvements to Accounting for Hedging Activities. ASU 2017-12 amends the hedge accounting recognition and presentation requirements in ASC 815 to improve the transparency and understandability of information conveyed to financial statement users about an entity’s risk management activities to better align the entity’s financial reporting for hedging relationships with those risk management activities and to reduce the complexity of and simplify the application of hedge accounting. The Company early adopted the standard and it does not have a significant impact on our financial statements.
Reclassifications	Reclassifications : Certain captions and amounts in the 2017 consolidated financial statements were reclassified to conform to the 2018 presentation. Such reclassifications had no effect on net income and shareholders’ equity

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Schedule of Useful Lives	Buildings and leasehold improvements 15 - 40 years Furniture and equipment 3-7 years A summary of premises and equipment at December 31, 2018 and 2017 , is as follows (in thousands): 2018 2017 Land and land improvements $ 14,712 $ 10,854 Building and leasehold improvements 36,640 28,576 Furniture, fixtures and equipment 12,318 10,073 Construction in progress 2,875 1,495 Total, gross 66,545 50,998 Accumulated depreciation (10,533 ) (7,998 ) Total, net $ 56,012 $ 43,000

Business Combinations (Tables)

Business Combinations (Tables)	12 Months Ended
	Dec. 31, 2018
Foothills Bancorp [Member]
Business Acquisition [Line Items]
Schedule of Business Acquisitions	The following table details the financial impact of the merger, including the calculation of the purchase price, the allocation of the purchase price to the fair values of net assets assumed, and goodwill recognized: Calculation of Purchase Price Shares of SMBK common stock issued to Foothills Bancorp shareholders as of November 1, 2018 1,183,232 Market price of SMBK common stock on November 1, 2018 $ 20.34 Estimated fair value of SMBK common stock issued (in thousands) 24,067 Cash consideration paid (in thousands) 6,069 Total consideration (in thousands) $ 30,136 Allocation of Purchase Price (in thousands) Total consideration above $ 30,136 Fair value of assets acquired and liabilities assumed: Cash and cash equivalents 4,882 Investment securities available-for-sale 48,091 Restricted investments 551 Loans 153,692 Premises and equipment 3,622 Core deposit intangible 3,670 Prepaid and other assets 3,944 Deposits (185,259 ) FHLB advances and other borrowings (10,257 ) Payables and other liabilities (276 ) Total fair value of net assets acquired 22,660 Goodwill $ 7,476
Tennessee Bancshares [Member]
Business Acquisition [Line Items]
Schedule of Business Acquisitions	The following table details the financial impact of the merger, including the calculation of the purchase price, the allocation of the purchase price to the fair values of net assets assumed, and goodwill recognized: Calculation of Purchase Price Shares of SMBK common stock issued to TN Bancshares shareholders as of May 1, 2018 1,458,981 Market price of SMBK common stock on May 1, 2018 $ 23.85 Estimated fair value of SMBK common stock issued (in thousands) 34,797 Cash consideration paid (in thousands) 5 Total consideration (in thousands) $ 34,802 Allocation of Purchase Price (in thousands) Total consideration above $ 34,802 Fair value of assets acquired and liabilities assumed: Cash and cash equivalents 5,723 Investment securities available-for-sale 24,563 Restricted investments 464 Loans 180,490 Premises and equipment 9,470 Core deposit intangible 2,290 Other real estate owned 674 Prepaid and other assets 2,207 Deposits (202,272 ) FHLB advances and other borrowings (4,000 ) Payables and other liabilities (586 ) Total fair value of net assets acquired 19,023 Goodwill $ 15,779
Capstone Bancshares Inc. [Member]
Business Acquisition [Line Items]
Schedule of Business Acquisitions	The following table details the financial impact of the merger, including the calculation of the purchase price, the allocation of the purchase price to the fair values of net assets assumed, and goodwill recognized: Calculation of Purchase Price Shares of SMBK common stock issued to Capstone shareholders as of November 1, 2017 2,908,094 Market price of SMBK common stock on November 1, 2017 $ 23.49 Estimated fair value of SMBK common stock issued (in thousands) 68,311 Estimated fair value of Capstone stock options (in thousands) 1,585 Cash consideration paid (in thousands) 15,826 Total consideration (in thousands) $ 85,722 Allocation of Purchase Price (in thousands) Total consideration above $ 85,722 Fair value of assets acquired and liabilities assumed: Cash and cash equivalents 16,810 Investment securities available for sale 51,638 Restricted investments 1,049 Loans 413,012 Premises and equipment 8,668 Bank owned life insurance 10,031 Core deposit intangible 5,530 Other real estate owned 410 Prepaid and other assets 6,360 Deposits (454,154 ) FHLB advances and other borrowings (4,887 ) Payables and other liabilities (6,803 ) Total fair value of net assets acquired 47,664 Goodwill $ 38,058
Atlantic Capital Bank, N.A. [Member]
Business Acquisition [Line Items]
Schedule of Business Acquisitions	he following table details the financial impact of the transaction, including the allocation of the purchase price to the fair values of net assets assumed and goodwill recognized: Allocation of Purchase Price (in thousands) Total consideration in cash $ 1,183 Fair value of assets acquired and liabilities assumed: Cash and cash equivalents 133 Loans 24,073 Premises and equipment 2,839 Core deposit intangible 310 Prepaid and other assets 77 Deposits (26,888 ) Payables and other liabilities (21 ) Total fair value of net assets acquired 523 Goodwill $ 660

Securities (Tables)

Securities (Tables)	12 Months Ended
	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Schedule of Available-for-sale Securities Reconciliation	The amortized cost and fair value of securities available-for-sale at December 31, 2018 and 2017 are summarized as follow (in thousands): December 31, 2018 Amortized Gross Gross Fair U.S. Government-sponsored enterprises (GSEs) $ 44,117 $ 12 $ (626 ) $ 43,503 Municipal securities 55,248 276 (363 ) 55,161 Other debt securities 977 — (67 ) 910 Mortgage-backed securities 103,875 153 (1,914 ) 102,114 Total $ 204,217 $ 441 $ (2,970 ) $ 201,688 December 31, 2017 Amortized Gross Gross Fair U.S. Government-sponsored enterprises (GSEs) $ 26,207 $ 1 $ (432 ) $ 25,776 Municipal securities 9,122 28 (147 ) 9,003 Other debt securities 974 — (24 ) 950 Mortgage-backed securities 117,263 136 (1,184 ) 116,215 Total $ 153,566 $ 165 $ (1,787 ) $ 151,944
Investments Classified by Contractual Maturity Date	The amortized cost and estimated market value of securities at December 31, 2018 , by contractual maturity, are shown below (in thousands). Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Amortized Fair Due in one year or less $ — $ — Due from one year to five years 36,112 35,780 Due from five years to ten years 14,588 14,145 Due after ten years 49,642 49,649 100,342 99,574 Mortgage-backed securities 103,875 102,114 Total $ 204,217 $ 201,688
Schedule of Unrealized Loss on Investments	The following tables present the gross unrealized losses and fair value, aggregated by investment category and length of time that individual securities available-for-sale have been in a continuous unrealized loss position, as of December 31, 2018 and 2017 (in thousands): As of December 31, 2018 Less than 12 Months 12 Months or Greater Total Fair Gross Fair Gross Fair Gross U.S. Government- sponsored enterprises (GSEs) $ 14,763 $ (237 ) $ 13,728 $ (389 ) $ 28,491 $ (626 ) Municipal securities 16,455 (150 ) 4,767 (213 ) 21,222 (363 ) Other debt securities — — 910 (67 ) 910 (67 ) Mortgage-backed securities 10,516 (155 ) 69,884 (1,759 ) 80,400 (1,914 ) Total $ 41,734 $ (542 ) $ 89,289 $ (2,428 ) $ 131,023 $ (2,970 ) As of December 31, 2017 Less than 12 Months 12 Months or Greater Total Fair Gross Fair Gross Fair Gross U.S. Government- sponsored enterprises (GSEs) $ 1,358 $ (1 ) $ 13,420 $ (431 ) $ 14,778 $ (432 ) Municipal securities 3,418 (43 ) 2,112 (104 ) 5,530 (147 ) Other debt securities 950 (24 ) — — 950 (24 ) Mortgage-backed securities 61,332 (407 ) 35,048 (777 ) 96,380 (1,184 ) Total $ 67,058 $ (475 ) $ 50,580 $ (1,312 ) $ 117,638 $ (1,787 )
Schedule of Realized Gain (Loss) on Available-for-sale Securities	Sales of available-for-sale securities for the years ended December 31, 2018 and 2017 , were as follows (in thousands): 2018 2017 Proceeds $ 2,970 $ 12,614 Gains realized 1 145 Losses realized — 2

