Primis Financial (FRST) 10-K 16 Mar 18 2017 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Mar. 06, 2018	Jun. 30, 2017
Document and Entity Information [Abstract]
Entity Registrant Name	Southern National Bancorp of Virginia Inc
Entity Central Index Key	1,325,670
Trading Symbol	sona
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Well-Known Seasoned Issuer	No
Entity Common Stock, Shares Outstanding		23,984,853
Entity Public Float			$ 395.6
Document Type	10-K
Document Period End Date	Dec. 31, 2017
Amendment Flag	false
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Cash and cash equivalents:
Cash and due from financial institutions	$ 7,937	$ 4,656
Interest-bearing deposits in other financial institutions	15,815	42,736
Federal funds sold	1,711
Total cash and cash equivalents	25,463	47,392
Securities available for sale, at fair value	160,673	3,918
Securities held to maturity, at amortized cost (fair value of $97,597 and $83,344, respectively)	98,912	85,300
Loans	2,062,328	930,415
Less allowance for loan losses	(9,397)	(8,610)
Net loans	2,052,931	921,805
Stock in Federal Reserve Bank and Federal Home Loan Bank	26,775	7,929
Equity investment in mortgage affiliate	4,723	4,629
Preferred investment in mortgage affiliate	3,305	2,555
Bank premises and equipment, net	35,788	8,227
Goodwill	100,606	10,514
Core deposit intangibles, net	10,054	874
FDIC indemnification asset	1,353	2,111
Bank-owned life insurance	50,790	23,826
Other real estate owned	7,577	8,617
Deferred tax assets, net	16,903	6,780
Other assets	18,399	7,966
Total assets	2,614,252	1,142,443
LIABILITIES AND STOCKHOLDERS' EQUITY
Noninterest-bearing demand deposits	319,189	88,783
Interest-bearing deposits:
NOW accounts	329,878	26,338
Cash management accounts		9,658
Money market accounts	355,084	129,835
Savings accounts	161,947	52,755
Time deposits	699,058	605,613
Total interest-bearing deposits	1,545,967	824,199
Total deposits	1,865,156	912,982
Securities sold under agreements to repurchase-short term	15,468
Federal Home Loan Bank (FHLB) advances-short term	335,615	95,000
Junior subordinated debt	9,534
Senior subordinated notes-long term	47,128
Other liabilities	18,579	8,117
Total liabilities	2,291,480	1,016,099
Commitments and contingencies (See Note 14)
Stockholders' equity:
Common stock, $0.01 par value. Authorized 45,000,000 shares; issued and outstanding 23,936,453 shares, at December 31, 2017 and 12,263,643 at December 31, 2016	239	123
Additional paid in capital	304,932	104,884
Retained earnings	18,753	22,126
Accumulated other comprehensive loss	(1,152)	(789)
Total stockholders' equity	322,772	126,344
Total liabilities and stockholders' equity	$ 2,614,252	$ 1,142,443

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Statement Of Financial Position [Abstract]
Securities held to maturity fair value (in dollars)	$ 97,597	$ 83,344
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	45,000,000	45,000,000
Common stock, shares issued	23,936,453	12,263,643
Common stock, shares outstanding	23,936,453	12,263,643

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Interest and dividend income:
Interest and fees on loans	$ 77,764	$ 45,348	$ 40,104
Interest and dividends on taxable securities	4,077	2,619	2,395
Interest and dividends on tax exempt securities	492	336	411
Interest and dividends on other earning assets	1,231	644	791
Interest on federal funds sold	6
Total interest and dividend income	83,570	48,947	43,701
Interest expense:
Interest on deposits	10,993	8,101	6,433
Interest on repurchase agreements	36	18	103
Interest on junior subordinated debt	253
Interest on senior subordinated notes	2,194
Interest on borrowings	2,177	514	541
Total interest expense	15,653	8,633	7,077
Net interest income	67,917	40,314	36,624
Provision for loan losses	8,625	4,912	3,171
Net interest income after provision for loan losses	59,292	35,402	33,453
Noninterest income:
Account maintenance and deposit service fees	3,564	896	953
Income from bank-owned life insurance	929	700	636
Equity (loss) income from mortgage affiliate	(345)	1,109	1,459
Net gain on other assets			7
Gain on sales of available for sale securities	255		520
Portion of OTTI recognized in other comprehensive income (before taxes)	(1,060)
Other	1,026	115	206
Total noninterest income	5,429	2,820	3,781
Noninterest expenses:
Salaries and benefits	20,285	11,675	11,860
Occupancy expenses	4,809	3,155	3,269
Furniture and equipment expenses	2,228	975	815
Amortization of core deposit intangible	845	219	261
Virginia franchise tax expense	969	387	352
FDIC assessment	802	543	664
Data processing expense	1,140	744	668
Telephone and communication expense	1,422	745	786
Amortization of FDIC indemnification asset	712	793	630
Net loss on other real estate owned	520	174	291
Merger expenses	9,426	429
Other operating expenses	5,991	2,976	3,682
Total noninterest expenses	49,149	22,815	23,278
Income before income taxes	15,572	15,407	13,956
Income tax expense	13,147	5,095	4,667
Net income	2,425	10,312	9,289
Other comprehensive income (loss):
Unrealized loss on available for sale securities	(309)	(284)	(138)
Realized amount on available for sale securities sold, net	(255)		(520)
Non-credit component of other-than-temporary impairment on held-to-maturity securities			4,278
Amortization and accretion of amounts previously recorded upon transfer to held-to-maturity from available-for sale	13	12	32
Net unrealized (loss) gain	(551)	(272)	3,652
Tax effect	(188)	(93)	1,242
Other comprehensive (loss) income	(363)	(179)	2,410
Comprehensive income	$ 2,062	$ 10,133	$ 11,699
Earnings per share, basic (in dollars per share)	$ 0.13	$ 0.84	$ 0.76
Earnings per share, diluted (in dollars per share)	$ 0.13	$ 0.83	$ 0.75

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balance at Dec. 31, 2014	$ 122	$ 104,072	$ 12,805	$ (3,020)	$ 113,979
Comprehensive income
Net income			9,289		9,289
Change in unrealized loss on securities available for sale (net of tax benefit, $224, $97 and $192 for 2017, 2016, 2015 respectively)				(434)	(434)
Change in unrecognized loss on securities held to maturity for which a portion of OTTI has been recognized (net of tax, $1,466, $4 and $4 and accretion, $32, $8 and $8 and amounts recorded into other comprehensive income at transfer respectively for 2017, 2016 and 2015)				2,844	2,844
Dividends on common stock ($0.32, $0.32 and $0.52 per share respectively for 2017, 2016 and 2015)			(6,359)		(6,359)
Repurchase of common stock (62,177 shares)	(1)	(720)			(721)
Issuance of common stock under Stock Incentive Plan (65,550 shares, 18,200 shares and 79,950 shares for 2017, 2016 and 2015 respectively)	1	706			707
Stock-based compensation expense		331			331
Balance at Dec. 31, 2015	122	104,389	15,735	(610)	119,636
Comprehensive income
Net income			10,312		10,312
Change in unrealized loss on securities available for sale (net of tax benefit, $224, $97 and $192 for 2017, 2016, 2015 respectively)				(187)	(187)
Change in unrecognized loss on securities held to maturity for which a portion of OTTI has been recognized (net of tax, $1,466, $4 and $4 and accretion, $32, $8 and $8 and amounts recorded into other comprehensive income at transfer respectively for 2017, 2016 and 2015)				8	8
Dividends on common stock ($0.32, $0.32 and $0.52 per share respectively for 2017, 2016 and 2015)			(3,921)		(3,921)
Issuance of common stock for warrants exercised (49,500 and 11,000 shares for 2017and 2015 respectively)	1	100			101
Issuance of common stock under Stock Incentive Plan (65,550 shares, 18,200 shares and 79,950 shares for 2017, 2016 and 2015 respectively)		135			135
Stock-based compensation expense		260			260
Balance at Dec. 31, 2016	123	104,884	22,126	(789)	126,344
Comprehensive income
Net income			2,425		2,425
Change in unrealized loss on securities available for sale (net of tax benefit, $224, $97 and $192 for 2017, 2016, 2015 respectively)				(372)	(372)
Change in unrecognized loss on securities held to maturity for which a portion of OTTI has been recognized (net of tax, $1,466, $4 and $4 and accretion, $32, $8 and $8 and amounts recorded into other comprehensive income at transfer respectively for 2017, 2016 and 2015)				9	9
Dividends on common stock ($0.32, $0.32 and $0.52 per share respectively for 2017, 2016 and 2015)			(5,798)		(5,798)
Issuance of common stock for warrants exercised (49,500 and 11,000 shares for 2017and 2015 respectively)		449			449
Issuance of common stock under Stock Incentive Plan (65,550 shares, 18,200 shares and 79,950 shares for 2017, 2016 and 2015 respectively)		555			555
Issuance of common stock in connection with Eastern Virginia Bankshares, Inc. merger (11,557,760 shares)	116	198,793			198,909
Stock-based compensation expense		251			251
Balance at Dec. 31, 2017	$ 239	$ 304,932	$ 18,753	$ (1,152)	$ 322,772

CONSOLIDATED STATEMENTS OF CHA6

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement Of Stockholders Equity [Abstract]
Tax on change in unrealized loss on securities available for sale	$ 224	$ 97	$ 192
Tax on change in unrecognized loss on securities held to maturity, portion of OTTI	1,466	4	4
Accretion on change in unrecognized loss on securities held to maturity, portion of OTTI	$ 32	$ 8	$ 8
Common stock dividends per share (in dollars per share)	$ 0.52	$ 0.32	$ 0.32
Repurchase of common stock (in shares)	62,177
Issuance of common stock for warrants exercised (in shares)		11,000	49,500
Issuance of common shares under Stock Incentive Plan (in shares)	79,950	18,200	65,550
Stock Issued During Period, Shares, Acquisitions			11,557,760

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating activities:
Net income	$ 2,425	$ 10,312	$ 9,289
Adjustments to reconcile net income to net cash and cash equivalents provided by operating activities:
Depreciation	2,176	798	876
Amortization of core deposit intangible	845	219	261
Other amortization, net	1,606	(36)	149
Accretion of loan discount	(3,802)	(1,874)	(2,510)
Amortization of FDIC indemnification asset	712	793	630
Provision for loan losses	8,625	4,912	3,171
Earnings on bank-owned life insurance	(929)	(700)	(636)
Equity loss (income) on mortgage affiliate	345	(1,109)	(1,459)
Stock based compensation expense	251	260	331
Net gain on sale of available for sale securities	(255)		(520)
Net loss on other real estate owned	520	174	291
Provision for deferred income taxes	9,686	29	2,132
Net decrease (increase) in other assets	6,069	2,924	(385)
Net (decrease) increase in other liabilities	(3,687)	1,321	599
Net cash and cash equivalents provided by operating activities	24,587	18,023	12,219
Investing activities:
Proceeds from sales of investment securities	4,767		3,966
Purchases of held to maturity securities	(9,950)	(46,055)	(18,153)
Purchases of available for sale investment securities	(3,247)
Proceeds from paydowns, maturities and calls of available for sale investmen securities	7,987		1
Proceeds from paydowns, maturities and calls of held to maturity investment securities	11,037	57,622	13,607
Loan originations and payments, net	(104,009)	(108,760)	(127,334)
Proceeds from sales of loans held for sale	19,689
Purchase of bank-owned life insurance			(1,500)
Investment in mortgage affiliate, net	46	939	(119)
Net increase in stock in Federal Reserve Bank and Federal Home Loan Bank	(12,112)	(1,000)	(1,248)
Payments received on FDIC indemnification asset	46	18	3
Proceeds from sale of other real estate owned	1,110	1,790	4,048
Purchases of bank premises and equipment	(1,425)	(143)	(307)
Proceeds from sales of bank premises and equipment	40
Net cash acquired in acquisition of Eastern Virginia Bankshares, Inc.	24,015
Net cash and cash equivalents used in investing activities	(62,006)	(95,589)	(127,036)
Financing activities:
Net (decrease) increase in deposits	(196,801)	77,307	82,869
Cash dividends paid - common stock	(5,798)	(3,921)	(6,359)
Issuance of common stock under Stock Incentive Plan	555	135	707
Issuance of common stock for warrants exercised	449	101
Issuance of subordinated notes, net of cost	26,075
Repurchase of common stock			(721)
Net decrease in long-term borrowings			(10,000)
Net increase in short-term borrowings	191,010	21,000	40,337
Net cash and cash equivalents provided by financing activities	15,490	94,622	106,833
(Decrease) increase in cash and cash equivalents	(21,929)	17,056	(7,984)
Cash and cash equivalents at beginning of period	47,392	30,336	38,320
Cash and cash equivalents at end of period	25,463	47,392	30,336
Cash payments for:
Interest	14,571	8,289	6,791
Income taxes	3,671	4,604	2,993
Supplemental schedule of noncash investing and financing activities
Transfer from loans to other real estate owned	43	144	$ 1,727
Transfer from long-term FHLB advances to short-term FHLB advances		15,000
Transfer from securities sold under agreement to repurchase to deposits		$ 10,381
Fair value of intangible assets acquired	1,356,637
Other intangible assets acquired	100,127
Fair value of liabilities assumed	(1,257,845)
Total merger consideration	$ 198,919

