Reliant Bancorp (RBNC) 10-Q 6 Nov 18 2018 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Nov. 05, 2018
Document Information [Abstract]
Entity Registrant Name	Reliant Bancorp, Inc.
Entity Central Index Key	1,606,440
Trading Symbol	rbnc
Current Fiscal Year End Date	--12-31
Entity Filer Category	Smaller Reporting Company
Entity Common Stock, Shares Outstanding (in shares)		11,531,594
Document Type	10-Q
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3
Amendment Flag	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
ASSETS
Cash and due from banks	$ 34,026	$ 20,497
Federal funds sold	417	171
Total cash and cash equivalents	34,443	20,668
Securities available for sale	293,028	220,201
Loans, net	1,183,431	762,488
Mortgage loans held for sale, net	12,712	45,322
Accrued interest receivable	8,032	5,744
Premises and equipment, net	22,156	9,790
Restricted equity securities, at cost	11,681	7,774
Other real estate, net	1,000	0
Cash surrender value of life insurance contracts	45,220	33,663
Deferred tax assets, net	9,214	1,099
Goodwill	43,642	11,404
Core deposit intangibles	8,456	1,280
Other assets	11,186	5,601
TOTAL ASSETS	1,684,201	1,125,034
Deposits
Demand	221,252	131,996
Interest-bearing demand	162,159	88,230
Savings and money market deposit accounts	358,934	205,230
Time	653,201	458,063
Total deposits	1,395,546	883,519
Accrued interest payable	1,150	305
Subordinated debentures	11,583	0
Federal Home Loan Bank advances	62,686	96,747
Dividends payable	922	542
Other liabilities	8,563	3,784
TOTAL LIABILITIES	1,480,450	984,897
STOCKHOLDERS’ EQUITY
Preferred stock, $1 par value; 10,000,000 shares authorized; no shares issued to date	0	0
Common stock, $1 par value; 30,000,000 shares authorized; 11,531,094 and 9,034,439 shares issued and outstanding at September 30, 2018, and December 31, 2017, respectively	11,531	9,034
Additional paid-in capital	172,930	112,437
Retained earnings	24,246	17,189
Accumulated other comprehensive gain (loss)	(4,956)	1,477
TOTAL STOCKHOLDERS’ EQUITY	203,751	140,137
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 1,684,201	$ 1,125,034

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - $ / shares	Sep. 30, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	30,000,000	30,000,000
Common stock, shares issued (in shares)	11,531,094	9,034,439
Common stock, shares outstanding (in shares)	11,531,094	9,034,439

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
INTEREST INCOME
Interest and fees on loans	$ 14,873	$ 9,078	$ 42,497	$ 25,193
Interest and fees on loans held for sale	294	211	1,101	420
Interest on investment securities, taxable	414	179	1,374	514
Interest on investment securities, nontaxable	1,709	1,022	4,921	2,796
Federal funds sold and other	280	137	869	381
TOTAL INTEREST INCOME	17,570	10,627	50,762	29,304
Deposits
Demand	102	42	263	131
Savings and money market deposit accounts	657	207	1,709	557
Time	2,542	1,117	6,737	2,663
Federal Home Loan Bank advances and other	606	165	1,275	383
Subordinated debentures	197	0	526	0
TOTAL INTEREST EXPENSE	4,104	1,531	10,510	3,734
NET INTEREST INCOME	13,466	9,096	40,252	25,570
PROVISION FOR LOAN LOSSES	322	540	759	1,195
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	13,144	8,556	39,493	24,375
NONINTEREST INCOME
Service charges on deposit accounts	833	309	2,504	936
Gains on mortgage loans sold, net	1,399	1,571	4,061	2,751
Gain on securities transactions, net	18	0	43	59
Gain on sale of other real estate	150	1	259	26
Gain (loss) on disposal of premises and equipment	16	(50)	16	(50)
Other	361	256	1,139	735
TOTAL NONINTEREST INCOME	2,777	2,087	8,022	4,457
NONINTEREST EXPENSE
Salaries and employee benefits	6,913	4,880	20,480	13,634
Occupancy	1,234	850	3,673	2,482
Information technology	1,315	732	3,913	1,924
Advertising and public relations	183	81	413	204
Audit, legal and consulting	588	501	2,027	1,102
Federal deposit insurance	210	100	630	320
Merger expenses	82	562	2,742	562
Other operating	1,637	791	4,487	2,406
TOTAL NONINTEREST EXPENSE	12,162	8,497	38,365	22,634
INCOME BEFORE PROVISION FOR INCOME TAXES	3,759	2,146	9,150	6,198
INCOME TAX EXPENSE	519	306	1,431	1,005
Net income (loss)	3,240	1,840	7,719	5,193
NONCONTROLLING INTEREST IN NET LOSS OF SUBSIDIARY	842	6	2,243	898
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	$ 4,082	$ 1,846	$ 9,962	$ 6,091
Basic net income attributable to common shareholders, per share (in dollars per share)	$ 0.36	$ 0.23	$ 0.88	$ 0.77
Diluted net income attributable to common shareholders, per share (in dollars per share)	$ 0.36	$ 0.22	$ 0.87	$ 0.76

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Consolidated net income	$ 3,240	$ 1,840	$ 7,719	$ 5,193
Other comprehensive income (loss)
Net unrealized gains (losses) on available for sale securities, net of tax of ($712) and $257 for the three months ended September 30, 2018 and 2017, respectively, and ($2,260) and $1,273 for the nine months ended September 30, 2018 and 2017, respectively	(2,023)	412	(6,401)	2,051
Reclassification adjustment for gains included in net income, net of tax of ($4) for the three months ended September 30, 2018, and ($11) and ($23) for the nine months ended September 30, 2018 and 2017, respectively	(14)	0	(32)	(36)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS)	(2,037)	412	(6,433)	2,015
TOTAL COMPREHENSIVE INCOME	$ 1,203	$ 2,252	$ 1,286	$ 7,208

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parentheticals) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net unrealized gains on available-for-sale securities, tax benefit	$ (712)	$ 257	$ (2,260)	$ 1,273
Reclassification adjustment for (gains) included in net income, tax	$ (4)	$ 0	$ (11)	$ (23)

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	COMMON STOCK	ADDITIONAL PAID-IN CAPITAL	RETAINED EARNINGS	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)	NONCONTROLLING INTEREST
BALANCE (in shares) at Dec. 31, 2016		7,778,309
BALANCE at Dec. 31, 2016	$ 106,919	$ 7,778	$ 89,045	$ 12,212	$ (2,116)	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation expense	412		412
Exercise of stock options (in shares)		59,739
Exercise of stock options	693	$ 60	633
Restricted stock awards (in shares)		50,050
Restricted stock awards	0	$ 50	(50)
Restricted stock forfeiture (in shares)		(3,000)
Restricted stock forfeiture	0	$ (3)	3
Common stock issuance (in shares)		1,137,000
Common stock issuance	25,014	$ 1,137	23,877
Stock issuance costs	(1,718)		(1,718)
Noncontrolling interest contributions	898					898
Cash dividends declared to common shareholders	(1,482)			(1,482)
Net income (loss)	5,193			6,091		(898)
Other comprehensive income (loss)	2,015				2,015
BALANCE (in shares) at Sep. 30, 2017		9,022,098
BALANCE at Sep. 30, 2017	$ 137,944	$ 9,022	112,202	16,821	(101)	0
BALANCE (in shares) at Dec. 31, 2017	9,034,439	9,034,439
BALANCE at Dec. 31, 2017	$ 140,137	$ 9,034	112,437	17,189	1,477	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock based compensation expense	$ 609		609
Exercise of stock options (in shares)	30,001	30,001
Exercise of stock options	$ 398	$ 30	368
Restricted stock awards (in shares)		51,210
Restricted stock awards	0	$ 51	(51)
Restricted stock forfeiture (in shares)		(1,000)
Restricted stock forfeiture	0	$ (1)	1
Common stock issuance (in shares)		2,416,444
Common stock issuance	61,983	$ 2,417	59,566
Noncontrolling interest contributions	2,243					2,243
Cash dividends declared to common shareholders	(2,905)			(2,905)
Net income (loss)	7,719			9,962		(2,243)
Other comprehensive income (loss)	$ (6,433)				(6,433)
BALANCE (in shares) at Sep. 30, 2018	11,531,094	11,531,094
BALANCE at Sep. 30, 2018	$ 203,751	$ 11,531	$ 172,930	$ 24,246	$ (4,956)	$ 0

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
OPERATING ACTIVITIES
Consolidated net income	$ 7,719	$ 5,193
Adjustments to reconcile consolidated net income to net cash provided by (used in) operating activities
Provision for loan losses	759	1,195
Provision to reflect market value of mortgage loans held for sale	196	(160)
Deferred income taxes (benefit)	(959)	(589)
Loss (gain) on disposal of premises and equipment	(16)	50
Depreciation and amortization of premises and equipment	1,235	762
Net amortization of securities	2,374	1,478
Net realized losses on sales of securities	(43)	(59)
Gains on mortgage loans sold, net	(4,061)	(2,751)
Stock-based compensation expense	609	412
Realization of gain on other real estate	(259)	(26)
Increase in cash surrender value of life insurance contracts	(893)	(595)
Mortgage loans originated for resale	(113,481)	(99,325)
Proceeds from sale of mortgage loans	150,866	94,592
Other amortization (accretion)	(615)	(260)
Change in
Accrued interest receivable	(1,123)	(1,213)
Other assets	(2,852)	5,701
Accrued interest payable	845	113
Other liabilities	778	1,525
TOTAL ADJUSTMENTS	33,360	850
NET CASH PROVIDED BY OPERATING ACTIVITIES	41,079	6,043
INVESTING ACTIVITIES
Cash received from merger	33,128	0
Activities in available for sale securities
Purchases	(103,375)	(68,010)
Sales	100,737	18,688
Maturities, prepayments and calls	10,125	6,057
Purchases of restricted equity securities	(2,181)	(30)
Loan originations and payments, net	(108,431)	(82,766)
Purchase of buildings, leasehold improvements, and equipment	(4,000)	(1,277)
Proceeds from sale of other real estate	1,947	0
Purchase of life insurance contracts	0	(4,000)
NET CASH USED IN INVESTING ACTIVITIES	(72,050)	(131,338)
FINANCING ACTIVITIES
Net change in deposits	79,588	76,614
Net change in federal funds purchased	0	(3,671)
Net change in advances from Federal Home Loan Bank	(34,020)	24,473
Issuance of common stock	398	23,989
Noncontrolling interest contributions received	1,305	1,245
Cash dividends paid on common stock	(2,525)	(2,652)
NET CASH PROVIDED BY FINANCING ACTIVITIES	44,746	119,998
NET CHANGE IN CASH AND CASH EQUIVALENTS	13,775	(5,297)
CASH AND CASH EQUIVALENTS - BEGINNING OF PERIOD	20,668	24,243
CASH AND CASH EQUIVALENTS - END OF PERIOD	34,443	18,946
Cash paid during the period for
Interest	9,665	3,621
Taxes	2,170	1,277
Non-cash investing and financing activities
Unrealized gain (loss) on securities available-for-sale	(9,742)	3,618
Unrealized gain (loss) on derivatives	1,038	(353)
Change in due to/from noncontrolling interest	2,243	898
Loans foreclosed and transferred to other real estate owned and foreclosed assets	$ 1,060	$ 0

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES The accounting and reporting policies of Reliant Bancorp, Inc. conform to accounting principles generally accepted in the United States of America and to general practices within the banking industry. The following is a brief summary of the significant policies. Nature of Operations Reliant Bancorp, Inc. ("Reliant Bancorp"), through its wholly owned subsidiary bank, Reliant Bank (the "Bank"), provides financial services through its offices in Williamson, Robertson, Davidson, Sumner, Rutherford, Maury, Hickman and Hamilton Counties in Tennessee. Its primary deposit products are checking, savings, and term certificate accounts, and its primary lending products are commercial and residential construction loans, commercial loans, installment loans and lines secured by home equity. Substantially all loans are secured by specific items of collateral including commercial and residential real estate, business assets, and consumer assets. Commercial loans are expected to be repaid from cash flow from operations of businesses. Basis of Presentation The accompanying unaudited consolidated financial statements have been prepared in accordance with instructions to Form 10-Q and therefore do not include all information and footnotes necessary for a fair presentation of financial position, results of operations, and cash flows in conformity with U.S. generally accepted accounting principles (U.S. GAAP). All adjustments consisting of normally recurring accruals that, in the opinion of management, are necessary for a fair presentation of the financial position and results of operations for the periods covered by the report have been included. The accompanying unaudited consolidated financial statements should be read in conjunction with Reliant Bancorp, Inc.’s consolidated financial statements and related notes appearing in Reliant Bancorp, Inc.’s Annual Report on Form 10-K for the year ended December 31, 2017 . The consolidated financial statements as of and for the periods presented include the accounts of Reliant Bancorp, the Bank, Community First TRUPS Holding Company, which is wholly owned by Reliant Bancorp (“TRUPS”), and Reliant Mortgage Ventures, LLC ("RMV"), of which the Bank controls 51% of the governance rights. Reliant Bancorp, the Bank, TRUPS, and RMV, are collectively referred to herein as the “Company”. As described in the notes to our annual consolidated financial statements, RMV is considered a variable interest entity for which the Bank is deemed to be the primary beneficiary. All significant intercompany balances and transactions have been eliminated in consolidation. As described in Note 12, Reliant Bancorp, Inc. and Community First, Inc. merged effective January 1, 2018. The accounting and reporting policies of the Company conform to accounting principles generally accepted in the United States of America ("U.S. GAAP") and to general practices in the banking industry. Use of Estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions based on available information. These estimates and assumptions affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the 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 determination of the allowance for loan losses, the valuation of other real estate, the valuation of debt and equity securities, the valuation of deferred tax assets and fair values of financial instruments. NOTE 1 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED) Use of Estimates (Continued) The consolidated financial statements as of September 30, 2018 , and for the three and nine months ended September 30, 2018 and 2017 , included herein have not been audited. The accounting and reporting policies of the Company conform to U.S. GAAP and Article 8 of Regulation S-X. Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission, although the Company believes that the disclosures made are adequate to make the information not misleading. The accompanying consolidated financial statements reflect all adjustments, which are, in the opinion of management, necessary to present a fair statement of the results for the interim periods presented. Such adjustments are of a normal recurring nature. The Company evaluates subsequent events through the date of filing. Certain prior period amounts have been reclassified to conform to the current period presentation. The results for the three and nine months ended September 30, 2018 are not necessarily indicative of the results that may be expected for the year ending December 31, 2018 . Reclassifications Certain reclassifications were made to the September 30, 2017 financial statement presentation in order to conform to the September 30, 2018 financial statement presentation. Total shareholder's equity and net income are unchanged due to these reclassifications.

Securities

Securities	9 Months Ended
	Sep. 30, 2018
Investments, Debt and Equity Securities [Abstract]
SECURITIES	SECURITIES The amortized cost and fair value of available for sale securities and the related gross unrealized gains and losses recognized in accumulated other comprehensive loss at September 30, 2018 and accumulated other comprehensive income at December 31, 2017 were as follows: September 30, 2018 Amortized Gross Gross Estimated U. S. Treasury and other U. S. government agencies $ 573 $ — $ (20 ) $ 553 State and municipal 233,929 320 (6,741 ) 227,508 Corporate bonds 3,130 2 (103 ) 3,029 Mortgage backed securities 29,335 10 (478 ) 28,867 Asset backed securities 30,279 — (708 ) 29,571 Time deposits 3,500 — — 3,500 Total $ 300,746 $ 332 $ (8,050 ) $ 293,028 December 31, 2017 Amortized Gross Gross Estimated U. S. Treasury and other U. S. government agencies $ 586 $ — $ (8 ) $ 578 State and municipal 189,576 3,081 (905 ) 191,752 Corporate bonds 1,500 5 (13 ) 1,492 Mortgage backed securities 6,262 3 (96 ) 6,169 Asset backed securities 16,753 45 (88 ) 16,710 Time deposits 3,500 — — 3,500 Total $ 218,177 $ 3,134 $ (1,110 ) $ 220,201 NOTE 2 - SECURITIES (CONTINUED) Securities pledged at September 30, 2018 and December 31, 2017 had a carrying amount of $70,833 and $78,220 , respectively, and were pledged to collateralize Federal Home Loan Bank advances, Federal Reserve advances and municipal deposits. At September 30, 2018 and December 31, 2017 , there were no holdings of securities of any one issuer in an amount greater than 10% of stockholders’ equity. The fair value of available for sale debt securities at September 30, 2018 by contractual maturity are provided below. Actual maturities may differ from contractual maturities for mortgage and asset backed securities since the underlying asset may be called or prepaid with or without penalty. Securities not due at a single maturity date are shown separately. Amortized Cost Estimated Fair Value Due within one year $ 1,756 $ 1,753 Due in one to five years 7,066 7,019 Due in five to ten years 13,090 12,797 Due after ten years 219,220 213,021 Mortgage backed securities 29,335 28,867 Asset backed securities 30,279 29,571 Total $ 300,746 $ 293,028 The following table shows available for sale securities with unrealized losses and their estimated fair value aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of September 30, 2018 : Less than 12 months 12 months or more Total Estimated Fair Value Unrealized Loss Estimated Unrealized Estimated Unrealized Description of Securities U. S. Treasury and other U. S. government agencies $ 72 $ 2 $ 481 $ 18 $ 553 $ 20 State and municipal 157,984 4,455 38,571 2,286 196,555 6,741 Corporate bonds 2,035 95 492 8 2,527 103 Mortgage backed securities 20,440 367 2,136 111 22,576 478 Asset backed securities 27,965 685 1,116 23 29,081 708 Total temporarily impaired $ 208,496 $ 5,604 $ 42,796 $ 2,446 $ 251,292 $ 8,050 NOTE 2 - SECURITIES (CONTINUED) The following table shows available for sale securities with unrealized losses and their estimated fair value aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of December 31, 2017 : Less than 12 months 12 months or more Total Estimated Unrealized Estimated Unrealized Estimated Unrealized Description of Securities U. S. Treasury and other U. S. government agencies $ 86 $ 1 $ 491 $ 7 $ 577 $ 8 State and municipal 19,899 128 34,946 777 54,845 905 Corporate bonds — — 487 13 487 13 Mortgage backed securities 2,412 14 3,349 82 5,761 96 Asset backed securities 8,971 73 854 15 9,825 88 Total temporarily impaired $ 31,368 $ 216 $ 40,127 $ 894 $ 71,495 $ 1,110 Management has the intent and ability to hold all securities in an unrealized loss position for the foreseeable future, and the decline in fair value is largely due to changes in interest rates and the change in the federal tax rate. The fair value is expected to recover as the securities approach their maturity date and/or market rates decline. There were 275 and 120 securities in an unrealized loss position as of September 30, 2018 and December 31, 2017 , respectively.