Loans and Allowance for Loan _2

Loans and Allowance for Loan Losses (Tables)	12 Months Ended
	Dec. 31, 2018
Receivables [Abstract]
Schedule of Loans	At December 31, 2018 and 2017 , loans consisted of the following (in thousands): December 31, 2018 December 31, 2017 PCI All Other Total PCI All Other Total Commercial real estate $ 17,682 $ 842,345 $ 860,027 $ 17,903 $ 625,085 $ 642,988 Consumer real estate 8,712 398,542 407,254 7,450 286,007 293,457 Construction and land development 4,602 183,293 187,895 5,120 130,289 135,409 Commercial and industrial 2,557 305,697 308,254 858 237,229 238,087 Consumer and other 605 13,204 13,809 1,463 11,854 13,317 Total loans 34,158 1,743,081 1,777,239 32,794 1,290,464 1,323,258 Less: Allowance for loan losses — (8,275 ) (8,275 ) (16 ) (5,844 ) (5,860 ) Loans, net $ 34,158 $ 1,734,806 $ 1,768,964 $ 32,778 $ 1,284,620 $ 1,317,398
Schedule of Impaired and Performing Loans Receivable	The composition of loans by loan classification for impaired and performing loan status at December 31, 2018 and 2017 , is summarized in the tables below (amounts in thousands): December 31, 2018 Commercial Consumer Construction Commercial Consumer Total Performing loans $ 841,709 $ 397,306 $ 182,746 $ 304,673 $ 13,088 $ 1,739,522 Impaired loans 636 1,236 547 1,024 116 3,559 842,345 398,542 183,293 305,697 13,204 1,743,081 PCI loans 17,682 8,712 4,602 2,557 605 34,158 Total $ 860,027 $ 407,254 $ 187,895 $ 308,254 $ 13,809 $ 1,777,239 December 31, 2017 Commercial Consumer Construction Commercial Consumer Total Performing loans $ 624,638 $ 284,585 $ 129,742 $ 237,016 $ 11,842 $ 1,287,823 Impaired loans 447 1,422 547 213 12 2,641 625,085 286,007 130,289 237,229 11,854 1,290,464 PCI loans 17,903 7,450 5,120 858 1,463 32,794 Total loans $ 642,988 $ 293,457 $ 135,409 $ 238,087 $ 13,317 $ 1,323,258
Schedule of Allowance for Loan Losses for Impaired and Performing Loans Receivable	The following tables show the allowance for loan losses allocation by loan classification for impaired and performing loans as of December 31, 2018 and 2017 (amounts in thousands): December 31, 2018 Construction Commercial Consumer Commercial Consumer and Land and and Real Estate Real Estate Development Industrial Other Total Performing loans $ 3,639 $ 1,763 $ 795 $ 1,304 $ 240 $ 7,741 PCI loans — — — — — — Impaired loans — 26 — 442 66 534 Total $ 3,639 $ 1,789 $ 795 $ 1,746 $ 306 $ 8,275 Credit Risk Management (continued): December 31, 2017 Construction Commercial Consumer Commercial Consumer and Land and and Real Estate Real Estate Development Industrial Other Total Performing loans $ 2,444 $ 1,340 $ 521 $ 890 $ 204 $ 5,399 PCI Loans 16 — — — — 16 Impaired loans 5 256 — 172 12 445 Total $ 2,465 $ 1,596 $ 521 $ 1,062 $ 216 $ 5,860
Schedule of Loan Receivable Allowance For Credit Losses	The following tables detail the changes in the allowance for loan losses for the year ending December 31, 2018 and December 31, 2017 , by loan classification (amounts in thousands): December 31, 2018 Commercial Consumer Construction Commercial Consumer Total Beginning balance $ 2,465 $ 1,596 $ 521 $ 1,062 $ 216 $ 5,860 Loans charged off (38 ) (275 ) — (177 ) (370 ) (860 ) Recoveries of loans charged off 2 100 9 72 156 339 Provision (reallocation) charged to operating expense 1,210 368 265 789 304 2,936 Ending balance $ 3,639 $ 1,789 $ 795 $ 1,746 $ 306 $ 8,275 December 31, 2017 Commercial Consumer Construction Commercial Consumer Total Beginning balance $ 2,369 $ 1,382 $ 717 $ 520 $ 117 $ 5,105 Loans charged off — (111 ) — (24 ) (141 ) (276 ) Recoveries of loans charged off 8 99 13 67 61 248 Provision (reallocation) charged to operating expense 88 226 (209 ) 499 179 783 Ending balance $ 2,465 $ 1,596 $ 521 $ 1,062 $ 216 $ 5,860
Loan Credit Quality Indicators	The following tables outline the amount of each loan classification and the amount categorized into each risk rating as of December 31, 2018 and 2017 (amounts in thousands): Non PCI Loans December 31, 2018 Commercial Consumer Construction Commercial Consumer Total Pass $ 834,912 $ 394,728 $ 182,524 $ 303,805 $ 12,927 $ 1,728,896 Watch 6,791 2,678 64 1,090 135 10,758 Special mention — 14 158 137 — 309 Substandard 642 1,122 547 462 142 2,915 Doubtful — — — 203 — 203 Total $ 842,345 $ 398,542 $ 183,293 $ 305,697 $ 13,204 $ 1,743,081 Credit Risk Management (continued): PCI Loans December 31, 2018 Commercial Consumer Construction Commercial Consumer Total Pass $ 14,050 $ 5,617 $ 4,033 $ 2,382 $ 541 $ 26,623 Watch 1,805 756 569 — 17 3,147 Special mention 1,030 446 — 50 10 1,536 Substandard 797 1,893 — 125 37 2,852 Doubtful — — — — — — Total $ 17,682 $ 8,712 $ 4,602 $ 2,557 $ 605 $ 34,158 Total loans $ 860,027 $ 407,254 $ 187,895 $ 308,254 $ 13,809 $ 1,777,239 Non PCI Loans December 31, 2017 Commercial Consumer Construction Commercial Consumer Total Pass $ 616,028 $ 279,464 $ 129,359 $ 233,942 $ 11,624 $ 1,270,417 Watch 7,673 2,543 383 3,007 62 13,668 Special mention 1,006 2,627 — 64 155 3,852 Substandard 378 1,159 547 157 — 2,241 Doubtful — 214 — 59 13 286 Total $ 625,085 $ 286,007 $ 130,289 $ 237,229 $ 11,854 $ 1,290,464 PCI Loans December 31, 2017 Commercial Consumer Construction Commercial Consumer Total Pass $ 14,386 $ 4,151 $ 4,134 $ 68 $ 819 $ 23,558 Watch 261 1,345 649 120 262 2,637 Special mention — 456 — 58 24 538 Substandard 3,084 1,192 337 588 107 5,308 Doubtful 172 306 — 24 251 753 Total $ 17,903 $ 7,450 $ 5,120 $ 858 $ 1,463 $ 32,794 Total loans $ 642,988 $ 293,457 $ 135,409 $ 238,087 $ 13,317 $ 1,323,258
Past Due Loans and Leases	The following tables present the aging of the recorded investment in loans and leases as of December 31, 2018 and 2017 (amounts in thousands): December 31, 2018 30-59 Days 60-89 Days Past Due and Accruing Past Due 90 Nonaccrual Total PCI Loans Current Total Commercial real estate $ 377 $ 19 $ — $ 272 $ 668 $ 17,682 $ 841,677 $ 860,027 Consumer real estate 1,168 462 454 844 2,928 8,712 395,614 407,254 Construction and land development 343 — — 547 890 4,602 182,403 187,895 Commercial and industrial 155 — 101 909 1,165 2,557 304,532 308,254 Consumer and other 117 — 29 124 270 605 12,934 13,809 Total $ 2,160 $ 481 $ 584 $ 2,696 $ 5,921 $ 34,158 $ 1,737,160 $ 1,777,239 December 31, 2017 30-59 Days 60-89 Days Past Due and Accruing Past Due 90 Nonaccrual Total PCI Current Total Commercial real estate $ 517 $ — $ 728 $ 128 $ 1,373 $ 17,903 $ 623,712 $ 642,988 Consumer real estate 769 194 33 991 1,987 7,450 284,020 293,457 Construction and land development 65 — 326 547 938 5,120 129,351 135,409 Commercial and industrial 86 200 131 85 502 858 236,727 238,087 Consumer and other 109 56 291 13 469 1,463 11,385 13,317 Total $ 1,546 $ 450 $ 1,509 $ 1,764 $ 5,269 $ 32,794 $ 1,285,195 $ 1,323,258
Impaired Loans	The following is an analysis of the impaired loan portfolio detailing the related allowance recorded as of and for the years ended December 31, 2018 and 2017 (amounts in thousands): For the year ended At December 31, 2018 December 31, 2018 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized Impaired loans without a valuation allowance: Non PCI Loans: Commercial real estate $ 636 $ 648 $ — $ 855 $ 33 Consumer real estate 1,073 1,089 — 934 29 Construction and land development 547 547 — 547 — Commercial and industrial 69 70 — 69 6 Consumer and other 29 33 — 15 3 2,354 2,387 — 2,420 71 PCI loans: None in 2018 Impaired loans with a valuation allowance: Non PCI Loans: Commercial real estate — — — — — Consumer real estate 163 205 26 365 — Construction and land development — — — — — Commercial and industrial 955 973 442 476 37 Consumer and other 87 87 66 86 3 1,205 1,265 534 927 40 PCI loans: Commercial real estate — — — 11 — Total impaired loans $ 3,559 $ 3,652 $ 534 $ 3,358 $ 111 Impaired Loans (continued): For the year ended At December 31, 2017 December 31, 2017 Recorded Investment Unpaid Principal Balance Related Allowance Average Recorded Investment Interest Income Recognized Impaired loans without a valuation allowance: Non PCI Loans: Commercial real estate $ 424 $ 454 $ — $ 204 $ 44 Consumer real estate 415 420 — 401 16 Construction and land development 547 547 — 628 — Commercial and industrial 41 41 — 44 3 Consumer and other — — — — — 1,427 1,462 — 1,277 63 PCI loans: None in 2017 Impaired loans with a valuation allowance: Non PCI Loans: Commercial real estate 23 23 5 5 1 Consumer real estate 1,007 1,033 256 601 38 Construction and land development — — — — — Commercial and industrial 172 172 172 117 10 Consumer and other 12 13 12 2 1 1,214 1,241 445 725 50 PCI loans: Commercial real estate 16 123 16 3 16 Total impaired loans $ 2,657 $ 2,826 $ 461 $ 2,005 $ 129
Troubled Debt Restructurings on Loans	The following table presents a summary of loans that were modified as troubled debt restructurings during the year ended December 31, 2018 (amounts in thousands): December 31, 2018 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment Commercial real estate 1 $ 62 $ 62 Commercial and industrial 1 18 18
Certain Loans Acquired In Transfer Not Accounted For As Debt Securities, Acquired During Period Carrying Amount Of Loans	The Company has acquired loans which there was, at acquisition, evidence of deterioration of credit quality since origination and it was probable, at acquisition, that all contractually required payments would not be collected. The carrying amount of those loans at for the years ended December 31, 2018 and 2017 is as follows (in thousands): 2018 2017 Commercial real estate $ 24,849 $ 23,366 Consumer real estate 11,108 10,764 Construction and land development 5,731 6,285 Commercial and industrial 5,824 1,452 Consumer and other 892 1,710 Total loans $ 48,404 $ 43,577 Less remaining purchase discount (14,246 ) (10,783 ) Total, gross 34,158 32,794 Less: Allowance for loan losses — (16 ) Carrying amount, net of allowance $ 34,158 $ 32,778
Schedule of Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield Movement	The following is a summary of the accretable discount on acquired loans for the years ended December 31, 2018 and 2017 (in thousands): 2018 2017 Accretable yield, beginning of period $ 9,287 $ 8,950 Additions 2,416 2,581 Accretion income (5,368 ) (4,217 ) Reclassification from nonaccretable 1,494 926 Other changes, net (777 ) 1,047 Accretable yield, end of period $ 7,052 $ 9,287
Schedule of Certain Loans Acquired Accounted For As Debt Securities Acquired During Period	Purchased credit impaired loans acquired from TN Bancshares during the year ended December 31, 2018 for which it was probable at acquisition that all contractually required payments would not be collected are as follows (in thousands): 2018 Contractual principal and interest at acquisition $ 15,133 Nonaccretable difference 5,302 Expected cash flows at acquisition 9,831 Accretable yield 1,292 Basis in PCI loans at acquisition-estimated fair value $ 8,539
Schedule of Loan to Directors, Officers and Affiliated Parties	A summary of activity in loans to related parties is as follows (in thousands): 2018 2017 Balance, beginning of year $ 18,330 $ 12,999 Disbursements 34,639 14,533 Repayments (21,723 ) (9,202 ) Balance, end of year $ 31,246 $ 18,330

Premises and Equipment (Tables)

Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Summary of Premises and Equipment	Buildings and leasehold improvements 15 - 40 years Furniture and equipment 3-7 years A summary of premises and equipment at December 31, 2018 and 2017 , is as follows (in thousands): 2018 2017 Land and land improvements $ 14,712 $ 10,854 Building and leasehold improvements 36,640 28,576 Furniture, fixtures and equipment 12,318 10,073 Construction in progress 2,875 1,495 Total, gross 66,545 50,998 Accumulated depreciation (10,533 ) (7,998 ) Total, net $ 56,012 $ 43,000
Schedule of Future Minimum Rental Payments for Operating Leases	At December 31, 2018 , the remaining minimum lease payments relating to these leases were as follows (in thousands): 2019 $ 644 2020 622 2021 462 2022 259 2023 121 Thereafter 864 Total $ 2,972

Deposits (Tables)

Deposits (Tables)	12 Months Ended
	Dec. 31, 2018
Deposits [Abstract]
Scheduled Maturities Of Time Deposit	At December 31, 2018 , the scheduled maturities of time deposits are as follows (in thousands): 2019 $ 449,948 2020 120,376 2021 28,094 2022 20,446 2023 29,053 Thereafter — Total $ 647,917

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Finite-Lived Intangible Assets	The following table presents information about our core deposit premium intangible asset at December 31 (in thousands): 2018 2017 Gross Accumulated Gross Accumulated Amortized intangible asset: Core deposit intangible $ 14,549 $ 1,602 $ 8,589 $ 626
Finite-lived Intangible Assets Amortization Expense	The following table presents information about aggregate amortization expense for 2018 and 2017 and for the succeeding fiscal years as follows (in thousands): 2018 2017 Aggregate amortization expense of core deposit premium intangible $ 976 $ 346
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	Estimated aggregate amortization expense of the core deposit premium intangible for the year ending December 31 (in thousands): 2019 $ 1,368 2020 1,351 2021 1,334 2022 1,317 2023 1,301 Thereafter 6,276 Total $ 12,947

Federal Home Loan Bank Advanc_2

Federal Home Loan Bank Advances and Other Borrowings (Tables)	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Scheduled Maturities Of Federal Home Loan Bank Advances and Other Borrowings	At December 31, 2018, scheduled maturities of the federal funds purchased of $10.8 million , and other borrowings of $480.3 thousand are as follows (amounts in thousands): 2019 $ 10,803 2020 43 2021 45 2022 47 2023 50 Thereafter 254 Total $ 11,242

Income Taxes (Table)

Income Taxes (Table)	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense (Benefit)	Income tax expense in the consolidated statements of income for the years ended December 31, 2018 and 2017 , includes the following (in thousands): 2018 2017 Current tax expense Federal $ 661 $ 1,962 State 141 428 Deferred tax expense (benefit) related to: Federal 1,992 1,441 State 439 158 Change in tax rate — 2,440 Total income tax expense $ 3,233 $ 6,429
Schedule of Effective Income Tax Rate Reconciliation	The income tax expense is different from the expected tax expense computed by multiplying income before income tax expense by the statutory income tax rate of 21 percent in 2018 and 34 percent in 2017. The reasons for this difference are as follows (in thousands): 2018 2017 Federal income tax expense computed at the statutory rate $ 4,481 $ 3,891 State income taxes, net of federal tax benefit 551 491 Nondeductible acquisition expenses 138 364 Tax benefit from stock options (1,786 ) — Change in tax rate — 2,440 Other (151 ) (757 ) Total income tax expense $ 3,233 $ 6,429
Schedule of Deferred Tax Assets and Liabilities	The components of the net deferred tax asset as of December 31, 2018 and 2017 , were as follows (in thousands): 2018 2017 Deferred tax assets: Allowance for loan losses $ 2,172 $ 1,561 Fair value adjustments 6,086 4,829 Unrealized losses on investment securities 659 424 Unrealized losses on hedges 280 — Foreclosed real estate 271 301 Deferred compensation 833 849 Federal net operating loss carryforward 350 — Other 440 849 Total deferred tax assets 11,091 8,813 Deferred tax liabilities: Accumulated depreciation 1,875 1,194 Core deposit intangible 3,332 1,945 Other 286 223 Total deferred tax liabilities 5,493 3,362 Net deferred tax asset $ 5,598 $ 5,451

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2018
Defined Benefit Plan [Abstract]
Schedule of Option Activity	A summary of the status of these stock option plans is presented in the following table: Number Weighted Average Exercisable Price Outstanding at December 31, 2017 316,574 $ 11.82 Granted — — Exercised (132,783 ) 11.39 Forfeited (13,166 ) 31.96 Outstanding at December 31, 2018 170,625 $ 10.61 Number Weighted Average Exercisable Price Outstanding at December 31, 2016 717,524 $ 10.57 Granted — — Exercised (506,923 ) 9.64 Forfeited (24,496 ) 19.90 Capstone options assumed in business combination 130,469 11.76 Outstanding at December 31, 2017 316,574 $ 11.82
Schedule of Options Outstanding by Exercise Price Range	Information pertaining to options outstanding at December 31, 2018 , is as follows: Options Outstanding Options Exercisable Weighted- Average Remaining Weighted- Average Weighted- Average Exercise Number Contractual Exercise Number Exercise Prices Outstanding Life Price Exercisable Price 6.60 30,000 3.2 years 6.60 30,000 6.60 6.80 14,250 2.2 years 6.80 14,250 6.80 9.48 25,625 4.2 years 9.48 25,625 9.48 9.60 35,125 5.2 years 9.60 35,125 9.60 11.76 13,599 2.4 years 11.76 13,599 11.76 14.40 11,792 0.2 years 14.40 11,792 14.40 15.05 40,234 6.8 years 15.05 26,827 15.05 Outstanding, end of year 170,625 4.2 years 10.61 157,218 10.23
Schedule of Non-vested Options	Information related to non-vested options for the period ended December 31, 2018 , is as follows: Number Weighted Average Grant-Date Fair Value Nonvested at December 31, 2017 23,455 $ 12.31 Granted — — Vested (13,346 ) 15.05 Forfeited/expired 3,298 15.05 Nonvested at December 31, 2018 13,407 $ 15.05
Schedule of Non-vested Restricted Stock Awards	The following table summarizes activity relating to non-vested restricted stock awards: Number Nonvested at December 31, 2017 27,500 Granted 7,553 Vested (5,553 ) Forfeited/expired — Nonvested at December 31, 2018 29,500