ORGANIZATION AND SIGNIFICANT AC

ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
	Dec. 31, 2017
Organization And Significant Accounting Policies [Abstract]
ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES	1. ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES  Southern National Bancorp of Virginia, Inc. (“Southern National” or “SNBV” or the “Company”) is a corporation that was formed on July 28, 2004 under the laws of the Commonwealth of Virginia and is the holding company for Sonabank (“Sonabank” or the “Bank”) a Virginia state-chartered bank which commenced operations on April 14, 2005. As of the close of business on June 23, 2017, SNBV completed its merger with Eastern Virginia Bankshares, Inc. (“EVBS”) and the merger of EVBS’s wholly-owned subsidiary, EVB, with and into SNBV’s wholly-owned subsidiary, Sonabank (see Note 2 - Business Combinations). Sonabank provides a range of financial services to individuals and small and medium sized businesses. At December 31, 2017, Sonabank had thirty-eight full-service retail branches in Virginia, located in the counties of Chesterfield (2) , Essex ( 2 ), Fairfax (Reston, McLean and Fairfax), Gloucester (2), Hanover (3), King William, Lancaster, Middlesex (3), New Kent, Northumberland (3), Southampton, Surry, Sussex, and in Charlottesville, Clifton Forge, Colonial Heights, Front Royal, Hampton, Haymarket, Leesburg, Middleburg, New Market, Newport News, Richmond, South Riding, Warrenton, and Williamsburg, and seven full-service retail branches in Maryland, in Rockville, Shady Grove, Bethesda, Upper Marlboro, Brandywine, Owings and Huntingtown.  The accounting policies and practices of Southern National and its subsidiaries conform to U.S. generally accepted accounting principles (“U.S. GAAP”) and to general practice within the banking industry. Major policies and practices are described below:  Principles of Consolidation  The consolidated financial statements include the accounts of Southern National and its subsidiaries Sonabank and EVB Statutory Trust I (the “Trust”). Significant inter-company accounts and transactions have been eliminated in consolidation. Southern National consolidates subsidiaries in which it holds, directly or indirectly, more than 50 percent of the voting rights or where it exercises control. Entities where Southern National holds 20 to 50 percent of the voting rights, or has the ability to exercise significant influence, or both, are accounted for under the equity method. Southern National has an interest in one affiliate, Southern Trust Mortgage, LLC (“STM”), which it accounts for as an equity method investment. In addition, Southern National owns the Trust which is an unconsolidated subsidiary. The junior subordinated debt owed to the Trust is reported as a liability of Southern National.  Use of Estimates  The preparation of the consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from these estimates. Material estimates that are particularly susceptible to significant change in the near term include: the determination of the allowance for loan losses, the carrying value of investment securities, other than temporary impairment of investment securities, the valuation of goodwill and intangible assets, fair value measurements related to assets acquired and liabilities assumed from business combinations, the FDIC indemnification asset, other real estate owned (“OREO”) and deferred tax assets.  Business Combinations  U.S. GAAP requires that the acquisition method of accounting be used for all business combinations and that an acquirer be identified for each business combination. Under U.S. GAAP, the acquirer is the entity that obtains control of one or more businesses in the business combination, and the acquisition date is the date the acquirer achieves control. U.S. GAAP requires that the acquirer recognize the fair value of assets acquired, liabilities assumed, and any non ‑controlling interest in the acquiree at the acquisition date.  Investment Securities  Debt securities that Southern National has the positive intent and ability to hold to maturity are classified as held-to-maturity and carried at amortized cost.  Securities classified as available for sale are those debt securities that may be sold in response to changes in interest rates, liquidity needs or other similar factors. Securities available for sale are carried at fair value, with unrealized gains or losses net of deferred taxes, included in accumulated other comprehensive income (loss) in stockholders' equity.  Purchased premiums and discounts are recognized in interest income using the interest method over the terms of the securities without anticipating prepayments, except for mortgage-backed securities where prepayments are anticipated. Gains and losses on the sale of investment securities are recorded on the settlement date and are determined using the specific identification method.  Southern National purchases amortizing investment securities in which the underlying assets are residential mortgage loans subject to prepayments. The actual principal reduction on these assets varies from the expected contractual principal reduction due to principal prepayments resulting from the borrowers’ election to refinance the underlying mortgage based on market and other conditions. The purchased premiums and discounts associated with these assets are amortized or accreted to interest income over the estimated life of the related assets. The estimated life is calculated by projecting future prepayments and the resulting principal cash flows until maturity. Prepayment rate projections utilize actual prepayment speed experience and available market information on like-kind instruments. The prepayment rates form the basis for income recognition of premiums and discounts on the related assets. Changes in prepayment estimates may cause the earnings recognized on these assets to vary over the term that the assets are held, creating volatility in the net interest margin. Prepayment rate assumptions are monitored and updated monthly to reflect actual activity and the most recent market projections.  Management evaluates investment securities for other-than-temporary impairment (“OTTI”) on at least a quarterly basis, and more frequently when economic or market conditions warrant such an evaluation. For investment securities in an unrealized loss position, management considers the extent and duration of the unrealized loss, and the financial condition and near-term prospects of the issuer. Management also assesses whether it intends to sell, or it is more likely than not that it will be required to sell, an investment security in an unrealized loss position before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the entire difference between amortized cost and fair value is recognized as impairment through earnings. For debt securities that do not meet the aforementioned criteria, the amount of impairment is split into two components as follows: 1) OTTI related to credit loss, which must be recognized in the income statement and 2) OTTI related to other factors, which is recognized in other comprehensive income. The credit loss is defined as the difference between the present value of the cash flows expected to be collected and the amortized cost basis. For equity securities, the entire amount of impairment is recognized through earnings.  In order to determine OTTI for purchased beneficial interests that, on the purchase date, were not highly rated, Southern National compares the present value of the remaining cash flows as estimated at the preceding evaluation date to the current expected remaining cash flows. OTTI is deemed to have occurred if there has been an adverse change in the remaining expected future cash flows.  Loans  Southern National provides mortgage, commercial and consumer loans to customers. A substantial portion of the loan portfolio is represented by loans secured by real estate throughout its market area. The ability of Southern National’s debtors to honor their contracts is in varying degrees dependent upon the real estate market conditions and general economic conditions in this area.  Loans that management has the intent and ability to hold for the foreseeable future or until maturity or pay-off are reported at their outstanding unpaid principal balances adjusted for the allowance for loan losses, purchased premiums and discounts and any deferred loan fees or costs on originated loans. Interest income is accrued on the unpaid principal balance. Loan origination fees, net of certain direct origination costs, are deferred and recognized as an adjustment of the related loan yield using the interest method without anticipating prepayments.  As part of the Greater Atlantic Bank (“GAB”) acquisition, the Bank and the Federal Deposit Insurance Corporation (“FDIC”) entered into a loss sharing agreement on approximately $143.4 million (cost basis) of GAB’s assets. The Bank will share in the losses on the loans and foreclosed loan collateral with the FDIC as specified in the loss sharing agreement; we refer to these assets collectively as “covered assets.” The indemnification against losses in the GAB commercial portfolio ended in December 2014. The FDIC indemnification on the GAB residential mortgages and the GAB HELOCS continues until December 2019. Loans that are not covered in the loss sharing agreement with the FDIC are referred to as “non-covered loans.”  The accrual of interest on all loans is discontinued at the time the loan is 90 days delinquent unless the credit is well secured and in process of collection. In all cases, loans are placed on nonaccrual status or charged-off at an earlier date if collection of principal and interest is considered doubtful.  All interest accrued but not collected for loans that are placed on nonaccrual status or charged-off is reversed against interest income. The interest on these loans is accounted for on the cash-basis or cost-recovery method, until qualifying for return to accrual status. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured.  Most of Southern National’s business activity is with customers located within Virginia and Maryland. Therefore, our exposure to credit risk is significantly affected by changes in the economy in those areas. We are not dependent on any single customer or group of customers whose insolvency would have a material adverse effect on operations.  Southern National has purchased, primarily through acquisitions, individual loans and groups of loans, some of which have shown evidence of credit deterioration since origination. These purchased loans are recorded at fair value such that there is no carryover of the seller’s allowance for loan losses. After acquisition, losses are recognized by an increase in the allowance for loan losses. Purchased credit-impaired (“PCI”) loans are accounted for using the expected cash flow methodology, and purchased performing loans are accounted for using the contractual cash flow methodology.  Such purchased loans are accounted for individually or aggregated into pools of loans based on common risk characteristics such as, credit score, loan type, and date of origination. Southern National estimates the amount and timing of expected cash flows for each PCI loan or pool, and the expected cash flows in excess of fair value are recorded as interest income over the remaining life of the loan or pool (accretable yield). The excess of the loans’ or pool’s contractual principal and interest over expected cash flows is not recorded (nonaccretable difference).  Over the life of the loan or pool, expected cash flows continue to be estimated. If the present value of expected cash flows is less than the carrying amount, a loss is recorded. If the present value of expected cash flows is greater than the carrying amount, it is recognized as part of future interest income.  In accordance with Accounting Standards Codification (“ASC”) 310-30 , “ Loans and debt securities acquired with Deteriorated Credit Quality ,” and based on current information and events, if it becomes probable that there is a significant increase in cash flows previously expected to be collected or if actual cash flows are significantly greater than cash flows previously expected, the Bank will recalculate the amount of accretable yield for the acquired loans as the excess of the revised cash flows expected to be collected over the sum of (1) the initial investment in the loans less (2) cash collected less (3) write downs, if any plus (4) the amount of yield accreted to date. The amount of accretable yield will be adjusted by reclassification from non-accretable yield. This adjustment would be accounted for as a change in estimate with the amount of periodic accretion adjusted over the remaining life of the loans.  Allowance for Loan and Lease Losses (“ALLL”)  The allowance for loan and lease losses is a valuation allowance for probable incurred credit losses. Loan losses are charged against the allowance when management believes the collection of the principal is unlikely. Recoveries of amounts previously charged-off are credited to the allowance. Management's determination of the adequacy of the allowance is based on a three year historical average net loss experience for each portfolio segment adjusted for current industry and economic conditions and estimates of their effect on loan collectability. While management uses available information to estimate losses on loans, future additions to the allowance may be necessary based on changes in economic conditions, particularly those affecting real estate values.  The allowance consists of specific and general components. The specific component relates to loans that are individually classified as impaired. The general component provides for estimated losses in unimpaired loans and is based on historical loss experience adjusted for current factors.  A loan is considered impaired when, based on current information and events, it is probable that Southern National will be unable to collect the scheduled payments of principal or interest when due according to the terms of the loan. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower's prior payment record, and the amount of the shortfall in relation to the principal and interest owed. Impairment is measured on a loan by loan basis by either the present value of expected future cash flows discounted at the loan's effective interest rate, the loan's obtainable market price, or the fair value of the collateral if the loan is collateral dependent.  The general component covers non ‑impaired loans and is based on historical loss experience adjusted for current factors. The historical loss experience is determined by portfolio segment and is based on the actual net loss history experienced by Southern National over the most recent three years. This actual loss experience is supplemented with other economic factors based on the risks present for each portfolio segment. These economic factors include consideration of the following: levels of and trends in delinquencies and impaired loans; levels of and trends in charge-offs and recoveries; trends in volume and terms of loans; effects of any changes in risk selection and underwriting standards; other changes in lending policies, procedures, and practices; experience, ability, and depth of lending management and other relevant staff; national and local economic trends and conditions; industry conditions; and effects of changes in credit concentrations. The following portfolio segments have been identified: owner occupied commercial real estate, non-owner occupied commercial real estate, construction and land development, commercial loans, 1-4 family residential, and other consumer. While underwriting practices in this environment are more stringent, the Bank estimates the effect of internal factors on future net loss experience to be negligible. Management’s estimate of the effect of current external economic environmental conditions on future net loss experience is significant in all loan segments and particularly on loans secured by real estate including single family 1-4, non-owner occupied commercial real estate and construction and land development loans. These factors include excess inventory, generally less demand driven in part by fewer qualified borrowers and buyers. These considerations have played a significant role in management’s estimate of the adequacy of the allowance for loan and lease losses.  Commercial real estate consists of borrowings secured by owner occupied and non-owner occupied commercial real estate. Repayment of these loans is dependent upon rental income or the subsequent sale of the property for loans secured by non-owner occupied commercial real estate and by cash flows from business operations for owner occupied commercial real estate. Loans for which the source of repayment is rental income are primarily impacted by local economic conditions which dictate occupancy rates and the amount of rent charged. Commercial real estate loans that are dependent on cash flows from operations can also be adversely affected by current market conditions for their product or service.  Construction and land development primarily consist of borrowings to purchase and develop raw land into residential and non-residential properties. Construction loans are extended to individuals as well as corporations for the construction of an individual or multiple properties and are secured by raw land and the subsequent improvements. Repayment of the loans to real estate developers is dependent upon the sale or lease of properties to third parties in a timely fashion upon completion. Should there be delays in construction or a downturn in the market for those properties, there may be significant erosion in value which may be absorbed by Southern National. Commercial loans consist of borrowings for commercial purposes to individuals, corporations, partnerships, sole proprietorships, and other business enterprises. Commercial loans are generally secured by business assets such as equipment, accounts receivable, inventory, or any other asset excluding real estate and generally made to finance capital expenditures or operations. Southern National’s risk exposure is related to deterioration in the value of collateral securing the loan should foreclosure become necessary. Generally, business assets used or produced in operations do not maintain their value upon foreclosure which may require Southern National to write-down the value significantly to sell.  Residential real estate loans consist of loans to individuals for the purchase of primary residences with repayment primarily through wage or other income sources of the individual borrower. Southern National’s loss exposure to these loans is dependent on local market conditions for residential properties as loan amounts are determined, in part, by the fair value of the property at origination.  On May 15, 2014, we purchased a 44.0% equity investment and preferred stock of STM, a regional mortgage banking company headquartered in Virginia Beach, Virginia. On June 23, 2017, in connection with the EVBS acquisition, we added 4.9% of additional equity investment and preferred stock in STM, bringing us to a total equity investment of 48.9% . STM has mortgage banking originators in Delaware, Virginia, Maryland, North Carolina and South Carolina. STM only originates retail mortgage production.  Sonabank has established with STM underwriting guidelines under which it will purchase residential construction only, construction loans that convert to permanent, and permanent loans primarily in its Virginia and Maryland footprint from STM. These will be largely loans that do not conform to FNMA or FHLMC standards because of size or acreage.  Other consumer loans are comprised of loans to individuals both unsecured and secured and home equity loans secured by real estate (closed and open-end), with repayment dependent on individual wages and other income. The risk of loss on consumer loans is elevated as the collateral securing these loans, if any, rapidly depreciate in value or may be worthless and/or difficult to locate if repossession is necessary. Losses in this portfolio are generally relatively low, however, due to the small individual loan size and the balance outstanding as a percentage of Southern National’s entire portfolio.  Transfers of Financial Assets  Transfers of financial assets are accounted for as sales, when control over the assets has been relinquished. Control over transferred assets is deemed to be surrendered when the assets have been isolated from Southern National, the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets, and Southern National does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity.  Equity Method Investments  Southern National’s investment in STM, our mortgage affiliate, is being accounted for under the equity method. Under the equity method, the carrying value of Southern National’s investment in STM was originally recorded at cost but is adjusted periodically to record Southern National’s proportionate share of STM’s earnings or losses through noninterest income and decreased by the amount of cash dividends or similar distributions received from STM.  Bank Premises and Equipment  Land is carried at cost. Premises and equipment are stated at cost less accumulated depreciation. Buildings and related components are depreciated using the straight-line method with useful lives of 30 years . Furniture, fixtures and equipment are depreciated using the straight-line method with useful lives ranging from 3 to 10 years. Leasehold improvements are amortized over the shorter of their estimated useful lives or the lease term.  Goodwill and Intangible Assets  Goodwill resulting from business combinations after January 1, 2009, is generally determined as the excess of the fair value of the consideration transferred, plus the fair value of any noncontrolling interests in the acquiree, over the fair value of the net assets acquired and liabilities assumed as of the acquisition date. Goodwill and intangible assets acquired in a purchase business combination and determined to have an indefinite useful life are not amortized, but tested for impairment at least annually. Southern National has selected September 30 th as the date to perform the annual goodwill impairment assessment. Intangible assets with definite useful lives are amortized over their estimated useful lives to their estimated residual values. Goodwill is the only intangible asset with an indefinite life on our balance sheet.  Other intangible assets consist of loan servicing rights and core deposit intangible assets arising from whole-bank and branch acquisitions and are amortized over their estimated useful lives, which range from 6 to 15 years .  Stock Based Compensation  Compensation cost is recognized for stock options issued to employees, based on the fair value of these awards at the date of grant. A Black-Scholes option-pricing model is utilized to estimate the fair value of stock options. Compensation cost for grants of restricted shares is accounted for based on the closing price of Southern National’s common stock on the date the restricted shares are awarded. Compensation cost for stock options and restricted shares is recognized over the required service period, generally defined as the vesting period. For awards with graded vesting, compensation cost is recognized on a straight-line basis over the requisite service period for the entire award.  Bank-owned Life Insurance  Southern National has purchased, and acquired through acquisitions, life insurance policies on certain key executives. Bank-owned life insurance is recorded at the amount that can be realized under the insurance contract at the balance sheet date, which is the cash surrender value adjusted for other charges or other amounts due that are probable at settlement.  Other Real Estate Owned (“OREO”)  Real estate acquired through or instead of foreclosure is held for sale and initially recorded at fair value less costs to sell when acquired, establishing a new cost basis. If fair value declines subsequent to foreclosure, the direct charge-off method is recorded through expense. Operating costs after acquisition are expensed as incurred.  Stock in Federal Home Loan Bank (“FHLB”) and Federal Reserve Bank (“FRB”)  The Bank is a member of the FHLB system. Members are required to own a certain amount of stock based on the level of borrowings and other factors, and may invest in additional amounts. The Bank is also required to own FRB stock with a par value equal to 6% of capital. FHLB and FRB stock are carried at cost, classified as a restricted security, and periodically evaluated for impairment based on ultimate recovery of par value. Both cash and stock dividends are reported as income.  Impairment of Long-Lived Assets  Premises and equipment, core deposit intangible assets, the FDIC indemnification asset and other long-term assets are reviewed for impairment when events indicate their carrying amount may not be recoverable from future undiscounted cash flows. If impaired, the assets are recorded at fair value.  FDIC Indemnification Asset  The acquisition of GAB on December 4, 2009 was accounted for under the acquisition method of accounting, and the assets and liabilities were recorded at their estimated fair values. The FDIC indemnification asset was measured separately from each of the covered asset categories as it is not contractually embedded in any of the covered asset categories. The indemnification asset represents the present value of cash flows expected to be received from the FDIC for future losses on covered assets based on the expected credit losses estimated for each covered loan or loan pool and the loss sharing percentages at the acquisition date. Cash flows are discounted at a market-based rate to reflect the uncertainty of the timing of the loss sharing reimbursement from the FDIC. The ultimate collectability of this asset is dependent upon the performance of the underlying covered assets, the passage of time and claims paid by the FDIC. We acquired the GAB loans in December 2009 and continuously evaluate our estimates of expected losses on these loans. During 2017, and based on the actual historical losses on the loan pools over the previous 24-month period, expected losses on the acquired GAB loans (the covered loans) were lower than previously forecasted which results in a lower expected recovery from the FDIC. As of December 31, 2017, we expect to recover $309 thousand from the FDIC under the indemnification agreement. The difference between the carrying amount of $ 1.4 million and the estimated recovery is being amortized over the remaining life of the indemnification agreement or the expected life of the loans, whichever is shorter. There were two agreements with the FDIC, one for single family assets which is a 10 - year agreement expiring in December 2019, and one for non-single family (commercial) assets which was a 5 - year agreement which expired in December 2014. The current overstatement is due to improvements in the loss estimates in the single family covered loans.  Retirement Plans  Employee 401(k) plan expense is the amount of matching contributions. Supplemental retirement plan expense allocates the benefits over years of service.  Loss Contingencies  Loss contingencies, including claims and legal actions arising in the ordinary course of business, are recorded as liabilities when the likelihood of loss is probable and an amount or range of loss can be reasonably estimated. Management does not believe there are such matters that will have a material effect on the financial statements.  Dividend Restriction  Banking regulations require maintaining certain capital levels and may limit the dividends paid by the Bank to Southern National or by Southern National to shareholders.  Estimates and Uncertainties  Estimates including the carrying value of investment securities, other than temporary impairment of investment securities, the determination of the allowance for loan losses, expected loan performance and recoveries from the FDIC, the valuation of goodwill, intangible assets, OREO and deferred tax assets, and fair value measurements related to assets acquired and liabilities assumed from business combinations, involves uncertainties and matters of significant judgement regarding interest rates, credit risk, repayments and 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.  Operating Segments  While the chief decision-makers monitor the revenue streams of the various products and services, operations are managed and financial performance is evaluated on a company-wide basis. Discrete financial information is not available other than on a company-wide basis. Accordingly, all of the financial service operations are considered by management to be aggregated in one reportable operating segment.  Reclassifications  In certain instances, amounts reported in prior years’ consolidated financial statements have been reclassified to conform to the current financial statement presentation. Such reclassifications had no effect on previously reported cash flows, shareholders’ equity or net income.     Income Taxes  Income tax expense is the total of the current year income tax due or refundable and the change in deferred tax assets and liabilities. Deferred tax assets and liabilities are the expected future tax amounts for the temporary differences between carrying amounts and tax bases of assets and liabilities, computed using enacted tax rates. A valuation allowance, if needed, reduces deferred tax assets to the amount expected to be realized. A tax position is recognized as a benefit only if it is “more likely than not” that the tax position would be sustained in a tax examination, with a tax examination being presumed to occur. The amount recognized is the largest amount of tax benefit that is greater than 50% likely of being realized on examination. For tax positions not meeting the “more likely than not” test, no tax benefit is recorded. We have no unrecognized tax benefits and do not anticipate any increase in unrecognized tax benefits during the next twelve months. Should the accrual of any interest or penalties relative to unrecognized tax benefits be necessary, it is our policy to record such accruals in our income tax accounts; no such accruals exist as of December 31, 2017. Southern National and its subsidiaries file a consolidated U.S. federal tax return; Sonabank files a Maryland state income tax return and Southern National files a Virginia state income tax return. These returns are subject to examination by taxing authorities for all years after 2013.  On December 22, 2017 t he Tax Cuts and Jobs Act was enacted into Federal Law. The new law establishes a new flat corporate federal statutory income tax rate of 21% . For more information on the impact the new law had on Southern National, see discussion in Note 12 - Income Taxes. Restrictions on Cash  No regulatory reserve or clearing requirements with the FRB were needed at December 31, 2017. However, cash on hand or on deposit with the FRB was required to meet regulatory reserve and clearing requirements of $2.9 million at December 31, 2016.  Consolidated Statements of Cash Flows  For purposes of reporting cash flows, Southern National defines cash and cash equivalents as cash due from financial institut