Loans and Allowance for Loan Lo

Loans and Allowance for Loan Losses	9 Months Ended
	Sep. 30, 2018
Receivables [Abstract]
LOANS AND ALLOWANCE FOR LOAN LOSSES	LOANS AND ALLOWANCE FOR LOAN LOSSES Loans at September 30, 2018 and December 31, 2017 were comprised as follows: September 30, 2018 December 31, 2017 Commercial, Industrial and Agricultural $ 209,608 $ 138,706 Real Estate 1-4 Family Residential 228,014 111,932 1-4 Family HELOC 86,778 72,017 Multi-family and Commercial 433,882 261,044 Construction, Land Development and Farmland 199,849 156,452 Consumer 21,533 17,605 Other 14,444 14,694 1,194,108 772,450 Less Deferred loan (fees) costs (21 ) 231 Allowance for possible loan losses 10,698 9,731 Loans, net $ 1,183,431 $ 762,488 NOTE 3 - LOANS AND ALLOWANCE FOR LOAN LOSSES (CONTINUED) Activity in the allowance for loan losses by portfolio segment was as follows for the nine months ended September 30, 2018 : Commercial Industrial and Agricultural Multi-family and Commercial Real Estate Construction Land Development and Farmland 1-4 Family Residential Real Estate Beginning balance $ 2,538 $ 3,166 $ 2,434 $ 773 Charge-offs (308 ) (76 ) (144 ) (36 ) Recoveries 530 215 44 11 Provision (734 ) 813 56 573 Ending balance $ 2,026 $ 4,118 $ 2,390 $ 1,321 1-4 Family HELOC Consumer Other Total Beginning balance $ 595 $ 183 $ 42 $ 9,731 Charge-offs (6 ) (24 ) (37 ) (631 ) Recoveries 7 29 3 839 Provision 24 (2 ) 29 759 Ending balance $ 620 $ 186 $ 37 $ 10,698 Activity in the allowance for loan losses by portfolio segment was as follows for the nine months ended September 30, 2017 : Commercial Industrial and Agricultural Multi-family and Commercial Real Estate Construction Land Development and Farmland 1-4 Family Residential Real Estate Beginning balance $ 2,438 $ 2,731 $ 1,786 $ 1,178 Charge-offs (941 ) — — (15 ) Recoveries 306 — 5 — Provision 872 363 356 (296 ) Ending balance $ 2,675 $ 3,094 $ 2,147 $ 867 1-4 Family HELOC Consumer Other Total Beginning balance $ 704 $ 208 $ 37 $ 9,082 Charge-offs — (30 ) — (986 ) Recoveries 19 2 — 332 Provision (110 ) 9 1 1,195 Ending balance $ 613 $ 189 $ 38 $ 9,623 NOTE 3 - LOANS AND ALLOWANCE FOR LOAN LOSSES (CONTINUED) The allowance for loan losses and the recorded investment in loans by portfolio segment and based on impairment method as of September 30, 2018 was as follows: Commercial Industrial and Agricultural Multi-family and Commercial Real Estate Construction Land Development and Farmland 1-4 Family Residential Real Estate Allowance for loan losses Individually evaluated for impairment $ 334 $ — $ 67 $ 23 Acquired with credit impairment — — — — Collectively evaluated for impairment 1,692 4,118 2,323 1,298 Total $ 2,026 $ 4,118 $ 2,390 $ 1,321 Loans Individually evaluated for impairment $ 1,485 $ 1,173 $ 2,314 $ 2,241 Acquired with credit impairment 40 236 1,762 268 Collectively evaluated for impairment 208,083 432,473 195,773 225,505 Total $ 209,608 $ 433,882 $ 199,849 $ 228,014 1-4 Family HELOC Consumer Other Total Allowance for loan losses Individually evaluated for impairment $ — $ — $ — $ 424 Acquired with credit impairment — — — — Collectively evaluated for impairment 620 186 37 10,274 Total $ 620 $ 186 $ 37 $ 10,698 Loans Individually evaluated for impairment $ 90 $ 12 $ — $ 7,315 Acquired with credit impairment — 11 — 2,317 Collectively evaluated for impairment 86,688 21,510 14,444 1,184,476 Total $ 86,778 $ 21,533 $ 14,444 $ 1,194,108 NOTE 3 - LOANS AND ALLOWANCE FOR LOAN LOSSES (CONTINUED) The allowance for loan losses and the recorded investment in loans by portfolio segment and based on impairment method as of December 31, 2017 was as follows: Commercial Industrial and Agricultural Multi-family and Commercial Real Estate Construction Land Development and Farmland 1-4 Family Residential Real Estate Allowance for loan losses Individually evaluated for impairment $ 606 $ — $ 57 $ — Acquired with credit impairment 2 — 2 — Collectively evaluated for impairment 1,930 3,166 2,375 773 Total $ 2,538 $ 3,166 $ 2,434 $ 773 Loans Individually evaluated for impairment $ 3,649 $ 1,921 $ 3,800 $ 2,114 Acquired with credit impairment 276 1,157 1,436 45 Collectively evaluated for impairment 134,781 257,966 151,216 109,773 Total $ 138,706 $ 261,044 $ 156,452 $ 111,932 1-4 Family HELOC Consumer Other Total Allowance for loan losses Individually evaluated for impairment $ — $ — $ — $ 663 Acquired with credit impairment — — — 4 Collectively evaluated for impairment 595 183 42 9,064 Total $ 595 $ 183 $ 42 $ 9,731 Loans Individually evaluated for impairment $ 90 $ — $ — $ 11,574 Acquired with credit impairment — — — 2,914 Collectively evaluated for impairment 71,927 17,605 14,694 757,962 Total $ 72,017 $ 17,605 $ 14,694 $ 772,450 Risk characteristics relevant to each portfolio segment are as follows: Commercial, industrial and agricultural: The commercial, industrial and agricultural loan portfolio segment includes loans to commercial customers for use in normal business operations to finance working capital needs, equipment purchases or other expansion projects. Collection risk in this portfolio is driven by the creditworthiness of underlying borrowers, particularly cash flow from customers’ business operations. Commercial, industrial and agricultural loans are primarily made based on the identified cash flows of the borrower and secondarily on the underlying collateral provided by the borrower. The cash flows of borrowers, however, may not be as expected and the collateral securing these loans may fluctuate in value. Most commercial and industrial loans are secured by the assets being financed or other business assets such as accounts receivable or inventory and may incorporate a personal guarantee; however, some short-term loans may be made on an unsecured basis. NOTE 3 - LOANS AND ALLOWANCE FOR LOAN LOSSES (CONTINUED) Multi-family and commercial real estate: Multi-family and commercial real estate and multi-family loans are subject to underwriting standards and processes similar to commercial, industrial and agricultural loans, in addition to those of real estate loans. These loans are viewed primarily as cash flow loans and secondarily as loans secured by real estate. Commercial real estate lending typically involves higher loan principal amounts and the repayment of these loans is generally largely dependent on the successful operation of the property securing the loan or the business conducted on the property securing the loan. Commercial real estate loans may be more adversely affected by conditions in the real estate markets or in the general economy. The properties securing the Company’s commercial real estate portfolio are diverse in terms of type. This diversity helps reduce the Company’s exposure to adverse economic events that affect any single market or industry. Management monitors and evaluates commercial real estate loans based on collateral, geography and risk grade criteria. The Company also utilizes third-party experts to provide insight and guidance about economic conditions and trends affecting the market areas it serves. In addition, management tracks the level of owner-occupied commercial real estate loans versus non-owner occupied loans. Non-owner occupied commercial real estate loans are loans secured by multifamily and commercial properties where the primary source of repayment is derived from rental income associated with the property (that is, loans for which 50 percent or more of the source of repayment comes from third party, nonaffiliated, rental income) or the proceeds of the sale, refinancing, or permanent financing of the property. These loans are made to finance income-producing properties such as apartment buildings, office and industrial buildings, and retail properties. Owner-occupied commercial real estate loans are loans where the primary source of repayment is the cash flow from the ongoing operations and business activities conducted by the party, or affiliate of the party, who owns the property. Construction and land development: Loans for non-owner-occupied real estate construction or land development are generally repaid through cash flow related to the operation, sale or refinance of the property. The Company also finances construction loans for owner-occupied properties. A portion of the Company’s construction and land portfolio segment is comprised of loans secured by residential product types (residential land and single-family construction). With respect to construction loans to developers and builders that are secured by non-owner occupied properties that the Company may originate from time to time, the Company generally requires the borrower to have had an existing relationship with the Company and have a proven record of success. Construction and land development loans are underwritten utilizing feasibility studies, independent appraisal reviews, sensitivity analysis of absorption and lease rates, market sales activity, and financial analysis of the developers and property owners. Construction loans are generally based upon estimates of costs and value associated with the complete project. These estimates may be inaccurate. Construction loans often involve the disbursement of substantial funds with repayment substantially dependent on the success of the ultimate project. Sources of repayment for these types of loans may be pre-committed permanent loans from approved long-term lenders, sales of developed property or an interim loan commitment from the Company until permanent financing is obtained. These loans are closely monitored by on-site inspections and are considered to have higher risks than other real estate loans due to their ultimate repayment being sensitive to interest rate changes, governmental regulation of real property, general economic conditions and the availability of long-term financing. 1-4 family residential real estate: Residential real estate loans represent loans to consumers or investors to finance a residence. These loans are typically financed on 15 to 30 year amortization terms, but generally with shorter maturities of 5 to 15 years. Many of these loans are extended to borrowers to finance their primary or secondary residence. Loans to an investor secured by a 1-4 family residence will be repaid from either the rental income from the property or from the sale of the property. This loan segment also includes closed-end home equity loans that are secured by a first or second mortgage on the borrower’s residence. This allows customers to borrow against the equity in their home. Loans in this portfolio segment are underwritten and approved based on a number of credit quality criteria including limits on maximum Loan-to-Value (LTV), minimum credit scores, and maximum debt to income. Real estate market values as of the time the loan is made directly affect the amount of credit extended and, in addition, changes in these residential property values impact the depth of potential losses in this portfolio segment. NOTE 3 - LOANS AND ALLOWANCE FOR LOAN LOSSES (CONTINUED) 1-4 family HELOC: This loan segment includes open-end home equity loans that are secured by a first or second mortgage on the borrower’s residence. This allows customers to borrow against the equity in their home utilizing a revolving line of credit. These loans are underwritten and approved based on a number of credit quality criteria including limits on maximum LTV, minimum credit scores, and maximum debt to income. Real estate market values as of the time the loan is made directly affect the amount of credit extended and, in addition, changes in these residential property values impact the depth of potential losses in this portfolio segment. Because of the revolving nature of these loans as well as the fact that many represent second mortgages, this portfolio segment can contain more risk than the amortizing 1-4 family residential real estate loans. Consumer: The consumer loan portfolio segment includes non-real estate secured direct loans to consumers for household, family, and other personal expenditures. Consumer loans may be secured or unsecured and are usually structured with short or medium term maturities. These loans are underwritten and approved based on a number of consumer credit quality criteria including limits on maximum LTV on secured consumer loans, minimum credit scores, and maximum debt to income. Many traditional forms of consumer installment credit have standard monthly payments and fixed repayment schedules of one to five years. These loans are made with either fixed or variable interest rates that are based on specific indices. Installment loans fill a variety of needs, such as financing the purchase of an automobile, a boat, a recreational vehicle, or other large personal items, or for consolidating debt. These loans may be unsecured or secured by an assignment of title, as in an automobile loan, or by money in a bank account. In addition to consumer installment loans, this portfolio segment also includes secured and unsecured personal lines of credit as well as overdraft protection lines. Loans in this portfolio segment are sensitive to unemployment and other key consumer economic measures. Non-accrual loans by class of loan were as follows at September 30, 2018 and December 31, 2017 : September 30, 2018 December 31, 2017 Commercial, Industrial and Agricultural $ 750 $ 2,110 Multi-family and Commercial Real Estate — — Construction, Land Development and Farmland 2,112 2,518 1-4 Family Residential Real Estate 1,317 533 1-4 Family HELOC — — Consumer 56 — Total $ 4,235 $ 5,161 Performing non-accrual loans totaled $2,492 and $1,096 at September 30, 2018 and December 31, 2017 , respectively. NOTE 3 - LOANS AND ALLOWANCE FOR LOAN LOSSES (CONTINUED) Individually impaired loans by class of loans were as follows at September 30, 2018 : Unpaid Principal Balance Recorded Investment with no Allowance Recorded Recorded Investment with Allowance Recorded Total Recorded Investment Related Allowance Commercial, Industrial and Agricultural $ 1,897 $ 976 $ 549 $ 1,525 $ 334 Multi-family and Commercial Real Estate 1,691 1,409 — 1,409 — Construction, Land Development and Farmland 5,678 3,459 617 4,076 67 1-4 Family Residential Real Estate 3,501 2,377 132 2,509 23 1-4 Family HELOC 90 90 — 90 — Consumer 29 23 — 23 — Total $ 12,886 $ 8,334 $ 1,298 $ 9,632 $ 424 Individually impaired loans by class of loans were as follows at December 31, 2017 : Unpaid Principal Balance Recorded Investment with no Allowance Recorded Recorded Investment with Allowance Recorded Total Recorded Investment Related Allowance Commercial, Industrial and Agricultural $ 4,398 $ 2,959 $ 966 $ 3,925 $ 608 Multi-family and Commercial Real Estate 3,427 3,078 — 3,078 — Construction, Land Development and Farmland 5,317 3,249 1,987 5,236 59 1-4 Family Residential Real Estate 2,857 2,159 — 2,159 — 1-4 Family HELOC 90 90 — 90 — Total $ 16,089 $ 11,535 $ 2,953 $ 14,488 $ 667 The average balances of impaired loans for the nine months ended September 30, 2018 and 2017 were as follows: 2018 2017 Commercial, Industrial and Agricultural $ 2,661 $ 5,550 Multi-family and Commercial Real Estate 2,610 4,403 Construction, Land Development and Farmland 4,831 4,319 1-4 Family Residential Real Estate 2,708 2,225 1-4 Family HELOC 90 957 Consumer 72 — Total $ 12,972 $ 17,454 NOTE 3 - LOANS AND ALLOWANCE FOR LOAN LOSSES (CONTINUED) The Company utilizes a risk grading system to monitor the credit quality of the Company’s commercial loan portfolio which consists of commercial, industrial and agricultural, commercial real estate and construction loans. Loans are graded on a scale of 1to 9. Grades 1 -5 are pass credits, grade 6 is special mention, grade 7 is substandard, grade 8 is doubtful and grade 9 is loss. A description of the risk grades are as follows: Grade 1 - Minimal Risk (Pass) This grade includes loans to borrowers with a strong financial position and history of profits and cash flows sufficient to service the debt. These borrowers have well defined sources of primary/secondary repayment, conservatively leveraged balance sheets and the ability to access a wide range of financing alternatives. Collateral securing these loans is negotiable, of sufficient value and in possession of the Company. Risk of loss is unlikely. Grade 2 - High Quality (Pass) This grade includes loans to borrowers with a strong financial condition reflecting dependable net profits and cash flows. The borrower has verifiable liquid net worth providing above average asset protection. An identifiable market exists for the collateral. Risk of loss is unlikely. Grade 3 - Above Average (Pass) This grade includes loans to borrowers with a balance sheet that reflects a comfortable degree of leverage and liquidity. Borrowers are profitable and have a sustained record of servicing debt. An identifiable market exists for the collateral, but liquidation could take up to one year. Risk of loss is unlikely. Grade 4 - Average (Pass) This grade includes loans to borrowers with a financial condition that is satisfactory and comparable to industry standards. The borrower has verifiable net worth, providing over time, average asset protection. Borrower cash flows are sufficient to satisfy debt service requirements. Risk of loss is below average. Grade 5 - Acceptable (Management Attention) (Pass) This grade includes loans to borrowers whose loans are performing, but sources of repayment are not documented by the current credit analysis. There are some declining trends in margins, ratios and/or cash flow. Guarantor(s) have strong net worth(s), but assets may be concentrated in real estate or other illiquid investments. Risk of loss is average. Grade 6 - Special Mention Special mention assets have potential weaknesses that may, if not checked or corrected, weaken the asset or inadequately protect the Company’s position at some future date. These assets pose elevated risk, but their weakness does not yet justify a substandard classification. Borrowers may be experiencing adverse operating trends (declining revenues or margins) or an ill proportioned balance sheet (e.g., increasing inventory without an increase in sales, high leverage, tight liquidity). Adverse economic or market conditions, such as interest rate increases or the entry of a new competitor, may also support a special mention rating. Nonfinancial reasons for rating a credit exposure special mention include management problems, pending litigation, an ineffective loan agreement or other material structural weakness, and any other significant deviation from prudent lending practices. The special mention rating is designed to identify a specific level of risk and concern about asset quality . Although a special mention asset has a higher probability of default than a pass asset, its default is not imminent. NOTE 3 - LOANS AND ALLOWANCE FOR LOAN LOSSES (CONTINUED) Grade 7 - Substandard A ‘‘substandard’’ extension of credit is inadequately protected by the current sound worth and paying capacity of the obligor or of the collateral pledged, if any. Extensions of credit so classified should have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the Company will sustain some loss if the deficiencies are not corrected. Loss potential, while existing in the aggregate amount of substandard credits, does not have to exist in individual extensions of credit classified substandard. Substandard assets have a high probability of payment default, or they have other well-defined weaknesses. They require more intensive supervision by Company management. Substandard assets are generally characterized by current or expected unprofitable operations, inadequate debt service coverage, inadequate liquidity, or marginal capitalization. Repayment may depend on collateral or other credit risk mitigation. Grade 8 - Doubtful An extension of credit classified ‘‘doubtful’’ has all the weaknesses inherent in one classified substandard, with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable. The possibility of loss is extremely high, but because of certain important and reasonably specific pending factors that may work to the advantage of and strengthen the credit, its classification as an estimated loss is deferred until its more exact status may be determined. Pending factors may include a proposed merger or acquisition, liquidation proceedings, capital injection, perfecting liens on additional collateral, or refinancing plans. Generally, the doubtful classification should not extend for a long period of time because in most cases the pending factors or events that warranted the doubtful classification should be resolved either positively or negatively in a reasonable period of time. Grade 9 - Loss Extensions of credit classified ‘‘loss’’ are considered uncollectible and of such little value that their continuance as bankable assets is not warranted. This classification does not mean that the credit has absolutely no recovery or salvage value, but rather that it is not practical or desirable to defer writing off this basically worthless asset even though partial recovery may be affected in the future. Amounts classified loss should be promptly charged off. The Company will not attempt long term recoveries while the credit remains on the Company’s books. Losses should be taken in the period in which they surface as uncollectible. With loss assets, the underlying borrowers are often in bankruptcy, have formally suspended debt repayments, or have otherwise ceased normal business operations. Once an asset is classified loss, there is little prospect of collecting either its principal or interest. Non-commercial purpose loans are initially assigned a default loan grade of 99 (Pass) and are risk graded (Grade 6, 7, or 8) according to delinquency status when applicable. Credit quality indicators by class of loan were as follows at September 30, 2018 : Pass Special Mention Substandard Total Commercial, Industrial and Agricultural $ 206,847 $ — $ 2,761 $ 209,608 1-4 Family Residential Real Estate 222,315 1,130 4,569 228,014 1-4 Family HELOC 85,848 — 930 86,778 Multi-family and Commercial Real Estate 430,379 1,566 1,937 433,882 Construction, Land Development and Farmland 195,623 642 3,584 199,849 Consumer 21,272 — 261 21,533 Other 14,444 — — 14,444 Total $ 1,176,728 $ 3,338 $ 14,042 $ 1,194,108 NOTE 3 - LOANS AND ALLOWANCE FOR LOAN LOSSES (CONTINUED) Credit quality indicators by class of loan were as follows at December 31, 2017 : Pass Special Mention Substandard Total Commercial, Industrial and Agricultural $ 135,833 $ 5 $ 2,868 $ 138,706 1-4 Family Residential Real Estate 108,426 1,392 2,114 111,932 1-4 Family HELOC 71,927 — 90 72,017 Multi-family and Commercial Real Estate 259,123 — 1,921 261,044 Construction, Land Development and Farmland 149,886 2,998 3,568 156,452 Consumer 17,605 — — 17,605 Other 14,694 — — 14,694 Total $ 757,494 $ 4,395 $ 10,561 $ 772,450 Past due status by class of loan was as follows at September 30, 2018 : 30-59 Days Past Due 60-89 Days Past Due 90+ Days Past Due Total Past Due Current Total Loans Commercial, Industrial and Agricultural $ 95 $ — $ 573 $ 668 $ 208,940 $ 209,608 1-4 Family Residential Real Estate 572 1,160 129 1,861 226,153 228,014 1-4 Family HELOC 50 — — 50 86,728 86,778 Multi-family and Commercial Real Estate — 245 — 245 433,637 433,882 Construction, Land Development and Farmland — — 989 989 198,860 199,849 Consumer 30 1 40 71 21,462 21,533 Other — — — — 14,444 14,444 Total $ 747 $ 1,406 $ 1,731 $ 3,884 $ 1,190,224 $ 1,194,108 Past due status by class of loan was as follows at December 31, 2017 : 30-59 Days Past Due 60-89 Days Past Due 90+ Days Past Due Total Past Due Current Total Loans Commercial, Industrial and Agricultural $ 7 $ — $ 1,548 $ 1,555 $ 137,151 $ 138,706 1-4 Family Residential Real Estate 617 — — 617 111,315 111,932 1-4 Family HELOC — 7 — 7 72,010 72,017 Multi-family and Commercial Real Estate 1,254 — — 1,254 259,790 261,044 Construction, Land Development and Farmland 265 444 2,073 2,782 153,670 156,452 Consumer 14 — — 14 17,591 17,605 Other — — — — 14,694 14,694 Total $ 2,157 $ 451 $ 3,621 $ 6,229 $ 766,221 $ 772,450 NOTE 3 - LOANS AND ALLOWANCE FOR LOAN LOSSES (CONTINUED) There was a loan totaling $40 past due 90 days or more and still accruing interest at September 30, 2018 . There were no loans past due 90 days or more still accruing interest at December 31, 2017 . The following table presents loans by class modified as troubled debt restructurings that occurred during the first nine months of 2018 and 2017: Number of Contracts Pre-Modification Outstanding Recorded Investments Post-Modification Outstanding Recorded Investments September 30, 2018 1-4 Family Residential 1 $ 1,254 $ 1,254 Multi-family and Commercial Real Estate 1 661 585 Total 2 $ 1,915 $ 1,839 September 30, 2017 1-4 Family Residential 1 108 108 Commercial, Industrial and Agricultural 1 790 320 Total 2 $ 898 $ 428 One modification that occurred during the nine months ended September 30, 2018 , consisted of an interest only monthly payment restructure and had no effect on the allowance for loan losses or interest income. The other modification was a restructure of five loans, including purchased credit impaired loans, in which a charge off occurred of $76 , resulting in one remaining loan of $585 . During the nine months ended September 30, 2017 , two loans totaling $428 were modified in trouble debt restructurings. One modification consisted of a partial charge off, totaling $470 , and a payment restructure with the modification having no effect on interest income. The other modification consisted of a temporary reduction in required monthly payments and had no effect on the allowance for loan losses or interest income. During the three months ended September 30, 2018 , the 1-4 Family Residential loan with a related balance of $1,254 was paid. The Company has acquired loans for 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 outstanding balance and carrying amount of the purchased credit impaired loans was as follows at September 30, 2018 and December 31, 2017 : September 30, 2018 December 31, 2017 Commercial, Industrial and Agricultural $ 63 $ 298 Multi-family and Commercial Real Estate 238 1,217 Construction, Land Development and Farmland 1,969 1,508 1-4 Family Residential Real Estate 330 47 1-4 Family HELOC — — Consumer 17 — Total outstanding balance 2,617 3,070 Less remaining purchase discount 300 156 Allowance for loan losses — 4 Carrying amount, net of allowance $ 2,317 $ 2,910 NOTE 3 - LOANS AND ALLOWANCE FOR LOAN LOSSES (CONTINUED) Activity related to the accretable portion of the purchase discount on loans acquired with deteriorated credit quality is as follows for the quarters and nine months ended September 30, 2018 and 2017 : 2018 2017 Balance at January 1, $ — $ 87 New accretable loan discount 424 — Loan payoffs (46 ) — Accretion income (38 ) (18 ) Balance at March 31, 340 69 Accretion income (95 ) (17 ) Balance at June 30, 245 52 Loan charge offs (74 ) — Accretion income — (33 ) Balance at September 30, $ 171 $ 19