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Other Commitments	A summary of the Company's total contractual amount for all off-balance sheet commitments at December 31, 2018 is as follows: Commitments to extend credit $ 333.9 million Standby letters of credit 12.2 million

Regulatory Matters (Tables)

Regulatory Matters (Tables)	12 Months Ended
	Dec. 31, 2018
Banking and Thrift [Abstract]
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations	Actual and required capital levels at December 31, 2018 and 2017 are presented below (dollars in thousands): are Actual Minimum for capital adequacy purposes Minimum to be well capitalized under prompt corrective action provisions (1) Amount Ratio Amount Ratio Amount Ratio December 31, 2018 SmartFinancial, Inc. (2) SmartBank Total Capital (to Risk-Weighted Assets) $ 243,774 12.74 % $ 153,017 8.00 % $ 191,271 10.00 % Tier 1 Capital (to Risk-Weighted Assets) 235,499 12.31 % 114,763 6.00 % 153,017 8.00 % Common Equity Tier 1 Capital (to Risk-Weighted Assets) 235,499 12.31 % 86,072 4.50 % 124,326 6.50 % Tier 1 Capital (to Average Assets) 235,499 11.17 % 84,300 4.00 % 105,375 5.00 % (1) The prompt corrective action provisions are applicable at the Bank level only. (2) Reporting regulations were revised during 2018 the capital ratios reported for SmartFinancial Inc. at December 31, 2017 were not required to be reported at December 31, 2018. Regulatory Capital Levels (continued): Actual Minimum for capital Minimum to be well Amount Ratio Amount Ratio Amount Ratio December 31, 2017 SmartFinancial, Inc. Total Capital (to Risk-Weighted Assets) $ 163,683 10.98 % $ 119,257 8.00 % Tier 1 Capital (to Risk-Weighted Assets) 157,823 10.59 % 89,442 6.00 % Common Equity Tier 1 Capital (to Risk-Weighted Assets) 157,823 10.59 % 67,082 4.50 % Tier 1 Capital (to Average Assets) 157,823 10.78 % 58,562 4.00 % SmartBank Total Capital (to Risk-Weighted Assets) $ 168,148 11.29 % $ 119,111 8.00 % $ 148,889 10.00 % Tier 1 Capital (to Risk-Weighted Assets) 162,288 10.90 % 89,333 6.00 % 119,111 8.00 % Common Equity Tier 1 Capital (to Risk-Weighted Assets) 162,288 10.90 % 67,000 4.50 % 96,778 6.50 % Tier 1 Capital (to Average Assets) 162,288 11.26 % 57,656 4.00 % 72,070 5.00 % (1) The prompt corrective action provisions are applicable at the Bank level only.

Fair Value of Assets and Liab_2

Fair Value of Assets and Liabilities (Tables)	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	Assets recorded at fair value on a recurring basis are as follows, in thousands Balance as of Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Other Unobservable Inputs (Level 3) Securities available-for-sale: U.S. Government-sponsored enterprises (GSEs) $ 43,503 $ — $ 43,503 $ — Municipal securities 55,161 — 55,161 — Other debt securities 910 — 910 — Mortgage-backed securities 102,114 — 102,114 — Total securities available-for-sale $ 201,688 $ — $ 201,688 $ — Derivative financial instruments $ 1,174 $ — $ 1,174 Balance as of Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Other Unobservable Inputs (Level 3) Securities available-for-sale: U.S. Government-sponsored enterprises (GSEs) $ 25,776 $ — $ 25,776 $ — Municipal securities 9,003 — 9,003 — Other debt securities 950 — 950 — Mortgage-backed securities 116,215 — 116,215 — Total securities available-for-sale $ 151,944 $ — $ 151,944 $ —
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis	For Level 3 assets measured at fair value on a non-recurring basis as of December 31, 2018 and 2017 , the significant unobservable inputs used in the fair value measurements are presented below. Balance as of Valuation Technique Significant Other Unobservable Input Weighted Average of Input Impaired loans $ 671 Third Party Appraisal Appraisal Discounts 44.3 % Foreclosed assets 2,495 Third Party Appraisal Appraisal Discounts 23.3 % Balance as of Valuation Technique Significant Other Unobservable Input Weighted Average of Input Impaired loans $ 769 Cash Flow Discounted Cash Flow / Appraisal Discounts 35.5 % Foreclosed assets 3,254 Appraisal Appraisal Discounts 17.8 % The following tables present the financial instruments carried on the consolidated balance sheets by caption and by level in the fair value hierarchy, for which a nonrecurring change in fair value has been recorded (in thousands): Balance as of Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Other Unobservable Inputs (Level 3) Impaired loans $ 671 $ — $ — $ 671 Foreclosed assets 2,495 — — 2,495 Balance as of Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Other Unobservable Inputs (Level 3) Impaired loans $ 769 $ — $ — $ 769 Foreclosed assets 3,254 — — 3,254
Fair Value, by Balance Sheet Grouping	The carrying amount and estimated fair value of the Company’s financial instruments at December 31, 2018 and December 31, 2017 are as follows (in thousands): December 31, 2018 Fair Value Measurements Using Carrying Amount Level 1 Level 2 Level 3 Estimated Fair Value Assets: Cash and cash equivalents $ 115,822 115,822 — — $ 115,822 Securities available-for-sale 201,688 — 201,688 — 201,688 Restricted investments 11,499 N/A N/A N/A N/A Loans, net 1,768,964 — — 1,766,838 1,766,838 Liabilities: Noninterest-bearing demand deposits 319,861 — 319,861 — 319,861 Interest-bearing demand deposits 311,482 — 311,482 — 311,482 Money Market and Savings deposits 641,945 — 641,945 — 641,945 Time deposits 648,675 — 649,169 — 649,169 Securities sold under agreements to repurchase 11,756 — 11,756 — 11,756 Federal Home Loan Bank advances and other borrowings 11,243 — 11,243 — 11,243 Subordinated debt 39,177 — — 39,190 39,158 39,190 Derivative financial instruments 1,174 — 1,174 — 1,174 December 31, 2017 Fair Value Measurements Using Carrying Amount Level 1 Level 2 Level 3 Estimated Fair Value Assets: Cash and cash equivalents $ 113,027 113,027 — — $ 113,027 Securities available-for-sale 151,944 — 151,944 — 151,944 Restricted investments 6,431 N/A N/A N/A N/A Loans, net 1,317,398 — — 1,292,303 1,292,303 Liabilities: Noninterest-bearing demand deposits 220,520 — 220,520 — 220,520 Interest-bearing demand deposits 231,644 — 231,644 — 231,644 Money Market and Savings deposits 543,645 — 543,645 — 543,645 Time deposits 442,774 — 443,547 — 443,547 Securities sold under agreements to repurchase 24,055 — 24,055 — 24,055 Federal Home Loan Bank advances and other borrowings 43,600 — 43,600 — 43,600

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The effect from the stock options and restricted stock on incremental shares from the assumed conversions for net income per share-basic and net income per share-diluted are presented below. There were antidilutive shares of 13,166 for the year ended December 31, 2017. There were no antidulutive shares at December 31, 2018. (Dollars in thousands, except share amounts) 2018 2017 Basic earnings per share computation: Net income available to common stockholders $ 18,102 $ 4,820 Average common shares outstanding – basic 12,423,618 8,639,212 Basic earnings per share $ 1.46 $ 0.56 Diluted earnings per share computation: Net income available to common stockholders $ 18,102 $ 4,820 Average common shares outstanding – basic 12,423,618 8,639,212 Incremental shares from assumed conversions: Stock options and restricted stock 94,022 154,315 Average common shares outstanding - diluted 12,517,640 8,793,527 Diluted earnings per share $ 1.45 $ 0.55

Condensed Parent Information (T

Condensed Parent Information (Tables)	12 Months Ended
	Dec. 31, 2018
Condensed Financial Information Disclosure [Abstract]
Condensed Balance Sheet	CONDENSED BALANCE SHEETS December 31, December 31, 2018 2017 ASSETS Cash $ 13,684 $ 3,936 Investment in subsidiaries 308,422 168,104 Other assets 99 42,766 Total assets $ 322,205 $ 214,806 LIABILITIES AND STOCKHOLDERS’ EQUITY Other liabilities $ 17 $ (1,046 ) Other borrowings 39,177 10,000 Total liabilities 39,194 8,954 Stockholders’ equity 283,011 205,852 Total liabilities and stockholders’ equity $ 322,205 $ 214,806
Condensed Income Statement	CONDENSED STATEMENTS OF INCOME Years Ended December 31, 2018 2017 INCOME Interest income $ 21 $ — EXPENSES Interest expense 1,005 69 Other operating expenses 2,822 2,657 (Loss) before equity in undistributed earnings of subsidiaries and income tax benefit (3,806 ) (2,726 ) Equity in undistributed earnings of subsidiaries 22,741 7,134 Income tax (benefit) expense (833 ) 607 Net income 18,102 5,015 Preferred stock dividend requirements — 195 Net income available to common stockholders $ 18,102 $ 4,820
Condensed Cash Flow Statement	STATEMENTS OF CASH FLOWS Years Ended December 31, 2018 2017 CASH FLOWS FROM OPERATING ACTIVITIES Net income $ 18,102 $ 5,015 Adjustments to reconcile net income to net cash (used in) provided by operating activities: Equity in undistributed income of subsidiary (22,741 ) (7,134 ) Other 1,631 (2,449 ) Net cash used in operating activities (3,008 ) (4,568 ) CASH FLOWS FROM FINANCING ACTIVITIES Proceeds from issuance of note payable — 10,000 Repayment of note payable (10,000 ) — Redemption of preferred stock — (12,000 ) Issuance of subordination debt 39,158 — Proceeds from issuance of common stock 1,528 37,853 Payment of dividends on preferred stock — (195 ) Net cash provided by financing activities 30,686 35,658 CASH FLOWS FROM INVESTING ACTIVITIES Net cash paid for business combinations (5,930 ) (14,222 ) Equity contribution to subsidiary (12,000 ) (15,000 ) Net cash used in investing activities (17,930 ) (29,222 ) NET INCREASE IN CASH AND CASH EQUIVALENTS 9,748 1,868 CASH AND CASH EQUIVALENTS, beginning of year 3,936 2,068 CASH AND CASH EQUIVALENTS, end of year $ 13,684 $ 3,936

Derivatives (Tables)

Derivatives (Tables)	12 Months Ended
	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Fair Value Hedge Relationships in Balance Sheet	A summary of the Company's fair value hedge relationships as of December 31, 2018 are as follows (in thousands): December 31, 2018 Balance Sheet Location Weighted Average Remaining Maturity (In Years) Weighted Average Pay Rate Receive Rate Notional Amount Estimated Fair Value Liability derivatives Interest rate swap agreements - securities Other liabilities 9.23 3.10% 3 month LIBOR $35,000 -$1,174
Schedule of Fair Value Hedge Relationships on Income Statement	The effects of the Company's fair value hedge relationships on the income statement during the twelve months ended December 31, 2018 were as follows (in thousands): Twelve Months Ended December 31, 2018 Interest Income Total amount of income and expense line items presented in the consolidated statements of income $92,210 Gain (loss) on fair value hedging relationship Interest rate swap agreements - securities: Hedged items (1,174) Derivative designated as hedging instruments 1,174
Schedule of Fair Value Hedges	The following amounts were recorded on the balance sheet related to cumulative basis adjustments for fair value hedges at December 31, 2018 : Carrying Amount of the Hedged Assets (in thousands) Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets Line item on the balance sheet December 31, 2018 December 31, 2018 Securities available-for-sale $39,730 $1,174

Summary of Significant Accoun_4

Summary of Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2018USD ($)segment	Dec. 31, 2017USD ($)	Jan. 01, 2019USD ($)
Accounting Policies [Line Items]
Federal Reserve Bank, reserve requirement	$ 36,700,000	$ 16,500,000
Foreclosed assets	2,495,458	3,254,392
Amortization of intangible assets	976,195	346,435
Impairment of intangible assets	0
Gross interchange and debit card transaction fees	1,600,000	952,000
Network costs	1,000,000	595,000
Interchange and debit card transaction fees	573,194	952,294
Advertising expense	$ 872,547	637,600
Number of reportable segments | segment	1
Residential Real Estate [Member]
Accounting Policies [Line Items]
Foreclosed assets	$ 400,000	546,000
Mortgage loans in process of foreclosure	$ 0	$ 0
Minimum [Member] | Building and Leasehold Improvements [Member]
Accounting Policies [Line Items]
Useful life	15 years
Minimum [Member] | Furniture and Equipment [Member]
Accounting Policies [Line Items]
Useful life	3 years
Maximum [Member] | Building and Leasehold Improvements [Member]
Accounting Policies [Line Items]
Useful life	40 years
Maximum [Member] | Furniture and Equipment [Member]
Accounting Policies [Line Items]
Useful life	7 years
Scenario, Forecast [Member] | Accounting Standards Update 2016-02 [Member] | Subsequent Event [Member]
Accounting Policies [Line Items]
Right-of-use assets			$ 2,600,000
Lease liability			$ 2,700,000

Business Combinations (Textual)