BUSINESS COMBINATIONS

BUSINESS COMBINATIONS	12 Months Ended
	Dec. 31, 2017
Business Combinations [Abstract]
BUSINESS COMBINATIONS	2. BUSINESS COMBINATIONS  On June 23, 2017, SNBV completed its acquisition of EVBS and its subsidiaries, the Trust and EVB. Pursuant to the Agreement and Plan of Merger, dated December 13, 2016, as amended, holders of EVBS common stock received 0.6313 shares of SNBV common stock for each outstanding share of EVBS common stock held immediately prior to the effective time of the Merger and holders of Non-Voting Mandatorily Convertible Non-Cumulative Preferred Stock, Series B of EVBS (“EVBS Series B Preferred Stock”) received 0.6313 shares of SNBV common stock for each share of EVBS Series B Preferred Stock held immediately prior to the effective time of the Merger, which totaled approximately $198.9 million based on SNBV’s closing common stock price on June 23, 2017 of $17.21 per share. EVBS was a bank holding company organized and chartered under the laws of the Commonwealth of Virginia on September 5, 1997, commenced operations on December 29, 1997 and was headquartered in Glen Allen, Virginia. Prior to the merger, EVBS operated twenty-four retail branches, which served diverse markets primarily in the counties of Essex, Gloucester, Hanover, Henrico, King and Queen, King William, Lancaster, Middlesex, New Kent, Northumberland, Southampton, Surry, Sussex and the cities of Colonial Heights, Hampton, Newport News, Richmond and Williamsburg. SNBV accounted for the acquisition using the acquisition method of accounting in accordance with FASB ASC 805, “Business Combinations.” Under the acquisition method of accounting, the assets and liabilities of EVBS were recorded at their respective acquisition date fair values. Determining the fair value of assets and liabilities, particularly related to the loan portfolio, involv es significant judgment regarding methods and assumptions used to calculate the estimated fair values. The fair values are preliminary and subject to refinement for up to one year after the acquisition date as additional information relative to the acquisition date fair values becomes available. SNBV recognized goodwill of $90.1 million in connection with the acquisition, none of which is deductible for income tax purposes.  The following table details the total consideration paid by SNBV on June 23, 2017 in connection with the acquisition of EVBS, the fair values of the assets acquired and liabilities assumed, and the resulting goodwill:     As Recorded Fair Value As Recorded  (dollars in thousands) by EVBS Adjustments by the Company  Consideration paid:  Cash $ 10  SNBV common stock 198,909  Total consideration paid $ 198,919   Identifiable assets acquired:  Cash and due from banks $ 4,350 $ - $ 4,350  Interest bearing deposits with banks 18,993 - 18,993  Federal funds sold 682 - 682  Securities available for sale, at fair value 163,029 (150) 162,879  Securities held to maturity, at carrying value 19,036 508 19,544  Restricted securities, at cost 6,734 - 6,734  Loans 1,045,600 (13,618) 1,031,982  Loans held for sale 19,689 - 19,689  Deferred income taxes 15,735 4,912 20,647  Bank premises and equipment 24,242 4,110 28,352  Assets held for sale 2,970 (1,043) 1,927  Accrued interest receivable 4,272 - 4,272  Other real estate owned 563 (16) 547  Core deposit intangible 435 9,590 10,025  Bank owned life insurance 26,035 - 26,035  Other assets 10,004 - 10,004  Total identifiable assets acquired 1,362,369 4,293 1,366,662   Identifiable liabilities assumed:  Noninterest-bearing demand accounts 226,637 - 226,637  Interest-bearing deposits 920,743 1,182 921,925  Federal funds purchased and repurchase agreements 7,598 - 7,598  Federal Home Loan Bank advances 57,475 - 57,475  Junior subordinated debt 10,310 (801) 9,509  Senior subordinated notes 19,175 1,876 21,051  Accrued interest payable 902 - 902  Other liabilities 12,748 - 12,748  Total identifiable liabilities assumed 1,255,588 2,257 1,257,845   Net identifiable assets acquired $ 106,781 $ 2,036 $ 108,817   Goodwill resulting from acquisition $ 90,102   The net effect of the amortization of premiums and accretion of discounts associated with the Company’s acquisition accounting adjustments to assets acquired and liabilities assumed from EVBS had the following impact on the consolidated statements of income for the year ended December 31, 2017:     For the Year Ended  (dollars in thousands) December 31, 2017  Loans (1) $ 2,800  Time deposits (2) 407  Junior and senior subordinated debt (3) 43  Core deposit intangible (4) (651)  Net impact to income before income taxes $ 2,599     (1) Loan discount accretion is included in the “Interest and fees on loans” section of “Interest and dividend income” in the Consolidated Statements of Income. (2) Time deposit premium amortization is included in the "Interest on deposits" section of "Interest expense" in the Consolidated Statements of Income. (3) The junior subordinated debt discount accretion and senior subordinated notes premium amortization are included in the “Interest on junior subordinated debt” and “Interest on senior subordinated notes” section of “Interest expense”, respectively, in the Consolidated Statements of Income. (4) Core deposit intangible premium amortization is included in the "Other operating expenses" section of "Noninterest expenses" in the Consolidated Statements of Income. Fair values of the major categories of assets acquired and liabilities assumed were determined as follows: Loans : The acquired loans were recorded at fair value at the acquisition date of $1.03 billion without carryover of EVBS’s allowance for loan losses. The unpaid principal balance and discount at the merger date were $1.05 billion and $ 21.4 million, respectively. Where loans exhibited characteristics of performance, fair value was determined based on a discounted cash flow analysis which included default estimates; loans without such characteristics, fair value was determined based on the estimated values of the underlying collateral. While estimating the amount and timing of both principal and interest cash flows expected to be collected, a market-based discount rate was applied. In this regard, the acquired loans were segregated into pools based on loan type and credit risk. Loan type was determined based on collateral type and purpose, industry segment and loan structure. Credit risk characteristics included risk rating groups pass, special mention and substandard and lien position. For valuation purposes, these pools were further disaggregated by maturity and pricing characteristics (e.g., fixed-rate, adjustable-rate, balloon maturities).  Included in the $1.05 billion of acquired loans were certain loans acquired with deteriorating credit quality, or purchased credit impaired loans. The table below summarizes the purchased credit impaired loans acquired in the EVBS acquisition on June 23, 2017 (in thousands):    Purchased Credit  Impaired Loans  Contractually required principal and interest at acquisition $ 17,970  Contractual cash flows not expected to be collected (nonaccretable difference) (6,243)  Expected cash flows at acquisition 11,727  Accretable difference 398  Basis in acquired loans at acquisition - estimated fair value $ 11,329  Loans Held for Sale : The $19.7 million of acquired loans held for sale were recorded at fair value at the acquisition date. Acquired loans held for sale represent the potentially credit-impaired loans that were moved out of the held for investment portfolio and marked to fair value by EVBS just prior to the closing of the merger. Fair value was determined using quoted prices from an independent, third party buyer. Subsequent to the acquisition date, all acquired loans held for sale were sold to an independent third party. Premises and Equipment and Assets Held for Sale : The fair value of EVBS’s premises, including land, buildings and improvements, was determined based upon appraisal by licensed appraisers. These appraisals were based upon the best and highest use of the property with final values determined based upon an analysis of the cost, sales comparison and income capitalization approaches for each property appraised. The fair value of bank-owned real estate resulted in a net premium of $3.1 million. Land is not depreciated. Core Deposit Intangible : The fair value of the core deposit intangible (“CDI”) was determined based on a combined discounted economic benefit and market approach. The economic benefit was calculated as the cost savings between maintaining the core deposit base and using an alternate funding source, such as FHLB advances. The life of the deposit base and projected deposit attrition rates was determined using EVBS's historical deposit data. The CDI was estimated at $10.0 million or 0.9% of total deposits. The CDI is being amortized over a weighted average life of 96 months using the straight-line method. Time Deposits : The fair value of time deposits was determined based on the discounted value of contractual cash flows. The discount rate is estimated using the rates currently offered for deposits of similar remaining maturities. The resulting estimated fair value adjustment of time deposits is a $1.2 million premium and is being amortized over the weighted average remaining life of approximately 18 months using the straight-line method. FHLB Advances : The fair value of FHLB advances was considered to be equivalent to EVBS’s recorded book balance as the advances mature in 90 days or less. Junior Subordinated Debt and Senior Subordinated Notes: The fair value of the junior subordinated debt and senior subordinated notes were based on discounted cash flows using rates for securities with similar terms. The resulting estimated fair value adjustment of junior subordinated debt is a $801 thousand discount and is being accreted over the remaining life of approximately 195 months using the straight-line method. The resulting estimated fair value adjustment of sen ior subordinated notes is a $1. 9 million premium and is being amortized over the remaining life of approximately 95 months using the straight-line method.  Deferred Income Taxes : Certain deferred tax assets and liabilities were carried over to SNBV from EVBS based on the Company’s ability to utilize them in the future. Additionally, deferred tax assets and liabilities were established for acquisition accounting fair value adjustments as the future amortization/accretion of these adjustments represent temporary differences between book income and taxable income. The table below illustrates the pro forma revenue , net income , and earnings per share (basic and diluted) of the combined entities had the acquisitio n taken place on January 1, 2015 . The combined pro forma revenue , net income , and earnings per share (basic and diluted) combines the historical results of EVBS with the Company's consolidated statements of income for the periods listed below and, while certain adjustments were made for the estimated effect of certain fair value adjustments and other acquisition-related activity, they are not indicative of what would have occurred had the acquisition actually taken place on Januar y 1, 2015 . Acqu isition-related expenses of $9.4 million , $429 thousand , and $0 were included in the Company's reported consolidated statements of income for the years ended December 31, 2017, 2016, and 2015 , respectively, but were excluded from the pro forma information listed below.   Southern National expects to achieve further operational cost savings and other efficiencies as a result of the acquisition which are not reflected in the pro forma amounts below:    Pro Forma Pro Forma  Twelve Months Ended Twelve Months Ended  December 31, December 31,  (dollars in thousands, except per share data) 2017 2016  Net interest income $ 91,010 $ 85,114  Net income 9,555 18,354   Earnings per share, basic $ 0.40 $ 0.77  Earnings per share, diluted $ 0.39 $ 0.76   Weighted average shares outstanding - Basic 23,923,410 23,923,410  Weighted average shares outstanding - Diluted 24,228,054 24,228,054  