Other Real Estate

Other Real Estate	9 Months Ended
	Sep. 30, 2018
Banking and Thrift [Abstract]
OTHER REAL ESTATE	OTHER REAL ESTATE In connection with the merger with Community First, the Company acquired three real estate parcels. The Company valued the properties at their estimated fair values less costs to sale which totaled $1,650 . During the nine months ended September 30, 2018 and 2017 , the Company sold parcels for a gain of $259 and $26 , respectively. During the nine months ended September 30, 2018 , the Company transferred from loans to other real estate two properties totaling $1,060 . At September 30, 2018 , there were three loans in the process of foreclosure with related balances totaling $1,526 .

Fair Values of Assets and Liabi

Fair Values of Assets and Liabilities	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
FAIR VALUES OF ASSETS AND LIABILITIES	FAIR VALUES OF ASSETS AND LIABILITIES Financial accounting standards relating to fair value measurements establish a framework for measuring fair value. That framework provides a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy are described below: Level 1 Inputs to the valuation methodology are unadjusted quoted prices for identical assets or liabilities in active markets that the Company has the ability to access. Level 2 Inputs to the valuation methodology include: • Quoted prices for similar assets or liabilities in active markets; • Quoted prices for identical or similar assets or liabilities in inactive markets; • Inputs other than quoted prices that are observable for the asset or liability; • Inputs that are derived principally from or corroborated by the observable market data by correlation or other means. If the asset or liability has a specified (contractual) term, the Level 2 input must be observable for substantially the full term of the asset or liability. Level 3 Inputs to the valuation methodology are unobservable and reflect an entity’s own assumptions about the assumptions that market participants would use in pricing the assets or liabilities. NOTE 5 - FAIR VALUES OF ASSETS AND LIABILITIES (CONTINUED) An asset’s or liability’s fair value measurement level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Valuation techniques should maximize the use of observable inputs and minimize the use of unobservable inputs. Following is a description of the valuation methodologies used for assets and liabilities measured at fair value on a recurring basis: Securities available for sale: The fair values of securities available for sale are determined by obtaining quoted prices on nationally recognized securities exchanges (Level 1 inputs) or matrix pricing, which is a mathematical technique widely used in the industry to value debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the securities’ relationship to other benchmark quoted securities (Level 2 inputs). The Company obtains fair value measurements for securities available for sale from an independent pricing service. The fair value measurements consider observable data that may include benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers, cash flows and reference data, including market research publications, among other things. Interest rate swaps: The fair values of interest rate swaps are determined based on discounted future cash flows. Certain assets and liabilities are measured at fair value on a nonrecurring basis; that is, the instruments are not measured at fair value on an ongoing basis, but are subject to fair value adjustments in certain circumstances (for example, when there is evidence of impairment). Assets and liabilities measured at fair value on a nonrecurring basis include the following: Impaired Loans : The fair value of impaired loans with specific allocations of the allowance for loan losses is generally based on the present value of expected payments using the loan’s effective rate as the discount rate or recent real estate appraisals. These appraisals may utilize a single valuation approach or a combination of approaches including comparable sales and the income approach. Adjustments are routinely made in the appraisal process by the appraisers to adjust for differences between the comparable sales and income data available. Such adjustments are typically significant and result in a Level 3 classification of the inputs for determining fair value. Mortgage Loans Held For Sale: Bid quotes are presently used for the fair value estimate of mortgage loans held for sale, while previously, a pricing model of an independent entity was used to estimate the fair value of mortgage loans held for sale. The methods described above may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. Furthermore, while the Company’s valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value at the reporting date. Fair value estimates involve uncertainties and matters of significant judgment regarding interest rates, credit risk, prepayments, and other factors, especially in the absence of broad markets for particular items. Changes in assumptions or in market conditions could significantly affect the estimates. NOTE 5 - FAIR VALUES OF ASSETS AND LIABILITIES (CONTINUED) The following table sets forth the Company’s major categories of assets and liabilities measured at fair value on a recurring basis, by level within the fair value hierarchy, as of September 30, 2018 and December 31, 2017 : Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) September 30, 2018 Assets U. S. Treasury and other U. S. government agencies $ 553 $ — $ 553 $ — State and municipal 227,508 — 227,508 — Corporate bonds 3,029 — 3,029 — Mortgage backed securities 28,867 — 28,867 — Time deposits 3,500 3,500 — — Interest rate swaps 1,013 — 1,013 — December 31, 2017 Assets U. S. Treasury and other U. S. government agencies $ 578 $ — $ 578 $ — State and municipal 191,752 — 191,752 — Corporate bonds 1,492 — 1,492 — Mortgage backed securities 6,169 — 6,169 — Time deposits 3,500 3,500 — — Interest rate swaps 155 — 155 — Liabilities Interest rate swaps $ 180 $ — $ 180 $ — NOTE 5 - FAIR VALUES OF ASSETS AND LIABILITIES (CONTINUED) The following table sets forth the Company’s major categories of assets and liabilities measured at fair value on a nonrecurring basis, by level within the fair value hierarchy, as of September 30, 2018 and December 31, 2017 : Fair Value Quoted Significant Significant September 30, 2018 Assets Impaired loans $ 874 $ — $ — $ 874 Mortgage loans held for sale 12,712 — 12,712 — Other real estate owned 1,000 — — 1,000 December 31, 2017 Assets Impaired loans $ 2,286 $ — $ — $ 2,286 The following table presents additional quantitative information about assets measured at fair value on a nonrecurring basis and for which we have utilized Level 3 inputs to determine fair value at September 30, 2018 and December 31, 2017 : Valuation Techniques (1) Significant Unobservable Inputs Range (Weighted Average) Impaired loans Appraisal Estimated costs to sell 10% Mortgage loans held for sale Market bids Not Applicable Not Applicable Other real estate owned Appraisal Estimated costs to sell 10% (1) The fair value is generally determined through independent appraisals of the underlying collateral, which may include Level 3 inputs that are not identifiable, or by using the discounted cash flow method if the loan is not collateral dependent. Estimated cash flows change and appraised values of the assets or collateral underlying the loans will be sensitive to changes. NOTE 5 - FAIR VALUES OF ASSETS AND LIABILITIES (CONTINUED) Carrying amounts and estimated fair values of financial instruments not reported at fair value at September 30, 2018 were as follows: Carrying Amount Estimated Fair Value Quoted Significant Significant Financial assets Cash and due from banks $ 34,026 $ 34,026 $ 34,026 $ — $ — Federal funds sold 417 417 — 417 — Loans, net 1,183,431 1,172,723 — — 1,172,723 Accrued interest receivable 8,032 8,032 — 8,032 — Restricted equity securities 11,681 11,681 — 11,681 — Financial liabilities Deposits $ 1,395,546 1,388,931 — — 1,388,931 Accrued interest payable 1,150 1,150 — 1,150 — Subordinate debentures 11,583 11,692 — — 11,692 Federal Home Loan Bank advances 62,686 62,572 — — 62,572 Carrying amounts and estimated fair values of financial instruments not reported at fair value at December 31, 2017 were as follows: Carrying Estimated Quoted Significant Significant Financial assets Cash and due from banks $ 20,497 $ 20,497 $ 20,497 $ — $ — Federal funds sold 171 171 — 171 — Loans, net 762,488 762,574 — — 762,574 Mortgage loans held for sale 45,322 46,467 — 46,467 — Accrued interest receivable 5,744 5,744 — 5,744 — Restricted equity securities 7,774 7,774 — 7,774 — Financial liabilities Deposits $ 883,519 $ 882,533 $ — $ — $ 882,533 Accrued interest payable 305 305 — 305 — Federal Home Loan Bank advances 96,747 96,754 — — 96,754 NOTE 5 - FAIR VALUES OF ASSETS AND LIABILITIES (CONTINUED) The methods and assumptions used to estimate fair value are described as follows: Carrying amount is the estimated fair value for cash and cash equivalents, accrued interest receivable and payable, restricted equity securities, federal funds sold or purchased, demand deposits, and variable rate loans or deposits that re-price frequently and fully. For fixed rate loans or deposits and for variable rate loans or deposits with infrequent re-pricing or re-pricing limits, fair value is based on discounted cash flows using current market rates applied to the estimated life and credit risk. Fair value of debt is based on discounted cash flows using current rates for similar financing.

Stock-based Compensation

Stock-based Compensation	9 Months Ended
	Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
STOCK-BASED COMPENSATION	STOCK-BASED COMPENSATION In 2011, the Board of Directors and shareholders of the Company approved the Commerce Union Bancshares, Inc. Stock Option Plan, which was amended and restated in 2015 (as amended, the "2011 Plan"). The 2011 Plan initially provided for the issuance of up to 625,000 options to purchase shares of common stock, and in 2015, the Company's shareholders amended the 2011 Plan to authorize the issuance of up to 1,250,000 stock options. Under the 2011 Plan, stock option awards may be granted in the form of incentive stock options or non-statutory stock options, and are generally exercisable for up to ten years following the date such option awards are granted. On June 18, 2015, the shareholders of the Company approved the Commerce Union Bancshares, Inc. 2015 Equity Incentive Plan, which provides for the issuance of up to 900,000 shares of common stock in the form of stock options, restricted stock grants or grants for performance-based compensation. A summary of the activity in the stock option plans for the nine months ended September 30, 2018 as follows: Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term Aggregate Intrinsic Value Outstanding at January 1, 2018 170,761 $ 14.48 5.73 $ 1,905 Granted 25,500 $ 28.00 9.83 — Exercised (30,001) $ 13.27 2.56 — Forfeited or expired (6,000) $ 18.62 8.44 — Outstanding at September 30, 2018 160,260 $ 16.71 6.30 $ 1,482 Exercisable at September 30, 2018 89,660 $ 13.46 4.63 $ 1,085 Shares Weighted Average Grant-Date Fair Value Non-vested options at January 1, 2018 74,900 $4.14 Granted 25,500 $7.10 Vested (23,800 ) $6.16 Forfeited (6,000 ) $4.94 Non-vested options at September 30, 2018 70,600 $5.30 At September 30, 2018 , the unrecognized future compensation expense to be recognized for stock compensation totals $2,314 .

Regulatory Capital Requirements

Regulatory Capital Requirements	9 Months Ended
	Sep. 30, 2018
Banking and Thrift [Abstract]
REGULATORY CAPITAL REQUIREMENTS	REGULATORY CAPITAL REQUIREMENTS The Company and the Bank are subject to regulatory capital requirements administered by the federal and state 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 judgments by regulators. Failure to meet capital requirements can initiate regulatory action. Management believes as of September 30, 2018 , the Company and the Bank meet all capital adequacy requirements to which they are subject. 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 only 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 September 30, 2018 and December 31, 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 institution’s category. In July 2013, the FDIC approved final rules that substantially amend the regulatory risk-based capital rules applicable to the Company and the Bank. The final rules implement the regulatory capital reforms of the Basel Committee on Banking Supervision reflected in “Basel III: A Global Framework for More Resilient Banks and Banking Systems” (Basel III) and changes required by the Dodd-Frank Act. Under these rules, the leverage and risk-based capital ratios of bank holding companies may not be lower than the leverage and risk-based capital ratios for insured depository institutions. The final rules implementing Basel III became effective on January 1, 2015, and include new minimum risk-based capital and leverage ratios and a new common equity tier 1 ratio. In addition, these rules refine the definition of what constitutes capital for purposes of calculating those ratios, including the definitions of Tier 1 capital and Tier 2 capital. Basel III establishes a “capital conservation buffer” of 2.5% which began phasing in on January 1, 2016, at a rate of 0.625% per year. The buffer becomes fully phased in on January 1, 2019. An institution is subject to limitations on paying dividends, engaging in share repurchases, and paying discretionary bonuses if capital levels fall below minimum levels plus the buffer. NOTE 7 - REGULATORY CAPITAL REQUIREMENTS (CONTINUED) Actual and required capital amounts and ratios are presented below as of September 30, 2018 and December 31, 2017 . Actual Regulatory Capital Minimum Required Capital Including Capital Conservation Buffer To Be Well Capitalized Under Prompt Corrective Action Provisions Amount Ratio Amount Ratio Amount Ratio September 30, 2018 Company Tier I leverage $ 165,163 10.38 % $ 63,647 4.000 % $ 79,558 5.000 % Common equity tier 1 153,580 11.50 % 85,137 6.375 % 86,806 6.500 % Tier I risk-based capital 165,163 12.37 % 105,146 7.875 % 106,815 8.000 % Total risk-based capital 176,286 13.20 % 131,881 9.875 % 133,550 10.000 % Bank Tier I leverage $ 161,381 10.17 % $ 63,473 4.000 % $ 79,342 5.000 % Common equity tier 1 161,381 12.13 % 84,815 6.375 % 86,478 6.500 % Tier I risk-based capital 161,381 12.13 % 104,771 7.875 % 106,434 8.000 % Total risk-based capital 172,504 12.97 % 131,340 9.875 % 133,002 10.000 % December 31, 2017 Company Tier I leverage $ 126,234 11.89 % $ 42,467 4.000 % $ 53,084 5.000 % Common equity tier 1 126,234 13.90 % 52,219 5.750 % 59,030 6.500 % Tier I risk-based capital 126,234 13.90 % 65,841 7.250 % 72,653 8.000 % Total risk-based capital 135,965 14.97 % 84,013 9.250 % 90,825 10.000 % Bank Tier I leverage $ 123,862 11.68 % $ 42,418 4.000 % $ 53,023 5.000 % Common equity tier 1 123,862 13.67 % 52,100 5.750 % 58,896 6.500 % Tier I risk-based capital 123,862 13.67 % 65,691 7.250 % 72,487 8.000 % Total risk-based capital 133,593 14.74 % 83,835 9.250 % 90,633 10.000 %