Business Combinations (Textual) (Details) - USD ($) $ / shares in Units, $ in Thousands	Nov. 01, 2018	Oct. 31, 2018	May 01, 2018	Apr. 27, 2018	Nov. 01, 2017	May 19, 2017	Dec. 31, 2018	Dec. 31, 2017	Jan. 15, 2019
Business Acquisition [Line Items]
Common stock, shares outstanding (in shares)							13,933,504	11,152,561
Goodwill							$ 66,100
Foothills Bancorp [Member]
Business Acquisition [Line Items]
Shares issued upon conversion (in shares)	0.666
Cash paid upon conversion (in dollars per share)	$ 1.75
Number of shares issued (in shares)	1,183,232
Cash paid for merger	$ 3,100
Additional consideration transferred	$ 3,000
Consecutive trading days		10 days
Share price (in dollars per share)	$ 20.34
Ownership interest (as a percent)	91.00%
Goodwill	$ 7,476
Pro forma, revenue of acquiree since acquisition date, actual							1,500
Pro forma information, earnings (loss) since acquisition date, actual							876
Pro forma revenue							11,000
Pro forma net income (loss)							1,600
Cash consideration paid	$ 6,069
Tennessee Bancshares [Member]
Business Acquisition [Line Items]
Shares issued upon conversion (in shares)			0.8065
Number of shares issued (in shares)			1,458,981
Consecutive trading days				10 days
Share price (in dollars per share)			$ 23.85
Ownership interest (as a percent)			89.00%
Goodwill			$ 15,779
Pro forma, revenue of acquiree since acquisition date, actual							8,400
Pro forma information, earnings (loss) since acquisition date, actual							3,500
Pro forma revenue							14,700
Pro forma net income (loss)							3,600
Cash consideration paid			$ 5
Fair value adjustment							51
Capstone Bancshares Inc. [Member]
Business Acquisition [Line Items]
Share price (in dollars per share)					$ 23.49
Ownership interest (as a percent)					74.00%
Goodwill					$ 38,058
Pro forma, revenue of acquiree since acquisition date, actual							27,800	$ 5,000
Pro forma information, earnings (loss) since acquisition date, actual							13,500	186
Pro forma revenue								24,900
Pro forma net income (loss)								947
Exchange of shares (in shares)					0.85
Cash payment per share (in dollars per share)					$ 18.50
Percentage of common stock consideration transferred					80.00%
Percentage of cash consideration transferred					20.00%
Goodwill adjustment							11
Cash consideration paid					$ 15,826
Atlantic Capital Bank, N.A. [Member]
Business Acquisition [Line Items]
Goodwill						$ 660
Pro forma, revenue of acquiree since acquisition date, actual							1,600	903
Pro forma information, earnings (loss) since acquisition date, actual							546	$ 63
Cash consideration paid						$ 1,183
Pro Forma [Member] | Foothills Bancorp [Member]
Business Acquisition [Line Items]
Operating expenses							2,300
Pro Forma [Member] | Tennessee Bancshares [Member]
Business Acquisition [Line Items]
Operating expenses							2,000
Pro Forma [Member] | Capstone Bancshares Inc. [Member]
Business Acquisition [Line Items]
Operating expenses							$ 4,600
Weighted Average [Member] | Foothills Bancorp [Member]
Business Acquisition [Line Items]
Share price (in dollars per share)		$ 22.46
Weighted Average [Member] | Tennessee Bancshares [Member]
Business Acquisition [Line Items]
Share price (in dollars per share)				$ 23.92
Subsequent Event [Member] | Entegra Financial Corp [Member]
Business Acquisition [Line Items]
Shares issued upon conversion (in shares)									1.215
Common stock, shares outstanding (in shares)									6,917,703

Business Combinations Business

Business Combinations Business Combinations (Allocation of Purchase Price of Foothills Bancorp) (Details) - USD ($) $ / shares in Units, $ in Thousands	Nov. 01, 2018	Dec. 31, 2018
Fair value of assets acquired and liabilities assumed:
Goodwill		$ 66,100
Foothills Bancorp [Member]
Business Acquisition [Line Items]
Shares of SMBK common stock issued (in shares)	1,183,232
Market price of SMBK common stock (in dollars per share)	$ 20.34
Estimated fair value of SMBK common stock issued	$ 24,067
Cash consideration paid	6,069
Total consideration	30,136
Fair value of assets acquired and liabilities assumed:
Cash and cash equivalents	4,882
Investment securities available for sale	48,091
Restricted investments	551
Loans	153,692
Premises and equipment	3,622
Core deposit intangible	3,670
Prepaid and other assets	3,944
Deposits	(185,259)
FHLB advances and other borrowings	(10,257)
Payables and other liabilities	(276)
Total fair value of net assets acquired	22,660
Goodwill	$ 7,476

Business Combinations (Allocati

Business Combinations (Allocation of Purchase Price of Tennessee Bancshares) (Details) - USD ($) $ / shares in Units, $ in Thousands	May 01, 2018	Dec. 31, 2018
Fair value of assets acquired and liabilities assumed:
Goodwill		$ 66,100
Tennessee Bancshares [Member]
Business Acquisition [Line Items]
Shares of SMBK common stock issued (in shares)	1,458,981
Market price of SMBK common stock (in dollars per share)	$ 23.85
Estimated fair value of SMBK common stock issued	$ 34,797
Cash consideration paid	5
Total consideration	34,802
Fair value of assets acquired and liabilities assumed:
Cash and cash equivalents	5,723
Investment securities available for sale	24,563
Restricted investments	464
Loans	180,490
Premises and equipment	9,470
Core deposit intangible	2,290
Other real estate owned	674
Prepaid and other assets	2,207
Deposits	(202,272)
FHLB advances and other borrowings	(4,000)
Payables and other liabilities	(586)
Total fair value of net assets acquired	19,023
Goodwill	$ 15,779

Business Combinations (Alloca_2

Business Combinations (Allocation of Purchase Price of Capstone Bancshares) (Details) - USD ($)	Nov. 01, 2017	Dec. 31, 2018
Fair value of assets acquired and liabilities assumed:
Goodwill		$ 66,100,000
Capstone Bancshares Inc. [Member]
Business Acquisition [Line Items]
Shares of SMBK common stock issued to Capstone shareholders as of November 1, 2017 (in shares)	$ 2,908,094
Market price of SMBK common stock (in dollars per share)	$ 23.49
Estimated fair value of SMBK common stock issued	$ 68,311,000
Estimated fair value of Capstone stock options	1,585,000
Cash consideration paid	15,826,000
Total consideration	85,722,000
Fair value of assets acquired and liabilities assumed:
Cash and cash equivalents	16,810,000
Investment securities available for sale	51,638,000
Restricted investments	1,049,000
Loans	413,012,000
Premises and equipment	8,668,000
Bank owned life insurance	10,031,000
Core deposit intangible	5,530,000
Other real estate owned	410,000
Prepaid and other assets	6,360,000
Deposits	(454,154,000)
FHLB advances and other borrowings	(4,887,000)
Payables and other liabilities	(6,803,000)
Total fair value of net assets acquired	47,664,000
Goodwill	$ 38,058,000

Business Combinations (Alloca_3

Business Combinations (Allocation of Purchase Price of Atlantic Capital Bank) (Details) - USD ($) $ in Thousands	May 19, 2017	Dec. 31, 2018
Fair value of assets acquired and liabilities assumed:
Goodwill		$ 66,100
Atlantic Capital Bank, N.A. [Member]
Business Acquisition [Line Items]
Cash consideration paid	$ 1,183
Fair value of assets acquired and liabilities assumed:
Cash and cash equivalents	133
Loans	24,073
Premises and equipment	2,839
Core deposit intangible	310
Prepaid and other assets	77
Deposits	(26,888)
Payables and other liabilities	(21)
Total fair value of net assets acquired	523
Goodwill	$ 660

Securities (Amortized Cost and

Securities (Amortized Cost and Fair Value of Available-for-sale Securities) (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Debt securities available-for-sale:
Total	$ 204,217,000	$ 153,566,000
Gross Unrealized Gains	441,000	165,000
Gross Unrealized Losses	(2,970,000)	(1,787,000)
Fair Value	201,687,683	151,944,567
U.S. Government-sponsored enterprises (GSEs) [Member]
Debt securities available-for-sale:
Total	44,117,000	26,207,000
Gross Unrealized Gains	12,000	1,000
Gross Unrealized Losses	(626,000)	(432,000)
Fair Value	43,503,000	25,776,000
Muncipal Securities [Member]
Debt securities available-for-sale:
Total	55,248,000	9,122,000
Gross Unrealized Gains	276,000	28,000
Gross Unrealized Losses	(363,000)	(147,000)
Fair Value	55,161,000	9,003,000
Other Debt Securities [Member]
Debt securities available-for-sale:
Total	977,000	974,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(67,000)	(24,000)
Fair Value	910,000	950,000
Mortgage Backed Securities [Member]
Debt securities available-for-sale:
Total	103,875,000	117,263,000
Gross Unrealized Gains	153,000	136,000
Gross Unrealized Losses	(1,914,000)	(1,184,000)
Fair Value	$ 102,114,000	$ 116,215,000

Securities (Maturities of Avail

Securities (Maturities of Available-for-sale Securities) (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Amortized Cost
Due in one year or less	$ 0
Due from one year to five years	36,112,000
Due from five years to ten years	14,588,000
Due after ten years	49,642,000
Amortized Cost	100,342,000
Total	204,217,000	$ 153,566,000
Fair Value
Due in one year or less	0
Due from one year to five years	35,780,000
Due from five years to ten years	14,145,000
Due after ten years	49,649,000
Fair Value	99,574,000
Total	201,687,683	151,944,567
Mortgage Backed Securities [Member]
Amortized Cost
Amortized Cost	103,875,000
Total	103,875,000	117,263,000
Fair Value
Fair Value	102,114,000
Total	$ 102,114,000	$ 116,215,000

Securities (Available-for-sale

Securities (Available-for-sale Securities in Continuous Loss Position) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Debt securities available-for-sale:
Less than 12 Months, Fair Value	$ 41,734	$ 67,058
Less than 12 Months, Gross Unrealized Losses	(542)	(475)
12 Months or Greater, Fair Value	89,289	50,580
12 Months or Greater, Gross Unrealized Losses	(2,428)	(1,312)
Total, Fair Value	131,023	117,638
Total, Gross Unrealized Losses	2,970	1,787
U.S. Government-sponsored enterprises (GSEs) [Member]
Debt securities available-for-sale:
Less than 12 Months, Fair Value	14,763	1,358
Less than 12 Months, Gross Unrealized Losses	(237)	(1)
12 Months or Greater, Fair Value	13,728	13,420
12 Months or Greater, Gross Unrealized Losses	(389)	(431)
Total, Fair Value	28,491	14,778
Total, Gross Unrealized Losses	626	432
Muncipal Securities [Member]
Debt securities available-for-sale:
Less than 12 Months, Fair Value	16,455	3,418
Less than 12 Months, Gross Unrealized Losses	(150)	(43)
12 Months or Greater, Fair Value	4,767	2,112
12 Months or Greater, Gross Unrealized Losses	(213)	(104)
Total, Fair Value	21,222	5,530
Total, Gross Unrealized Losses	363	147
Other Debt Securities [Member]
Debt securities available-for-sale:
Less than 12 Months, Fair Value	0	950
Less than 12 Months, Gross Unrealized Losses	0	(24)
12 Months or Greater, Fair Value	910	0
12 Months or Greater, Gross Unrealized Losses	(67)	0
Total, Fair Value	910	950
Total, Gross Unrealized Losses	67	24
Mortgage Backed Securities [Member]
Debt securities available-for-sale:
Less than 12 Months, Fair Value	10,516	61,332
Less than 12 Months, Gross Unrealized Losses	(155)	(407)
12 Months or Greater, Fair Value	69,884	35,048
12 Months or Greater, Gross Unrealized Losses	(1,759)	(777)
Total, Fair Value	80,400	96,380
Total, Gross Unrealized Losses	$ 1,914	$ 1,184

Securities (Textual) (Details)

Securities (Textual) (Details) $ in Millions	Dec. 31, 2018USD ($)investment	Dec. 31, 2017USD ($)
Debt Securities, Available-for-sale [Line Items]
Available-for-sale securities pledged as collateral | $	$ 103.7	$ 97.2
U.S. Government-sponsored enterprises (GSEs) [Member]
Debt Securities, Available-for-sale [Line Items]
Securities in unrealized loss positions (Number of investments)	8
Muncipal Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Securities in unrealized loss positions (Number of investments)	22
Other Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Securities in unrealized loss positions (Number of investments)	1
Mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Securities in unrealized loss positions (Number of investments)	66

Securities (Sales of Available-

Securities (Sales of Available-for-sale Securities) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Proceeds	$ 2,970	$ 12,614
Gains realized	1	145
Losses realized	$ 0	$ 2

Loans and Allowance for Loan _3

Loans and Allowance for Loan Losses (Loan Summary) (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 1,777,239,000	$ 1,323,258,000
Less: Allowance for loan losses	(8,275,055)	(5,860,291)	$ (5,105,000)
Loans, net	1,768,963,569	1,317,397,909
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	860,027,000	642,988,000
Less: Allowance for loan losses	(3,639,000)	(2,465,000)	(2,369,000)
Consumer Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	407,254,000	293,457,000
Less: Allowance for loan losses	(1,789,000)	(1,596,000)	(1,382,000)
Construction and Land Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	187,895,000	135,409,000
Less: Allowance for loan losses	(795,000)	(521,000)	(717,000)
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	308,254,000	238,087,000
Less: Allowance for loan losses	(1,746,000)	(1,062,000)	(520,000)
Consumer and Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	13,809,000	13,317,000
Less: Allowance for loan losses	(306,000)	(216,000)	$ (117,000)
Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	34,158,000	32,794,000
Less: Allowance for loan losses	0	(16,000)
Loans, net	34,158,000	32,778,000
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	17,682,000	17,903,000
Less: Allowance for loan losses	0	(16,000)
Purchased Credit Impaired Loans [Member] | Consumer Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	8,712,000	7,450,000
Less: Allowance for loan losses	0	0
Purchased Credit Impaired Loans [Member] | Construction and Land Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	4,602,000	5,120,000
Less: Allowance for loan losses	0	0
Purchased Credit Impaired Loans [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	2,557,000	858,000
Less: Allowance for loan losses	0	0
Purchased Credit Impaired Loans [Member] | Consumer and Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	605,000	1,463,000
Less: Allowance for loan losses	0	0
All Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,743,081,000	1,290,464,000
Less: Allowance for loan losses	(8,275,000)	(5,844,000)
Loans, net	1,734,806,000	1,284,620,000
All Other Loans [Member] | Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	842,345,000	625,085,000
All Other Loans [Member] | Consumer Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	398,542,000	286,007,000
All Other Loans [Member] | Construction and Land Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	183,293,000	130,289,000
All Other Loans [Member] | Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	305,697,000	237,229,000
All Other Loans [Member] | Consumer and Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 13,204,000	$ 11,854,000