INVESTMENT SECURITIES

INVESTMENT SECURITIES	12 Months Ended
	Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract]
SECURITIES	3. INVESTMENT SECURITIES  The amortized cost and fair value of available for sale investment securities and the related gross unrealized gains and losses recognized in accumulated other comprehensive income (loss) were as follows (in thousands):     Amortized Gross Unrealized Fair  December 31, 2017 Cost Gains Losses Value  Residential government-sponsored mortgage-backed securities $ 31,145 $ 3 $ (284) $ 30,864  Obligations of states and political subdivisions 18,581 187 (41) 18,727  Corporate securities 2,013 2 - 2,015  Trust preferred securities 2,590 - (202) 2,388  Residential government-sponsored collateralized  mortgage obligations 51,521 1 (756) 50,766  Government-sponsored agency securities 3,247 - (21) 3,226  Agency commercial mortgage-backed securities 28,263 - (365) 27,898  SBA pool securities 24,829 68 (108) 24,789  $ 162,189 $ 261 $ (1,777) $ 160,673   Amortized Gross Unrealized Fair  December 31, 2016 Cost Gains Losses Value  Obligations of states and political subdivisions $ 2,280 $ 9 $ (30) $ 2,259  Trust preferred securities 2,590 - (931) 1,659  $ 4,870 $ 9 $ (961) $ 3,918     The amortized cost, unrecognized gains and losses, and fair value of investment securities held to maturity were as follows (in thousands):    Amortized Gross Unrecognized Fair  December 31, 2017 Cost Gains Losses Value  Residential government-sponsored mortgage-backed securities $ 11,500 $ 23 $ (77) $ 11,446  Obligations of states and political subdivisions 22,830 169 (56) 22,943  Trust preferred securities 3,205 165 (17) 3,353  Residential government-sponsored collateralized  mortgage obligations 8,727 - (99) 8,628  Government-sponsored agency securities 52,650 25 (1,448) 51,227  $ 98,912 $ 382 $ (1,697) $ 97,597   Amortized Gross Unrecognized Fair  December 31, 2016 Cost Gains Losses Value  Residential government-sponsored mortgage-backed securities $ 18,594 $ 308 $ (118) $ 18,784  Obligations of states and political subdivisions 12,706 53 (162) 12,597  Trust preferred securities 3,654 - (146) 3,508  Residential government-sponsored collateralized  mortgage obligations 2,371 - (54) 2,317  Government-sponsored agency securities 47,975 28 (1,865) 46,138  $ 85,300 $ 389 $ (2,345) $ 83,344  The amortized cost amounts are net of recognized OTTI.  During 2017, as part of our investment securities portfolio restructuring, $3.2 million of odd-lot residential government-sponsored mortgage-backed securities and $1.3 million of odd-lot residential government-sponsored collateralized mortgage obligations were sold. In addition, $5.7 million of callable agency investment securities were called during 2017. We recognized $257 thousand of gross gains on sales of investment securities and $2 thousand of gross losses on sales of investment securities during 2017 .  During 2016, we sold no investment securities.  In the second quarter of 2015, we transferred from our held to maturity portfolio all of the trust preferred investment securities and a non-government sponsored residential CMO investment security that had been other than temporarily impaired to the available for sale classification. We sold five of these trust preferred investment se curities and the non-government sponsored residential CMO investment security recognizing gains of $914 thousand and losses of $394 thousand. Due to the significant deterioration in these issuers’ creditworthiness which could not have been reasonably anticipated, we feel that our change in classification does not taint our intentions in regards to the remainder of our held to maturity portfolio. We consider this transfer to be isolated, nonrecurring and unusual for Southern National.                  The fair value and carrying amount, if different, of debt investment securities as of December 31, 2017, by contractual maturity were as follows (in thousands). Investment securities not due at a single maturity date are shown separately.     Available for Sale Held to Maturity  Amortized Amortized  Cost Fair Value Cost Fair Value  Due in one to five years $ 1,932 $ 1,911 $ 1,895 $ 1,892  Due in five to ten years 6,886 6,925 23,033 22,616  Due after ten years 17,613 17,520 53,757 53,015  Residential government-sponsored mortgage-backed securities 31,145 30,864 11,500 11,446  Residential government-sponsored collateralized mortgage obligations 51,521 50,766 8,727 8,628  Agency commercial mortgage-backed securities 28,263 27,898 - -  SBA pool securities 24,829 24,789 - -  Total $ 162,189 $ 160,673 $ 98,912 $ 97,597  Investment securities with a carrying amount of approximately $173.4 million and $73.9 million at December 31, 2017 and 2016, respectively, were pledged to secure public deposits, certain other deposits, a line of credit for advances from the FHLB of Atlanta, and repurchase agreements.  Southern National monitors the portfolio for indicators of OTTI. At December 31, 2017 and 2016, certain investment securities’ fair values were below cost. As outlined in the table below, there were 152 investment securities with fair values totaling approximately $196.9 million in the portfolio with the carrying value exceeding the estimated fair value that are considered temporarily impaired at December 31, 2017. Because the decline in fair value is attributable to changes in interest rates and market illiquidity, and not credit quality, and because we do not have the intent to sell these investment securities and it is likely that we will not be required to sell the investment securities before their anticipated recovery, management does not consider these investment securities to be other than temporarily impaired as of December 31, 2017. The following tables present information regarding investment securities in a continuous unrealized loss position as of December 31, 2017 and 2016 by duration of time in a loss position (in thousands):     December 31, 2017  Less than 12 months 12 Months or More Total  Available for Sale Fair value Unrealized Losses Fair value Unrealized Losses Fair value Unrealized Losses  Residential government-sponsored  mortgage-backed securities $ 30,336 $ (284) $ - $ - $ 30,336 $ (284)  Obligations of states and political subdivisions 4,642 (41) - - 4,642 (41)  Trust preferred securities 1,473 (18) 915 (184) 2,388 (202)  Residential government-sponsored collateralized  mortgage obligations 50,555 (756) - - 50,555 (756)  Government-sponsored agency securities 1,726 (21) - - 1,726 (21)  Agency commercial mortgage-backed securities 27,898 (365) - - 27,898 (365)  SBA pool securities 15,156 (108) - - 15,156 (108)  $ 131,786 $ (1,593) $ 915 $ (184) $ 132,701 $ (1,777)   Less than 12 months 12 Months or More Total  Held to Maturity Fair value Unrecognized Losses Fair value Unrecognized Losses Fair value Unrecognized Losses  Residential government-sponsored  mortgage-backed securities $ 3,409 $ (26) $ 2,986 $ (51) $ 6,395 $ (77)  Obligations of states and political subdivisions 7,918 (34) 1,782 (22) 9,700 (56)  Trust preferred securities - - 240 (17) 240 (17)  Residential government-sponsored collateralized  mortgage obligations 7,112 (46) 1,516 (53) 8,628 (99)  Government-sponsored agency securities 1,719 (2) 37,532 (1,446) 39,251 (1,448)  $ 20,158 $ (108) $ 44,056 $ (1,589) $ 64,214 $ (1,697)   December 31, 2016  Less than 12 months 12 Months or More Total  Available for Sale Fair value Unrealized Losses Fair value Unrealized Losses Fair value Unrealized Losses  Obligations of states and political subdivisions $ 1,706 $ (30) $ - $ - $ 1,706 $ (30)  Trust preferred securities - - 1,658 (931) 1,658 (931)  $ 1,706 $ (30) $ 1,658 $ (931) $ 3,364 $ (961)    Less than 12 months 12 Months or More Total  Held to Maturity Fair value Unrecognized Losses Fair value Unrecognized Losses Fair value Unrecognized Losses  Residential government-sponsored  mortgage-backed securities $ 10,238 $ (110) $ 457 $ (8) $ 10,695 $ (118)  Obligations of states and political subdivisions 3,578 (98) 1,065 (64) 4,643 (162)  Trust preferred securities - - 3,508 (146) 3,508 (146)  Residential government-sponsored collateralized  mortgage obligations 1,346 (27) 971 (27) 2,317 (54)  Government-sponsored agency securities 41,110 (1,865) - - 41,110 (1,865)  $ 56,272 $ (2,100) $ 6,001 $ (245) $ 62,273 $ (2,345)   As of December 31, 2017, we owned pooled trust preferred investment securities as follows (in thousands):     % of Previously  Current Recognized  Defaults and Cumulative  Ratings When Estimated Deferrals Other  Tranche Purchased Current Ratings Par Book Fair to Total Comprehensive  Security Level Moody's Fitch Moody's Fitch Value Value Value Collateral Loss (1)  Held to Maturity  ALESCO VII A1B Senior Aaa AAA Aa2 A $ 3,192 $ 2,948 $ 3,113 18% $ 226  MMCF III B Senior Sub A3 A- Ba1 BBB 261 257 240 32% 4  $ 3,453 $ 3,205 $ 3,353 $ 230   Cumulative OTTI  Available for Sale Related to  Other Than Temporarily Impaired: Credit Loss (2)  TPREF FUNDING II Mezzanine A1 A- Caa3 C $ 1,500 $ 1,099 $ 915 29% $ 400  ALESCO V C1 Mezzanine A2 A Caa1 C 2,150 1,491 1,473 14% 660  $ 3,650 $ 2,590 $ 2,388 $ 1,060   Total $ 7,103 $ 5,795 $ 5,741  (1) Pre-tax, and represents unrealized losses at date of transfer from available for sale to held to maturity, net of accretion (2) Pre-tax  Each of these investment securities has been evaluated for OTTI. In performing a detailed cash flow analysis of each investment security, Sonabank works with independent third parties to estimate expected cash flows and as sist with the evaluation of OTTI . The cash flow analyses performed included the following assumptions:  · 0.5% of the remaining performing collateral will default or defer per annum. · Recoveries of 9% with a two -year lag on all defaults and deferrals. · No prepayments for 10 years and then 1% per annum for the remaining life of the investment security. · Our investment securities have been modeled using the above assumptions by independent third parties using the forward LIBOR curve to discount projected cash flows to present values.  We recognized no OTTI charges during 2017, 2016 or 2015, respectively. The following table presents a roll forward of the credit losses on our investment securities previously classified as held to maturity and now classified as available for sale recognized in earnings for the years ended December 31, 2017, 2016 and 2015 (in thousands):     2017 2016 2015  Amount of cumulative other than temporary impairment  related to credit loss prior to January 1 $ 1,060 $ 1,060 $ 8,949  Reductions due to sales of investment securities for which an other than  temporary impairment was previously recognized - - (7,889)  Amount of cumulative other than temporary impairment  related to credit loss as of December 31 $ 1,060 $ 1,060 $ 1,060  Changes in accumulated other comprehensive (loss) by component for the years ended December 31, 2017, 2016 and 2015 are shown in the table below. All amounts are net of tax (in thousands).    Unrealized Holding  (Losses) on  For the year ended December 31, 2017 Available for Sale Held to Maturity  Securities Securities Total  Beginning balance $ (627) $ (162) $ (789)  Other comprehensive (loss) income before reclassifications (372) (246) (618)  Amounts reclassified from accumulated other comprehensive income - 255 255  Net current-period other comprehensive (loss) income (372) 9 (363)  Ending balance $ (999) $ (153) $ (1,152)    Unrealized Holding  (Losses) on  For the year ended December 31, 2016 Available for Sale Held to Maturity  Securities Securities Total  Beginning balance $ (440) $ (170) $ (610)  Other comprehensive (loss) income before reclassifications (187) 8 (179)  Net current-period other comprehensive (loss) income (187) 8 (179)  Ending balance $ (627) $ (162) $ (789)   Unrealized Holding  (Losses) on  For the year ended December 31, 2015 Available for Sale Held to Maturity  Securities Securities Total  Beginning balance $ (6) $ (3,014) $ (3,020)  Other comprehensive (loss) income before reclassifications (434) 21 (413)  Amounts reclassified from accumulated other comprehensive income - 2,823 2,823  Net current-period other comprehensive (loss) income (434) 2,844 2,410  Ending balance $ (440) $ (170) $ (610)   