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
EARNINGS PER SHARE	EARNINGS PER SHARE The following is a summary of the components comprising basic and diluted earnings per common share of stock (EPS): Three Months Ended Nine Months Ended 2018 2017 2018 2017 Basic EPS Computation Net income attributable to common shareholders $ 4,082 $ 1,846 $ 9,962 $ 6,091 Weighted average common shares outstanding 11,406,753 8,174,973 11,378,755 7,878,760 Basic earnings per common share $ 0.36 $ 0.23 $ 0.88 $ 0.77 Diluted EPS Computation Net income attributable to common shareholders $ 4,082 $ 1,846 $ 9,962 $ 6,091 Weighted average common shares outstanding 11,406,753 8,174,973 11,378,755 7,878,760 Dilutive effect of stock options and restricted shares 91,426 105,885 83,944 95,587 Adjusted weighted average common shares outstanding 11,498,179 8,280,858 11,462,699 7,974,347 Diluted earnings per common share $ 0.36 $ 0.22 $ 0.87 $ 0.76

Segment Reporting

Segment Reporting	9 Months Ended
	Sep. 30, 2018
Segment Reporting [Abstract]
SEGMENT REPORTING	SEGMENT REPORTING The Company has two reportable business segments: retail banking and residential mortgage banking. Segment information is derived from the internal reporting system utilized by management. Revenues and expenses for segments reflect those, which can be specifically identified and have been assigned based on internally developed allocation methods. Financial results have been presented, to the extent practicable, as if each segment operated on a stand-alone basis. Retail Banking provides deposit and lending services to consumer and business customers within our primary geographic markets. Our customers are serviced through branch locations, ATMs, online banking, and mobile banking. Residential Mortgage Banking originates traditional first lien residential mortgage loans and first lien home equity lines of credit throughout the United States. The traditional first lien residential mortgage loans are typically underwritten to government agency standards and sold to third party secondary market mortgage investors. The home equity lines of credit are typically underwritten to participating banks or other investor group standards. The following presents summarized results of operations for the Company’s business segments for the periods indicated: Three Months Ended Retail Banking Residential Mortgage Banking Elimination Entries Consolidated Net interest income $ 13,295 $ 171 $ — $ 13,466 Provision for loan losses 322 — — 322 Noninterest income 1,379 1,449 (51 ) 2,777 Noninterest expense (excluding merger expense) 9,614 2,466 — 12,080 Merger expense 82 — — 82 Income tax expense (benefit) 574 (55 ) — 519 Net income (loss) 4,082 (791 ) (51 ) 3,240 Noncontrolling interest in net loss of subsidiary — 791 51 842 Net income attributable to common shareholders $ 4,082 $ — $ — $ 4,082 NOTE 9 - SEGMENT REPORTING (CONTINUED) The following presents summarized results of operations for the Company’s business segments for the periods indicated: Three Months Ended Retail Banking Residential Mortgage Banking Elimination Entries Consolidated Net interest income $ 8,924 $ 172 $ — $ 9,096 Provision for loan losses 540 — — 540 Noninterest income 516 1,584 (13 ) 2,087 Noninterest expense (excluding merger expense) 6,186 1,749 — 7,935 Merger expense 562 — — 562 Income tax expense (benefit) 306 — — 306 Net income (loss) 1,846 7 (13 ) 1,840 Noncontrolling interest in net loss of subsidiary — (7 ) 13 6 Net income attributable to common shareholders $ 1,846 $ — $ — $ 1,846 Nine Months Ended Retail Banking Residential Mortgage Banking Elimination Entries Consolidated Net interest income $ 39,529 $ 723 $ — $ 40,252 Provision for loan losses 759 — — 759 Noninterest income 3,966 4,190 (134 ) 8,022 Noninterest expense (excluding merger expense) 28,454 7,169 — 35,623 Merger expense 2,742 — — 2,742 Income tax expense (benefit) 1,578 (147 ) — 1,431 Net income (loss) 9,962 (2,109 ) (134 ) 7,719 Noncontrolling interest in net loss of subsidiary — 2,109 134 2,243 Net income attributable to common shareholders $ 9,962 $ — $ — $ 9,962 NOTE 9 - SEGMENT REPORTING (CONTINUED) The following presents summarized results of operations for the Company’s business segments for the periods indicated: Nine Months Ended Retail Banking Residential Mortgage Banking Elimination Entries Consolidated Net interest income $ 25,224 $ 346 $ — $ 25,570 Provision for loan losses 1,195 — — 1,195 Noninterest income 1,704 2,851 (98 ) 4,457 Noninterest expense (excluding merger expense) 18,019 4,053 — 22,072 Merger expense 562 — — 562 Income tax expense (benefit) 1,061 (56 ) — 1,005 Net income (loss) 6,091 (800 ) (98 ) 5,193 Noncontrolling interest in net loss of subsidiary — 800 98 898 Net income attributable to common shareholders $ 6,091 $ — $ — $ 6,091

Derivatives

Derivatives	9 Months Ended
	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVES	DERIVATIVES The Company has swap agreements that relate to the purchase of investment grade municipal securities effectively converting the fixed municipal yields to floating rates. These are fair value hedges that are intended to reduce the interest rate risk associated with the underlying hedged items by mitigating the changes in fair value based on fluctuations in interest rates. Additionally, during the nine months ended September 30, 2018 , the Company has entered into swap agreements which hedge Federal Home Loan Bank advances and subordinated debentures that convert the floating rate elements into fixed rates. These cash flow hedges are intended to reduce the interest rate risk associated with the underlying hedged item by mitigating the changes in fair value based on fluctuations in interest rates. At September 30, 2018 , the Company’s hedges are deemed effective and are not expected to have a significant impact on net income over the next twelve months. The total notional amount of swap agreements was $81,505 at September 30, 2018 and $21,505 at December 31, 2017 , respectively. At September 30, 2018 , the contracts had fair values totaling $1,013 recorded in other assets. At December 31, 2017 , the contracts had fair values totaling $155 recorded in other assets and $180 recorded in other liabilities.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2018
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES On December 22, 2017, comprehensive tax reform legislation known as the Tax Cuts and Jobs Act (the “Tax Reform Act”) was signed into law. The Tax Reform Act amends the Internal Revenue Code to reduce U.S. tax rates and modify policies, credits and deductions for individuals and businesses. The Tax Reform Act permanently reduces the U.S. federal corporate income tax rate from a high of 35% to 21% , effective for tax years beginning after 2017. Income tax expense totaled $519 in the third quarter of 2018 as compared to $306 in the third quarter of 2017 and $1,431 and $1,005 for the nine months ended September 30, 2018 and 2017 . The effective tax rate of 14% for the third quarters of 2018 and 2017 , respectively, were favorably impacted by an increase in income from tax-exempt securities, excess tax benefits recognized relating to the stock compensatory plans and the addition of certain state tax credits on interest-free loans. The effective tax rates for the nine months ended September 30, 2018 and 2017 of 16% for each period were similarly impacted. The state tax credits and excess tax benefits recognized relating to stock compensatory plans for 2018 are at lesser level than 2017.

Business Combination

Business Combination	9 Months Ended
	Sep. 30, 2018
Business Combinations [Abstract]
BUSINESS COMBINATION	BUSINESS COMBINATION On January 1, 2018, pursuant to the Agreement and Plan of Merger, dated August 22, 2017, by and among Reliant Bancorp, Community First, Pioneer Merger Sub, Inc., the Bank, and Community First Bank & Trust, Community First merged with and into the Reliant Bancorp. Immediately following the merger, Community First Bank & Trust merged with and into the Bank, with the Bank surviving. Pursuant to the merger agreement, each outstanding share of Community First common stock (except for excluded shares and dissenting shares) was converted into and cancelled in exchange for the right to receive 0.481 shares of Reliant Bancorp common stock, together with cash in lieu of any fractional shares. 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 Community First common stock outstanding as of December 31, 2017 5,025,884 Exchange ratio for Reliant Bancorp, Inc. common stock 0.481 Share conversion 2,417,450 Reliant Bancorp, Inc. common stock shares issued 2,416,444 Reliant Bancorp, Inc. share price at December 29, 2017 $ 25.64 Value of Reliant Bancorp, Inc. common stock shares issued 61,958 Value of fractional shares 25 Estimated fair value of Community First $ 61,983 Allocation of Purchase Price Total consideration above $ 61,983 Fair value of assets acquired and liabilities assumed Cash and cash equivalents (33,128 ) Time deposits in other financial institutions (23,309 ) Investment securities available for sale (69,078 ) Loans, net of unearned income (313,040 ) Mortgage loans held for sale, net (910 ) Accrued interest receivable (1,165 ) Premises and equipment (9,585 ) Restricted equity securities (1,726 ) Cash surrender value of life insurance contracts (10,664 ) Other real estate owned (1,650 ) Deferred tax asset, net (4,885 ) Core deposit intangible (7,888 ) Other assets (1,795 ) Deposits—noninterest-bearing 80,395 Deposits—interest-bearing 352,100 Other borrowings 11,522 Payables and other liabilities 5,061 Net liabilities assumed (net assets acquired) (29,745 ) Goodwill $ 32,238 NOTE 12 - BUSINESS COMBINATION (CONTINUED) During 2018, as part of the system integration of Community First, the Company determined minor adjustments were appropriate to reduce other assets by $93 and increase payables and other liabilities by $85 effective as of the acquisition date. Pro forma data for the nine months ended September 30, 2018 and 2017 in the table below presents information as if the merger occurred at the beginning of each period. Nine Months Ended 2018 2017 Net interest income $ 40,252 $ 38,022 Net income attributable to common shareholders $ 9,962 $ 8,486 Earnings per share - basic $ 0.88 $ 0.83 Earnings per share - diluted $ 0.87 $ 0.82 Supplemental pro forma earnings in the above table for the nine months ended 2018 and 2017 include $2,742 and $562 of nonrecurring costs, respectively.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	9 Months Ended
	Sep. 30, 2018
Accounting Changes and Error Corrections [Abstract]
RECENT ACCOUNTING PRONOUNCEMENTS	RECENT ACCOUNTING PRONOUNCEMENTS Information about certain issued accounting standards updates is presented below. Also refer to Note 1 - Summary of Significant Accounting Policies “Recent Authoritative Accounting Guidance” in our 2017 Form 10-K for additional information related to previously issued accounting standards updates. ASU 2014-09, “ Revenue from Contracts with Customers (Topic 606)” implements a common revenue standard that clarifies the principles for recognizing revenue. The principle element of ASU 2014-09 is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. To achieve this principle, an entity should apply the following steps: (i) identify the contract(s) with a customer, (ii) identify the performance obligations in the contract, (iii) determine the transaction price, (iv) allocate the transaction price to the performance obligations in the contract and (v) recognize revenue when (or as) the entity satisfies a performance obligation. ASU 2014-09 was originally going to be effective for us on January 1, 2017; however, the FASB recently issued ASU 2015-14, “Revenue from Contracts with Customers (Topic 606) - Deferral of the Effective Date" which deferred the effective date of ASU 2014-09 by one year to January 1, 2018. Our revenue is comprised of net interest income on financial assets and financial liabilities, which is explicitly excluded from the scope of ASU 2014-09, and non-interest income. These changes did not have a significant impact on our consolidated financial statements. ASU 2016-02 , “ Leases (Topic 842)” requires lessees to recognize a lease liability, which is a lessee‘s obligation to make lease payments arising from a lease, measured on a discounted basis; and a right-of-use asset, which is an asset that represents the lessee’s right to use, or control the use of, a specified asset for the lease term. ASU 2016-02 does not significantly change lease accounting requirements applicable to lessors. ASU 2016-02 will be effective for the Company on January 1, 2020 and will require transition using a modified retrospective approach, which requires application of the new guidance at the beginning of the earliest comparative period presented in the year of adoption. Management is evaluating the impact of the update on the Company’s consolidated financial statements. ASU 2016-13 , “Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments” requires the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts and requires enhanced disclosures related to the significant estimates and judgments used in estimating credit losses, as well as the credit quality and underwriting standards of an organization’s portfolio. In addition, ASU 2016-13 amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. ASU 2016-13 will be effective beginning on January 1, 2021. Management is evaluating the impact of the pronouncement on the consolidated financial statements. The adoption of the ASU 2016-13 could result in an increase in the allowance for loan losses as a result of changing from an “incurred loss” model, which encompasses allowances for current known and inherent losses within the portfolio, to an “expected loss” model, which encompasses allowances for losses expected to be incurred over the life of the portfolio. Furthermore, ASU 2016-13 will necessitate that we establish an allowance for expected credit losses for certain debt securities and other financial assets. While we are currently unable to reasonably estimate the impact of adopting ASU 2016-13, we expect that the impact of adoption will be significantly influenced by the composition, characteristics and quality of our loan and securities portfolios as well as the prevailing economic conditions and forecasts as of the adoption date. ASU 2017-04, “Intangibles - Goodwill and Other (Topic 350) - Simplifying the Test for Goodwill Impairment.” ASU 2017-04 eliminates Step 2 from the goodwill impairment test which required entities to compute the implied fair value of goodwill. Under ASU 2017-04, an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. ASU 2017-04 will be effective beginning on January 1, 2021, with early adoption permitted for interim or annual impairment tests beginning in 2017. ASU 2017-04 is not expected to have a significant impact on the consolidated financial statements. NOTE 13 - RECENT ACCOUNTING PRONOUNCEMENTS (CONTINUED) ASU 2017-08, " Receivables-Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities. In March 2017, the FASB issued this pronouncement which shortens the amortization period to the earliest call date for certain purchased callable debt securities held at a premium. There is no change for accounting for securities held at a discount. Under the existing guidance, the premium is generally amortized as an adjustment to interest income over the contractual life of the debt security. We adopted this standard on January 1, 2018. The adoption of this guidance did not have a material impact on our consolidated financial statements. 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 the Company on January 1, 2018 and did not have a significant impact on the consolidated financial statements. ASU 2018-02, “Income Statement-Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income” In February 2018, the Financial Accounting Standards Board (“FASB”) issued updated guidance which permits entities to reclassify stranded tax effects in accumulated other comprehensive income to retained earnings as a result of the Tax Cuts and Jobs Act enacted by the U.S. federal government on December 22, 2017. The updated guidance is effective for interim and annual reporting periods beginning after December 15, 2018, with early adoption permitted. The Company elected to adopt this change in accounting principle in the fourth quarter of 2017, which resulted in a decrease to retained earnings and an increase to accumulated other comprehensive income of $245 in 2017 on the Company’s consolidated statement of changes in stockholders’ equity. ASU 2018-05, " Income Taxes (Topic 740) - Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin (SAB) No. 118 ." ASU 2018-05 amends the Accounting Standards Codification to incorporate various SEC paragraphs pursuant to the issuance of SAB 118. SAB 118 addresses the application of generally accepted accounting principles in situations when a registrant does not have the necessary information available, prepared, or analyzed (including computations) in reasonable detail to complete the accounting for certain income tax effects of the Tax Cuts and Jobs Act. See Note 11 - Income Taxes. ASU 2018-13 , “Fair Value Measurement (Topic 820) - Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement.” ASU 2018-13 modifies the disclosure requirements on fair value measurements in Topic 820. The amendments in this update remove disclosures that no longer are considered cost beneficial, modify/clarify the specific requirements of certain disclosures, and add disclosure requirements identified as relevant. ASU 2018-13 will be effective for the Company on January 1, 2021, with early adoption permitted, and is not expected to have a significant impact on our financial statements.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations	Reliant Bancorp, Inc. ("Reliant Bancorp"), through its wholly owned subsidiary bank, Reliant Bank (the "Bank"), provides financial services through its offices in Williamson, Robertson, Davidson, Sumner, Rutherford, Maury, Hickman and Hamilton Counties in Tennessee. Its primary deposit products are checking, savings, and term certificate accounts, and its primary lending products are commercial and residential construction loans, commercial loans, installment loans and lines secured by home equity. Substantially all loans are secured by specific items of collateral including commercial and residential real estate, business assets, and consumer assets. Commercial loans are expected to be repaid from cash flow from operations of businesses.
Basis of Presentation	The accompanying unaudited consolidated financial statements have been prepared in accordance with instructions to Form 10-Q and therefore do not include all information and footnotes necessary for a fair presentation of financial position, results of operations, and cash flows in conformity with U.S. generally accepted accounting principles (U.S. GAAP). All adjustments consisting of normally recurring accruals that, in the opinion of management, are necessary for a fair presentation of the financial position and results of operations for the periods covered by the report have been included. The accompanying unaudited consolidated financial statements should be read in conjunction with Reliant Bancorp, Inc.’s consolidated financial statements and related notes appearing in Reliant Bancorp, Inc.’s Annual Report on Form 10-K for the year ended December 31, 2017 . The consolidated financial statements as of and for the periods presented include the accounts of Reliant Bancorp, the Bank, Community First TRUPS Holding Company, which is wholly owned by Reliant Bancorp (“TRUPS”), and Reliant Mortgage Ventures, LLC ("RMV"), of which the Bank controls 51% of the governance rights. Reliant Bancorp, the Bank, TRUPS, and RMV, are collectively referred to herein as the “Company”. As described in the notes to our annual consolidated financial statements, RMV is considered a variable interest entity for which the Bank is deemed to be the primary beneficiary. All significant intercompany balances and transactions have been eliminated in consolidation. As described in Note 12, Reliant Bancorp, Inc. and Community First, Inc. merged effective January 1, 2018. The accounting and reporting policies of the Company conform to accounting principles generally accepted in the United States of America ("U.S. GAAP") and to general practices in the banking industry.
Use of Estimates	The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions based on available information. These estimates and assumptions affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the 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 determination of the allowance for loan losses, the valuation of other real estate, the valuation of debt and equity securities, the valuation of deferred tax assets and fair values of financial instruments. NOTE 1 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED) Use of Estimates (Continued) The consolidated financial statements as of September 30, 2018 , and for the three and nine months ended September 30, 2018 and 2017 , included herein have not been audited. The accounting and reporting policies of the Company conform to U.S. GAAP and Article 8 of Regulation S-X. Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission, although the Company believes that the disclosures made are adequate to make the information not misleading. The accompanying consolidated financial statements reflect all adjustments, which are, in the opinion of management, necessary to present a fair statement of the results for the interim periods presented. Such adjustments are of a normal recurring nature. The Company evaluates subsequent events through the date of filing. Certain prior period amounts have been reclassified to conform to the current period presentation. The results for the three and nine months ended September 30, 2018 are not necessarily indicative of the results that may be expected for the year ending December 31, 2018 .
Reclassifications	Certain reclassifications were made to the September 30, 2017 financial statement presentation in order to conform to the September 30, 2018 financial statement presentation. Total shareholder's equity and net income are unchanged due to these reclassifications.