Loans and Allowance for Loan _4

Loans and Allowance for Loan Losses Performing and Impaired Loans) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 1,777,239	$ 1,323,258
All Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,743,081	1,290,464
All Other Loans [Member] | Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,739,522	1,287,823
All Other Loans [Member] | Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	3,559	2,641
Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	34,158	32,794
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	860,027	642,988
Commercial Real Estate [Member] | All Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	842,345	625,085
Commercial Real Estate [Member] | All Other Loans [Member] | Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	841,709	624,638
Commercial Real Estate [Member] | All Other Loans [Member] | Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	636	447
Commercial Real Estate [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	17,682	17,903
Consumer Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	407,254	293,457
Consumer Real Estate [Member] | All Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	398,542	286,007
Consumer Real Estate [Member] | All Other Loans [Member] | Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	397,306	284,585
Consumer Real Estate [Member] | All Other Loans [Member] | Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,236	1,422
Consumer Real Estate [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	8,712	7,450
Construction and Land Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	187,895	135,409
Construction and Land Development [Member] | All Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	183,293	130,289
Construction and Land Development [Member] | All Other Loans [Member] | Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	182,746	129,742
Construction and Land Development [Member] | All Other Loans [Member] | Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	547	547
Construction and Land Development [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	4,602	5,120
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	308,254	238,087
Commercial and Industrial [Member] | All Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	305,697	237,229
Commercial and Industrial [Member] | All Other Loans [Member] | Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	304,673	237,016
Commercial and Industrial [Member] | All Other Loans [Member] | Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,024	213
Commercial and Industrial [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	2,557	858
Consumer and Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	13,809	13,317
Consumer and Other [Member] | All Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	13,204	11,854
Consumer and Other [Member] | All Other Loans [Member] | Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	13,088	11,842
Consumer and Other [Member] | All Other Loans [Member] | Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	116	12
Consumer and Other [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 605	$ 1,463

Loans and Allowance for Loan _5

Loans and Allowance for Loan Losses (Textual) (Details)	12 Months Ended
	Dec. 31, 2018USD ($)segmentcontract	Dec. 31, 2017USD ($)contract
Financing Receivable, Modifications [Line Items]
Number of loan portfolio segments | segment	5
Nonaccrual restructured loans	$ 2,696,000	$ 1,764,000
Number of Contracts | contract		0
Number of loans modified as troubled debt restructurings with subsequent default | contract	0
Pre-approved unused lines of credit with related parties	$ 4,500,000
Trouble Debt Restructuring [Member]
Financing Receivable, Modifications [Line Items]
Troubled debt restructuring	116,000	$ 41,000
Nonaccrual restructured loans	0
Purchased Credit Impaired Loans [Member]
Financing Receivable, Modifications [Line Items]
Allowance for loan losses	$ 0	$ 16,000

Loans and Allowance for Loan _6

Loans and Allowance for Loan Losses (ALL by Loan Classification) (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 8,275,055	$ 5,860,291	$ 5,105,000
All Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	8,275,000	5,844,000
All Other Loans [Member] | Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	7,741,000	5,399,000
All Other Loans [Member] | Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	534,000	445,000
Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	0	16,000
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	3,639,000	2,465,000	2,369,000
Commercial Real Estate [Member] | All Other Loans [Member] | Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	3,639,000	2,444,000
Commercial Real Estate [Member] | All Other Loans [Member] | Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	0	5,000
Commercial Real Estate [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	0	16,000
Consumer Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	1,789,000	1,596,000	1,382,000
Consumer Real Estate [Member] | All Other Loans [Member] | Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	1,763,000	1,340,000
Consumer Real Estate [Member] | All Other Loans [Member] | Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	26,000	256,000
Consumer Real Estate [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	0	0
Construction and Land Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	795,000	521,000	717,000
Construction and Land Development [Member] | All Other Loans [Member] | Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	795,000	521,000
Construction and Land Development [Member] | All Other Loans [Member] | Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	0	0
Construction and Land Development [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	0	0
Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	1,746,000	1,062,000	520,000
Commercial and Industrial [Member] | All Other Loans [Member] | Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	1,304,000	890,000
Commercial and Industrial [Member] | All Other Loans [Member] | Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	442,000	172,000
Commercial and Industrial [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	0	0
Consumer and Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	306,000	216,000	$ 117,000
Consumer and Other [Member] | All Other Loans [Member] | Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	240,000	204,000
Consumer and Other [Member] | All Other Loans [Member] | Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	66,000	12,000
Consumer and Other [Member] | Purchased Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 0	$ 0

Loans and Allowance for Loan _7

Loans and Allowance for Loan Losses (ALL Roll Forward) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 5,860,291	$ 5,105,000
Loans charged off	(860,000)	(276,000)
Recoveries of loans charged off	339,000	248,000
Provision (reallocation) charged to operating expense	2,936,472	782,687
Ending balance	8,275,055	5,860,291
Commercial Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	2,465,000	2,369,000
Loans charged off	(38,000)	0
Recoveries of loans charged off	2,000	8,000
Provision (reallocation) charged to operating expense	1,210,000	88,000
Ending balance	3,639,000	2,465,000
Consumer Real Estate [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,596,000	1,382,000
Loans charged off	(275,000)	(111,000)
Recoveries of loans charged off	100,000	99,000
Provision (reallocation) charged to operating expense	368,000	226,000
Ending balance	1,789,000	1,596,000
Construction and Land Development [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	521,000	717,000
Loans charged off	0	0
Recoveries of loans charged off	9,000	13,000
Provision (reallocation) charged to operating expense	265,000	(209,000)
Ending balance	795,000	521,000
Commercial and Industrial [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,062,000	520,000
Loans charged off	(177,000)	(24,000)
Recoveries of loans charged off	72,000	67,000
Provision (reallocation) charged to operating expense	789,000	499,000
Ending balance	1,746,000	1,062,000
Consumer and Other [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	216,000	117,000
Loans charged off	(370,000)	(141,000)
Recoveries of loans charged off	156,000	61,000
Provision (reallocation) charged to operating expense	304,000	179,000
Ending balance	$ 306,000	$ 216,000

Loans and Allowance for Loan _8

Loans and Allowance for Loan Losses (Loan Risk Rating) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 1,777,239	$ 1,323,258
All Other Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,743,081	1,290,464
All Other Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,728,896	1,270,417
All Other Loans [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	10,758	13,668
All Other Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	309	3,852
All Other Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,915	2,241
All Other Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	203	286
Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	34,158	32,794
Purchased Credit Impaired Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	26,623	23,558
Purchased Credit Impaired Loans [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,147	2,637
Purchased Credit Impaired Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,536	538
Purchased Credit Impaired Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,852	5,308
Purchased Credit Impaired Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	753
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	860,027	642,988
Commercial Real Estate [Member] | All Other Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	842,345	625,085
Commercial Real Estate [Member] | All Other Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	834,912	616,028
Commercial Real Estate [Member] | All Other Loans [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	6,791	7,673
Commercial Real Estate [Member] | All Other Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	1,006
Commercial Real Estate [Member] | All Other Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	642	378
Commercial Real Estate [Member] | All Other Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Commercial Real Estate [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	17,682	17,903
Commercial Real Estate [Member] | Purchased Credit Impaired Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	14,050	14,386
Commercial Real Estate [Member] | Purchased Credit Impaired Loans [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,805	261
Commercial Real Estate [Member] | Purchased Credit Impaired Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,030	0
Commercial Real Estate [Member] | Purchased Credit Impaired Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	797	3,084
Commercial Real Estate [Member] | Purchased Credit Impaired Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	172
Consumer Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	407,254	293,457
Consumer Real Estate [Member] | All Other Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	398,542	286,007
Consumer Real Estate [Member] | All Other Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	394,728	279,464
Consumer Real Estate [Member] | All Other Loans [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,678	2,543
Consumer Real Estate [Member] | All Other Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	14	2,627
Consumer Real Estate [Member] | All Other Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,122	1,159
Consumer Real Estate [Member] | All Other Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	214
Consumer Real Estate [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	8,712	7,450
Consumer Real Estate [Member] | Purchased Credit Impaired Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	5,617	4,151
Consumer Real Estate [Member] | Purchased Credit Impaired Loans [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	756	1,345
Consumer Real Estate [Member] | Purchased Credit Impaired Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	446	456
Consumer Real Estate [Member] | Purchased Credit Impaired Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,893	1,192
Consumer Real Estate [Member] | Purchased Credit Impaired Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	306
Construction and Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	187,895	135,409
Construction and Land Development [Member] | All Other Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	183,293	130,289
Construction and Land Development [Member] | All Other Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	182,524	129,359
Construction and Land Development [Member] | All Other Loans [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	64	383
Construction and Land Development [Member] | All Other Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	158	0
Construction and Land Development [Member] | All Other Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	547	547
Construction and Land Development [Member] | All Other Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Construction and Land Development [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,602	5,120
Construction and Land Development [Member] | Purchased Credit Impaired Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,033	4,134
Construction and Land Development [Member] | Purchased Credit Impaired Loans [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	569	649
Construction and Land Development [Member] | Purchased Credit Impaired Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Construction and Land Development [Member] | Purchased Credit Impaired Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	337
Construction and Land Development [Member] | Purchased Credit Impaired Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	308,254	238,087
Commercial and Industrial [Member] | All Other Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	305,697	237,229
Commercial and Industrial [Member] | All Other Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	303,805	233,942
Commercial and Industrial [Member] | All Other Loans [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,090	3,007
Commercial and Industrial [Member] | All Other Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	137	64
Commercial and Industrial [Member] | All Other Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	462	157
Commercial and Industrial [Member] | All Other Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	203	59
Commercial and Industrial [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,557	858
Commercial and Industrial [Member] | Purchased Credit Impaired Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,382	68
Commercial and Industrial [Member] | Purchased Credit Impaired Loans [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	120
Commercial and Industrial [Member] | Purchased Credit Impaired Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	50	58
Commercial and Industrial [Member] | Purchased Credit Impaired Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	125	588
Commercial and Industrial [Member] | Purchased Credit Impaired Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	24
Consumer and Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	13,809	13,317
Consumer and Other [Member] | All Other Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	13,204	11,854
Consumer and Other [Member] | All Other Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	12,927	11,624
Consumer and Other [Member] | All Other Loans [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	135	62
Consumer and Other [Member] | All Other Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	155
Consumer and Other [Member] | All Other Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	142	0
Consumer and Other [Member] | All Other Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	13
Consumer and Other [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	605	1,463
Consumer and Other [Member] | Purchased Credit Impaired Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	541	819
Consumer and Other [Member] | Purchased Credit Impaired Loans [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	17	262
Consumer and Other [Member] | Purchased Credit Impaired Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	10	24
Consumer and Other [Member] | Purchased Credit Impaired Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	37	107
Consumer and Other [Member] | Purchased Credit Impaired Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 0	$ 251

Loans and Allowance for Loan _9

Loans and Allowance for Loan Losses (Past Due Loans) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	$ 2,696	$ 1,764
Total Past Due	5,921	5,269
Current Loans	1,737,160	1,285,195
Total loans	1,777,239	1,323,258
Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	34,158	32,794
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	272	128
Total Past Due	668	1,373
Current Loans	841,677	623,712
Total loans	860,027	642,988
Commercial Real Estate [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	17,682	17,903
Consumer Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	844	991
Total Past Due	2,928	1,987
Current Loans	395,614	284,020
Total loans	407,254	293,457
Consumer Real Estate [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	8,712	7,450
Construction and Land Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	547	547
Total Past Due	890	938
Current Loans	182,403	129,351
Total loans	187,895	135,409
Construction and Land Development [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	4,602	5,120
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	909	85
Total Past Due	1,165	502
Current Loans	304,532	236,727
Total loans	308,254	238,087
Commercial and Industrial [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	2,557	858
Consumer and Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual	124	13
Total Past Due	270	469
Current Loans	12,934	11,385
Total loans	13,809	13,317
Consumer and Other [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total loans	605	1,463
30 to 59 Days Past Due and Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, past due	2,160	1,546
30 to 59 Days Past Due and Accruing [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, past due	377	517
30 to 59 Days Past Due and Accruing [Member] | Consumer Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, past due	1,168	769
30 to 59 Days Past Due and Accruing [Member] | Construction and Land Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, past due	343	65
30 to 59 Days Past Due and Accruing [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, past due	155	86
30 to 59 Days Past Due and Accruing [Member] | Consumer and Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, past due	117	109
60 to 89 Days Past Due and Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, past due	481	450
60 to 89 Days Past Due and Accruing [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, past due	19	0
60 to 89 Days Past Due and Accruing [Member] | Consumer Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, past due	462	194
60 to 89 Days Past Due and Accruing [Member] | Construction and Land Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, past due	0	0
60 to 89 Days Past Due and Accruing [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, past due	0	200
60 to 89 Days Past Due and Accruing [Member] | Consumer and Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, past due	0	56
Past Due 90 Days or More and Accruing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, past due	584	1,509
Past Due 90 Days or More and Accruing [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, past due	0	728
Past Due 90 Days or More and Accruing [Member] | Consumer Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, past due	454	33
Past Due 90 Days or More and Accruing [Member] | Construction and Land Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, past due	0	326
Past Due 90 Days or More and Accruing [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, past due	101	131
Past Due 90 Days or More and Accruing [Member] | Consumer and Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Recorded investment, past due	$ 29	$ 291