LOANS

LOANS	12 Months Ended
	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
LOANS	   4 . LOANS AND ALLOWANCE FOR LOAN LOSSES  Loans, net of unearned income, consist of the following at year end (in thousands):     December 31, 2017 December 31, 2016  Loans secured by real estate:  Commercial real estate - owner occupied $ 401,847 $ 154,807  Commercial real estate - non-owner occupied 440,700 279,634  Secured by farmland 23,038 541  Construction and land development 197,972 91,067  Residential 1-4 family (1) 483,006 230,810  Multi- family residential 70,892 30,021  Home equity lines of credit (1) 152,829 29,203  Total real estate loans 1,770,284 816,083   Commercial loans 253,258 115,365  Consumer loans 39,374 856  Gross loans 2,062,916 932,304  Less deferred fees on loans (588) (1,889)  Loans, net of deferred fees $ 2,062,328 $ 930,415  (1) Includes $23.3 million and $28.2 million of loans as of December 31, 2017 and 2016, respectively, acquired in the GAB transaction covered under an FDIC loss-share agreement. The agreement covering single family loans expires in December 2019.  Accounting policy related to the allowance for loan losses is considered a critical policy given the level of estimation, judgment, and uncertainty in the levels of the allowance required to account for the inherent probable losses in the loan portfolio and the material effect such estimation, judgment, and uncertainty can have on the consolidated financial results.  On June 23, 2017, in connection with the merger with EVBS, Southern National acquired loans held for sale with a fair value of $19.7 million and loans held for investment with an unpaid principal balance of $1.05 billion and an est imated fair value of $1.03 billion, which created a fair value adjustment of $13.6 million at acquisition. Accretion of $2.8 million associated with these acquired loans held for investment was recognized in the twelve months ended December 31 , 2017.  As part of the GAB acquisition, the Bank and the FDIC entered into loss sharing agreement s on approximately $143.4 million ( contractual basis) of GAB’s assets. There were two agreements with the FDIC, one for single family loans which is a 10 -year agreement expiring in December 2019, and one for non-single family (commercial) assets which was a 5 -year agreement which expired in December 2014. The Bank will share in the losses on the loans and foreclosed loan collateral with the FDIC as specified in the loss sharing agreement s ; we refer to these assets collectively as “covered assets.” Loans that are not covered in the loss sharing agreement are referred to as “non-covered loans”. As of December 31, 2017, n on-covered loans included $3.9 million of loans acquired in the GAB acquisition , $19.2 million of loans acquired in the HarVest acquisition , $36.3 million acquired in the Prince Georges Federal Savings Bank (“PGFSB”) acquisition, and $942.8 million acquired in the EVBS acquisition. Covered loans are now considered an immaterial part of our overall loan portfolio and have been blended together with our non-covered loans for presentation purposes.  Accretable discount on the acquired performing loans in the EVBS, GAB, HarVest, and PGFSB acquisitions totaled $17.5 million and $6.5 million at December 31, 2017 and 2016, respectively.  For the three acquisitions subsequent to the GAB acquisition noted above, management sold the majority of the PCI loans immediately after closing of the acquisition.   Impaired loans for the portfolio were as follows (in thousands):     December 31, 2017 Total Loans  Unpaid  Recorded Principal Related  Investment (1) Balance Allowance  With no related allowance recorded:  Commercial real estate - owner occupied $ 767 $ 781 $ -  Commercial real estate - non-owner occupied (2) 766 830 -  Construction and land development 9,969 9,984 -  Commercial loans 6,035 12,847 -  Residential 1-4 family (3) 3,160 3,430 -  Other consumer loans - - -  Total $ 20,697 $ 27,872 $ -   With an allowance recorded:  Commercial real estate - owner occupied $ - $ - $ -  Commercial real estate - non-owner occupied (2) - - -  Construction and land development - - -  Commercial loans - - -  Residential 1-4 family (3) - - -  Other consumer loans - - -  Total $ - $ - $ -  Grand total $ 20,697 $ 27,872 $ -  (1) Recorded investment is after cumulative prior charge offs of $6.8 million. These loans also have aggregate SBA guarantees of $5.0 million. (2) Includes loans secured by farmland and multi-family residential loans. (3) Includes home equity lines of credit.     December 31, 2016 Total Loans  Unpaid  Recorded Principal Related  Investment (1) Balance Allowance  With no related allowance recorded:  Commercial real estate - owner occupied $ 5,583 $ 5,592 $ -  Commercial real estate - non-owner occupied (2) - - -  Construction and land development - - -  Commercial loans 3,002 3,603 -  Residential 1-4 family (3) 963 1,113 -  Other consumer loans - - -  Total $ 9,548 $ 10,308 $ -   With an allowance recorded:  Commercial real estate - owner occupied $ 688 $ 688 $ 150  Commercial real estate - non-owner occupied (2) - - -  Construction and land development - - -  Commercial loans 3,378 5,798 750  Residential 1-4 family (3) - - -  Other consumer loans - - -  Total $ 4,066 $ 6,486 $ 900  Grand total $ 13,614 $ 16,794 $ 900  (1) Recorded investment is after cumulative prior charge offs of $3.0 million. These loans also have aggregate SBA guarantees of $2.2 million. (2) Includes loans secured by farmland and multi-family residential loans. (3) Includes home equity lines of credit.  The following tables present the average recorded investment and interest income for impaired loans recognized by class of loans for the years ended December 31, 2017, 2016 and 2015 (in thousands):     For the Year Ended December 31, 2017 Total Loans  Average Interest  Recorded Income  Investment Recognized  With no related allowance recorded:  Commercial real estate - owner occupied $ 875 $ 34  Commercial real estate - non-owner occupied (1) 890 56  Construction and land development 9,942 139  Commercial loans 12,655 485  Residential 1-4 family (2) 3,398 91  Other consumer loans - -  Total $ 27,760 $ 805   With an allowance recorded:  Commercial real estate - owner occupied $ - $ -  Commercial real estate - non-owner occupied (1) - -  Construction and land development - -  Commercial loans - -  Residential 1-4 family (2) - -  Other consumer loans - -  Total $ - $ -  Grand total $ 27,760 $ 805  (1) Includes loans secured by farmland and multi-family residential loans. (2) Includes home equity lines of credit.    For the Year Ended December 31, 2016 Total Loans  Average Interest  Recorded Income  Investment Recognized  With no related allowance recorded:  Commercial real estate - owner occupied $ 6,454 $ 292  Commercial real estate - non-owner occupied (1) 103 3  Construction and land development - -  Commercial loans 2,888 54  Residential 1-4 family (2) 988 32  Other consumer loans - -  Total $ 10,433 $ 381   With an allowance recorded:  Commercial real estate - owner occupied $ 694 $ 31  Commercial real estate - non-owner occupied (1) - -  Construction and land development - -  Commercial loans 3,402 155  Residential 1-4 family (2) - -  Other consumer loans - -  Total $ 4,096 $ 186  Grand total $ 14,529 $ 567  (1) Includes loans secured by farmland and multi-family residential loans. (2) Includes home equity lines of credit.     For the Year Ended December 31, 2015 Total Loans  Average Interest  Recorded Income  Investment Recognized  With no related allowance recorded:  Commercial real estate - owner occupied $ 7,156 $ 297  Commercial real estate - non-owner occupied (1) 822 11  Construction and land development 89 -  Commercial loans 3,428 -  Residential 1-4 family (2) 1,501 26  Other consumer loans - -  Total $ 12,996 $ 334   With an allowance recorded:  Commercial real estate - owner occupied $ 2,259 $ 42  Commercial real estate - non-owner occupied (1) - -  Construction and land development 93 -  Commercial loans 3,488 213  Residential 1-4 family (2) 416 -  Other consumer loans - -  Total $ 6,256 $ 255  Grand total $ 19,252 $ 589  (1) Includes loans secured by farmland and multi-family residential loans. (2) Includes home equity lines of credit. The following tables present the aging of the recorded investment in past due loans by class of loans as of December 31, 2017 and 2016 (in thousands):     December 31, 2017 30 - 59 60 - 89  Days Days 90 Days Total Nonaccrual Loans Not Total  Past Due Past Due or More Past Due Loans Past Due Loans  Total loans:  Commercial real estate - owner occupied $ 687 $ - $ - $ 687 $ - $ 401,160 $ 401,847  Commercial real estate - non-owner  occupied (1) 138 50 - 188 - 534,442 534,630  Construction and land development 1,134 149 - 1,283 9,969 186,720 197,972  Commercial loans 496 - - 496 5,664 247,098 253,258  Residential 1-4 family (2) 2,926 361 - 3,287 2,392 630,156 635,835  Other consumer loans 57 1 - 58 - 39,316 39,374   Total $ 5,438 $ 561 $ - $ 5,999 $ 18,025 $ 2,038,892 $ 2,062,916     December 31, 2016 30 - 59 60 - 89  Days Days 90 Days Total Nonaccrual Loans Not Total  Past Due Past Due or More Past Due Loans Past Due Loans  Total loans:  Commercial real estate - owner occupied $ - $ - $ - $ - $ 637 $ 154,170 $ 154,807  Commercial real estate - non-owner  occupied (1) - - - - - 310,196 310,196  Construction and land development - - - - - 91,067 91,067  Commercial loans 1,349 - - 1,349 3,158 110,858 115,365  Residential 1-4 family (2) 1,232 95 - 1,327 850 257,836 260,013  Other consumer loans - - - - - 856 856   Total $ 2,581 $ 95 $ - $ 2,676 $ 4,645 $ 924,983 $ 932,304  (1) Includes loans secured by farmland and multi-family residential loans. (2) Includes home equity lines of credit.  Nonaccrual loans include SBA guaranteed amounts totaling $4.7 million and $2.2 million at December 31, 2017 and 2016, respectively. Activity in the allowance for loan and lease losses by class of loan for the years ended December 31, 2017, 2016 and 2015 is summarized below (in thousands):     Commercial Commercial  Real Estate Real Estate Construction Other  Owner Non-owner and Land Commercial 1-4 Family Consumer  Year ended December 31, 2017 Occupied Occupied (1) Development Loans Residential (2) Loans Unallocated Total  Allowance for loan losses:  Beginning balance $ 905 $ 1,484 $ 752 $ 3,366 $ 1,279 $ 78 $ 746 $ 8,610  Charge offs - (100) - (8,250) (369) (110) - (8,829)  Recoveries 132 299 1 538 17 4 - 991  Provision (347) (362) (61) 8,842 659 640 (746) 8,625  Ending balance $ 690 $ 1,321 $ 692 $ 4,496 $ 1,586 $ 612 $ - $ 9,397   Year ended December 31, 2016  Allowance for loan losses:  Beginning balance $ 1,185 $ 1,222 $ 865 $ 3,041 $ 1,408 $ 48 $ 652 $ 8,421  Charge offs (799) - (449) (3,370) (22) (322) - (4,962)  Recoveries 8 - 121 96 10 4 - 239  Provision 511 262 215 3,599 (117) 348 94 4,912  Ending balance $ 905 $ 1,484 $ 752 $ 3,366 $ 1,279 $ 78 $ 746 $ 8,610   Year ended December 31, 2015  Allowance for loan losses:  Beginning balance $ 855 $ 1,123 $ 1,644 $ 2,063 $ 1,339 $ 53 $ 337 $ 7,414  Adjustments (3) - - - - (17) - - (17)  Charge offs (1,067) - - (1,174) (413) (19) - (2,673)  Recoveries 18 18 139 91 259 1 - 526  Provision 1,379 81 (918) 2,061 240 13 315 3,171  Ending balance $ 1,185 $ 1,222 $ 865 $ 3,041 $ 1,408 $ 48 $ 652 $ 8,421  (1) Includes loans secured by farmland and multi-family residential loans. (2) Includes home equity lines of credit. (3) Represents the portion of increased expected losses which is covered by the loss sharing agreement with the FDIC.  The following table presents the balance in the allowance for loan losses and the recorded investment in loans by portfolio segment and based on impairment method as of December 31, 2017 and 2016 (in thousands):      Commercial Commercial  Real Estate Real Estate Construction Other  Owner Non-owner and Land Commercial 1-4 Family Consumer  Occupied Occupied (1) Development Loans Residential (2) Loans Unallocated Total  December 31, 2017  Ending allowance balance attributable to loans:  Individually evaluated for impairment $ - $ - $ - $ - $ - $ - $ - $ -  Collectively evaluated for impairment 690 1,321 692 4,496 1,586 612 - 9,397  Total ending allowance $ 690 $ 1,321 $ 692 $ 4,496 $ 1,586 $ 612 $ - $ 9,397   Loans:  Individually evaluated for impairment $ 767 $ 766 $ 9,969 $ 6,035 $ 3,160 $ - $ - $ 20,697  Collectively evaluated for impairment 401,080 533,864 188,003 247,223 632,675 39,374 - 2,042,219  Total ending loan balances $ 401,847 $ 534,630 $ 197,972 $ 253,258 $ 635,835 $ 39,374 $ - $ 2,062,916   December 31, 2016  Ending allowance balance attributable to loans:  Individually evaluated for impairment $ 150 $ - $ - $ 750 $ - $ - $ - $ 900  Collectively evaluated for impairment 755 1,484 752 2,616 1,279 78 746 7,710  Total ending allowance $ 905 $ 1,484 $ 752 $ 3,366 $ 1,279 $ 78 $ 746 $ 8,610   Loans:  Individually evaluated for impairment $ 6,271 $ - $ - $ 6,380 $ 963 $ - $ - $ 13,614  Collectively evaluated for impairment 148,536 310,196 91,067 108,985 259,050 856 - 918,690  Total ending loan balances $ 154,807 $ 310,196 $ 91,067 $ 115,365 $ 260,013 $ 856 $ - $ 932,304    (1) Includes loans secured by farmland and multi-family residential loans. (2) Includes home equity lines of credit.  Troubled Debt Restructurings  A modification is classified as a troubled debt restructuring (“TDR”) if both of the following exist: (1) the borrower is experiencing financial difficulty and (2) the Bank has granted a concession to the borrower. The Bank determines that a borrower may be experiencing financial difficulty if the borrower is currently delinquent on any of its debt, or if the Bank is concerned that the borrower may not be able to perform in accordance with the current terms of the loan agreement in the foreseeable future. Many aspects of the borrower’s financial situation are assessed when determining whether they are experiencing financial difficulty, particularly as it relates to commercial borrowers due to the complex nature of the loan structure, business/industry risk and borrower/guarantor structures. Concessions may include the reduction of an interest rate at a rate lower than current market rate for a new loan with similar risk, extension of the maturity date, reduction of accrued interest, or principal forgiveness. When evaluating whether a concession has been granted, the Bank also considers whether the borrower has provided additional collateral or guarantors and whether such additions adequately compensate the Bank for the restructured terms, or if the revised terms are consistent with those currently being offered to new loan customers. The assessments of whether a borrower is experiencing (or is likely to experience) financial difficulty and whether a concession has been granted is subjective in nature and management’s judgment is required when determining whether a modification is a TDR.  Although each occurrence is unique to the borrower and is evaluated separately, for all portfolio segments, TDRs are typically modified through reduction in interest rates, reductions in payments, changing the payment terms from principal and interest to interest only, and/or extensions in term maturity.  During the years ending December 31, 2017 and 2016, there were no loans modified in TDRs. One TDR which had been modified in 2013 defaulted during the second quarter of 2015. This loan, in the amount of $672 thousand, was current as of December 31, 2017.  Credit Quality Indicators  Through its system of internal controls, Southern National evaluates and segments loan portfolio credit quality on a quarterly basis using regulatory definitions for Special Mention, Substandard and Doubtful. Special Mention loans are considered to be criticized. Substandard and Doubtful loans are considered to be classified. Southern National had no loans classified Doubtful at December 31, 2017 or 2016.  Special Mention loans are loans that have a potential weakness that deserves management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the loan or of the institution’s credit position.  Substandard loans may be inadequately protected by the current net worth and paying capacity of the obligor or of the collateral pledged if any. Loans so classified have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt. They are characterized by the distinct possibility that the institution will sustain some loss if the deficiencies are not corrected.  Doubtful loans have all the weaknesses inherent in those classified as substandard, with the added characteristic that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions, and values, highly questionable and improbable.  As of December 31, 2017 and 2016, and based on the most recent analysis performed, the risk category of loans by class of loans is as follows (in thousands):     December 31, 2017 Total Loans  Special  Mention Substandard (3) Pass Total  Commercial real estate - owner occupied $ 4,178 $ 1,678 $ 395,991 $ 401,847  Commercial real estate - non-owner occupied (1) 5,705 830 528,095 534,630  Construction and land development 128 9,969 187,875 197,972  Commercial loans 5,936 6,035 241,287 253,258  Residential 1-4 family (2) 1,323 3,935 630,577 635,835  Other consumer loans 162 - 39,212 39,374   Total $ 17,432 $ 22,447 $ 2,023,037 $ 2,062,916   December 31, 2016 Total Loans  Special  Mention Substandard (3) Pass Total  Commercial real estate - owner occupied $ - $ 6,271 $ 148,536 $ 154,807  Commercial real estate - non-owner occupied (1) - - 310,196 310,196  Construction and land development - - 91,067 91,067  Commercial loans 28 6,380 108,957 115,365  Residential 1-4 family (2) - 963 259,050 260,013  Other consumer loans - - 856 856  Total $ 28 $ 13,614 $ 918,662 $ 932,304    (1) Includes loans secured by farmland and multi-family residential loans. (2) Includes home equity lines of credit.  (3) Includes SBA guarantees of $5.0 million and $2.2 million as of December 31, 2017 and 2016, respectively. The amount of foreclosed residential real estate property held at December 31, 2017 and 2016 wa s $3.3 million and $3.4 million, respectively. The recorded investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure was $939 thousand and $1.8 million at December 31, 2017 and 2016, respectively.  Purchased Loans  The following table presents the carrying amount of purchased impaired and non-impaired loans from the EVBS acquisition as of December 31, 2017 (in thousands):     December 31, 2017  Purchased Purchased  Impaired Non-impaired  Loans Loans Total  Commercial real estate (1) $ 5,788 $ 418,170 $ 423,958  Construction and land development - 85,036 85,036  Commercial loans 3,598 112,693 116,291  Residential 1-4 family (2) 1,255 282,702 283,957  Other consumer loans - 33,539 33,539  Total $ 10,641 $ 932,140 $ 942,781  (1) Includes owner occupied and non-owner occupied as well as loans secured by farmland and multi-family residential loans. (2) Includes home equity lines of credit.  Changes in the carrying amount and accretable yield for purchased impaired and non-impaired loans from the EVBS acquisition were as follows for the year ended December 31, 2017 (in thousands):     December 31, 2017  Purchased Impaired Purchased Non-impaired  Carrying Carrying  Accretable Amount Accretable Amount  Yield of Loans Discount of Loans  Balance at beginning  of period $ - $ - $ - $ -  Additions 398 11,329 14,783 1,020,653  Accretion (83) 83 (2,669) 2,669  Adjustment-transfer to  OREO - - - (43)  Payments received - (771) - (91,139)  Balance at end of  the period $ 315 $ 10,641 $ 12,114 $ 932,140               The following table presents the carrying amount of purchased impaired and non-impaired loans from the GAB acquisition as of December 31, 2017 and 2016 (in thousands):    December 31, 2017 December 31, 2016  Purchased Purchased Purchased Purchased  Impaired Non-impaired Impaired Non-impaired  Loans Loans Total Loans Loans Total  Commercial real estate (1) $ 1,050 $ 2,257 $ 3,307 $ 1,080 $ 3,630 $ 4,710  Construction and land development - - - - - -  Commercial loans 189 280 469 193 347 540  Residential 1-4 family (2) - 23,339 23,339 - 28,180 28,180  Other consumer loans - 67 67 - 14 14  Total $ 1,239 $ 25,943 $ 27,182 $ 1,273 $ 32,171 $ 33,444   (1) Includes owner occupied and non-owner occupied as well as loans secured by farmland and multi-family residential loans. (2) Includes home equity lines of credit.  The FDIC indemnification on the GAB residential mortgages and home equity lines of credit expires in December 2019 .  Changes in the carrying amount and accretable yield for purchased impaired and non-impaired loans from the GAB acquisition were as follows for the years ended December 31, 2017 and 2016 (in thousands):     December 31, 2017 December 31, 2016  Purchased Impaired Purchased Non-impaired Purchased Impaired Purchased Non-impaired  Carrying Carrying Carrying Carrying  Accretable Amount Accretable Amount Accretable Amount Accretable Amount  Yield of Loans Discount of Loans Yield of Loans Discount of Loans  Balance at beginning  of the period $ - $ 1,273 $ 3,761 $ 32,171 $ - $ 1,444 $ 4,597 $ 38,758  Additions - - - - - - - -  Accretion - - (886) 892 - - (1,085) 1,085  Reclassifications  from nonaccretable  balance - - 230 - - - 269 -  Adjustment-transfer to  OREO - - - - - - (20) (169)  Payments received - (34) - (7,120) - (171) - (7,503)  Balance at end of  the period $ - $ 1,239 $ 3,105 $ 25,943 $ - $ 1,273 $ 3,761 $ 32,171             The following table presents the carrying amount of purchased impaired and non-impaired loans from the HarVest acquisition as of December 31, 2017 and 2016 (in thousands):     December 31, 2017 December 31, 2016  Purchased Purchased Purchased Purchased  Impaired Non-impaired Impaired Non-impaired  Loans Loans Total Loans Loans Total  Commercial real estate (1) $ - $ 9,162 $ 9,162 $ 258 $ 10,150 $ 10,408  Construction and land development 396 2,869 3,265 488 2,996 3,484  Commercial loans - 1,688 1,688 - 2,062 2,062  Residential 1-4 family (2) 792 4,290 5,082 818 6,221 7,039  Other consumer loans - - - - 2 2  Total $ 1,188 $ 18,009 $ 19,197 $ 1,564 $ 21,431 $ 22,995  (1) Includes owner occupied and non-owner occupied as well as loans secured by farmland and multi-family residential loans. (2) Includes home equity lines of credit.                Changes in the carrying amount and accretable yield for purchased impaired and non-impaired loans from the HarVest acquisition were as follows for the years ended December 31, 2017 and 2016 (in thousands):      December 31, 2017 December 31, 2016  Purchased Impaired Purchased Non-impaired Purchased Impaired Purchased Non-impaired   Carrying Carrying Carrying Carrying  Accretable Amount Accretable Amount Accretable Amount Accretable Amount  Yield of Loans Discount of Loans Yield of Loans Discount of Loans  Balance at beginning  of the period $ - $ 1,564 $ 662 $ 21,431 $ - $ 1,688 $ 858 $ 27,878  Additions - - - - - - - -  Accretion - - (184) 184 - - (196) 139  Payments received - (376) - (3,606) - (124) - (6,586)  Balance at end of  the period $ - $ 1,188 $ 478 $ 18,009 $ - $ 1,564 $ 662 $ 21,431  The following table presents the carrying amount of purchased impaired and non-impaired loans from the PGFSB acquisition as of December 31, 2017 and 2016 (in thousands):     December 31, 2017 December 31, 2016  Purchased Purchased Purchased Purchased  Impaired Non-impaired Impaired Non-impaired  Loans Loans Total Loans Loans Total  Commercial real estate (1) $ 198 $ 1,997 $ 2,195 $ 225 $ 2,638 $ 2,863  Construction and land development - 1,216 1,216 355 860 1,215  Commercial loans - 39 39 - 116 116  Residential 1-4 family (2) 348 32,357 32,705 - 38,018 38,018  Other consumer loans - 100 100 - 142 142  Total $ 546 $ 35,709 $ 36,255 $ 580 $ 41,774 $ 42,354  (1) Includes owner occupied and non-owner occupied as well as loans secured by farmland and multi-family residential loans. (2) Includes home equity lines of credit.   Changes in the carrying amount and accretable yield for purchased impaired and non-impaired loans from the PGFSB acquisition were as follows for the year ended December 31, 2017 and 2016 (in thousands):     December 31, 2017 December 31, 2016  Purchased Impaired Purchased Non-impaired Purchased Impaired Purchased Non-impaired  Carrying Carrying Carrying Carrying  Accretable Amount Accretable Amount Accretable Amount Accretable Amount  Yield of Loans Discount of Loans Yield of Loans Discount of Loans  Balance at beginning  of the period $ - $ 580 $ 2,096 $ 41,774 $ - $ 703 $ 2,462 $ 51,263  Additions - - - - - - - -  Accretion - - (333) 333 - - (366) 365  Payments received - (34) - (6,398) - (123) - (9,854)  Balance at end of  the period $ - $ 546 $ 1,763 $ 35,709 $ - $ 580 $ 2,096 $ 41,774 