Securities (Tables)

Securities (Tables)	9 Months Ended
	Sep. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Available-for-sale Securities	The amortized cost and fair value of available for sale securities and the related gross unrealized gains and losses recognized in accumulated other comprehensive loss at September 30, 2018 and accumulated other comprehensive income at December 31, 2017 were as follows: September 30, 2018 Amortized Gross Gross Estimated U. S. Treasury and other U. S. government agencies $ 573 $ — $ (20 ) $ 553 State and municipal 233,929 320 (6,741 ) 227,508 Corporate bonds 3,130 2 (103 ) 3,029 Mortgage backed securities 29,335 10 (478 ) 28,867 Asset backed securities 30,279 — (708 ) 29,571 Time deposits 3,500 — — 3,500 Total $ 300,746 $ 332 $ (8,050 ) $ 293,028 December 31, 2017 Amortized Gross Gross Estimated U. S. Treasury and other U. S. government agencies $ 586 $ — $ (8 ) $ 578 State and municipal 189,576 3,081 (905 ) 191,752 Corporate bonds 1,500 5 (13 ) 1,492 Mortgage backed securities 6,262 3 (96 ) 6,169 Asset backed securities 16,753 45 (88 ) 16,710 Time deposits 3,500 — — 3,500 Total $ 218,177 $ 3,134 $ (1,110 ) $ 220,201
Investments Classified by Contractual Maturity Date	The fair value of available for sale debt securities at September 30, 2018 by contractual maturity are provided below. Actual maturities may differ from contractual maturities for mortgage and asset backed securities since the underlying asset may be called or prepaid with or without penalty. Securities not due at a single maturity date are shown separately. Amortized Cost Estimated Fair Value Due within one year $ 1,756 $ 1,753 Due in one to five years 7,066 7,019 Due in five to ten years 13,090 12,797 Due after ten years 219,220 213,021 Mortgage backed securities 29,335 28,867 Asset backed securities 30,279 29,571 Total $ 300,746 $ 293,028
Schedule of Unrealized Loss on Investments	The following table shows available for sale securities with unrealized losses and their estimated fair value aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of December 31, 2017 : Less than 12 months 12 months or more Total Estimated Unrealized Estimated Unrealized Estimated Unrealized Description of Securities U. S. Treasury and other U. S. government agencies $ 86 $ 1 $ 491 $ 7 $ 577 $ 8 State and municipal 19,899 128 34,946 777 54,845 905 Corporate bonds — — 487 13 487 13 Mortgage backed securities 2,412 14 3,349 82 5,761 96 Asset backed securities 8,971 73 854 15 9,825 88 Total temporarily impaired $ 31,368 $ 216 $ 40,127 $ 894 $ 71,495 $ 1,110 The following table shows available for sale securities with unrealized losses and their estimated fair value aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of September 30, 2018 : Less than 12 months 12 months or more Total Estimated Fair Value Unrealized Loss Estimated Unrealized Estimated Unrealized Description of Securities U. S. Treasury and other U. S. government agencies $ 72 $ 2 $ 481 $ 18 $ 553 $ 20 State and municipal 157,984 4,455 38,571 2,286 196,555 6,741 Corporate bonds 2,035 95 492 8 2,527 103 Mortgage backed securities 20,440 367 2,136 111 22,576 478 Asset backed securities 27,965 685 1,116 23 29,081 708 Total temporarily impaired $ 208,496 $ 5,604 $ 42,796 $ 2,446 $ 251,292 $ 8,050

Loans and Allowance for Loan _2

Loans and Allowance for Loan Losses (Tables)	9 Months Ended
	Sep. 30, 2018
Receivables [Abstract]
Schedule of Accounts, Notes, Loans and Financing Receivable	Loans at September 30, 2018 and December 31, 2017 were comprised as follows: September 30, 2018 December 31, 2017 Commercial, Industrial and Agricultural $ 209,608 $ 138,706 Real Estate 1-4 Family Residential 228,014 111,932 1-4 Family HELOC 86,778 72,017 Multi-family and Commercial 433,882 261,044 Construction, Land Development and Farmland 199,849 156,452 Consumer 21,533 17,605 Other 14,444 14,694 1,194,108 772,450 Less Deferred loan (fees) costs (21 ) 231 Allowance for possible loan losses 10,698 9,731 Loans, net $ 1,183,431 $ 762,488
Schedule of Credit Losses Related to Financing Receivables, Current and Noncurrent	Activity in the allowance for loan losses by portfolio segment was as follows for the nine months ended September 30, 2018 : Commercial Industrial and Agricultural Multi-family and Commercial Real Estate Construction Land Development and Farmland 1-4 Family Residential Real Estate Beginning balance $ 2,538 $ 3,166 $ 2,434 $ 773 Charge-offs (308 ) (76 ) (144 ) (36 ) Recoveries 530 215 44 11 Provision (734 ) 813 56 573 Ending balance $ 2,026 $ 4,118 $ 2,390 $ 1,321 1-4 Family HELOC Consumer Other Total Beginning balance $ 595 $ 183 $ 42 $ 9,731 Charge-offs (6 ) (24 ) (37 ) (631 ) Recoveries 7 29 3 839 Provision 24 (2 ) 29 759 Ending balance $ 620 $ 186 $ 37 $ 10,698 Activity in the allowance for loan losses by portfolio segment was as follows for the nine months ended September 30, 2017 : Commercial Industrial and Agricultural Multi-family and Commercial Real Estate Construction Land Development and Farmland 1-4 Family Residential Real Estate Beginning balance $ 2,438 $ 2,731 $ 1,786 $ 1,178 Charge-offs (941 ) — — (15 ) Recoveries 306 — 5 — Provision 872 363 356 (296 ) Ending balance $ 2,675 $ 3,094 $ 2,147 $ 867 1-4 Family HELOC Consumer Other Total Beginning balance $ 704 $ 208 $ 37 $ 9,082 Charge-offs — (30 ) — (986 ) Recoveries 19 2 — 332 Provision (110 ) 9 1 1,195 Ending balance $ 613 $ 189 $ 38 $ 9,623
Schedule of Allowance for Credit Losses and Finance Receivables by Portfolio Individually and Collectively Evaluated for Impairment	The allowance for loan losses and the recorded investment in loans by portfolio segment and based on impairment method as of December 31, 2017 was as follows: Commercial Industrial and Agricultural Multi-family and Commercial Real Estate Construction Land Development and Farmland 1-4 Family Residential Real Estate Allowance for loan losses Individually evaluated for impairment $ 606 $ — $ 57 $ — Acquired with credit impairment 2 — 2 — Collectively evaluated for impairment 1,930 3,166 2,375 773 Total $ 2,538 $ 3,166 $ 2,434 $ 773 Loans Individually evaluated for impairment $ 3,649 $ 1,921 $ 3,800 $ 2,114 Acquired with credit impairment 276 1,157 1,436 45 Collectively evaluated for impairment 134,781 257,966 151,216 109,773 Total $ 138,706 $ 261,044 $ 156,452 $ 111,932 1-4 Family HELOC Consumer Other Total Allowance for loan losses Individually evaluated for impairment $ — $ — $ — $ 663 Acquired with credit impairment — — — 4 Collectively evaluated for impairment 595 183 42 9,064 Total $ 595 $ 183 $ 42 $ 9,731 Loans Individually evaluated for impairment $ 90 $ — $ — $ 11,574 Acquired with credit impairment — — — 2,914 Collectively evaluated for impairment 71,927 17,605 14,694 757,962 Total $ 72,017 $ 17,605 $ 14,694 $ 772,450 The allowance for loan losses and the recorded investment in loans by portfolio segment and based on impairment method as of September 30, 2018 was as follows: Commercial Industrial and Agricultural Multi-family and Commercial Real Estate Construction Land Development and Farmland 1-4 Family Residential Real Estate Allowance for loan losses Individually evaluated for impairment $ 334 $ — $ 67 $ 23 Acquired with credit impairment — — — — Collectively evaluated for impairment 1,692 4,118 2,323 1,298 Total $ 2,026 $ 4,118 $ 2,390 $ 1,321 Loans Individually evaluated for impairment $ 1,485 $ 1,173 $ 2,314 $ 2,241 Acquired with credit impairment 40 236 1,762 268 Collectively evaluated for impairment 208,083 432,473 195,773 225,505 Total $ 209,608 $ 433,882 $ 199,849 $ 228,014 1-4 Family HELOC Consumer Other Total Allowance for loan losses Individually evaluated for impairment $ — $ — $ — $ 424 Acquired with credit impairment — — — — Collectively evaluated for impairment 620 186 37 10,274 Total $ 620 $ 186 $ 37 $ 10,698 Loans Individually evaluated for impairment $ 90 $ 12 $ — $ 7,315 Acquired with credit impairment — 11 — 2,317 Collectively evaluated for impairment 86,688 21,510 14,444 1,184,476 Total $ 86,778 $ 21,533 $ 14,444 $ 1,194,108
Schedule of Financing Receivables, Non Accrual Status	Non-accrual loans by class of loan were as follows at September 30, 2018 and December 31, 2017 : September 30, 2018 December 31, 2017 Commercial, Industrial and Agricultural $ 750 $ 2,110 Multi-family and Commercial Real Estate — — Construction, Land Development and Farmland 2,112 2,518 1-4 Family Residential Real Estate 1,317 533 1-4 Family HELOC — — Consumer 56 — Total $ 4,235 $ 5,161
Impaired Financing Receivables	Individually impaired loans by class of loans were as follows at September 30, 2018 : Unpaid Principal Balance Recorded Investment with no Allowance Recorded Recorded Investment with Allowance Recorded Total Recorded Investment Related Allowance Commercial, Industrial and Agricultural $ 1,897 $ 976 $ 549 $ 1,525 $ 334 Multi-family and Commercial Real Estate 1,691 1,409 — 1,409 — Construction, Land Development and Farmland 5,678 3,459 617 4,076 67 1-4 Family Residential Real Estate 3,501 2,377 132 2,509 23 1-4 Family HELOC 90 90 — 90 — Consumer 29 23 — 23 — Total $ 12,886 $ 8,334 $ 1,298 $ 9,632 $ 424 Individually impaired loans by class of loans were as follows at December 31, 2017 : Unpaid Principal Balance Recorded Investment with no Allowance Recorded Recorded Investment with Allowance Recorded Total Recorded Investment Related Allowance Commercial, Industrial and Agricultural $ 4,398 $ 2,959 $ 966 $ 3,925 $ 608 Multi-family and Commercial Real Estate 3,427 3,078 — 3,078 — Construction, Land Development and Farmland 5,317 3,249 1,987 5,236 59 1-4 Family Residential Real Estate 2,857 2,159 — 2,159 — 1-4 Family HELOC 90 90 — 90 — Total $ 16,089 $ 11,535 $ 2,953 $ 14,488 $ 667
Impaired Financing Receivables, Average Recorded Investment	The average balances of impaired loans for the nine months ended September 30, 2018 and 2017 were as follows: 2018 2017 Commercial, Industrial and Agricultural $ 2,661 $ 5,550 Multi-family and Commercial Real Estate 2,610 4,403 Construction, Land Development and Farmland 4,831 4,319 1-4 Family Residential Real Estate 2,708 2,225 1-4 Family HELOC 90 957 Consumer 72 — Total $ 12,972 $ 17,454
Financing Receivable Credit Quality Indicators	Credit quality indicators by class of loan were as follows at September 30, 2018 : Pass Special Mention Substandard Total Commercial, Industrial and Agricultural $ 206,847 $ — $ 2,761 $ 209,608 1-4 Family Residential Real Estate 222,315 1,130 4,569 228,014 1-4 Family HELOC 85,848 — 930 86,778 Multi-family and Commercial Real Estate 430,379 1,566 1,937 433,882 Construction, Land Development and Farmland 195,623 642 3,584 199,849 Consumer 21,272 — 261 21,533 Other 14,444 — — 14,444 Total $ 1,176,728 $ 3,338 $ 14,042 $ 1,194,108 Credit quality indicators by class of loan were as follows at December 31, 2017 : Pass Special Mention Substandard Total Commercial, Industrial and Agricultural $ 135,833 $ 5 $ 2,868 $ 138,706 1-4 Family Residential Real Estate 108,426 1,392 2,114 111,932 1-4 Family HELOC 71,927 — 90 72,017 Multi-family and Commercial Real Estate 259,123 — 1,921 261,044 Construction, Land Development and Farmland 149,886 2,998 3,568 156,452 Consumer 17,605 — — 17,605 Other 14,694 — — 14,694 Total $ 757,494 $ 4,395 $ 10,561 $ 772,450
Past Due Financing Receivables	Past due status by class of loan was as follows at September 30, 2018 : 30-59 Days Past Due 60-89 Days Past Due 90+ Days Past Due Total Past Due Current Total Loans Commercial, Industrial and Agricultural $ 95 $ — $ 573 $ 668 $ 208,940 $ 209,608 1-4 Family Residential Real Estate 572 1,160 129 1,861 226,153 228,014 1-4 Family HELOC 50 — — 50 86,728 86,778 Multi-family and Commercial Real Estate — 245 — 245 433,637 433,882 Construction, Land Development and Farmland — — 989 989 198,860 199,849 Consumer 30 1 40 71 21,462 21,533 Other — — — — 14,444 14,444 Total $ 747 $ 1,406 $ 1,731 $ 3,884 $ 1,190,224 $ 1,194,108 Past due status by class of loan was as follows at December 31, 2017 : 30-59 Days Past Due 60-89 Days Past Due 90+ Days Past Due Total Past Due Current Total Loans Commercial, Industrial and Agricultural $ 7 $ — $ 1,548 $ 1,555 $ 137,151 $ 138,706 1-4 Family Residential Real Estate 617 — — 617 111,315 111,932 1-4 Family HELOC — 7 — 7 72,010 72,017 Multi-family and Commercial Real Estate 1,254 — — 1,254 259,790 261,044 Construction, Land Development and Farmland 265 444 2,073 2,782 153,670 156,452 Consumer 14 — — 14 17,591 17,605 Other — — — — 14,694 14,694 Total $ 2,157 $ 451 $ 3,621 $ 6,229 $ 766,221 $ 772,450
Troubled Debt Restructurings on Financing Receivables	The following table presents loans by class modified as troubled debt restructurings that occurred during the first nine months of 2018 and 2017: Number of Contracts Pre-Modification Outstanding Recorded Investments Post-Modification Outstanding Recorded Investments September 30, 2018 1-4 Family Residential 1 $ 1,254 $ 1,254 Multi-family and Commercial Real Estate 1 661 585 Total 2 $ 1,915 $ 1,839 September 30, 2017 1-4 Family Residential 1 108 108 Commercial, Industrial and Agricultural 1 790 320 Total 2 $ 898 $ 428
Schedule of Loans Acquired with Deteriorated Credit Quality	The outstanding balance and carrying amount of the purchased credit impaired loans was as follows at September 30, 2018 and December 31, 2017 : September 30, 2018 December 31, 2017 Commercial, Industrial and Agricultural $ 63 $ 298 Multi-family and Commercial Real Estate 238 1,217 Construction, Land Development and Farmland 1,969 1,508 1-4 Family Residential Real Estate 330 47 1-4 Family HELOC — — Consumer 17 — Total outstanding balance 2,617 3,070 Less remaining purchase discount 300 156 Allowance for loan losses — 4 Carrying amount, net of allowance $ 2,317 $ 2,910
Schedule of Activity Related to Accretable Yield of Loans Acquired with Evidence of Credit Quality Deterioration Since Origination	Activity related to the accretable portion of the purchase discount on loans acquired with deteriorated credit quality is as follows for the quarters and nine months ended September 30, 2018 and 2017 : 2018 2017 Balance at January 1, $ — $ 87 New accretable loan discount 424 — Loan payoffs (46 ) — Accretion income (38 ) (18 ) Balance at March 31, 340 69 Accretion income (95 ) (17 ) Balance at June 30, 245 52 Loan charge offs (74 ) — Accretion income — (33 ) Balance at September 30, $ 171 $ 19

Fair Values of Assets and Lia_2

Fair Values of Assets and Liabilities (Tables)	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements, Recurring and Nonrecurring	The following table sets forth the Company’s major categories of assets and liabilities measured at fair value on a nonrecurring basis, by level within the fair value hierarchy, as of September 30, 2018 and December 31, 2017 : Fair Value Quoted Significant Significant September 30, 2018 Assets Impaired loans $ 874 $ — $ — $ 874 Mortgage loans held for sale 12,712 — 12,712 — Other real estate owned 1,000 — — 1,000 December 31, 2017 Assets Impaired loans $ 2,286 $ — $ — $ 2,286 The following table sets forth the Company’s major categories of assets and liabilities measured at fair value on a recurring basis, by level within the fair value hierarchy, as of September 30, 2018 and December 31, 2017 : Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) September 30, 2018 Assets U. S. Treasury and other U. S. government agencies $ 553 $ — $ 553 $ — State and municipal 227,508 — 227,508 — Corporate bonds 3,029 — 3,029 — Mortgage backed securities 28,867 — 28,867 — Time deposits 3,500 3,500 — — Interest rate swaps 1,013 — 1,013 — December 31, 2017 Assets U. S. Treasury and other U. S. government agencies $ 578 $ — $ 578 $ — State and municipal 191,752 — 191,752 — Corporate bonds 1,492 — 1,492 — Mortgage backed securities 6,169 — 6,169 — Time deposits 3,500 3,500 — — Interest rate swaps 155 — 155 — Liabilities Interest rate swaps $ 180 $ — $ 180 $ —
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques	The following table presents additional quantitative information about assets measured at fair value on a nonrecurring basis and for which we have utilized Level 3 inputs to determine fair value at September 30, 2018 and December 31, 2017 : Valuation Techniques (1) Significant Unobservable Inputs Range (Weighted Average) Impaired loans Appraisal Estimated costs to sell 10% Mortgage loans held for sale Market bids Not Applicable Not Applicable Other real estate owned Appraisal Estimated costs to sell 10% (1) The fair value is generally determined through independent appraisals of the underlying collateral, which may include Level 3 inputs that are not identifiable, or by using the discounted cash flow method if the loan is not collateral dependent. Estimated cash flows change and appraised values of the assets or collateral underlying the loans will be sensitive to changes.
Fair Value, by Balance Sheet Grouping	Carrying amounts and estimated fair values of financial instruments not reported at fair value at September 30, 2018 were as follows: Carrying Amount Estimated Fair Value Quoted Significant Significant Financial assets Cash and due from banks $ 34,026 $ 34,026 $ 34,026 $ — $ — Federal funds sold 417 417 — 417 — Loans, net 1,183,431 1,172,723 — — 1,172,723 Accrued interest receivable 8,032 8,032 — 8,032 — Restricted equity securities 11,681 11,681 — 11,681 — Financial liabilities Deposits $ 1,395,546 1,388,931 — — 1,388,931 Accrued interest payable 1,150 1,150 — 1,150 — Subordinate debentures 11,583 11,692 — — 11,692 Federal Home Loan Bank advances 62,686 62,572 — — 62,572 Carrying amounts and estimated fair values of financial instruments not reported at fair value at December 31, 2017 were as follows: Carrying Estimated Quoted Significant Significant Financial assets Cash and due from banks $ 20,497 $ 20,497 $ 20,497 $ — $ — Federal funds sold 171 171 — 171 — Loans, net 762,488 762,574 — — 762,574 Mortgage loans held for sale 45,322 46,467 — 46,467 — Accrued interest receivable 5,744 5,744 — 5,744 — Restricted equity securities 7,774 7,774 — 7,774 — Financial liabilities Deposits $ 883,519 $ 882,533 $ — $ — $ 882,533 Accrued interest payable 305 305 — 305 — Federal Home Loan Bank advances 96,747 96,754 — — 96,754