Loans and Allowance for Loan_10

Loans and Allowance for Loan Losses (Impaired Loan Portfolio) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Impaired [Line Items]
Impaired loans with a valuation allowance, Related Allowance	$ 534	$ 461
Total impaired loans, Recorded Investment	3,559	2,657
Total impaired loans, Unpaid Principal Balance	3,652	2,826
Total impaired loans, Average Recorded Investment	3,358	2,005
Total impaired loans, Interest Income Recognized	111	129
All Other Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans without a valuation allowance, Recorded Investment	2,354	1,427
Impaired loans without a valuation allowance, Unpaid Principal Balance	2,387	1,462
Impaired loans without a valuation allowance, Average Recorded Investment	2,420	1,277
Impaired loans without a valuation allowance, Interest Income Recognized	71	63
Impaired loans with a valuation allowance, Recorded Investment	1,205	1,214
Impaired loans with a valuation allowance, Unpaid Principal Balance	1,265	1,241
Impaired loans with a valuation allowance, Related Allowance	534	445
Impaired loans with a valuation allowance, Average Recorded Investment	927	725
Impaired loans with a valuation allowance, Interest Income Recognized	40	50
All Other Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans without a valuation allowance, Recorded Investment	636	424
Impaired loans without a valuation allowance, Unpaid Principal Balance	648	454
Impaired loans without a valuation allowance, Average Recorded Investment	855	204
Impaired loans without a valuation allowance, Interest Income Recognized	33	44
Impaired loans with a valuation allowance, Recorded Investment	0	23
Impaired loans with a valuation allowance, Unpaid Principal Balance	0	23
Impaired loans with a valuation allowance, Related Allowance	0	5
Impaired loans with a valuation allowance, Average Recorded Investment	0	5
Impaired loans with a valuation allowance, Interest Income Recognized	0	1
All Other Loans [Member] | Consumer Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans without a valuation allowance, Recorded Investment	1,073	415
Impaired loans without a valuation allowance, Unpaid Principal Balance	1,089	420
Impaired loans without a valuation allowance, Average Recorded Investment	934	401
Impaired loans without a valuation allowance, Interest Income Recognized	29	16
Impaired loans with a valuation allowance, Recorded Investment	163	1,007
Impaired loans with a valuation allowance, Unpaid Principal Balance	205	1,033
Impaired loans with a valuation allowance, Related Allowance	26	256
Impaired loans with a valuation allowance, Average Recorded Investment	365	601
Impaired loans with a valuation allowance, Interest Income Recognized	0	38
All Other Loans [Member] | Construction and Land Development [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans without a valuation allowance, Recorded Investment	547	547
Impaired loans without a valuation allowance, Unpaid Principal Balance	547	547
Impaired loans without a valuation allowance, Average Recorded Investment	547	628
Impaired loans without a valuation allowance, Interest Income Recognized	0	0
Impaired loans with a valuation allowance, Recorded Investment	0	0
Impaired loans with a valuation allowance, Unpaid Principal Balance	0	0
Impaired loans with a valuation allowance, Related Allowance	0	0
Impaired loans with a valuation allowance, Average Recorded Investment	0	0
Impaired loans with a valuation allowance, Interest Income Recognized	0	0
All Other Loans [Member] | Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans without a valuation allowance, Recorded Investment	69	41
Impaired loans without a valuation allowance, Unpaid Principal Balance	70	41
Impaired loans without a valuation allowance, Average Recorded Investment	69	44
Impaired loans without a valuation allowance, Interest Income Recognized	6	3
Impaired loans with a valuation allowance, Recorded Investment	955	172
Impaired loans with a valuation allowance, Unpaid Principal Balance	973	172
Impaired loans with a valuation allowance, Related Allowance	442	172
Impaired loans with a valuation allowance, Average Recorded Investment	476	117
Impaired loans with a valuation allowance, Interest Income Recognized	37	10
All Other Loans [Member] | Consumer and Other [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans without a valuation allowance, Recorded Investment	29	0
Impaired loans without a valuation allowance, Unpaid Principal Balance	33	0
Impaired loans without a valuation allowance, Average Recorded Investment	15	0
Impaired loans without a valuation allowance, Interest Income Recognized	3	0
Impaired loans with a valuation allowance, Recorded Investment	87	12
Impaired loans with a valuation allowance, Unpaid Principal Balance	87	13
Impaired loans with a valuation allowance, Related Allowance	66	12
Impaired loans with a valuation allowance, Average Recorded Investment	86	2
Impaired loans with a valuation allowance, Interest Income Recognized	3	1
Purchased Credit Impaired Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans with a valuation allowance, Recorded Investment	0	16
Impaired loans with a valuation allowance, Unpaid Principal Balance	0	123
Impaired loans with a valuation allowance, Related Allowance	0	16
Impaired loans with a valuation allowance, Average Recorded Investment	11	3
Impaired loans with a valuation allowance, Interest Income Recognized	$ 0	$ 16

Loans and Allowance for Loan_11

Loans and Allowance for Loan Losses (Troubled Debt Restructurings) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)contract	Dec. 31, 2017contract
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract		0
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	1
Pre-Modification Outstanding Recorded Investment	$ 62
Post-Modification Outstanding Recorded Investment	$ 62
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	1
Pre-Modification Outstanding Recorded Investment	$ 18
Post-Modification Outstanding Recorded Investment	$ 18

Loans and Allowance for Loan_12

Loans and Allowance for Loan Losses (Purchased Credit Impaired Loans) (Details) - Purchased Credit Impaired Loans [Member] - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Certain Loans Acquired In Transfer Not Accounted	$ 48,404	$ 43,577
Less remaining purchase discount	(14,246)	(10,783)
Total, gross	34,158	32,794
Less: Allowance for loan losses	0	(16)
Carrying amount, net of allowance	34,158	32,778
Commercial Real Estate [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Certain Loans Acquired In Transfer Not Accounted	24,849	23,366
Consumer Real Estate [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Certain Loans Acquired In Transfer Not Accounted	11,108	10,764
Construction and Land Development [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Certain Loans Acquired In Transfer Not Accounted	5,731	6,285
Commercial and Industrial [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Certain Loans Acquired In Transfer Not Accounted	5,824	1,452
Consumer and Other [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Certain Loans Acquired In Transfer Not Accounted	$ 892	$ 1,710

Loans and Allowance for Loan_13

Loans and Allowance for Loan Losses (Accretable Yield Roll Forward) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Accretable yield, beginning of period	$ 9,287	$ 8,950
Additions	2,416	2,581
Accretion income	(5,368)	(4,217)
Reclassification from nonaccretable	1,494	926
Other changes, net	(777)	1,047
Accretable yield, end of period	$ 7,052	$ 9,287

Loans and Allowance for Loan_14

Loans and Allowance for Loan Losses (Acquired Purchased Credit Impaired Loans) (Details) - Purchased Credit Impaired Loans [Member] $ in Thousands	Dec. 31, 2018USD ($)
Tennessee Bancshares [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Contractual principal and interest at acquisition	$ 15,133
Nonaccretable difference	5,302
Expected cash flows at acquisition	9,831
Accretable yield	1,292
Basis in PCI loans at acquisition-estimated fair value	8,539
Foothills Bancorp [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Contractual principal and interest at acquisition	12,125
Nonaccretable difference	2,748
Expected cash flows at acquisition	9,377
Accretable yield	1,124
Basis in PCI loans at acquisition-estimated fair value	$ 8,253

Loans and Allowance for Loan_15

Loans and Allowance for Loan Losses (Related Party Loans) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Loans and Leases Receivable, Related Parties [Roll Forward]
Balance, beginning of year	$ 18,330	$ 12,999
Disbursements	34,639	14,533
Repayments	(21,723)	(9,202)
Balance, end of year	$ 31,246	$ 18,330

Premises and Equipment (Summary

Premises and Equipment (Summary of Premises and Equipment) (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Land and land improvements	$ 14,712,000	$ 10,854,000
Building and leasehold improvements	36,640,000	28,576,000
Furniture, fixtures and equipment	12,318,000	10,073,000
Construction in progress	2,875,000	1,495,000
Total, gross	66,545,000	50,998,000
Accumulated depreciation	(10,533,000)	(7,998,000)
Total, net	$ 56,012,184	$ 43,000,249

Premises and Equipment (Textual

Premises and Equipment (Textual) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)lease	Dec. 31, 2017USD ($)
Property, Plant and Equipment [Abstract]
Estimated costs to complete construction in progress	$ 542
Number of ground leases | lease	2
Lease expense	$ 795	$ 722
Depreciation expense	$ 2,600	$ 1,800

Premises and Equipment (Minimum

Premises and Equipment (Minimum Lease Payments) (Details) $ in Thousands	Dec. 31, 2018USD ($)
Property, Plant and Equipment [Abstract]
2019	$ 644
2020	622
2021	462
2022	259
2023	121
Thereafter	864
Total	$ 2,972

Deposits (Textual) (Details)

Deposits (Textual) (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Time Deposits Maturity [Line Items]
Time deposits of 250,000 or more	$ 165,100,000	$ 171,300,000
Fair value adjustments to time deposits	759,100	1,100,000
Deposit liabilities reclassified as loans receivable	747,000	155,000
Related Party [Member]
Time Deposits Maturity [Line Items]
Related party deposit liabilities	$ 24,300,000	$ 16,700,000

Deposits (Scheduled Maturities)

Deposits (Scheduled Maturities) (Details) $ in Thousands	Dec. 31, 2018USD ($)
Deposits [Abstract]
2019	$ 449,948
2020	120,376
2021	28,094
2022	20,446
2023	29,053
Thereafter	0
Total	$ 647,917

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets (Textual) (Details) $ in Millions	Dec. 31, 2018USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 66.1

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets (Schedule of Finite Lived Intangible Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Amortized intangible asset:
Gross Carrying Amount	$ 14,549	$ 8,589
Accumulated Amortization	$ 1,602	$ 626

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets (Aggregate Amortization Expense) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Aggregate amortization expense of core deposit premium intangible	$ 976,195	$ 346,435

Goodwill and Intangible Asset_5

Goodwill and Intangible Assets (Future Amortization Expense) (Details) $ in Thousands	Dec. 31, 2018USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2019	$ 1,368
2020	1,351
2021	1,334
2022	1,317
2023	1,301
Thereafter	6,276
Total	$ 12,947

Federal Home Loan Bank Advanc_3

Federal Home Loan Bank Advances and Other Borrowings (Textual) (Details)	May 01, 2018USD ($)	Sep. 30, 2018	Dec. 31, 2018USD ($)	Jan. 15, 2019USD ($)	Dec. 31, 2017USD ($)	Oct. 31, 2017USD ($)
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Long-term line of credit			$ 0		$ 10,000,000
Interest rate at period end (as a percent)					4.25%
Carrying value of securities pledged to Federal Home Loan Bank			0		$ 16,300,000
Long-term federal home loan bank advances			0		$ 0
Federal funds purchased			10,800,000
Other borrowings			480,300
Fiscal quarter 2019 [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Amortization			262,500
Fiscal quarter 2020 [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Amortization			287,500
Fiscal Quarter 2021 [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Amortization			312,500
Fiscal Quarter 2022 [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Amortization			337,500
Federal Home Loan Bank Advances [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Line of credit facility, maximum borrowing capacity			$ 59,400,000
Revolving Credit Facility [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Line of credit facility, maximum borrowing capacity						$ 15,000,000
Covenant compliance, ratio of non-performing assets as a percentage total assets, not to be greater than			3.25%
Covenant compliance, Texas ratio, not to be greater than (as a percent)			35.00%
Covenant compliance, liquidity ratio, not to be less than (as a percent)			9.00%
Covenant compliance, liquidity ratio in consecutive quarters, not to be less than (as a percent)			10.00%
Covenant terms, return on average assets, next nine months (as a percent)		0.45%
Covenant terms, return on average assets, thereafter (as a percent)			0.50%
Covenant terms, debt service coverage ratio			0.0125
Covenant compliance, interest coverage ratio, not to be less than			2.50
Revolving Credit Facility [Member] | Prime Rate [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Basis spread on variable rate (as a percent)			(0.25%)
Variable rate, floor (as a percent)			3.50%
Initial line of credit period			90 days
Subsidiaries [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Total risk-based capital ratio required to well-capitalized			10.50%
Tier 1 risk-based capital ratio required to be well capitalized			9.50%
Tier 1 leverage ratio required to be well capitalized			8.00%
Loans Payable [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Principal amount	$ 500,000
Interest rate	4.75%
Loan term	10 years
Subsequent Event [Member] | Revolving Credit Facility [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Long-term line of credit				$ 0

Federal Home Loan Bank Advanc_4

Federal Home Loan Bank Advances and Other Borrowings (Scheduled Maturities) (Details) $ in Thousands	Dec. 31, 2018USD ($)
Debt Disclosure [Abstract]
2019	$ 10,803
2020	43
2021	45
2022	47
2023	50
Thereafter	254
Total	$ 11,242

Income Taxes (Components of Inc

Income Taxes (Components of Income Tax) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Current tax expense
Federal	$ 661,000	$ 1,962,000
State	141,000	428,000
Deferred tax expense (benefit) related to:
Federal	1,992,000	1,441,000
State	439,000	158,000
Change in tax rate	0	2,440,000
Total income tax expense	$ 3,233,403	$ 6,428,791

Income Taxes (Effective Income

Income Taxes (Effective Income Tax Rate Reconciliation) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Federal income tax expense computed at the statutory rate	$ 4,481,000	$ 3,891,000
State income taxes, net of federal tax benefit	551,000	491,000
Nondeductible acquisition expenses	138,000	364,000
Tax benefit from stock options	(1,786,000)	0
Change in tax rate	0	2,440,000
Other	(151,000)	(757,000)
Total income tax expense	$ 3,233,403	$ 6,428,791