FAIR VALUE

FAIR VALUE	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
FAIR VALUE	5 . FAIR VALUE  ASC 820-10 establishes a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The standard describes three levels of inputs that may be used to measure fair value:  Level 1: Quoted prices (unadjusted) f or identical assets or liabilities in active markets that the entity has the ability to access as of the measurement date  Level 2: Significant other observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data  Level 3: Significant unobservable inputs that reflect a reporting entity’s own assumptions about the assumptions that market participants would use in pricing an asset or liability  The following is a description of the valuation methodologies used for instruments measured at fair value, as well as the general classification of such instruments pursuant to the valuation hierarchy:  Assets Measured on a Recurring Basis :  Investment Securities Available for Sale  Where quoted prices are available in an active market, investment securities are classified within Level 1 of the valuation hierarchy. Level 1 investment securities would include highly liquid government bonds, mortgage products and exchange traded equities. If quoted market prices are not available, then fair values are estimated by using pricing models, quoted prices of investment securities with similar characteristics, or discounted cash flow. Level 2 investment securities would include U.S. agency securities, mortgage-backed securities, obligations of states and political subdivisions and certain corporate, asset-backed and other securities. In certain cases where there is limited activity or less transparency around inputs to the valuation, investment securities are classified within Level 3 of the valuation hierarchy. Currently, all of Southern National’s available for sale debt investment securities are considered to be Level 2 investment securities.  Assets measured at fair value on a recurring basis are summarized below:     Fair Value Measurements Using  Significant  Quoted Prices in Other Significant  Active Markets for Observable Unobservable  Total at Identical Assets Inputs Inputs  (dollars in thousands) December 31, 2017 (Level 1) (Level 2) (Level 3)  Financial assets:  Available for sale investment securities  Residential government-sponsored  mortgage-backed securities $ 30,864 $ - $ 30,864 $ -  Obligations of states and political subdivisions 18,727 - 18,727 -  Corporate securities 2,015 - 2,015 -  Trust preferred securities 2,388 - 2,388 -  Residential government-sponsored collateralized  mortgage obligations 50,766 - 50,766 -  Government-sponsored agency securities 3,226 - 3,226 -  Agency commercial mortgage-backed securities 27,898 - 27,898 -  SBA pool securities 24,789 - 24,789 -  $ 160,673 $ - $ 160,673 $ -      Fair Value Measurements Using  Significant  Quoted Prices in Other Significant  Active Markets for Observable Unobservable  Total at Identical Assets Inputs Inputs  (dollars in thousands) December 31, 2016 (Level 1) (Level 2) (Level 3)  Financial assets:  Available for sale investment securities  Obligations of states and political subdivisions $ 2,259 $ - $ 2,259 $ -  Trust preferred securities 1,659 - 1,659 -  $ 3,918 $ - $ 3,918 $ -  Assets and Liabilities Measured on a Non-recurring Basis:  Impaired Loans  Generally, we measure the impairment for impaired loans considering the fair value of the loan’s collateral (if the loan is collateral dependent). Fair value of the loan’s collateral is determined by an independent appraisal or e valuation less estimated costs related to selling the collateral. In some cases appraised value is net of costs to sell. Estimated selling costs range from 6% to 10% of collateral valuation at December 31, 2017 and 2016. Fair value is classified as Level 3 in the fair value hierarchy. L oans identified as impaired totaled $ 20.7 million (including SBA guarantees of $5.0 million) as of December 31, 2017 with $0 allocated allowance for loan losses compared to a carrying amount of $13.6 million (including SBA guarantees of $2.2 million ) with an allocated allowance for loan losses totaling $900 thousand at December 31, 2016 .  Assets held for sale  In connection with the merger with EVBS, SNBV acquired four properties that were either former EVBS administrative locations or previously anticipated to be future EVBS administrative locations. Assets held for sale are measured at fair value less cost to sell, based on appraisals conducted by an independent, licensed appraiser outside of the Company using observable market data. If the fair value is significantly adjusted due to differences in the comparable properties, or is discounted by the Company because of marketability, then the fair value is considered Level 3. Assets held for sale are measured at fair value on a non-recurring basis. Subsequent fair value adjustments are recorded in the period incurred and included in other noninterest expense on the consolidated statements of income .  Other Real Estate Owned  OREO is evaluated at the time of acquisition and recorded at fair value as determined by independent appraisal or evaluation less cost to sell. In some cases appraised value is net of costs to sell. Selling costs have been in the range from 5.0% to 7.6% of collateral valuation at December 31, 2017 and 2016. Fair value is classified as Level 3 in the fair value hierarchy. OREO is further evaluated quarterly for any additional impairment. At December 31, 2017 and 2016, the total amount of OREO w as $7.6 million and $8.6 million, respectively.  Assets measured at fair value on a non-recurring basis are summarized below:     Fair Value Measurements Using  Significant  Quoted Prices in Other Significant  Active Markets for Observable Unobservable  Total at Identical Assets Inputs Inputs  (dollars in thousands) December 31, 2017 (Level 1) (Level 2) (Level 3)  Impaired loans:  Commercial real estate - owner occupied $ 767 $ - $ - $ 767  Commercial real estate - non-owner occupied (1) 766 - - 766  Construction and land development 9,969 - - 9,969  Commercial loans 6,035 - - 6,035  Residential 1-4 family (2) 3,160 - - 3,160  Assets held for sale 1,927 - - 1,927  Other real estate owned:  Commercial real estate - owner occupied 1,060 - - 1,060  Construction and land development 3,229 - - 3,229  Residential 1-4 family (2) 3,288 - - 3,288      Fair Value Measurements Using  Significant  Quoted Prices in Other Significant  Active Markets for Observable Unobservable  Total at Identical Assets Inputs Inputs  (dollars in thousands) December 31, 2016 (Level 1) (Level 2) (Level 3)  Impaired loans:  Commercial real estate - owner occupied $ 6,121 $ - $ - $ 6,121  Commercial loans 5,630 - - 5,630  Residential 1-4 family (2) 963 - - 963  Other real estate owned:  Commercial real estate - owner occupied 1,110 - - 1,110  Commercial real estate - non-owner occupied (1) 237 - - 237  Construction and land development 3,863 - - 3,863  Residential 1-4 family (2) 3,407 - - 3,407  (1) Includes loans secured by farmland and multi-family residential loans. (2) Includes home equity lines of credit.    F air Value of Financial Instruments  The carrying amount, estimated fair values and fair value hierarchy levels (previously defined) of financial instruments were as follows (in thousands):    December 31, 2017 December 31, 2016  Fair Value Carrying Fair Carrying Fair  Hierarchy Level Amount Value Amount Value  Financial assets:  Cash and cash equivalents Level 1 $ 25,463 $ 25,463 $ 47,392 $ 47,392  Securities available for sale Level 2 160,673 160,673 3,918 3,918  Securities held to maturity Level 2 98,912 97,597 85,300 83,344  Stock in Federal Reserve Bank and Federal  Home Loan Bank n/a 26,775 n/a 7,929 n/a  Equity investment in mortgage affiliate Level 3 4,723 4,723 4,629 4,629  Preferred investment in mortgage affiliate Level 3 3,305 3,305 2,555 2,555  Net loans Level 3 2,052,931 2,058,779 921,805 935,258  Accrued interest receivable Level 2 & Level 3 8,073 8,073 3,202 3,202  FDIC indemnification asset Level 3 1,353 309 2,111 528  Financial liabilities:  Demand deposits Level 1 649,067 649,067 124,779 124,779  Money market and savings accounts Level 1 517,031 517,031 182,590 182,590  Certificates of deposit Level 3 699,058 694,368 605,613 605,394  Securities sold under agreements  to repurchase Level 1 15,468 15,468 - -  FHLB short term advances Level 1 335,615 335,615 95,000 95,000  Junior subordinated debt Level 2 9,534 12,043 - -  Senior subordinated notes Level 2 47,128 58,163 - -  Accrued interest payable Level 1 & Level 3 2,273 2,273 1,190 1,190    Carrying amount is the estimated fair value for cash and cash equivalents (including federal funds sold), equity investment in mortgage affiliate, preferred investment in mortgage affiliate, accrued interest receivable and payable, demand deposits, savings accounts, money market accounts, securities sold under agreements to repurchase, short-term debt, and variable rate loans that reprice frequently and fully. For fixed rate loans or deposits and for variable rate loans with infrequent repricing or repricing limits, fair value is based on discounted cash flows using current market rates applied to the estimated life. A discount for liquidity risk was not considered necessary in estimating the fair value of loans. It was not practicable to determine the fair value of Federal Reserve Bank and Federal Home Loan Bank stock due to restrictions placed on its transferability. Fair value of long-term debt is based on current rates for similar financing. The fair value of the FDIC indemnification asset was determined by discounting estimated future cash flows using the long-term risk free rate plus a premium and represents the present value of our current expectation for recoveries from the FDIC on covered loans. The fair value of off-balance-sheet items is not considered material. The fair value of loans is not presented on an exit price basis.

BANK PREMISES AND EQUIPMENT

BANK PREMISES AND EQUIPMENT	12 Months Ended
	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
BANK PREMISES AND EQUIPMENT	6 . BANK PREMISES AND EQUIPMENT    Bank premises and equipment as of December 31, 2017 and 2016 were as follows (in thousands):     2017 2016  Land $ 8,133 $ 2,261  Land improvements 2,027 -  Building and improvements 33,928 5,842  Leasehold improvements 3,217 2,428  Furniture and equipment 20,022 4,332  Construction in progress 41 -  67,368 14,863  Less accumulated depreciation and amortization 31,580 6,636  Bank premises and equipment, net $ 35,788 $ 8,227  Future minimum rental payments required under non-cancelable operating leases for bank premises that have initial or remaining terms in excess of one year as of December 31, 2017 are as follows (in thousands):    2018 $ 2,554  2019 2,208  2020 1,767  2021 1,102  2022 1,074  Thereafter 3,141  Total $ 11,846 Some leases contain options to extend for periods of up to 6 years. Rental expense for 2017, 20 16 and 2015 was $2.2 million, $2.0 million and $2.0 million, respectively .

GOODWILL AND INTANGIBLE ASSETS

GOODWILL AND INTANGIBLE ASSETS	12 Months Ended
	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND INTANGIBLE ASSETS	7 . GOODWILL AND INTANGIBLE ASSETS  Goodwill  Southern National has recorded $100.6 million and $10.5 million of goodwill at December 31, 2017 and 2016, respectively. Goodwill is evaluated for impairment on an annual basis or more frequently if events or circumstances warrant. Goodwill is primarily related to the 2017 acquisition of EVBS, which increased goodwill by $90.1 million . Our annual assessment timing is during the third calendar quarter. For the 201 7 assessment, we performed a qualitative assessment to determine if it was more likely than not that the fair value of our single reporting unit is less than its carrying amount. We concluded that the fair value of our single reporting unit exceeded its carrying amount and that it was not necessary to perform the two-step test pursuant to ASC 350-20. Our qualitative assessment considered many factors including, but not limited to, our actual and projected operating performance and profitability, as well as consideration of recent bank merger and acquisition transaction metrics . No impairment was indicated in 2017 or 2016 .           Intangible Assets  Intangible assets were as follows at year end (in thousands):     December 31, 2017  Gross Carrying Accumulated Net Carrying  Value Amortization Value  Amortizable core deposit intangibles $ 17,503 $ (7,449) $ 10,054   December 31, 2016  Gross Carrying Accumulated Net Carrying  Value Amortization Value  Amortizable core deposit intangibles $ 7,477 $ (6,603) $ 874  Estimated amortization expense of intangibles for the years ended December 31 were as follows (in thousands):     2018 $ 1,471  2019 1,438  2020 1,377  2021 1,377  2022 1,337  Thereafter 3,203  Total $ 10,203 

FDIC INDEMNIFICATION ASSET

FDIC INDEMNIFICATION ASSET	12 Months Ended
	Dec. 31, 2017
Fdic Indemnification Asset [Abstract]
FDIC INDEMNIFICATION ASSET	8 . FDIC INDEMNIFICATION ASSET  The indemnification asset represents our estimate of future expected recoveries under the FDIC loss sharing arrangement for covered loans acquired in the GAB acquisition in 2009 . The estimated fair value of the indemnification asset was $8.8 million at December 4, 2009, the date of acquisition. The following table presents changes in the indemnification asset for the periods indicated (in thousands):    2017 2016  Balance as of January 1 $ 2,111 $ 2,922  Payments from FDIC (46) (18)  Amortization (712) (793)  Balance as of December 31 $ 1,353 $ 2,111  During 2017 , and based on the actual historical losses on the loan pools over the previous 24- month period, expected losses on the acquired GAB loans (the covered loans) were lower than previously forecasted which results in a lower expected recovery from t he FDIC. As of December 31, 2017 , we expect to recover $309 thousand from the FDIC under the indemnification agreement. The difference bet ween the carrying amount of $1.4 million and the estimated recovery is being amortized over the remaining life of the indemnification agreement or the expected life of the loans, whichever is shorter.  There were two agreements with the FDIC, one for sin gle family assets which is a 10 - year agreement expiring in December 2019, and one for non-single family (commercial) assets which was a 5 - year agreement which expired in December 2014. The current overstatement is due to improvements in the loss estimates in the single family covered loans.     

DEPOSITS

DEPOSITS	12 Months Ended
	Dec. 31, 2017
Deposits [Abstract]
DEPOSITS	9. DEPOSITS  The aggregate amount of time deposits in denominations of $250 thousand or more at December 31, 2017 and 2016 was $171. 0 million and $147.6 million, respectively.  At December 31, 2017, the scheduled maturities of time deposits are as follows (in thousands):      2018 $ 402,078  2019 190,455  2020 49,378  2021 34,325  2022 22,822  Total $ 699,058  The following table sets forth the maturities of certificates of deposit of $250 thousand and over as of December 31, 2017 (in thousands):     Within 3 to 6 6 to 12 Over 12  3 Months Months Months Months Total  $ 26,041 $ 23,576 $ 28,589 $ 92,807 $ 171,013  As of December 31, 2017, we had brokered certificates of deposit in the amount of $109.8 million and brokered money market deposits of $17.0 million. At December 31, 2016, we had brokered certificates of deposit in the amount of $66.5 million, and we had brokered money market deposits of $14.2 million.  For our deposit agreements with certain customers, we hold the collateral in a segregated custodial account. We are required to maintain adequate collateral levels. In the event the collateral fair value falls below stipulated levels, we will pledge additional securities. We closely monitor collateral levels to ensure adequate levels are maintained, while mitigating the potential risk of over-collateralization.

SECURITIES SOLD UNDER AGREEMENT

SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE AND OTHER SHORT-TERM BORROWINGS	12 Months Ended
	Dec. 31, 2017
Securities Sold Under Agreements To Repurchase And Other Short Term Borrowings [Abstract]
SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE AND OTHER SHORT-TERM BORROWINGS	10. SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE AND OTHER SHORT-TERM BORROWINGS  Other short-term borrowings can consist of FHLB of Atlanta overnight advances, other FHLB advances maturing within one year, federal funds purchased and securities sold under agreements to repurchase (“repo”) that mature within one year, which are secured transactions with customers. During the second quarter of 2016, the Company discontinued offering repo accounts. However, repo accounts totaling $7.6 million were assumed on June 23, 2017 in the merger with EVBS. During the third quarter of 2017 the Company determined that it will continue to offer repo accounts , and the balance at December 31, 2017 was $15.5 million.  At December 31, 201 7 and 201 6 , we have pledged callable agency securities, residential government-sponsored mortgage-backed securities and collateralized mortgage obligations with a carrying value of $24.2 million and $13.6 million, respectively, to customers who require collateral for overnight repurchase agreements and other deposits.              Other short-term borrowings consist of the following (in thousands):    December 31,  2017 2016 2015   FHLB overnight advances $ 56,860 $ 50,000 $ 49,000  Other short-term FHLB advances maturing 6/27/2018 10,000 - -  Other short-term FHLB advances maturing 6/20/2018 27,200 - -  Other short-term FHLB advances maturing 6/14/2018 10,000 - -  Other short-term FHLB advances maturing 6/13/2018 80,640 - -  Other short-term FHLB advances maturing 6/12/2018 10,000 - -  Other short-term FHLB advances maturing 3/28/2018 30,000 - -  Other short-term FHLB advances maturing 3/14/2018 80,640 - -  Other short-term FHLB advances maturing 3/13/2018 30,275 - -  Other short-term FHLB advances maturing 3/27/2017 - 10,000 -  Other short-term FHLB advances maturing 5/4/2017 - 10,000 -  Other short-term FHLB advances maturing 6/5/2017 - 10,000 -  Other short-term FHLB advances maturing 6/19/2017 - 5,000 -  Other short-term FHLB advances maturing 12/15/2017 - 10,000 -  Other short-term FHLB advances maturing 11/4/2016 - - 10,000  Securities sold under agreements to repurchase 15,468 - 10,381  Total $ 351,083 $ 95,000 $ 69,381   Weighted average interest rate at year end 1.50% 0.86% 0.51%   For the periods ended December 31, 2017, 2016 and 2015:  Average outstanding balance $ 177,983 $ 66,864 $ 34,673  Average interest rate during the year 1.24% 0.74% 0.76%   Maximum month-end outstanding balance $ 351,083 $ 95,000 $ 69,381  Each FHLB advance is payable at its maturity date, with a prepayment penalty for fixed rate advances paid off earlier than maturity. Residential 1-4 family mortgage loans in the amount of approximately $323.3 million and $128.9 million were pledged as collateral for FHLB advances as of December 31, 2017 and 2016 , respectively. Home equity lines of credit ( “ HELOCs ” ) in the amount of approximately $82.0 million and $17.5 million were pledged as collateral for FH LB advances at December 31, 2017 and 2016 , respectively. Commercial mortgage loans in the amount of approximately $124.4 million and $172.6 million were pledged as collateral for FHLB advances as of December 31, 2017 and 201 6 , respectively. Investment securities in the a mount of $26.0 million and $46.7 million were pledged as collateral for FHLB advances a t December 31, 2017 and 2016 , re spectively. At December 31, 2017 , Sonabank had available collateral to borrow an additional $314.2 million from the FHLB.