Stock-based Compensation (Table

Stock-based Compensation (Tables)	9 Months Ended
	Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-based Compensation, Stock Options, Activity	A summary of the activity in the stock option plans for the nine months ended September 30, 2018 as follows: Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term Aggregate Intrinsic Value Outstanding at January 1, 2018 170,761 $ 14.48 5.73 $ 1,905 Granted 25,500 $ 28.00 9.83 — Exercised (30,001) $ 13.27 2.56 — Forfeited or expired (6,000) $ 18.62 8.44 — Outstanding at September 30, 2018 160,260 $ 16.71 6.30 $ 1,482 Exercisable at September 30, 2018 89,660 $ 13.46 4.63 $ 1,085
Schedule of Nonvested Share Activity	Shares Weighted Average Grant-Date Fair Value Non-vested options at January 1, 2018 74,900 $4.14 Granted 25,500 $7.10 Vested (23,800 ) $6.16 Forfeited (6,000 ) $4.94 Non-vested options at September 30, 2018 70,600 $5.30

Regulatory Capital Requiremen_2

Regulatory Capital Requirements (Tables)	9 Months Ended
	Sep. 30, 2018
Banking and Thrift [Abstract]
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulation	Actual and required capital amounts and ratios are presented below as of September 30, 2018 and December 31, 2017 . Actual Regulatory Capital Minimum Required Capital Including Capital Conservation Buffer To Be Well Capitalized Under Prompt Corrective Action Provisions Amount Ratio Amount Ratio Amount Ratio September 30, 2018 Company Tier I leverage $ 165,163 10.38 % $ 63,647 4.000 % $ 79,558 5.000 % Common equity tier 1 153,580 11.50 % 85,137 6.375 % 86,806 6.500 % Tier I risk-based capital 165,163 12.37 % 105,146 7.875 % 106,815 8.000 % Total risk-based capital 176,286 13.20 % 131,881 9.875 % 133,550 10.000 % Bank Tier I leverage $ 161,381 10.17 % $ 63,473 4.000 % $ 79,342 5.000 % Common equity tier 1 161,381 12.13 % 84,815 6.375 % 86,478 6.500 % Tier I risk-based capital 161,381 12.13 % 104,771 7.875 % 106,434 8.000 % Total risk-based capital 172,504 12.97 % 131,340 9.875 % 133,002 10.000 % December 31, 2017 Company Tier I leverage $ 126,234 11.89 % $ 42,467 4.000 % $ 53,084 5.000 % Common equity tier 1 126,234 13.90 % 52,219 5.750 % 59,030 6.500 % Tier I risk-based capital 126,234 13.90 % 65,841 7.250 % 72,653 8.000 % Total risk-based capital 135,965 14.97 % 84,013 9.250 % 90,825 10.000 % Bank Tier I leverage $ 123,862 11.68 % $ 42,418 4.000 % $ 53,023 5.000 % Common equity tier 1 123,862 13.67 % 52,100 5.750 % 58,896 6.500 % Tier I risk-based capital 123,862 13.67 % 65,691 7.250 % 72,487 8.000 % Total risk-based capital 133,593 14.74 % 83,835 9.250 % 90,633 10.000 %

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The following is a summary of the components comprising basic and diluted earnings per common share of stock (EPS): Three Months Ended Nine Months Ended 2018 2017 2018 2017 Basic EPS Computation Net income attributable to common shareholders $ 4,082 $ 1,846 $ 9,962 $ 6,091 Weighted average common shares outstanding 11,406,753 8,174,973 11,378,755 7,878,760 Basic earnings per common share $ 0.36 $ 0.23 $ 0.88 $ 0.77 Diluted EPS Computation Net income attributable to common shareholders $ 4,082 $ 1,846 $ 9,962 $ 6,091 Weighted average common shares outstanding 11,406,753 8,174,973 11,378,755 7,878,760 Dilutive effect of stock options and restricted shares 91,426 105,885 83,944 95,587 Adjusted weighted average common shares outstanding 11,498,179 8,280,858 11,462,699 7,974,347 Diluted earnings per common share $ 0.36 $ 0.22 $ 0.87 $ 0.76

Segment Reporting (Tables)

Segment Reporting (Tables)	9 Months Ended
	Sep. 30, 2018
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	The following presents summarized results of operations for the Company’s business segments for the periods indicated: Three Months Ended Retail Banking Residential Mortgage Banking Elimination Entries Consolidated Net interest income $ 13,295 $ 171 $ — $ 13,466 Provision for loan losses 322 — — 322 Noninterest income 1,379 1,449 (51 ) 2,777 Noninterest expense (excluding merger expense) 9,614 2,466 — 12,080 Merger expense 82 — — 82 Income tax expense (benefit) 574 (55 ) — 519 Net income (loss) 4,082 (791 ) (51 ) 3,240 Noncontrolling interest in net loss of subsidiary — 791 51 842 Net income attributable to common shareholders $ 4,082 $ — $ — $ 4,082 The following presents summarized results of operations for the Company’s business segments for the periods indicated: Three Months Ended Retail Banking Residential Mortgage Banking Elimination Entries Consolidated Net interest income $ 8,924 $ 172 $ — $ 9,096 Provision for loan losses 540 — — 540 Noninterest income 516 1,584 (13 ) 2,087 Noninterest expense (excluding merger expense) 6,186 1,749 — 7,935 Merger expense 562 — — 562 Income tax expense (benefit) 306 — — 306 Net income (loss) 1,846 7 (13 ) 1,840 Noncontrolling interest in net loss of subsidiary — (7 ) 13 6 Net income attributable to common shareholders $ 1,846 $ — $ — $ 1,846 Nine Months Ended Retail Banking Residential Mortgage Banking Elimination Entries Consolidated Net interest income $ 39,529 $ 723 $ — $ 40,252 Provision for loan losses 759 — — 759 Noninterest income 3,966 4,190 (134 ) 8,022 Noninterest expense (excluding merger expense) 28,454 7,169 — 35,623 Merger expense 2,742 — — 2,742 Income tax expense (benefit) 1,578 (147 ) — 1,431 Net income (loss) 9,962 (2,109 ) (134 ) 7,719 Noncontrolling interest in net loss of subsidiary — 2,109 134 2,243 Net income attributable to common shareholders $ 9,962 $ — $ — $ 9,962 NOTE 9 - SEGMENT REPORTING (CONTINUED) The following presents summarized results of operations for the Company’s business segments for the periods indicated: Nine Months Ended Retail Banking Residential Mortgage Banking Elimination Entries Consolidated Net interest income $ 25,224 $ 346 $ — $ 25,570 Provision for loan losses 1,195 — — 1,195 Noninterest income 1,704 2,851 (98 ) 4,457 Noninterest expense (excluding merger expense) 18,019 4,053 — 22,072 Merger expense 562 — — 562 Income tax expense (benefit) 1,061 (56 ) — 1,005 Net income (loss) 6,091 (800 ) (98 ) 5,193 Noncontrolling interest in net loss of subsidiary — 800 98 898 Net income attributable to common shareholders $ 6,091 $ — $ — $ 6,091

Business Combination (Tables)

Business Combination (Tables)	9 Months Ended
	Sep. 30, 2018
Business Combinations [Abstract]
Calculation and Allocation of Purchase Price	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 Community First common stock outstanding as of December 31, 2017 5,025,884 Exchange ratio for Reliant Bancorp, Inc. common stock 0.481 Share conversion 2,417,450 Reliant Bancorp, Inc. common stock shares issued 2,416,444 Reliant Bancorp, Inc. share price at December 29, 2017 $ 25.64 Value of Reliant Bancorp, Inc. common stock shares issued 61,958 Value of fractional shares 25 Estimated fair value of Community First $ 61,983 Allocation of Purchase Price Total consideration above $ 61,983 Fair value of assets acquired and liabilities assumed Cash and cash equivalents (33,128 ) Time deposits in other financial institutions (23,309 ) Investment securities available for sale (69,078 ) Loans, net of unearned income (313,040 ) Mortgage loans held for sale, net (910 ) Accrued interest receivable (1,165 ) Premises and equipment (9,585 ) Restricted equity securities (1,726 ) Cash surrender value of life insurance contracts (10,664 ) Other real estate owned (1,650 ) Deferred tax asset, net (4,885 ) Core deposit intangible (7,888 ) Other assets (1,795 ) Deposits—noninterest-bearing 80,395 Deposits—interest-bearing 352,100 Other borrowings 11,522 Payables and other liabilities 5,061 Net liabilities assumed (net assets acquired) (29,745 ) Goodwill $ 32,238
Business Acquisition, Pro Forma Information	Pro forma data for the nine months ended September 30, 2018 and 2017 in the table below presents information as if the merger occurred at the beginning of each period. Nine Months Ended 2018 2017 Net interest income $ 40,252 $ 38,022 Net income attributable to common shareholders $ 9,962 $ 8,486 Earnings per share - basic $ 0.88 $ 0.83 Earnings per share - diluted $ 0.87 $ 0.82

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Details)	Sep. 30, 2018
Reliant Mortgage Ventures, LLC
Noncontrolling Interest [Line Items]
Noncontrolling interest, ownership percentage by parent	51.00%

Securities - Available-for-sale

Securities - Available-for-sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 300,746	$ 218,177
Gross Unrealized Gains	332	3,134
Gross Unrealized Losses	(8,050)	(1,110)
Estimated Fair Value	293,028	220,201
U. S. Treasury and other U. S. government agencies
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	573	586
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(20)	(8)
Estimated Fair Value	553	578
State and municipal
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	233,929	189,576
Gross Unrealized Gains	320	3,081
Gross Unrealized Losses	(6,741)	(905)
Estimated Fair Value	227,508	191,752
Corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	3,130	1,500
Gross Unrealized Gains	2	5
Gross Unrealized Losses	(103)	(13)
Estimated Fair Value	3,029	1,492
Mortgage backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	29,335	6,262
Gross Unrealized Gains	10	3
Gross Unrealized Losses	(478)	(96)
Estimated Fair Value	28,867	6,169
Asset backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	30,279	16,753
Gross Unrealized Gains	0	45
Gross Unrealized Losses	(708)	(88)
Estimated Fair Value	29,571	16,710
Time deposits
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	3,500	3,500
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	$ 3,500	$ 3,500

Securities - Textual (Details)

Securities - Textual (Details) $ in Thousands	Sep. 30, 2018USD ($)security	Dec. 31, 2017USD ($)security
Investments, Debt and Equity Securities [Abstract]
Securities pledged, carrying amount | $	$ 70,833	$ 78,220
Number of securities of single issuer with book value greater than ten percent of stockholders' equity	0	0
Number of securities in unrealized loss position	275	120

Securities - Available-for-sa_2

Securities - Available-for-sale Securities Classified by Contractual Maturity Date (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Amortized Cost
Due within one year	$ 1,756
Due in one to five years	7,066
Due in five to ten years	13,090
Due after ten years	219,220
Amortized Cost	300,746	$ 218,177
Estimated Fair Value
Due within one year	1,753
Due in one to five years	7,019
Due in five to ten years	12,797
Due after ten years	213,021
Estimated Fair Value	293,028	220,201
Mortgage backed securities
Amortized Cost
Asset backed securities	29,335
Amortized Cost	29,335	6,262
Estimated Fair Value
Asset backed securities	28,867
Estimated Fair Value	28,867	6,169
Asset backed securities
Amortized Cost
Asset backed securities	30,279
Amortized Cost	30,279	16,753
Estimated Fair Value
Asset backed securities	29,571
Estimated Fair Value	$ 29,571	$ 16,710

Securities - Schedule of Tempor

Securities - Schedule of Temporary Impairment Losses, Investments (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	$ 208,496	$ 31,368
Less than 12 months, Unrealized Loss	5,604	216
12 months or more, Estimated Fair Value	42,796	40,127
12 months or more, Unrealized Loss	2,446	894
Total, Estimated Fair Value	251,292	71,495
Total, Unrealized Loss	8,050	1,110
U. S. Treasury and other U. S. government agencies
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	72	86
Less than 12 months, Unrealized Loss	2	1
12 months or more, Estimated Fair Value	481	491
12 months or more, Unrealized Loss	18	7
Total, Estimated Fair Value	553	577
Total, Unrealized Loss	20	8
State and municipal
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	157,984	19,899
Less than 12 months, Unrealized Loss	4,455	128
12 months or more, Estimated Fair Value	38,571	34,946
12 months or more, Unrealized Loss	2,286	777
Total, Estimated Fair Value	196,555	54,845
Total, Unrealized Loss	6,741	905
Corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	2,035	0
Less than 12 months, Unrealized Loss	95	0
12 months or more, Estimated Fair Value	492	487
12 months or more, Unrealized Loss	8	13
Total, Estimated Fair Value	2,527	487
Total, Unrealized Loss	103	13
Mortgage backed securities
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	20,440	2,412
Less than 12 months, Unrealized Loss	367	14
12 months or more, Estimated Fair Value	2,136	3,349
12 months or more, Unrealized Loss	111	82
Total, Estimated Fair Value	22,576	5,761
Total, Unrealized Loss	478	96
Asset backed securities
Schedule of Available-for-sale Securities [Line Items]
Less than 12 months, Estimated Fair Value	27,965	8,971
Less than 12 months, Unrealized Loss	685	73
12 months or more, Estimated Fair Value	1,116	854
12 months or more, Unrealized Loss	23	15
Total, Estimated Fair Value	29,081	9,825
Total, Unrealized Loss	$ 708	$ 88

Loans and Allowance for Loan _3

Loans and Allowance for Loan Losses - Schedule of Loans and Financial Receivables (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2016
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 1,194,108	$ 772,450
Deferred loan (fees) costs	(21)	231
Allowance for possible loan losses	10,698	9,731	$ 9,623	$ 9,082
Loans, net	1,183,431	762,488
Commercial, Industrial and Agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	209,608	138,706
Allowance for possible loan losses	2,026	2,538	2,675	2,438
Real Estate | 1-4 Family Residential
Loans and Leases Receivable Disclosure [Line Items]
Loans	228,014	111,932
Allowance for possible loan losses	1,321	773	867	1,178
Real Estate | 1-4 Family HELOC
Loans and Leases Receivable Disclosure [Line Items]
Loans	86,778	72,017
Allowance for possible loan losses	620	595	613	704
Real Estate | Multi-family and Commercial
Loans and Leases Receivable Disclosure [Line Items]
Loans	433,882	261,044
Allowance for possible loan losses	4,118	3,166	3,094	2,731
Real Estate | Construction, Land Development and Farmland
Loans and Leases Receivable Disclosure [Line Items]
Loans	199,849	156,452
Allowance for possible loan losses	2,390	2,434	2,147	1,786
Consumer
Loans and Leases Receivable Disclosure [Line Items]
Loans	21,533	17,605
Allowance for possible loan losses	186	183	189	208
Other
Loans and Leases Receivable Disclosure [Line Items]
Loans	14,444	14,694
Allowance for possible loan losses	$ 37	$ 42	$ 38	$ 37

Loans and Allowance for Loan _4

Loans and Allowance for Loan Losses - Schedule of Allowances for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			$ 9,731	$ 9,082
Charge-offs			(631)	(986)
Recoveries			839	332
Provision	$ 322	$ 540	759	1,195
Ending balance	10,698	9,623	10,698	9,623
Commercial, Industrial and Agricultural
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			2,538	2,438
Charge-offs			(308)	(941)
Recoveries			530	306
Provision			(734)	872
Ending balance	2,026	2,675	2,026	2,675
Real Estate | Multi-family and Commercial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			3,166	2,731
Charge-offs			(76)	0
Recoveries			215	0
Provision			813	363
Ending balance	4,118	3,094	4,118	3,094
Real Estate | Construction, Land Development and Farmland
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			2,434	1,786
Charge-offs			(144)	0
Recoveries			44	5
Provision			56	356
Ending balance	2,390	2,147	2,390	2,147
Real Estate | 1-4 Family Residential
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			773	1,178
Charge-offs			(36)	(15)
Recoveries			11	0
Provision			573	(296)
Ending balance	1,321	867	1,321	867
Real Estate | 1-4 Family HELOC
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			595	704
Charge-offs			(6)	0
Recoveries			7	19
Provision			24	(110)
Ending balance	620	613	620	613
Consumer
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			183	208
Charge-offs			(24)	(30)
Recoveries			29	2
Provision			(2)	9
Ending balance	186	189	186	189
Other
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			42	37
Charge-offs			(37)	0
Recoveries			3	0
Provision			29	1
Ending balance	$ 37	$ 38	$ 37	$ 38

Loans and Allowance for Loan _5

Loans and Allowance for Loan Losses - Allowance for Loan Losses and Recorded Investment by Portfolio Segment (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2016
Allowance for loan losses
Individually evaluated for impairment	$ 424	$ 663
Acquired with credit impairment	0	4
Collectively evaluated for impairment	10,274	9,064
Total	10,698	9,731	$ 9,623	$ 9,082
Loans
Individually evaluated for impairment	7,315	11,574
Acquired with credit impairment	2,317	2,914
Collectively evaluated for impairment	1,184,476	757,962
Total	1,194,108	772,450
Commercial, Industrial and Agricultural
Allowance for loan losses
Individually evaluated for impairment	334	606
Acquired with credit impairment	0	2
Collectively evaluated for impairment	1,692	1,930
Total	2,026	2,538	2,675	2,438
Loans
Individually evaluated for impairment	1,485	3,649
Acquired with credit impairment	40	276
Collectively evaluated for impairment	208,083	134,781
Total	209,608	138,706
Real Estate | Multi-family and Commercial
Allowance for loan losses
Individually evaluated for impairment	0	0
Acquired with credit impairment	0	0
Collectively evaluated for impairment	4,118	3,166
Total	4,118	3,166	3,094	2,731
Loans
Individually evaluated for impairment	1,173	1,921
Acquired with credit impairment	236	1,157
Collectively evaluated for impairment	432,473	257,966
Total	433,882	261,044
Real Estate | Construction, Land Development and Farmland
Allowance for loan losses
Individually evaluated for impairment	67	57
Acquired with credit impairment	0	2
Collectively evaluated for impairment	2,323	2,375
Total	2,390	2,434	2,147	1,786
Loans
Individually evaluated for impairment	2,314	3,800
Acquired with credit impairment	1,762	1,436
Collectively evaluated for impairment	195,773	151,216
Total	199,849	156,452
Real Estate | 1-4 Family Residential
Allowance for loan losses
Individually evaluated for impairment	23	0
Acquired with credit impairment	0	0
Collectively evaluated for impairment	1,298	773
Total	1,321	773	867	1,178
Loans
Individually evaluated for impairment	2,241	2,114
Acquired with credit impairment	268	45
Collectively evaluated for impairment	225,505	109,773
Total	228,014	111,932
Real Estate | 1-4 Family HELOC
Allowance for loan losses
Individually evaluated for impairment	0	0
Acquired with credit impairment	0	0
Collectively evaluated for impairment	620	595
Total	620	595	613	704
Loans
Individually evaluated for impairment	90	90
Acquired with credit impairment	0	0
Collectively evaluated for impairment	86,688	71,927
Total	86,778	72,017
Consumer
Allowance for loan losses
Individually evaluated for impairment	0	0
Acquired with credit impairment	0	0
Collectively evaluated for impairment	186	183
Total	186	183	189	208
Loans
Individually evaluated for impairment	12	0
Acquired with credit impairment	11	0
Collectively evaluated for impairment	21,510	17,605
Total	21,533	17,605
Other
Allowance for loan losses
Individually evaluated for impairment	0	0
Acquired with credit impairment	0	0
Collectively evaluated for impairment	37	42
Total	37	42	$ 38	$ 37
Loans
Individually evaluated for impairment	0	0
Acquired with credit impairment	0	0
Collectively evaluated for impairment	14,444	14,694
Total	$ 14,444	$ 14,694