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)
Foothills Bancorp [Member] | Domestic Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforward	$ 1.7
Income Taxes [Member]
Operating Loss Carryforwards [Line Items]
Decrease in tax provision	$ 1.6

Income Taxes (Deferred Tax Asse

Income Taxes (Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets:
Allowance for loan losses	$ 2,172	$ 1,561
Fair value adjustments	6,086	4,829
Unrealized losses on investment securities	659	424
Unrealized losses on hedges	280	0
Foreclosed real estate	271	301
Deferred compensation	833	849
Federal net operating loss carryforward	350	0
Other	440	849
Total deferred tax assets	11,091	8,813
Deferred tax liabilities:
Accumulated depreciation	1,875	1,194
Core deposit intangible	3,332	1,945
Other	286	223
Total deferred tax liabilities	5,493	3,362
Net deferred tax asset	$ 5,598	$ 5,451

Subordinated debt (Details)

Subordinated debt (Details) - USD ($)	Sep. 28, 2018	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Net proceeds from subordinated debt		$ 39,158,444	$ 0
Subordinated Debt [Member]
Debt Instrument [Line Items]
Principal amount	$ 40,000,000
Net proceeds from subordinated debt		12,000,000
Interest rate	5.625%
Debt issuance costs	$ 842,000	823,000
Amortization expense of debt issuance costs		$ 19,000
Subordinated Debt [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Basis spread on variable rate (as a percent)		2.55%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Repayment of line of credit	$ 15,000,000

Employee Benefit Plans (Textual

Employee Benefit Plans (Textual) (Details)	Jan. 25, 2018$ / sharesshares	Aug. 04, 2017$ / sharesshares	Dec. 31, 2018USD ($)planshares	Dec. 31, 2017USD ($)shares
Defined Benefit Plan Disclosure [Line Items]
Deferred compensation arrangements, overall, description			After one year of service the Company matches 100 percent of employee contributions up to 3 percent of compensation and 50 percent of employee contributions on the next 2 percent of compensation.
Number of stock option plans | plan			1
Number of inactive stock option plans with outstanding grants | plan			4
Share-based compensation expense			$ 133,884	$ 97,966
Options vested in period, fair value			243,831	313,977
Deferred tax expense from stock options exercised			318,826	1,331,689
Options, exercises in period, intrinsic value			1,523,014	$ 5,468,780
Options, outstanding, intrinsic value			1,307,043
Options, exercisable, intrinsic value			1,263,872
Proceeds from stock options exercised			$ 1,519,244
Number of shares granted (in shares) | shares			0	0
Director [Member]
Defined Benefit Plan Disclosure [Line Items]
Direct stock grant expense			$ 9,062	$ 31,791
Deferred Salary Reduction Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, cost recognized			715,698	427,975
Stock Appreciation Rights (SARs) [Member]
Defined Benefit Plan Disclosure [Line Items]
Share-based compensation expense			33,916	21,829
Stock Options [Member]
Defined Benefit Plan Disclosure [Line Items]
Unrecognized compensation costs			$ 124,450
Unrecognized compensation costs, period for recognition			1 year
Restricted Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Number of shares granted (in shares) | shares			7,553
Vested (in shares) | shares			5,553
Legacy Cornerstone Bancshares, Inc. Long-Term Incentive Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Exercise price, not less than (as a percent)			100.00%
2015 Stock Incentive Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Exercise price, not less than (as a percent)			110.00%
Number outstanding (in shares) | shares			2,000,000
Term of options, no more than			10 years
Voting power held by participant (as a percent)			10.00%
Term of option to participants with more than ten percent voting power			5 years
Percentage of incentive stock options vesting on second anniversary			30.00%
Percentage of incentive stock options vesting on third anniversary			30.00%
Percentage of incentive stock options vesting on fourth anniversary			40.00%
Percentage of nonqualified stock options vesting on first anniversary			50.00%
Percentage of nonqualified stock options vesting on second anniversary			50.00%
2015 Stock Incentive Plan [Member] | Nonstatutory Stock Option [Member]
Defined Benefit Plan Disclosure [Line Items]
Exercise price, not less than (as a percent)			100.00%
2015 Stock Incentive Plan [Member] | Restricted Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Share-based compensation expense			$ 263,013	$ 56,330
Number of shares granted (in shares) | shares	7,553	27,500
Grant date fair value (in dollars per share) | $ / shares	$ 21.61	$ 24.58
Unrecognized compensation cost			$ 519,727
Legacy Capstone Stock Option Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Exercise price, not less than (as a percent)			100.00%
401 (k) Matching Range One [Member] | Deferred Salary Reduction Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Request service period			1 year
Employer matching contribution, percent of match			100.00%
Employer matching contribution, percent of employees gross pay			3.00%
401 (k) Matching Range Two [Member] | Deferred Salary Reduction Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer matching contribution, percent of match			50.00%
Employer matching contribution, percent of employees gross pay			2.00%
Share-based Compensation Award, Tranche Three [Member] | 2015 Stock Incentive Plan [Member] | Restricted Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Term of option to participants with more than ten percent voting power			5 years
Vested (in shares) | shares	2,000
Share-based Compensation Award, Tranche Two [Member] | 2015 Stock Incentive Plan [Member] | Restricted Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Term of option to participants with more than ten percent voting power			6 months
Share-based Compensation Award, Tranche Two [Member] | 2015 Stock Incentive Plan [Member] | Restricted Stock [Member] | Director [Member]
Defined Benefit Plan Disclosure [Line Items]
Vested (in shares) | shares	926
Share-based Compensation Award, Tranche One [Member] | 2015 Stock Incentive Plan [Member] | Restricted Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Vested (in shares) | shares	4,627

Employee Benefit Plans (Summary

Employee Benefit Plans (Summary of Stock Option Activity) (Details) - Officer and Employee Plans [Member] - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Number
Outstanding (in shares)	316,574	717,524
Granted (in shares)	0	0
Exercised (in shares)	(132,783)	(506,923)
Forfeited (in shares)	(13,166)	(24,496)
Capstone options assumed in business combination (in shares)		130,469
Outstanding (in shares)	170,625	316,574
Weighted Average Exercisable Price
Weighted Average Exercisable Price, Outstanding (in dollars per share)	$ 11.82	$ 10.57
Weighted Average Exercisable Price Granted (in dollars per share)	0	0
Weighted Average Exercisable Price Exercised (in dollars per share)	11.39	9.64
Weighted Average Exercisable Price Forfeited (in dollars per share)	31.96	19.90
Weighted Average Exercisable Price, Capstone options assumed in business combination (in dollars per share)		11.76
Weighted Average Exercise Price, Outstanding (in dollars per share)	$ 10.61	$ 11.82

Employee Benefit Plans (Options

Employee Benefit Plans (Options Outstanding by Exercise Price Range) (Details) - Officer and Employee Plans [Member] - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices (in dollars per share)	$ 10.61	$ 11.82	$ 10.57
Number Outstanding (in shares)	170,625	316,574	717,524
Options Outstanding, Weighted Average Remaining Life	4 years 2 months 5 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 10.61
Options, Number Exercisable (in shares)	157,218
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 10.23
6.60 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices (in dollars per share)	$ 6.60
Number Outstanding (in shares)	30,000
Options Outstanding, Weighted Average Remaining Life	3 years 2 months 12 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 6.60
Options, Number Exercisable (in shares)	30,000
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 6.60
6.80 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices (in dollars per share)	$ 6.80
Number Outstanding (in shares)	14,250
Options Outstanding, Weighted Average Remaining Life	2 years 2 months 1 day
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 6.80
Options, Number Exercisable (in shares)	14,250
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 6.80
9.48 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices (in dollars per share)	$ 9.48
Number Outstanding (in shares)	25,625
Options Outstanding, Weighted Average Remaining Life	4 years 2 months 12 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 9.48
Options, Number Exercisable (in shares)	25,625
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 9.48
9.60 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices (in dollars per share)	$ 9.60
Number Outstanding (in shares)	35,125
Options Outstanding, Weighted Average Remaining Life	5 years 2 months 12 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 9.60
Options, Number Exercisable (in shares)	35,125
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 9.60
11.76 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices (in dollars per share)	$ 11.76
Number Outstanding (in shares)	13,599
Options Outstanding, Weighted Average Remaining Life	2 years 4 months 24 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 11.76
Options, Number Exercisable (in shares)	13,599
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 11.76
14.40 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices (in dollars per share)	$ 14.40
Number Outstanding (in shares)	11,792
Options Outstanding, Weighted Average Remaining Life	2 months 12 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 14.40
Options, Number Exercisable (in shares)	11,792
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 14.40
15.05 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Prices (in dollars per share)	$ 15.05
Number Outstanding (in shares)	40,234
Options Outstanding, Weighted Average Remaining Life	6 years 9 months
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 15.05
Options, Number Exercisable (in shares)	26,827
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 15.05

Employee Benefit Plans (Schedul

Employee Benefit Plans (Schedule of Non-vested Options) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Number
Nonvested, beginning balance (in shares)	23,455
Granted (in shares)	0	0
Vested (in shares)	(13,346)
Forfeited/expired (in shares)	3,298
Nonvested, ending balance (in shares)	13,407	23,455
Weighted Average Grant-Date Fair Value
Weighted Average Grant-Date Fair Value, Nonvested, beginning balance (in dollars per share)	$ 12.31
Weighted Average Grant-Date Fair Value, Granted (in dollars per share)	0
Weighted Average Grant-Date Fair Value, Vested (in dollars per share)	15.05
Weighted Average Grant-Date Fair Value, Forfeited/expired (in dollars per share)	15.05
Weighted Average Grant-Date Fair Value, Nonvested, ending balance (in dollars per share)	$ 15.05	$ 12.31

Employee Benefit Plans (Sched_2

Employee Benefit Plans (Schedule of Non-vested Restricted Stock) (Details) - Restricted Stock [Member]	12 Months Ended
	Dec. 31, 2018shares
Number
Nonvested, beginnning of period (in shares)	27,500
Granted (in shares)	7,553
Vested (in shares)	(5,553)
Forfeited/expired (in shares)	0
Nonvested, end of period (in shares)	29,500

Securities Sold Under Agreeme_2

Securities Sold Under Agreements to Repurchase (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreements to repurchase	$ 11.8	$ 24.1
Minimum [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreement to repurchase, maturity of agreement	1 day
Maximum [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Securities sold under agreement to repurchase, maturity of agreement	4 days
Agency Securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Collateral	$ 11.8
Mortgage Backed Securities [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Collateral		$ 24.1

Commitments and Contingencies_2

Commitments and Contingencies (Details) $ in Millions	Dec. 31, 2018USD ($)
Commitments and Contingencies Disclosure [Abstract]
Commitments to extend credit	$ 333.9
Standby letters of credit	$ 12.2

Regulatory Matters (Textual) (D

Regulatory Matters (Textual) (Details)	12 Months Ended
	Dec. 31, 2018USD ($)
Banking and Thrift [Abstract]
Dividends	$ 0
Dividends payable	$ 33,400,000

Regulatory Matters (Regulatory

Regulatory Matters (Regulatory Capital Levels) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
SmartFinancial, Inc. [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk-Weighted Assets), Actual Amount		$ 163,683
Tier 1 Capital (to Risk-Weighted Assets), Actual Amount		157,823
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Actual Amount		157,823
Tier 1 Capital (to Average Assets), Actual Amount		$ 157,823
Total Capital (to Risk-Weighted Assets), Actual Ratio (as a percent)		10.98%
Tier 1 Capital (to Risk-Weighted Assets), Actual Ratio (as a percent)		10.59%
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Actual Ratio (as a percent)		10.59%
Tier 1 Capital (to Average Assets), Actual Ratio (as a percent)		10.78%
Total Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Amount		$ 119,257
Tier 1 Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Amount		89,442
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Amount		67,082
Tier 1 Capital (to Average Assets), Minimum for capital adequacy purposes Amount		$ 58,562
Total Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Ratio (as a percent)		8.00%
Tier 1 Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Ratio (as a percent)		6.00%
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Ratio (as a percent)		4.50%
Tier 1 Capital (to Average Assets), Minimum for capital adequacy purposes Ratio (as a percent)		4.00%
Smart Bank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total Capital (to Risk-Weighted Assets), Actual Amount	$ 243,774	$ 168,148
Tier 1 Capital (to Risk-Weighted Assets), Actual Amount	235,499	162,288
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Actual Amount	235,499	162,288
Tier 1 Capital (to Average Assets), Actual Amount	$ 235,499	$ 162,288
Total Capital (to Risk-Weighted Assets), Actual Ratio (as a percent)	12.74%	11.29%
Tier 1 Capital (to Risk-Weighted Assets), Actual Ratio (as a percent)	12.31%	10.90%
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Actual Ratio (as a percent)	12.31%	10.90%
Tier 1 Capital (to Average Assets), Actual Ratio (as a percent)	11.17%	11.26%
Total Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Amount	$ 153,017	$ 119,111
Tier 1 Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Amount	114,763	89,333
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Amount	86,072	67,000
Tier 1 Capital (to Average Assets), Minimum for capital adequacy purposes Amount	$ 84,300	$ 57,656
Total Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Ratio (as a percent)	8.00%	8.00%
Tier 1 Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Ratio (as a percent)	6.00%	6.00%
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Minimum for capital adequacy purposes Ratio (as a percent)	4.50%	4.50%
Tier 1 Capital (to Average Assets), Minimum for capital adequacy purposes Ratio (as a percent)	4.00%	4.00%
Total Capital (to Risk-Weighted Assets), Minimum to be well capitalized under prompt corrective action provisions Amount	$ 191,271	$ 148,889
Tier 1 Capital (to Risk-Weighted Assets), Minimum to be well capitalized under prompt corrective action provisions Amount	153,017	119,111
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Minimum to be well capitalized under prompt corrective action provisions Amount	124,326	96,778
Tier 1 Capital (to Average Assets), Minimum to be well capitalized under prompt corrective action provisions Amount	$ 105,375	$ 72,070
Total Capital (to Risk-Weighted Assets), Minimum to be well capitalized under prompt corrective action provisions Ratio (as a percent)	10.00%	10.00%
Tier 1 Capital (to Risk-Weighted Assets), Minimum to be well capitalized under prompt corrective action provisions Ratio (as a percent)	8.00%	8.00%
Common Equity Tier 1 Capital (to Risk-Weighted Assets), Minimum to be well capitalized under prompt corrective action provisions Ratio (as a percent)	6.50%	6.50%
Tier 1 Capital (to Average Assets), Minimum to be well capitalized under prompt corrective action provisions Ratio (as a percent)	5.00%	5.00%