JUNIOR SUBORDINATED DEBT AND SE

JUNIOR SUBORDINATED DEBT AND SENIOR SUBORDINATED NOTES	12 Months Ended
	Dec. 31, 2017
Debt Disclosure [Abstract]
JUNIOR SUBORDINATED DEBT AND SENIOR SUBORDINATED NOTES	11. JUNIOR SUBORDINATED DEBT AND SENIOR SUBORDINATED NOTES  In connection with our merger with EVBS, the Company assumed $10.3 million (fair value adjustment of $801 thousand) of trust preferred securities that were issued on September 17, 2003 and placed through the Trust in a pooled underwriting totaling approximately $650 million. The trust issuer has invested the total proceeds from the sale of the trust preferred securities in Floating Rate Junior Subordinated Deferrable Interest Debentures (“Junior Subordinated Debt”) issued by EVBS. The trust preferred securities pay cumulative cash distributions quarterly at a variable rate per annum, reset quarterly, equal to the 3-month LIBOR plus 2.95% . As of December 31, 2017 and 2016, the interest rate was 4.55% and 3.94% , respectively. The dividends paid to holders of the trust preferred securities, which are recorded as interest expense, are deductible for income tax purposes. The trust preferred securities have a mandatory redemption date of September 17, 2033, and became subject to varying call provisions beginning on September 17, 2008. The Company has fully and unconditionally guaranteed the trust preferred securities through the combined operation of the Junior Subordinated Debt and other related documents. The Company’s obligation under the guarantee is unsecured and subordinate to senior and subordinated indebtedness of the Company. The trust preferred securities may be included in Tier 1 capital for regulatory capital adequacy determination purposes up to 25% of Tier 1 capital after its inclusion. At December 31 , 2017, all of the trust preferred securities qualified as Tier 1 capital. Subject to certain exceptions and limitations, the Company is permitted to elect from time to time to defer regularly scheduled interest payments on its outstanding Junior Subordinated Debt relating to its trust preferred securities. If the Company defers interest payments on the Junior Subordinated Debt for more than 20 consecutive quarters, the Company would be in default under the governing agreements for such notes and the amount due under such agreements would be immediately due and payable. On January 20, 2017, Southern National completed the sale of $27.0 million of its fixed-to-floating rate Subordinated Notes due 2027 (the “SNBV Senior Subordinated Notes”). The SNBV Senior Subordinated Notes will initially bear interest at 5.875% per annum until January 31, 2022; thereafter, the SNBV Senior Subordinated Notes will be payable at an annual floating rate equal to three-month LIBOR plus a spread of 3.95% until maturity or early redemption. At December 31 , 2017, all of the SNBV Senior Subordinated Notes qualified as Tier 2 capital. At December 31 , 2017, the remaining unamortized debt issuance costs related to the SNBV Senior Subordinated Notes totaled $854 thousand.  Also in connection with our merger with EVBS, the Company assumed the Senior Subordinated Note Purchase Agreement previously entered into by EVBS on April 22, 2015 with certain institutional accredited investors pursuant to which EVBS sold $20.0 million (fair value adjustment of $1.9 million) in aggregate principal amount of its 6.50% Fixed-to-Floating Rate Subordinated Notes due 2025 (the “EVBS Senior Subordinated Notes”) to the investors at a price equal to 100% of the aggregate principal amount of the EVBS Senior Subordinated Notes. The EVBS Senior Subordinated Notes bear interest at an annual rate of 6.50%, payable semi-annually in arrears on May 1 and November 1 of each year ending on May 1, 2020. From and including May 1, 2020 to, but excluding, the maturity date, the EVBS Senior Subordinated Notes will bear interest at an annual rate, reset quarterly, equal to LIBOR determined on the determination date of the applicable interest period plus 502 basis points, payable quarterly in arrears on February 1, May 1, August 1 and November 1 of each year, beginning on August 1, 2020. The Company may, at its option, redeem, in whole or in part, the EVBS Senior Subordinated Notes as early as May 1, 2020, and any partial redemption would be made pro rata among all of the holders. At December 31 , 2017 all of the EVBS Senior Subordinated Notes qualified as Tier 2 capital. 

INCOME TAXES

INCOME TAXES	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
INCOME TAXES	1 2 . INCOME TAXES  Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting and income tax purposes. Net deferred tax assets at December 31, 2017 and 2016 consist primarily of the following: (in thousands):     2017 2016  Deferred tax assets:  Allowance for loan losses $ 2,100 $ 2,997  Organization costs 78 72  Unearned loan fees and other 987 656  Other real estate owned write-downs 794 945  Other than temporary impairment charge 235 369  Net unrealized loss on investment securities available for sale 367 406  Purchase accounting 3,411 934  Federal net operating loss carryforward 4,845 -  Federal AMT credit carryforward 1,137 -  Federal low income housing credit carryforward 2,386 -  Deferred compensation 1,114 878  Other 712 871  Total deferred tax assets 18,166 8,128  Deferred tax liabilities:  FDIC indemnification asset 300 735  Depreciation 963 613  Total deferred tax liabilities 1,263 1,348  Net deferred tax assets $ 16,903 $ 6,780  No valuation allowance was deemed necessary on deferred tax assets in 2017 or 2016. Management believes that the realization of the deferred tax assets is more likely than not based on the expectation that Southern National will generate the necessary taxable income in future periods.  We have no unrecognized tax benefits and do not anticipate any increase in unrecognized tax benefits during the next twelve months. Should the accrual of any interest or penalties relative to unrecognized tax benefits be necessary, it is our policy to record such accruals in our income tax accounts; no such accruals existed as of December 31, 2017, 2016 or 2015. Southern National and its subsidiaries file a consolidated U.S. federal income tax return, and Southern National files a Virginia state income tax return. Sonabank files a Maryland state income tax return. These returns are subject to examination by taxing authorities for all years after 2013.  The provision for income taxes consists of the following for the years ended December 31, 2017, 2016 and 2015 (in thousands):    2017 2016 2015  Current tax expense  Federal $ 3,145 $ 4,781 $ 2,367  State 316 285 168  Total current tax expense 3,461 5,066 2,535   Deferred tax benefit  Federal 10,234 28 2,123  State (548) 1 9  Total deferred tax expense 9,686 29 2,132  Total income tax expense $ 13,147 $ 5,095 $ 4,667  The income tax expense differed from the amount of income tax determined by applying the U.S. Federal income tax rate of 34% to pretax income for the years ended December 31, 2017, 2016 and 2015 due to the following (in thousands):     2017 2016 2015  Computed expected tax expense at statutory rate $ 5,294 $ 5,238 $ 4,745  Reduction in tax expense resulting from:  Income from bank-owned life insurance (316) (238) (216)  Other, net 234 95 138  Transaction costs 724 - -  Provisional tax adjustment related to reduction in U.S.  federal statutory income tax rate 7,211 - -  Income tax expense $ 13,147 $ 5,095 $ 4,667   Income tax expense for 2017 was impacted by the adjustment of our deferred tax assets and liabilities related to the reduction in the U.S. federal statutory income tax rate to 21% under the Tax Cuts and Jobs Act, which was enacted on December 22, 2017. As a result of the new law, which is more fully discussed below, we recognized additional income tax expense totaling $7.2 million as reported in the rate change line item in the table above.  The Tax Cuts and Jobs Act was enacted on December 22, 2017. Among other things, the new law (i) establishes a new, flat corporate federal statutory income tax rate of 21%, (ii) eliminates the corporate alternative minimum tax and allows the use of any such carryforwards to offset regular tax liability for any taxable year, (iii) limits the deduction for net interest expense incurred by U.S. corporations, (iv) allows businesses to immediately expense, for tax purposes, the cost of new investments in certain qualified depreciable assets, (v) eliminates or reduces certain deductions related to meals and entertainment expenses, (vi) modifies the limitation on excessive employee remuneration to eliminate the exception for performance-based compensation and clarifies the definition of a covered employee and (vii) limits the deductibility of deposit insurance premiums. The Tax Cuts and Jobs Act also significantly changes U.S. tax law related to foreign operations, however, such changes do not currently impact us.  A s a result of the enactment of the Tax Cuts and Jobs Act on December 22, 2017, we remeasured our deferred tax assets and liabilities based upon the newly enacted U.S. statutory federal income tax rate of 21% , which is the tax rate at which these assets and liabilities are expected to reverse in the future. Notwithstanding the foregoing, we are still analyzing certain aspects of the new law and refining our calculations, which could affect the measurement of these assets and liabilities or give rise to new deferred tax amounts. Nonetheless, we recognized a provisional net tax expense related to the remeasurement of our deferred tax assets and liabilities totaling $ 7.2 million in the fourth quarter of 2017 .

EMPLOYEE BENEFITS

EMPLOYEE BENEFITS	12 Months Ended
	Dec. 31, 2017
Compensation and Retirement Disclosure [Abstract]
EMPLOYEE BENEFITS	 1 3 . EMPLOYEE BENEFITS  Southern National has a 401(k) plan that allows employees to make pre-tax contributions for retirement. The 401(k) plan provides for discretionary matching contributions by Southern National . Expense for 2017, 2016 and 2015 was $433 thousand, $132 thousand and $108 thousand, respectively.  A deferred compensation plan that covers two executive officers was established in 2007. Under the plan, the Bank pays each participant, or their beneficiary, the amount of compensation deferred plus accrued interest over 10 years, beginning with the individual’s retirement. A liability is accrued for the obligation under these plans.  In connection with our merger with EVBS, Southern National assumed the EVBS Supplemental Executive Retirement Plan, which had two participants. The normal retirement benefits for both participants became fully vested as a result of the merger. The completion of the merger, however, did not accelerate the time of payment under the EVBS Supplemental Executive Retirement Plan. For one participant, benefits are to be paid in equal monthly installments over a 15-year period. There is no pre-retirement benefit, but a beneficiary can be named to receive the remaining payments for the 15-year period after benefits have commenced. For the other participant, benefits are to be paid in equal monthly installments over a 200-month period. There is no pre-retirement benefit, but a beneficiary can be named to receive the remaining payments for the 200-month period after benefits have commenced.  The expense incurred for the deferred compensation plans in 2017, 2016 and 2015 was $415 thousand, $495 thousand and $403 thousand, respectively. The deferred compensation plan liability was $5.0 million and $2.5 million as of December 31, 2017 and 2016, respectively.

STOCK- BASED COMPENSATION

STOCK- BASED COMPENSATION	12 Months Ended
	Dec. 31, 2017
Disclosure Of Compensation Related Costs, Share-Based Payments [Abstract]
STOCK-BASED COMPENSATION	1 4 . STOCK-BASED COMPENSATION  In 2004, the Board of Directors adopted a stock option plan that authorized the reservation of up to 302,500 shares of common stock and provided for the granting of stock options to certain directors, officers and employees. The 2010 Stock Awards and Incentive Plan (the “2010 Plan”) was approved by the Board of Directors in January 2010 and approved by the stockholders at the Annual Meeting in April 2010. The 2010 Plan authorized the reservation of an additional 700,000 shares of common stock for the granting of stock awards. The options granted to officers and employees are incentive stock options and the options granted to non-employee directors are non-qualified stock options. The purpose of the plan is to afford key employees an incentive to remain in the employ of Southern National and to assist in the attracting and retaining of non-employee directors by affording them an opportunity to share in Southern National’s future success. Under the plan, the option’s price cannot be less than the fair market value of the stock on the grant date. The maximum term of the options is ten years and options granted may be subject to a graded vesting schedule.  At the June 21, 2017 Annual Meeting of Stockholders of Southern National, the 2017 Equity Compensation Plan (the “2017 Plan”) was approved as recommended by the Board of Directors. The 2017 Plan replaces the 2010 Plan and has a maximum number of 750,000 shares reserved for issuance. The purpose of the 2017 Plan is to promote the success of the Company by providing greater incentive to employees, non-employee directors, consultants and advisors to associate their personal interests with the long-term financial success of the Company, including its subsidiaries, and with growth in stockholder value, consistent with the Company’s risk management practices . Because the 2017 Plan was approved, shares under the 2004 stock-option plan or 2010 Plan will no longer be awarded.  Southern National granted no regular options during 2017, but did issue 22,559 options under the 2017 Plan in connection with the merger with EVBS which options were previously outstanding under the EVBS 2003 Stock Incentive Plan . Immediately prior to t he effective time of the m erger, each option to purchase shares of EVBS common stock granted under an EVBS stock plan vested and was converted into and became an option to purchase shares of common stock of SNBV (each, an “Assumed Option”), which was adjusted (i) by multiplying the number of shares of common stock that could be purchased under the Assumed Option by the 0.6313 e xchange r atio and rounding down to the nearest share and (ii) by dividing the per share exercise price of the option by the 0.6313 e xchange r atio and rounding up to the nearest cent. SNBV assumed each Assumed Option in accordance with the terms of the EVBS stock plan and award agreement by which it is evidenced .  Southern National granted 136,000 options during 201 6 . The fair value of each option granted is estimated on the date of grant using the Black-Scholes options-pricing model . The following weighted-average assumptions were used to value options granted in the years indicated:    2016 2015  Expected life 10 years 10 years  Expected volatility 14.16% 14.71%  Risk-free interest rate 1.62% 2.26%  Weighted average fair value per option granted $ 0.63 $ 0.51  Dividend yield 4.44% 5.51%  A summary of the activity in the stock option plan for 2017 follows:    Weighted  Weighted Average Aggregate  Average Remaining Intrinsic  Exercise Contractual Value  Shares Price Term (in thousands)  Options outstanding, beginning of period 782,200 $ 9.56  Granted - -  Options issued in connection with EVBS merger 22,559 24.54  Forfeited (27,042) 21.44  Exercised (62,750) 8.84  Options outstanding, end of period 714,967 $ 9.83 5.6 $ 4,553   Exercisable at end of period 379,557 $ 8.74 4.1 $ 3,099  Stock-based compensation expense associated with stock options was $237 thousand, $260 thousand and $331 thousand for the years ended December 31, 2017, 2016 and 2015, respectively. As of December 31, 2017, unrecognized compensation expense associated with stock option s was $214 thousand, which is expected to be recognized over a weighted average period of 2.0 years .  In the third quarter of 2017, 2,800 shares of restricted stock with a price of $15.78 were granted to certain officers of Southern National under the 2017 Plan and are subject to time vesting in two equal annual installments on July 31, 2018 and 2019, respectively . These shares are included in the total shares issue d and outstanding at December 31 , 2017. Restricted stock compensation expense totaled $14 thousand for the year ended December 31, 2017 and total unrecognized restricted stock compensation expense totaled $30 thousand at December 31, 2017 and will be amortized over the remaining vesting time period.

FINANCIAL INSTRUMENTS WITH OFF-

FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK	12 Months Ended
	Dec. 31, 2017
Financial Instruments With Off Balance Sheet Risk [Abstract]
FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK	1 5 . FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK  Southern National is a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit , standby letters of credit and guarantees of credit card accounts sold by EVBS premerger . These instruments involve elements of credit and funding risk in excess of the amount recognized in the consolidated balance sheet. Letters of credit are written conditional commitments issued by Southern National to guarantee the performance of a customer to a third party. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loans to customers. We had letters of credit outstanding totaling $15.2 million and $6.4 million as of December 31, 2017 and 2016, respectively.  Our exposure to credit loss in the event of nonperformance by the other party to the financial instruments for commitments to extend credit and letters of credit is based on the contractual amount of these instruments. We use the same credit policies in making commitments and conditional obligations as we do for on-balance sheet instruments. Unless noted otherwise, we do not require collateral or other security to support financial instruments with credit risk.  Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments are made predominately for adjustable rate loans, and generally have fixed expiration dates of up to three months or other termination clauses and usually require payment of a fee. Since many of the commitments may expire without being completely drawn upon, the total commitment amounts do not necessarily represent future cash requirements. We evaluate each customer's creditworthiness on a case-by-case basis.  At December 31, 20 17 and 2016 , we had unfunded lines of credit and undisbursed construction loan funds totaling $361.7 million and $135.8 million, respectively. Virtually all of our unfunded lines of credit and undisbursed c onstruction loan funds are variable rate.  Premerger, EVBS sold its credit card portfolio. With that sale, EVBS guaranteed the credit card accounts of certain customers to the bank that issues the cards. In connection with the merger with EVBS, Southern National now is the guarantor. The fair value of guarantees of credit card accounts previously sold is based on the estimated cost to settle the obligations with the counterparty and are not considered significant as of December 31 , 2017 .                     