Loans and Allowance for Loan _6

Loans and Allowance for Loan Losses - Textual (Details)	3 Months Ended	9 Months Ended
	Sep. 30, 2018USD ($)	Sep. 30, 2018USD ($)contract	Sep. 30, 2017USD ($)contract	Dec. 31, 2017USD ($)
Loans and Leases Receivable Disclosure [Line Items]
Non-accrual loans	$ 4,235,000	$ 4,235,000		$ 5,161,000
Recorded investment, 90 days past due and still accruing	40,000	40,000		0
Troubled debt restructuring, write-down		$ 76,000	$ 470,000
Number of restructured loans | contract		5
Number of contracts remaining | contract		2	2
Post-modification outstanding recorded investments		$ 1,839,000	$ 428,000
Performing Financial Instruments
Loans and Leases Receivable Disclosure [Line Items]
Non-accrual loans	2,492,000	2,492,000		1,096,000
Consumer
Loans and Leases Receivable Disclosure [Line Items]
Non-accrual loans	56,000	56,000		0
Multi-family and Commercial | Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Non-accrual loans	0	$ 0		0
Number of contracts remaining | contract		1
Post-modification outstanding recorded investments		$ 585,000
1-4 Family Residential | Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Non-accrual loans	1,317,000	$ 1,317,000		$ 533,000
Number of contracts remaining | contract		1	1
Post-modification outstanding recorded investments		$ 1,254,000	$ 108,000
Proceeds from collection of finance receivables	$ 1,254,000
Minimum | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Repayment period		1 year
Minimum | Multi-family and Commercial | Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Percentage of loans in repayment	50.00%	50.00%
Minimum | 1-4 Family Residential | Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Loan facility, amortization period		15 years
Loans commitment, maturity period		5 years
Maximum | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Repayment period		5 years
Maximum | 1-4 Family Residential | Real Estate
Loans and Leases Receivable Disclosure [Line Items]
Loan facility, amortization period		30 years
Loans commitment, maturity period		15 years

Loans and Allowance for Loan _7

Loans and Allowance for Loan Losses - Summary of Non-accrual Loans by Class of Loan (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Loans and Leases Receivable Disclosure [Line Items]
Non-accrual loans	$ 4,235	$ 5,161
Commercial, Industrial and Agricultural
Loans and Leases Receivable Disclosure [Line Items]
Non-accrual loans	750	2,110
Real Estate | Multi-family and Commercial
Loans and Leases Receivable Disclosure [Line Items]
Non-accrual loans	0	0
Real Estate | Construction, Land Development and Farmland
Loans and Leases Receivable Disclosure [Line Items]
Non-accrual loans	2,112	2,518
Real Estate | 1-4 Family Residential
Loans and Leases Receivable Disclosure [Line Items]
Non-accrual loans	1,317	533
Real Estate | 1-4 Family HELOC
Loans and Leases Receivable Disclosure [Line Items]
Non-accrual loans	0	0
Consumer
Loans and Leases Receivable Disclosure [Line Items]
Non-accrual loans	$ 56	$ 0

Loans and Allowance for Loan _8

Loans and Allowance for Loan Losses - Summary of Individually Impaired Loans by Class of Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Loans and Leases Receivable Disclosure [Line Items]
Unpaid Principal Balance	$ 12,886	$ 16,089
Recorded Investment with no Allowance Recorded	8,334	11,535
Recorded Investment with Allowance Recorded	1,298	2,953
Total Recorded Investment	9,632	14,488
Related Allowance	424	667
Commercial, Industrial and Agricultural
Loans and Leases Receivable Disclosure [Line Items]
Unpaid Principal Balance	1,897	4,398
Recorded Investment with no Allowance Recorded	976	2,959
Recorded Investment with Allowance Recorded	549	966
Total Recorded Investment	1,525	3,925
Related Allowance	334	608
Real Estate | Multi-family and Commercial
Loans and Leases Receivable Disclosure [Line Items]
Unpaid Principal Balance	1,691	3,427
Recorded Investment with no Allowance Recorded	1,409	3,078
Recorded Investment with Allowance Recorded	0	0
Total Recorded Investment	1,409	3,078
Related Allowance	0	0
Real Estate | Construction, Land Development and Farmland
Loans and Leases Receivable Disclosure [Line Items]
Unpaid Principal Balance	5,678	5,317
Recorded Investment with no Allowance Recorded	3,459	3,249
Recorded Investment with Allowance Recorded	617	1,987
Total Recorded Investment	4,076	5,236
Related Allowance	67	59
Real Estate | 1-4 Family Residential
Loans and Leases Receivable Disclosure [Line Items]
Unpaid Principal Balance	3,501	2,857
Recorded Investment with no Allowance Recorded	2,377	2,159
Recorded Investment with Allowance Recorded	132	0
Total Recorded Investment	2,509	2,159
Related Allowance	23	0
Real Estate | 1-4 Family HELOC
Loans and Leases Receivable Disclosure [Line Items]
Unpaid Principal Balance	90	90
Recorded Investment with no Allowance Recorded	90	90
Recorded Investment with Allowance Recorded	0	0
Total Recorded Investment	90	90
Related Allowance	0	$ 0
Consumer
Loans and Leases Receivable Disclosure [Line Items]
Unpaid Principal Balance	29
Recorded Investment with no Allowance Recorded	23
Recorded Investment with Allowance Recorded	0
Total Recorded Investment	23
Related Allowance	$ 0

Loans and Allowance for Loan _9

Loans and Allowance for Loan Losses - Summary of Average Recorded Investment in Impaired Loans (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Loans and Leases Receivable Disclosure [Line Items]
Average balance of impaired loans	$ 12,972	$ 17,454
Commercial, Industrial and Agricultural
Loans and Leases Receivable Disclosure [Line Items]
Average balance of impaired loans	2,661	5,550
Real Estate | Multi-family and Commercial
Loans and Leases Receivable Disclosure [Line Items]
Average balance of impaired loans	2,610	4,403
Real Estate | Construction, Land Development and Farmland
Loans and Leases Receivable Disclosure [Line Items]
Average balance of impaired loans	4,831	4,319
Real Estate | 1-4 Family Residential
Loans and Leases Receivable Disclosure [Line Items]
Average balance of impaired loans	2,708	2,225
Real Estate | 1-4 Family HELOC
Loans and Leases Receivable Disclosure [Line Items]
Average balance of impaired loans	90	957
Consumer
Loans and Leases Receivable Disclosure [Line Items]
Average balance of impaired loans	$ 72	$ 0

Loans and Allowance for Loan_10

Loans and Allowance for Loan Losses - Summary of Credit Quality Indicators by Class of Loan (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 1,194,108	$ 772,450
Pass
Loans and Leases Receivable Disclosure [Line Items]
Loans	1,176,728	757,494
Special Mention
Loans and Leases Receivable Disclosure [Line Items]
Loans	3,338	4,395
Substandard
Loans and Leases Receivable Disclosure [Line Items]
Loans	14,042	10,561
Commercial, Industrial and Agricultural
Loans and Leases Receivable Disclosure [Line Items]
Loans	209,608	138,706
Commercial, Industrial and Agricultural | Pass
Loans and Leases Receivable Disclosure [Line Items]
Loans	206,847	135,833
Commercial, Industrial and Agricultural | Special Mention
Loans and Leases Receivable Disclosure [Line Items]
Loans	0	5
Commercial, Industrial and Agricultural | Substandard
Loans and Leases Receivable Disclosure [Line Items]
Loans	2,761	2,868
Real Estate | 1-4 Family Residential
Loans and Leases Receivable Disclosure [Line Items]
Loans	228,014	111,932
Real Estate | 1-4 Family Residential | Pass
Loans and Leases Receivable Disclosure [Line Items]
Loans	222,315	108,426
Real Estate | 1-4 Family Residential | Special Mention
Loans and Leases Receivable Disclosure [Line Items]
Loans	1,130	1,392
Real Estate | 1-4 Family Residential | Substandard
Loans and Leases Receivable Disclosure [Line Items]
Loans	4,569	2,114
Real Estate | 1-4 Family HELOC
Loans and Leases Receivable Disclosure [Line Items]
Loans	86,778	72,017
Real Estate | 1-4 Family HELOC | Pass
Loans and Leases Receivable Disclosure [Line Items]
Loans	85,848	71,927
Real Estate | 1-4 Family HELOC | Special Mention
Loans and Leases Receivable Disclosure [Line Items]
Loans	0	0
Real Estate | 1-4 Family HELOC | Substandard
Loans and Leases Receivable Disclosure [Line Items]
Loans	930	90
Real Estate | Multi-family and Commercial
Loans and Leases Receivable Disclosure [Line Items]
Loans	433,882	261,044
Real Estate | Multi-family and Commercial | Pass
Loans and Leases Receivable Disclosure [Line Items]
Loans	430,379	259,123
Real Estate | Multi-family and Commercial | Special Mention
Loans and Leases Receivable Disclosure [Line Items]
Loans	1,566	0
Real Estate | Multi-family and Commercial | Substandard
Loans and Leases Receivable Disclosure [Line Items]
Loans	1,937	1,921
Real Estate | Construction, Land Development and Farmland
Loans and Leases Receivable Disclosure [Line Items]
Loans	199,849	156,452
Real Estate | Construction, Land Development and Farmland | Pass
Loans and Leases Receivable Disclosure [Line Items]
Loans	195,623	149,886
Real Estate | Construction, Land Development and Farmland | Special Mention
Loans and Leases Receivable Disclosure [Line Items]
Loans	642	2,998
Real Estate | Construction, Land Development and Farmland | Substandard
Loans and Leases Receivable Disclosure [Line Items]
Loans	3,584	3,568
Consumer
Loans and Leases Receivable Disclosure [Line Items]
Loans	21,533	17,605
Consumer | Pass
Loans and Leases Receivable Disclosure [Line Items]
Loans	21,272	17,605
Consumer | Special Mention
Loans and Leases Receivable Disclosure [Line Items]
Loans	0	0
Consumer | Substandard
Loans and Leases Receivable Disclosure [Line Items]
Loans	261	0
Other
Loans and Leases Receivable Disclosure [Line Items]
Loans	14,444	14,694
Other | Pass
Loans and Leases Receivable Disclosure [Line Items]
Loans	14,444	14,694
Other | Special Mention
Loans and Leases Receivable Disclosure [Line Items]
Loans	0	0
Other | Substandard
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 0	$ 0

Loans and Allowance for Loan_11

Loans and Allowance for Loan Losses - Summary of Past Due (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Loans and Leases Receivable Disclosure [Line Items]
Past due	$ 3,884	$ 6,229
Current	1,190,224	766,221
Total	1,194,108	772,450
Commercial, Industrial and Agricultural
Loans and Leases Receivable Disclosure [Line Items]
Past due	668	1,555
Current	208,940	137,151
Total	209,608	138,706
Real Estate | 1-4 Family Residential
Loans and Leases Receivable Disclosure [Line Items]
Past due	1,861	617
Current	226,153	111,315
Total	228,014	111,932
Real Estate | 1-4 Family HELOC
Loans and Leases Receivable Disclosure [Line Items]
Past due	50	7
Current	86,728	72,010
Total	86,778	72,017
Real Estate | Multi-family and Commercial
Loans and Leases Receivable Disclosure [Line Items]
Past due	245	1,254
Current	433,637	259,790
Total	433,882	261,044
Real Estate | Construction, Land Development and Farmland
Loans and Leases Receivable Disclosure [Line Items]
Past due	989	2,782
Current	198,860	153,670
Total	199,849	156,452
Consumer
Loans and Leases Receivable Disclosure [Line Items]
Past due	71	14
Current	21,462	17,591
Total	21,533	17,605
Other
Loans and Leases Receivable Disclosure [Line Items]
Past due	0	0
Current	14,444	14,694
Total	14,444	14,694
30-59 Days Past Due
Loans and Leases Receivable Disclosure [Line Items]
Past due	747	2,157
30-59 Days Past Due | Commercial, Industrial and Agricultural
Loans and Leases Receivable Disclosure [Line Items]
Past due	95	7
30-59 Days Past Due | Real Estate | 1-4 Family Residential
Loans and Leases Receivable Disclosure [Line Items]
Past due	572	617
30-59 Days Past Due | Real Estate | 1-4 Family HELOC
Loans and Leases Receivable Disclosure [Line Items]
Past due	50	0
30-59 Days Past Due | Real Estate | Multi-family and Commercial
Loans and Leases Receivable Disclosure [Line Items]
Past due	0	1,254
30-59 Days Past Due | Real Estate | Construction, Land Development and Farmland
Loans and Leases Receivable Disclosure [Line Items]
Past due	0	265
30-59 Days Past Due | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Past due	30	14
30-59 Days Past Due | Other
Loans and Leases Receivable Disclosure [Line Items]
Past due	0	0
60-89 Days Past Due
Loans and Leases Receivable Disclosure [Line Items]
Past due	1,406	451
60-89 Days Past Due | Commercial, Industrial and Agricultural
Loans and Leases Receivable Disclosure [Line Items]
Past due	0	0
60-89 Days Past Due | Real Estate | 1-4 Family Residential
Loans and Leases Receivable Disclosure [Line Items]
Past due	1,160	0
60-89 Days Past Due | Real Estate | 1-4 Family HELOC
Loans and Leases Receivable Disclosure [Line Items]
Past due	0	7
60-89 Days Past Due | Real Estate | Multi-family and Commercial
Loans and Leases Receivable Disclosure [Line Items]
Past due	245	0
60-89 Days Past Due | Real Estate | Construction, Land Development and Farmland
Loans and Leases Receivable Disclosure [Line Items]
Past due	0	444
60-89 Days Past Due | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Past due	1	0
60-89 Days Past Due | Other
Loans and Leases Receivable Disclosure [Line Items]
Past due	0	0
Greater Than 90 Days Past Due
Loans and Leases Receivable Disclosure [Line Items]
Past due	1,731	3,621
Greater Than 90 Days Past Due | Commercial, Industrial and Agricultural
Loans and Leases Receivable Disclosure [Line Items]
Past due	573	1,548
Greater Than 90 Days Past Due | Real Estate | 1-4 Family Residential
Loans and Leases Receivable Disclosure [Line Items]
Past due	129	0
Greater Than 90 Days Past Due | Real Estate | 1-4 Family HELOC
Loans and Leases Receivable Disclosure [Line Items]
Past due	0	0
Greater Than 90 Days Past Due | Real Estate | Multi-family and Commercial
Loans and Leases Receivable Disclosure [Line Items]
Past due	0	0
Greater Than 90 Days Past Due | Real Estate | Construction, Land Development and Farmland
Loans and Leases Receivable Disclosure [Line Items]
Past due	989	2,073
Greater Than 90 Days Past Due | Consumer
Loans and Leases Receivable Disclosure [Line Items]
Past due	40	0
Greater Than 90 Days Past Due | Other
Loans and Leases Receivable Disclosure [Line Items]
Past due	$ 0	$ 0

Loans and Allowance for Loan_12

Loans and Allowance for Loan Losses - Troubled Debt Restructurings (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2018USD ($)contract	Sep. 30, 2017USD ($)contract
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	2	2
Pre-Modification Outstanding Recorded Investments	$ 1,915	$ 898
Post-Modification Outstanding Recorded Investments	$ 1,839	$ 428
Real Estate | 1-4 Family Residential
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	1	1
Pre-Modification Outstanding Recorded Investments	$ 1,254	$ 108
Post-Modification Outstanding Recorded Investments	$ 1,254	$ 108
Real Estate | Multi-family and Commercial
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	1
Pre-Modification Outstanding Recorded Investments	$ 661
Post-Modification Outstanding Recorded Investments	$ 585
Commercial, Industrial and Agricultural
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract		1
Pre-Modification Outstanding Recorded Investments		$ 790
Post-Modification Outstanding Recorded Investments		$ 320

Loans and Allowance for Loan_13

Loans and Allowance for Loan Losses - Summary of Carrying Amount of Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Loans and Leases Receivable Disclosure [Line Items]
Total outstanding balance	$ 2,617	$ 3,070
Less remaining purchase discount	300	156
Allowance for loan losses	0	4
Carrying amount, net of allowance	2,317	2,910
Commercial, Industrial and Agricultural
Loans and Leases Receivable Disclosure [Line Items]
Total outstanding balance	63	298
Real Estate | Multi-family and Commercial
Loans and Leases Receivable Disclosure [Line Items]
Total outstanding balance	238	1,217
Real Estate | Construction, Land Development and Farmland
Loans and Leases Receivable Disclosure [Line Items]
Total outstanding balance	1,969	1,508
Real Estate | 1-4 Family Residential
Loans and Leases Receivable Disclosure [Line Items]
Total outstanding balance	330	47
Real Estate | 1-4 Family HELOC
Loans and Leases Receivable Disclosure [Line Items]
Total outstanding balance	0	0
Consumer
Loans and Leases Receivable Disclosure [Line Items]
Total outstanding balance	$ 17	$ 0

Loans and Allowance for Loan_14

Loans and Allowance for Loan Losses - Activity Related to Accretable Portion of Loans Acquired (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance	$ 245	$ 340	$ 0	$ 52	$ 69	$ 87
New accretable loan discount			424			0
Loan payoffs	(74)		(46)	0		0
Accretion income	0	(95)	(38)	(33)	(17)	(18)
Balance	$ 171	$ 245	$ 340	$ 19	$ 52	$ 69

Other Real Estate (Details)

Other Real Estate (Details) $ in Thousands	Jan. 01, 2018USD ($)parcel	Sep. 30, 2018USD ($)loan	Sep. 30, 2017USD ($)	Sep. 30, 2018USD ($)propertyloan	Sep. 30, 2017USD ($)
Business Acquisition [Line Items]
Gain on sale of other real estate		$ 150	$ 1	$ 259	$ 26
Number of properties transferred to other real estate | property				2
Property loans transferred to other real estate				$ 1,060	$ 0
Number of mortgage loans in process of foreclosure | loan		3		3
Mortgage loans in process of foreclosure, amount		$ 1,526		$ 1,526
Community First
Business Acquisition [Line Items]
Real estate parcels acquired | parcel	3
Other real estate owned, acquired	$ 1,650