Concentrations of Credit Risk (

Concentrations of Credit Risk (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Concentration Risk [Line Items]
Credit extending terms to borrowers	The Bank, as a matter of policy, does not generally extend credit to any single borrower or group of related borrowers in excess of 25 percent of statutory capital, or approximately
Percentage of statutory capital	25.00%
Credit extending terms, maximum amount of statutory capital	$ 77.8
Commercial Real Estate [Member]
Concentration Risk [Line Items]
Concentration risk (as a percent)	55.00%	56.00%
Loan Portfolio Secured by Real Estate [Member]
Concentration Risk [Line Items]
Concentration risk (as a percent)	82.00%

Fair Value of Assets and Liab_3

Fair Value of Assets and Liabilities (Assets and Liabilities Measured on Recurring Basis) (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	$ 201,687,683	$ 151,944,567
Derivative financial instruments	1,174,000
Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	0	0
Derivative financial instruments	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	201,688,000	151,944,000
Derivative financial instruments	1,174,000
Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	0	0
U.S. Government-sponsored enterprises (GSEs) [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	43,503,000	25,776,000
U.S. Government-sponsored enterprises (GSEs) [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	0	0
U.S. Government-sponsored enterprises (GSEs) [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	43,503,000	25,776,000
U.S. Government-sponsored enterprises (GSEs) [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	0	0
Muncipal Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	55,161,000	9,003,000
Muncipal Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	0	0
Muncipal Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	55,161,000	9,003,000
Muncipal Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	0	0
Other Debt Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	910,000	950,000
Other Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	0	0
Other Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	910,000	950,000
Other Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	0	0
Mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	102,114,000	116,215,000
Mortgage-backed securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	0	0
Mortgage-backed securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	102,114,000	116,215,000
Mortgage-backed securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	$ 0	$ 0

Fair Value of Assets and Liab_4

Fair Value of Assets and Liabilities (Assets and Liabilities Measured on Nonreucrring Basis) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impaired loans		$ 769
Foreclosed assets	$ 2,495	3,254
Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impaired loans	0	0
Foreclosed assets	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impaired loans	0	0
Foreclosed assets	0	0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impaired loans	671	769
Foreclosed assets	$ 2,495	$ 3,254

Fair Value of Assets and Liab_5

Fair Value of Assets and Liabilities (Unobservable Inputs) (Details)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impaired loans		$ 769,000
Foreclosed assets	$ 2,495,458	3,254,392
Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impaired loans	$ 671,000	$ 769,000
Impaired loans, measurement input	0.443	0.355
Foreclosed assets	$ 2,495,000	$ 3,254,000
Foreclosed assets, measurement input	0.233	0.178

Fair Value of Assets and Liab_6

Fair Value of Assets and Liabilities (Carrying Amount and Estimated Fair Value of Financial Instruments) (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Assets:
Securities available-for-sale	$ 201,687,683	$ 151,944,567
Restricted investments	11,499,000	6,430,700
Liabilities:
Noninterest-bearing demand deposits	319,861,237	220,520,287
Interest-bearing demand deposits	311,482,434	231,643,508
Money Market and Savings deposits	641,944,880	543,644,830
Federal Home Loan Bank advances and other borrowings	11,242,533	43,600,000
Subordinated debt	39,176,947	0
Derivative financial instruments	1,174,000
Carrying Amount [Member]
Assets:
Cash and cash equivalents	115,822,000	113,027,000
Securities available-for-sale	201,688,000	151,944,000
Restricted investments	11,499,000	6,431,000
Loans, net	1,768,964,000	1,317,398,000
Liabilities:
Noninterest-bearing demand deposits	319,861,000	220,520,000
Interest-bearing demand deposits	311,482,000	231,644,000
Money Market and Savings deposits	641,945,000	543,645,000
Time deposits	648,675,000	442,774,000
Securities sold under agreements to repurchase	11,756,000	24,055,000
Federal Home Loan Bank advances and other borrowings	11,243,000	43,600,000
Subordinated debt	39,177,000
Derivative financial instruments	1,174,000
Estimated Fair Value [Member]
Assets:
Cash and cash equivalents	115,822,000	113,027,000
Securities available-for-sale	201,688,000	151,944,000
Loans, net	1,766,838,000	1,292,303,000
Liabilities:
Noninterest-bearing demand deposits	319,861,000	220,520,000
Interest-bearing demand deposits	311,482,000	231,644,000
Money Market and Savings deposits	641,945,000	543,645,000
Time deposits	649,169,000	443,547,000
Securities sold under agreements to repurchase	11,756,000	24,055,000
Federal Home Loan Bank advances and other borrowings	11,243,000	43,600,000
Subordinated debt	39,190,000
Derivative financial instruments	1,174,000
Fair Value, Inputs, Level 1 [Member]
Assets:
Cash and cash equivalents	115,822,000	113,027,000
Securities available-for-sale	0	0
Liabilities:
Derivative financial instruments	0
Fair Value, Inputs, Level 2 [Member]
Assets:
Securities available-for-sale	201,688,000	151,944,000
Liabilities:
Noninterest-bearing demand deposits	319,861,000	220,520,000
Interest-bearing demand deposits	311,482,000	231,644,000
Money Market and Savings deposits	641,945,000	543,645,000
Time deposits	649,169,000	443,547,000
Securities sold under agreements to repurchase	11,756,000	24,055,000
Federal Home Loan Bank advances and other borrowings	11,243,000	43,600,000
Derivative financial instruments	1,174,000
Fair Value, Inputs, Level 3 [Member]
Assets:
Securities available-for-sale	0	0
Loans, net	1,766,838,000	$ 1,292,303,000
Liabilities:
Subordinated debt	$ 39,190,000

Small Business Lending Fund (De

Small Business Lending Fund (Details) - USD ($)	Mar. 06, 2017	Jan. 30, 2017	Feb. 04, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)				0	0
Preferred stock, dividend rate (as a percent)			9.00%				1.00%
Preferred stock dividends				$ 0	$ 195,000	$ 1,000,000	$ 120,000
Common stock, par value (in dollars per share)				$ 1	$ 1
Proceeds from issuance of common stock				$ 1,528,306	$ 37,852,113
Payments for redemption of preferred stock	$ 12,000,000			0	12,000,000
Payment of dividends on preferred stock	$ 195,000			$ 0	$ 195,000
SBLF Program [Member]
Class of Stock [Line Items]
Preferred stock, shares issued (in shares)							12,000
Share price (in dollars per share)							$ 1,000
Common Stock [Member]
Class of Stock [Line Items]
Issuance of common stock in public offering (in shares)		2,010,084
Common stock, par value (in dollars per share)		$ 1
Proceeds from issuance of common stock		$ 33,200,000

Concentration in Deposits (Deta

Concentration in Deposits (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Concentration Risk [Line Items]
Deposits	$ 1,921,963,991	$ 1,438,582,719
Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Deposits	$ 160,600,000	$ 116,100,000

Earnings per Share (Details)

Earnings per Share (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Earnings Per Share [Abstract]
Anti-dilutive securities excluded from computation of earnings per share (in shares)	0	13,166
Basic earnings per share computation:
Net income available to common stockholders	$ 18,102,415	$ 4,820,064
Average common shares outstanding - basic (in shares)	12,423,618	8,639,212
Basic earnings per share (in dollars per share)	$ 1.46	$ 0.56
Diluted earnings per share computation:
Net income available to common stockholders	$ 18,102,000	$ 4,820,000
Average common shares outstanding - basic (in shares)	12,423,618	8,639,212
Incremental shares from assumed conversions:
Stock options (in shares)	94,022	154,315
Average common shares outstanding - diluted (in shares)	12,517,640	8,793,527
Diluted earnings per share (in dollars per share)	$ 1.45	$ 0.55

Condensed Parent Information (B

Condensed Parent Information (Balance Sheet) (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
ASSETS
Cash	$ 115,822,459	$ 113,026,884	$ 68,748,308
Other assets	14,513,890	13,232,247
Total assets	2,274,409,335	1,720,770,682
LIABILITIES AND STOCKHOLDERS’ EQUITY
Other borrowings	480,300
Total liabilities	1,991,397,854	1,514,918,842
Stockholders’ equity	283,011,481	205,851,840	105,240,140
Total liabilities and stockholders' equity	2,274,409,335	1,720,770,682
Parent [Member]
ASSETS
Cash	13,684,000	3,936,000	$ 2,068,000
Investment in subsidiaries	308,422,000	168,104,000
Other assets	99,000	42,766,000
Total assets	322,205,000	214,806,000
LIABILITIES AND STOCKHOLDERS’ EQUITY
Other liabilities	17,000	(1,046,000)
Other borrowings	39,177,000	10,000,000
Total liabilities	39,194,000	8,954,000
Stockholders’ equity	283,011,000	205,852,000
Total liabilities and stockholders' equity	$ 322,205,000	$ 214,806,000

Condensed Parent Information (I

Condensed Parent Information (Income Statement) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
INCOME
Interest income	$ 92,210,146	$ 52,022,396
EXPENSES
Interest expense	15,566,177	5,693,353
Income tax (benefit) expense	(3,233,403)	(6,428,791)
Net income	18,102,415	5,015,064
Preferred stock dividend requirements	0	195,000	$ 1,000,000	$ 120,000
Net income available to common stockholders	18,102,415	4,820,064
Parent [Member]
INCOME
Interest income	21,000	0
EXPENSES
Interest expense	1,005,000	69,000
Other operating expenses	2,822,000	2,657,000
(Loss) before equity in undistributed earnings of subsidiaries and income tax benefit	(3,806,000)	(2,726,000)
Equity in undistributed earnings of subsidiaries	22,741,000	7,134,000
Income tax (benefit) expense	833,000	(607,000)
Net income	18,102,000	5,015,000
Preferred stock dividend requirements	0	195,000
Net income available to common stockholders	$ 18,102,000	$ 4,820,000

Condensed Parent Information (C

Condensed Parent Information (Cash Flows) (Details) - USD ($)	Mar. 06, 2017	Dec. 31, 2018	Dec. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES
Net income		$ 18,102,415	$ 5,015,064
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Other		(2,110,950)	(2,682,548)
CASH FLOWS FROM FINANCING ACTIVITIES
Redemption of preferred stock	$ (12,000,000)	0	(12,000,000)
Net proceeds from subordinated debt		39,158,444	0
Proceeds from issuance of common stock		1,528,306	37,852,113
Payment of dividends on preferred stock	$ (195,000)	0	(195,000)
CASH FLOWS FROM INVESTING ACTIVITIES
NET INCREASE IN CASH AND CASH EQUIVALENTS		2,795,575	44,278,576
CASH AND CASH EQUIVALENTS, beginning of year		113,026,884	68,748,308
CASH AND CASH EQUIVALENTS, end of year		115,822,459	113,026,884
Parent [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net income		18,102,000	5,015,000
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Equity in undistributed income of subsidiary		(22,741,000)	(7,134,000)
Other		1,631,000	(2,449,000)
Net cash provided by operating activities		(3,008,000)	(4,568,000)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from issuance of note payable		0	10,000,000
Repayment of note payable		(10,000,000)	0
Redemption of preferred stock		0	(12,000,000)
Net proceeds from subordinated debt		39,158,000	0
Proceeds from issuance of common stock		1,528,000	37,853,000
Payment of dividends on preferred stock		0	(195,000)
Net cash provided by financing activities		30,686,000	35,658,000
CASH FLOWS FROM INVESTING ACTIVITIES
Net cash paid for business combinations		(5,930,000)	(14,222,000)
Equity contribution to subsidiary		(12,000,000)	(15,000,000)
Net cash used in investing activities		(17,930,000)	(29,222,000)
NET INCREASE IN CASH AND CASH EQUIVALENTS		9,748,000	1,868,000
CASH AND CASH EQUIVALENTS, beginning of year		3,936,000	2,068,000
CASH AND CASH EQUIVALENTS, end of year		$ 13,684,000	$ 3,936,000

Derivatives (Textual) (Details)

Derivatives (Textual) (Details) - Designated as Hedging Instrument [Member] - Interest Rate Swap [Member] $ in Millions	Dec. 04, 2018USD ($)instrument
Derivatives, Fair Value [Line Items]
Number of derivative instruments | instrument	15
Notional amount | $	$ 35

Derivatives (Summary of Fair Va

Derivatives (Summary of Fair Value Hedges) (Details) - Interest Rate Swap, Liability [Member] - Designated as Hedging Instrument [Member]	12 Months Ended
	Dec. 31, 2018USD ($)
Derivatives, Fair Value [Line Items]
Weighted average remaining maturity	9 years 2 months 23 days
Weighted Average Pay Rate	3.10%
Derivative liability, notional amount	$ 35,000,000
Hedged liability, fair value	$ (1,174,000)

Derivatives (Fair Value Hedges

Derivatives (Fair Value Hedges on Income Statement) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Interest Income	$ 92,210,146	$ 52,022,396
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Income	(1,174,000)
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Income	$ 1,174,000

Derivatives (Fair Value Hedge_2

Derivatives (Fair Value Hedges in Balance Sheet) (Details) $ in Thousands	Dec. 31, 2018USD ($)
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Carrying amount of hedged asset	$ 39,730
Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets	$ 1,174