Fair Values of Assets and Lia_3

Fair Values of Assets and Liabilities - Schedule of Fair Value of Assets and Liabilities Measured on Recurring and Non-recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Recurring | Interest rate swaps | Derivative financial instruments, liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities		$ 180
Recurring | U. S. Treasury and other U. S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	$ 553	578
Recurring | State and municipal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	227,508	191,752
Recurring | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	3,029	1,492
Recurring | Mortgage backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	28,867	6,169
Recurring | Time deposits
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	3,500	3,500
Recurring | Derivative financial instruments, assets | Interest rate swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	1,013	155
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Interest rate swaps | Derivative financial instruments, liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities		0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | U. S. Treasury and other U. S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	0	0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | State and municipal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	0	0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	0	0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Mortgage backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	0	0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Time deposits
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	3,500	3,500
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Derivative financial instruments, assets | Interest rate swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	0	0
Recurring | Significant Other Observable Inputs (Level 2) | Interest rate swaps | Derivative financial instruments, liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities		180
Recurring | Significant Other Observable Inputs (Level 2) | U. S. Treasury and other U. S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	553	578
Recurring | Significant Other Observable Inputs (Level 2) | State and municipal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	227,508	191,752
Recurring | Significant Other Observable Inputs (Level 2) | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	3,029	1,492
Recurring | Significant Other Observable Inputs (Level 2) | Mortgage backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	28,867	6,169
Recurring | Significant Other Observable Inputs (Level 2) | Time deposits
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	0	0
Recurring | Significant Other Observable Inputs (Level 2) | Derivative financial instruments, assets | Interest rate swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	1,013	155
Recurring | Significant Unobservable Inputs (Level 3) | Interest rate swaps | Derivative financial instruments, liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Liabilities		0
Recurring | Significant Unobservable Inputs (Level 3) | U. S. Treasury and other U. S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	0	0
Recurring | Significant Unobservable Inputs (Level 3) | State and municipal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	0	0
Recurring | Significant Unobservable Inputs (Level 3) | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	0	0
Recurring | Significant Unobservable Inputs (Level 3) | Mortgage backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	0	0
Recurring | Significant Unobservable Inputs (Level 3) | Time deposits
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	0	0
Recurring | Significant Unobservable Inputs (Level 3) | Derivative financial instruments, assets | Interest rate swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	0	0
Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	874	2,286
Mortgage loans held for sale	12,712
Other real estate owned	1,000
Nonrecurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Mortgage loans held for sale	0
Other real estate owned	0
Nonrecurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Mortgage loans held for sale	12,712
Other real estate owned	0
Nonrecurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	874	$ 2,286
Mortgage loans held for sale	0
Other real estate owned	$ 1,000

Fair Values of Assets and Lia_4

Fair Values of Assets and Liabilities - Summary of Quantitative Information of Assets Measured at Fair Value on Nonrecurring Basis by Utilized Level 3 Inputs (Details) - Significant Unobservable Inputs (Level 3)	9 Months Ended
	Sep. 30, 2018
Impaired loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Valuation Techniques	Appraisal
Significant Unobservable Inputs	Estimated costs to sell
Range (Weighted Average)	10.00%
Mortgage loans held for sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Valuation Techniques	Market bids
Other real estate owned
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Valuation Techniques	Appraisal
Significant Unobservable Inputs	Estimated costs to sell
Range (Weighted Average)	10.00%

Fair Values of Assets and Lia_5

Fair Values of Assets and Liabilities - Estimated Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Carrying Amount
Financial assets
Cash and due from banks	$ 34,026	$ 20,497
Federal funds sold	417	171
Loans, net	1,183,431	762,488
Mortgage loans held for sale		45,322
Accrued interest receivable	8,032	5,744
Restricted equity securities	11,681	7,774
Financial liabilities
Deposits	1,395,546	883,519
Accrued interest payable	1,150	305
Subordinate debentures	11,583
Federal Home Loan Bank advances	62,686	96,747
Estimated Fair Value
Financial assets
Cash and due from banks	34,026	20,497
Federal funds sold	417	171
Loans, net	1,172,723	762,574
Mortgage loans held for sale		46,467
Accrued interest receivable	8,032	5,744
Restricted equity securities	11,681	7,774
Financial liabilities
Deposits	1,388,931	882,533
Accrued interest payable	1,150	305
Subordinate debentures	11,692
Federal Home Loan Bank advances	62,572	96,754
Estimated Fair Value | Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets
Cash and due from banks	34,026	20,497
Federal funds sold	0	0
Loans, net	0	0
Mortgage loans held for sale		0
Accrued interest receivable	0	0
Restricted equity securities	0	0
Financial liabilities
Deposits	0	0
Accrued interest payable	0	0
Subordinate debentures	0
Federal Home Loan Bank advances	0	0
Estimated Fair Value | Significant Other Observable Inputs (Level 2)
Financial assets
Cash and due from banks	0	0
Federal funds sold	417	171
Loans, net	0	0
Mortgage loans held for sale		46,467
Accrued interest receivable	8,032	5,744
Restricted equity securities	11,681	7,774
Financial liabilities
Deposits	0	0
Accrued interest payable	1,150	305
Subordinate debentures	0
Federal Home Loan Bank advances	0	0
Estimated Fair Value | Significant Unobservable Inputs (Level 3)
Financial assets
Cash and due from banks	0	0
Federal funds sold	0	0
Loans, net	1,172,723	762,574
Mortgage loans held for sale		0
Accrued interest receivable	0	0
Restricted equity securities	0	0
Financial liabilities
Deposits	1,388,931	882,533
Accrued interest payable	0	0
Subordinate debentures	11,692
Federal Home Loan Bank advances	$ 62,572	$ 96,754

Stock-based Compensation - Text

Stock-based Compensation - Textual (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Sep. 30, 2018	Jun. 18, 2015	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized future compensation expense		$ 2,314
2015 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)			900,000
Employee Stock Option | 2011 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)	1,250,000			625,000
Expiration period	10 years

Stock-based Compensation - Stoc

Stock-based Compensation - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Shares
Outstanding, beginning (in shares)	170,761
Granted (in shares)	25,500
Exercised (in shares)	(30,001)
Forfeited or expired (in shares)	(6,000)
Outstanding, ending (in shares)	160,260	170,761
Exercisable, shares (in shares)	89,660
Weighted Average Exercise Price
Outstanding, beginning (in dollars per share)	$ 14.48
Granted (in dollars per share)	28
Exercised (in dollars per share)	13.27
Forfeited or expired (in dollars per share)	18.62
Outstanding, ending (in dollars per share)	16.71	$ 14.48
Exercisable, weighted average exercise price (in dollars per share)	$ 13.46
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Outstanding, Weighted Average Remaining Contractual Term	6 years 3 months 18 days	5 years 8 months 23 days
Granted, Weighted Average Remaining Contractual Term	9 years 9 months 29 days
Exercised, Weighted Average Remaining Contractual Term	2 years 6 months 22 days
Forfeited or expired, Weighted Average Remaining Contractual Term	8 years 5 months 9 days
Exercisable, Weighted Average Remaining Contractual Term (years)	4 years 7 months 17 days
Outstanding, Aggregate Intrinsic Value	$ 1,482	$ 1,905
Exercisable, Aggregate Intrinsic Value	$ 1,085

Stock-based Compensation - Nonv

Stock-based Compensation - Nonvested Stock Option Activity (Details)	9 Months Ended
	Sep. 30, 2018$ / sharesshares
Shares
Non-vested options, beginning (in shares) | shares	74,900
Granted (in shares) | shares	25,500
Vested (in shares) | shares	(23,800)
Forfeited (in shares) | shares	(6,000)
Non-vested options, ending (in shares) | shares	70,600
Weighted Average Grant-Date Fair Value
Non-vested options, beginning (in dollars per share) | $ / shares	$ 4.14
Granted (in dollars per share) | $ / shares	7.10
Vested (in dollars per share) | $ / shares	6.16
Forfeited (in dollars per share) | $ / shares	4.94
Non-vested options, ending (in dollars per share) | $ / shares	$ 5.30

Regulatory Capital Requiremen_3

Regulatory Capital Requirements - Summary of Bank's Actual Capital Amounts and Ratios (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier I leverage	$ 165,163	$ 126,234
Tier I leverage, ratio	10.38%	11.89%
Tier I leverage, minimum required capital including capital conservation buffer	$ 63,647	$ 42,467
Tier I leverage, minimum required capital including capital conservation buffer, ratio	4.00%	4.00%
Tier I leverage, to be well capitalized under prompt corrective action provisions	$ 79,558	$ 53,084
Tier I leverage, to be well capitalized under prompt corrective action provisions, ratio	5.00%	5.00%
Common equity tier 1	$ 153,580	$ 126,234
Common equity tier 1, ratio	11.50%	13.90%
Common equity tier 1, minimum required capital including capital conservation buffer	$ 85,137	$ 52,219
Common equity tier 1, minimum required capital including capital conservation buffer, ratio	6.375%	5.75%
Common equity tier 1, to be well capitalized under prompt corrective action provisions	$ 86,806	$ 59,030
Common equity tier 1, to be well capitalized under prompt corrective action provisions, ratio	6.50%	6.50%
Tier I risk-based capital	$ 165,163	$ 126,234
Tier I risk-based capital, ratio	12.37%	13.90%
Tier I risk-based capital, minimum required capital including capital conservation buffer	$ 105,146	$ 65,841
Tier I risk-based capital, minimum required capital including capital conservation buffer, ratio	7.875%	7.25%
Tier I risk-based capital, to be well capitalized under prompt corrective action provisions	$ 106,815	$ 72,653
Tier I risk-based capital, to be well capitalized under prompt corrective action provisions, ratio	8.00%	8.00%
Total risk-based capital	$ 176,286	$ 135,965
Total risk-based capital, ratio	13.20%	14.97%
Total risk-based capital, minimum required capital including capital conservation buffer	$ 131,881	$ 84,013
Total risk-based capital, minimum required capital including capital conservation buffer, ratio	9.875%	9.25%
Total risk-based capital, to be well capitalized under prompt corrective action provisions	$ 133,550	$ 90,825
Total risk-based capital, to be well capitalized under prompt corrective action provisions, ratio	10.00%	10.00%
Reliant Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Tier I leverage	$ 161,381	$ 123,862
Tier I leverage, ratio	10.17%	11.68%
Tier I leverage, minimum required capital including capital conservation buffer	$ 63,473	$ 42,418
Tier I leverage, minimum required capital including capital conservation buffer, ratio	4.00%	4.00%
Tier I leverage, to be well capitalized under prompt corrective action provisions	$ 79,342	$ 53,023
Tier I leverage, to be well capitalized under prompt corrective action provisions, ratio	5.00%	5.00%
Common equity tier 1	$ 161,381	$ 123,862
Common equity tier 1, ratio	12.13%	13.67%
Common equity tier 1, minimum required capital including capital conservation buffer	$ 84,815	$ 52,100
Common equity tier 1, minimum required capital including capital conservation buffer, ratio	6.375%	5.75%
Common equity tier 1, to be well capitalized under prompt corrective action provisions	$ 86,478	$ 58,896
Common equity tier 1, to be well capitalized under prompt corrective action provisions, ratio	6.50%	6.50%
Tier I risk-based capital	$ 161,381	$ 123,862
Tier I risk-based capital, ratio	12.13%	13.67%
Tier I risk-based capital, minimum required capital including capital conservation buffer	$ 104,771	$ 65,691
Tier I risk-based capital, minimum required capital including capital conservation buffer, ratio	7.875%	7.25%
Tier I risk-based capital, to be well capitalized under prompt corrective action provisions	$ 106,434	$ 72,487
Tier I risk-based capital, to be well capitalized under prompt corrective action provisions, ratio	8.00%	8.00%
Total risk-based capital	$ 172,504	$ 133,593
Total risk-based capital, ratio	12.97%	14.74%
Total risk-based capital, minimum required capital including capital conservation buffer	$ 131,340	$ 83,835
Total risk-based capital, minimum required capital including capital conservation buffer, ratio	9.875%	9.25%
Total risk-based capital, to be well capitalized under prompt corrective action provisions	$ 133,002	$ 90,633
Total risk-based capital, to be well capitalized under prompt corrective action provisions, ratio	10.00%	10.00%

Earnings Per Share - Summary of

Earnings Per Share - Summary of Components of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Basic EPS Computation
Net income attributable to common shareholders	$ 4,082	$ 1,846	$ 9,962	$ 6,091
Weighted average common shares outstanding (in shares)	11,406,753	8,174,973	11,378,755	7,878,760
Basic earnings per common share (in dollars per share)	$ 0.36	$ 0.23	$ 0.88	$ 0.77
Diluted EPS Computation
Net income attributable to common shareholders	$ 4,082	$ 1,846	$ 9,962	$ 6,091
Dilutive effect of stock options and restricted shares (in shares)	91,426	105,885	83,944	95,587
Adjusted weighted average common shares outstanding (in shares)	11,498,179	8,280,858	11,462,699	7,974,347
Diluted earnings per common share (in dollars per share)	$ 0.36	$ 0.22	$ 0.87	$ 0.76

Segment Reporting - Textual (De

Segment Reporting - Textual (Details)	9 Months Ended
	Sep. 30, 2018segment
Segment Reporting [Abstract]
Number of reportable segments	2

Segment Reporting - Summary of

Segment Reporting - Summary of Results of Operations for Company's Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Net interest income	$ 13,466	$ 9,096	$ 40,252	$ 25,570
Provision for loan losses	322	540	759	1,195
Noninterest income	2,777	2,087	8,022	4,457
Noninterest expense (excluding merger expense)	12,080	7,935	35,623	22,072
Merger expenses	82	562	2,742	562
Income tax expense (benefit)	519	306	1,431	1,005
Net income (loss)	3,240	1,840	7,719	5,193
Noncontrolling interest in net loss of subsidiary	842	6	2,243	898
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	4,082	1,846	9,962	6,091
Operating Segments | Retail Banking
Segment Reporting Information [Line Items]
Net interest income	13,295	8,924	39,529	25,224
Provision for loan losses	322	540	759	1,195
Noninterest income	1,379	516	3,966	1,704
Noninterest expense (excluding merger expense)	9,614	6,186	28,454	18,019
Merger expenses	82	562	2,742	562
Income tax expense (benefit)	574	306	1,578	1,061
Net income (loss)	4,082	1,846	9,962	6,091
Noncontrolling interest in net loss of subsidiary	0	0	0	0
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	4,082	1,846	9,962	6,091
Operating Segments | Residential Mortgage Banking
Segment Reporting Information [Line Items]
Net interest income	171	172	723	346
Provision for loan losses	0	0	0	0
Noninterest income	1,449	1,584	4,190	2,851
Noninterest expense (excluding merger expense)	2,466	1,749	7,169	4,053
Merger expenses	0	0	0	0
Income tax expense (benefit)	(55)	0	(147)	(56)
Net income (loss)	(791)	7	(2,109)	(800)
Noncontrolling interest in net loss of subsidiary	791	(7)	2,109	800
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	0	0	0	0
Elimination Entries
Segment Reporting Information [Line Items]
Net interest income	0	0	0	0
Provision for loan losses	0	0	0	0
Noninterest income	(51)	(13)	(134)	(98)
Noninterest expense (excluding merger expense)	0	0	0	0
Merger expenses	0	0	0	0
Income tax expense (benefit)	0	0	0	0
Net income (loss)	(51)	(13)	(134)	(98)
Noncontrolling interest in net loss of subsidiary	51	13	134	98
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	$ 0	$ 0	$ 0	$ 0

Derivatives - Textual (Details)

Derivatives - Textual (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative, notional amount	$ 81,505	$ 21,505
Other derivative assets, fair value disclosure	$ 1,013	155
Other derivative liabilities, fair value disclosure		$ 180

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	$ 519	$ 306	$ 1,431	$ 1,005
Effective income tax rate	14.00%	14.00%	16.00%	16.00%

Business Combination - Narrativ

Business Combination - Narrative (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Jan. 01, 2018
Business Acquisition [Line Items]
Acquisition related costs	$ 82	$ 562	$ 2,742	$ 562
Community First
Business Acquisition [Line Items]
Exchange ratio for Reliant Bancorp, Inc. common stock					0.481
Other assets adjustment			(93)
Accounts payable and other liabilities adjustment			85
Community First | Acquisition-related Costs
Business Acquisition [Line Items]
Acquisition related costs			$ 2,742	$ 562

Business Combination - Financia

Business Combination - Financial Impact of Merger (Details) $ / shares in Units, $ in Thousands	Jan. 01, 2018USD ($)shares	Sep. 30, 2018USD ($)	Dec. 31, 2017USD ($)shares	Dec. 29, 2017$ / shares
Allocation of Purchase Price
Goodwill		$ 43,642	$ 11,404
Community First
Calculation of Purchase Price
Shares of Community First common stock outstanding as of December 31, 2017 (in shares) | shares			5,025,884
Exchange ratio for Reliant Bancorp, Inc. common stock	0.481
Share conversion (in shares) | shares	2,417,450
Reliant Bancorp, Inc. common stock shares issued (in shares) | shares	2,416,444
Reliant Bancorp, Inc. share price at December 29, 2017 (in dollars per share) | $ / shares				$ 25.64
Value of Reliant Bancorp, Inc. common stock shares issued	$ 61,958
Value of fractional shares	25
Estimated fair value of Community First	61,983
Allocation of Purchase Price
Total consideration above	61,983
Cash and cash equivalents	(33,128)
Time deposits in other financial institutions	(23,309)
Investment securities available for sale	(69,078)
Loans, net of unearned income	(313,040)
Mortgage loans held for sale, net	(910)
Accrued interest receivable	(1,165)
Premises and equipment	(9,585)
Restricted equity securities	(1,726)
Cash surrender value of life insurance contracts	(10,664)
Other real estate owned	(1,650)
Deferred tax asset, net	(4,885)
Core deposit intangible	(7,888)
Other assets	(1,795)
Deposits—noninterest-bearing	80,395
Deposits—interest-bearing	352,100
Other borrowings	11,522
Payables and other liabilities	5,061
Net liabilities assumed (net assets acquired)	(29,745)
Goodwill	$ 32,238

Business Combination - Pro Form

Business Combination - Pro Forma Information (Details) - Community First - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Business Acquisition [Line Items]
Net interest income	$ 40,252	$ 38,022
Net income attributable to common shareholders	$ 9,962	$ 8,486
Earnings per share - basic (in dollars per share)	$ 0.88	$ 0.83
Earnings per share - diluted (in dollars per share)	$ 0.87	$ 0.82

Recent Accounting Pronounceme_2

Recent Accounting Pronouncements (Details) - Accounting Standards Update 2018-02 $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Tax Cuts and Jobs Act of 2017, reclassification from AOCI to retained earnings, tax effect	$ (245)
Accumulated Other Comprehensive Income
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Tax Cuts and Jobs Act of 2017, reclassification from AOCI to retained earnings, tax effect	$ 245