EARNINGS PER SHARE

EARNINGS PER SHARE	12 Months Ended
	Dec. 31, 2017
Earnings Per Share [Abstract]
EARNINGS PER SHARE	                   16. EARNINGS PER SHARE  The following is a reconciliation of the denominators of the basic and diluted EPS computations for 2017, 2016 and 2015 (dollars in thousands, except per share data):    Weighted  Average  Income Shares Per Share  (Numerator) (Denominator) Amount  For the year ended December 31, 2017  Basic EPS $ 2,425 18,391 $ 0.13  Effect of dilutive stock options and warrants - 281 -  Diluted EPS $ 2,425 18,672 $ 0.13  For the year ended December 31, 2016  Basic EPS $ 10,312 12,252 $ 0.84  Effect of dilutive stock options and warrants - 175 -  Diluted EPS $ 10,312 12,427 $ 0.83  For the year ended December 31, 2015  Basic EPS $ 9,289 12,224 $ 0.76  Effect of dilutive stock options and warrants - 106 -  Diluted EPS $ 9,289 12,330 $ 0.75  There were 434,385 anti-dilutive options during 2017 . All unexercised warrants expired in 2017 . There were 678,721 anti-dilutive options and warrants during 2016 , and there were 643,164 anti-dilutive options and warrants during 2015. 

REGULATORY MATTERS

REGULATORY MATTERS	12 Months Ended
	Dec. 31, 2017
Regulatory Matters [Abstract]
REGULATORY MATTERS	1 7 . REGULATORY MATTERS  Southern National and its subsidiary bank are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory - and possibly additional discretionary - actions by regulators that, if undertaken, could have a direct material effect on our financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action ( “ PCA ” ), we must meet specific capital guidelines that involve quantitative measures of our assets, liabilities and certain off-balance sheet items as calculated under regulatory accounting practices. The capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings and other factors. At December 31, 2017 and 2016, the most recent regulatory notifications categorized the Bank as well capitalized under regulatory framework for PCA.  Quantitative measures established by regulation to ensure capital adequacy require Southern National to maintain minimum amounts and ratios of Total and Tier I capital (as defined in the regulations) to average assets (as defined). Management believes, as of December 31, 20 17 , that Southern National meets all capital adequacy requirements to which it is subject.               The capital amounts and ratios for Southern National and Sonabank at year end are presented in the following table (in thousands):    Required  For Capital To Be Categorized as  Actual Adequacy Purposes (1) Well Capitalized (2)  Amount Ratio Amount Ratio Amount Ratio  December 31, 2017  Southern National  Common equity tier 1 capital ratio $ 211,399 10.53% $ 90,300 4.50% n/a n/a  Tier 1 risk-based capital ratio 220,430 10.98% 120,399 6.00% n/a n/a  Total risk-based capital ratio 276,827 13.80% 160,533 8.00% n/a n/a  Leverage ratio 220,430 8.82% 100,022 4.00% n/a n/a  Sonabank  Common equity tier 1 capital ratio $ 256,615 12.79% $ 90,282 4.50% $ 130,407 6.50%  Tier 1 risk-based capital ratio 256,615 12.79% 120,375 6.00% 160,500 8.00%  Total risk-based capital ratio 266,012 13.26% 160,500 8.00% 200,626 10.00%  Leverage ratio 256,615 10.26% 100,040 4.00% 125,051 5.00%   December 31, 2016  Southern National  Common equity tier 1 capital ratio $ 116,076 12.69% $ 41,171 4.50% n/a n/a  Tier 1 risk-based capital ratio 116,076 12.69% 54,894 6.00% n/a n/a  Total risk-based capital ratio 124,686 13.63% 73,193 8.00% n/a n/a  Leverage ratio 116,076 10.56% 43,965 4.00% n/a n/a  Sonabank  Common equity tier 1 capital ratio $ 114,779 12.55% $ 41,151 4.50% $ 59,440 6.50%  Tier 1 risk-based capital ratio 114,779 12.55% 54,868 6.00% 73,157 8.00%  Total risk-based capital ratio 123,389 13.49% 73,157 8.00% 91,447 10.00%  Leverage ratio 114,779 10.45% 43,947 4.00% 54,934 5.00%  (1) When fully phased-in on January 1, 2019, the Basel III capital rules include a capital conservation buffer of 2.5% that is added on top of each of the minimum risk-based capital ratios noted above. Implementation began on January 1, 2016 at the 0.625% level and will increase each subsequent January 1, until it reaches 2.5% on January 1, 2019. (2) PCA provisions are not applicable at the bank holding company level.  Southern National’s principal source of funds for dividend payments is dividends received from the Bank. Banking regulations limit the amount of dividends that may be paid without prior approval of regulatory agencies. Under these regulations, the amount of dividends that may be paid in any calendar year is limited to the current year’s net profits, combined with the retained net profits of the preceding two years, subject to the capital requirements described above.

PARENT COMPANY FINANCIAL INFORM

PARENT COMPANY FINANCIAL INFORMATION	12 Months Ended
	Dec. 31, 2017
Condensed Financial Information Of Parent Company Only Disclosure [Abstract]
PARENT COMPANY FINANCIAL INFORMATION	18 . PARENT COMPANY FINANCIAL INFORMATION  Condensed financial information of Southern National Bancorp of Virginia, Inc. follows (in thousands):    CONDENSED BALANCE SHEETS  DECEMBER 31,   2017 2016  ASSETS  Cash $ 4,535 $ 856  Investment in subsidiaries 369,266 125,047  Other assets 6,405 441  Total assets $ 380,206 $ 126,344   LIABILITIES AND STOCKHOLDERS' EQUITY  Liabilities:  Junior subordinated debt $ 9,534 $ -  Senior subordinated notes 47,128 -  Other liabilities 772 -  Total liabilities 57,434 -  Stockholders' equity:  Common stock 239 123  Additional paid in capital 304,932 104,884  Retained earnings 18,753 22,126  Accumulated other comprehensive loss (1,152) (789)  Total stockholders' equity 322,772 126,344  Total liabilities and stockholders' equity $ 380,206 $ 126,344                   CONDENSED STATEMENTS OF INCOME  FOR THE YEARS ENDED DECEMBER 31,   2017 2016 2015  Income:  Cash dividends received from subsidiary $ 4,900 $ 3,600 $ 6,300  Interest on deposit with subsidiary 3 - -  Total income 4,903 3,600 6,300  Expenses:  Interest on junior subordinated debt 253 - -  Interest on senior subordinated notes 2,194 - -  Merger expenses 2,812 - -  Other operating expenses 478 153 204  Total expenses 5,737 153 204  (Loss) income before income tax benefit and equity in  undistributed net income of subsidiary (834) 3,447 6,096  Income tax benefit (1,196) (52) (69)  Equity in undistributed net income of subsidiary 2,063 6,813 3,124  Net income $ 2,425 $ 10,312 $ 9,289       CONDENSED STATEMENTS OF CASH FLOWS  FOR THE YEARS ENDED DECEMBER 31,   2017 2016 2015  Operating activities:  Net income $ 2,425 $ 10,312 $ 9,289  Adjustments to reconcile net income to net cash and  cash equivalents (used in) provided by operating activities:  Equity in undistributed net income of subsidiary (6,963) (10,413) (9,424)  Other, net 4,046 219 262  Net cash and cash equivalents (used in) provided by operating activities (492) 118 127  Investing activities:  Increase in investment in subsidiary (22,000) - -  Dividend from subsidiary 4,900 3,600 6,300  Acquisition of Eastern Virginia Bankshares, Inc. (10) - -  Net cash and cash equivalents (used in) provided by investing activities (17,110) 3,600 6,300  Financing activities:  Issuance of subordinated notes, net of cost 26,075 - -  Issuance of common stock 1,004 236 707  Repurchase of common stock - - (721)  Cash dividends paid on common stock (5,798) (3,921) (6,359)  Net cash and cash equivalents provided by (used in) financing activities 21,281 (3,685) (6,373)  Increase in cash and cash equivalents 3,679 33 54  Cash and cash equivalents at beginning of period 856 823 769  Cash and cash equivalents at end of period $ 4,535 $ 856 $ 823 

ACCUMULATED OTHER COMPREHENSIVE

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)	12 Months Ended
	Dec. 31, 2017
Statement Of Other Comprehensive Income [Abstract]
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)	 19. ACCUMULATED OTHER COMPREHENSIVE (LOSS)  The following is a summary of the accumulated other comprehensive (loss) balances, net of tax (in thousands):     Balance at Current Period Balance at  December 31, 2016 Change December 31, 2017  Unrealized (loss) on investment securities available for sale $ (627) $ (372) $ (999)  Unrecognized gain on investment securities held to maturity for which other  than temporary impairment charges have been taken 311 - 311  Unrealized (loss) on investment securities available  for sale transferred to held to maturity (473) 9 (464)   Total $ (789) $ (363) $ (1,152) 

RELATED PARTY TRANSACTIONS

RELATED PARTY TRANSACTIONS	12 Months Ended
	Dec. 31, 2017
Related Party Transactions [Abstract]
RELATED PARTY TRANSACTIONS	  20. RELATED PARTY TRANSACTIONS  Sonabank has entered into loan transactions with STM in the ordinary course of business on substantially the same terms, including interest rates and collateral, as those prevailing at the same time for comparable transactions with other customers, and did not, in the opinion of management, involve more than normal credit risk.  The following table summarizes the changes in the loan amount outstanding with STM during the periods indicated (in thousands):    2017 2016  Balance at January 1 $ 8,126 $ 10,438  Principal advances 238,503 149,725  Acquired from EVBS 13,044 -  Principal paid (233,906) (152,037)  Balance at December 31 $ 25,767 $ 8,126  Sonabank has established with STM underwriting guidelines under which it will purchase residential construction only, construction loans that convert to permanent, and permanent loans primarily in its Virginia and Maryland footprint from STM. These will be largely loans that do not conform to FNMA or FHLMC standards because of size or acreage. We purchased loans in an aggregate amount of $102.1 million during 201 7 , and $77.4 million during 2016 from STM .  During the year, officers, directors, principal shareholders, and their affiliates (related parties) were customers of and had transactions with the Company in the ordinary course of business. In management’s opinion, these transactions were made on substantially the same terms, including interest rates and collateral, as those prevailing at the time for comparable loans to non-related customers and did not involve more than the normal risk of collectability or present other unfavorable features.     Loan activity to related parties is as follows (in thousands):     2017  Balance at January 1 $ -  Acquired from EVBS 7,871  Principal advances 2,498  Principal paid (1,020)  Balance at December 31 $ 9,349  Sonabank has also entered into deposit transactions with its related parties including STM , all of which are under the same terms as other customers. The aggregate amount of these deposit accounts were $ 15.6 million and $5.9 million as of December 31, 2017 and 2016, respectively.

QUARTERLY FINANCIAL DATA (UNAUD

QUARTERLY FINANCIAL DATA (UNAUDITED)	12 Months Ended
	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
QUARTERLY FINANCIAL DATA (UNAUDITED)	2 1 . QUARTERLY FINANCIAL DATA (UNAUDITED)     Interest Net Interest Income (Loss) Net Earnings (Loss) Per Share  Income Income Before Taxes Income (Loss) Basic Diluted   (dollars in thousands, except per share amounts)  2017  First quarter $ 12,545 $ 9,891 $ 3,221 $ 2,054 $ 0.17 $ 0.16  Second quarter 14,249 11,205 (3,804) (2,842) (0.21) (0.21)  Third quarter 28,811 23,850 6,463 4,374 0.18 0.18  Fourth quarter 27,965 22,971 9,692 (1,161) (0.05) (0.05)   2016  First quarter $ 11,673 $ 9,712 $ 3,555 $ 2,566 $ 0.21 $ 0.21  Second quarter 12,291 10,174 4,182 2,789 0.23 0.23  Third quarter 12,619 10,373 4,140 2,765 0.23 0.22  Fourth quarter 12,364 10,055 3,530 2,192 0.18 0.18 

LOW INCOME HOUSING TAX CREDITS

LOW INCOME HOUSING TAX CREDITS	12 Months Ended
	Dec. 31, 2017
Low Income Housing Tax Credits [Abstract]
LOW INCOME HOUSING TAX CREDITS	2 2. LOW INCOME HOUSING TAX CREDITS  The merger with EVBS on June 23, 2017 included investments in four separate housing equity funds that remain outstanding at December 31, 201 7 . The general purpose of these funds is to encourage and assist participants in investing in low-income residential rental properties located in the Commonwealth of Virginia, develop and implement strategies to maintain projects as low-income housing, deliver Federal Low Income Housing Credits to investors, allocate tax losses and other possible tax benefits to investors, and to preserve and protect project assets. The investments in these funds were recorded as other assets on the consolidated balance sheets and were carried at $1.9 million and $0 at December 31, 201 7 and 201 6 , respectively. These investments and related tax benefits have expected terms through 203 3 , with the majority maturing by 2027. Tax credits and other tax benefits recognized related to these investments during the years ended December 31, 201 7 and 201 6 were $227 thousand and $0 , respectively. Total projected tax credits to be received for 2017 are $154 thousand, which is based on the most recent quarterly estimates received from the funds. Additional capital calls ex pected for the funds totaled $949 thousand and $0 at December 31, 201 7 and 201 6 , respectively, and are included in other liabilities on the consolidated balance sheets. 

ORGANIZATION AND SIGNIFICANT 30

ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES (Policies)	12 Months Ended
	Dec. 31, 2017
Organization And Significant Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation  The consolidated financial statements include the accounts of Southern National and its subsidiaries Sonabank and EVB Statutory Trust I (the “Trust”). Significant inter-company accounts and transactions have been eliminated in consolidation. Southern National consolidates subsidiaries in which it holds, directly or indirectly, more than 50 percent of the voting rights or where it exercises control. Entities where Southern National holds 20 to 50 percent of the voting rights, or has the ability to exercise significant influence, or both, are accounted for under the equity method. Southern National has an interest in one affiliate, Southern Trust Mortgage, LLC (“STM”), which it accounts for as an equity method investment. In addition, Southern National owns the Trust which is an unconsolidated subsidiary. The junior subordinated debt owed to the Trust is reported as a liability of Southern National.
Use of Estimates	Use of Estimates  The preparation of the consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from these estimates. Material estimates that are particularly susceptible to significant change in the near term include: the determination of the allowance for loan losses, the carrying value of investment securities, other than temporary impairment of investment securities, the valuation of goodwill and intangible assets, fair value measurements related to assets acquired and liabilities assumed from business combinations, the FDIC indemnification asset, other real estate owned (“OREO”) and deferred tax assets.
Business Combinations	Business Combinations  U.S. GAAP requires that the acquisition method of accounting be used for all business combinations and that an acquirer be identified for each business combination. Under U.S. GAAP, the acquirer is the entity that obtains control of one or more businesses in the business combination, and the acquisition date is the date the acquirer achieves control. U.S. GAAP requires that the acquirer recognize the fair value of assets acquired, liabilities assumed, and any non ‑controlling interest in the acquiree at the acquisition date. 
Investment Securities	Investment Securities  Debt securities that Southern National has the positive intent and ability to hold to maturity are classified as held-to-maturity and carried at amortized cost.  Securities classified as available for sale are those debt securities that may be sold in response to changes in interest rates, liquidity needs or other similar factors. Securities available for sale are carried at fair value, with unrealized gains or losses net of deferred taxes, included in accumulated other comprehensive income (loss) in stockholders' equity.  Purchased premiums and discounts are recognized in interest income using the interest method over the terms of the securities without anticipating prepayments, except for mortgage-backed securities where prepayments are anticipated. Gains and losses on the sale of investment securities are recorded on the settlement date and are determined using the specific identification method.  Southern National purchases amortizing investment securities in which the underlying assets are residential mortgage loans subject to prepayments. The actual principal reduction on these assets varies from the expected contractual principal reduction due to principal prepayments resulting from the borrowers’ election to refinance the underlying mortgage based on market and other conditions. The purchased premiums and discounts associated with these assets are amortized or accreted to interest income over the estimated life of the related assets. The estimated life is calculated by projecting future prepayments and the resulting principal cash flows until maturity. Prepayment rate projections utilize actual prepayment speed experience and available market information on like-kind instruments. The prepayment rates form the basis for income recognition of premiums and discounts on the related assets. Changes in prepayment estimates may cause the earnings recognized on these assets to vary over the term that the assets are held, creating volatility in the net interest margin. Prepayment rate assumptions are monitored and updated monthly to reflect actual activity and the most recent market projections.  Management evaluates investment securities for other-than-temporary impairment (“OTTI”) on at least a quarterly basis, and more frequently when economic or market conditions warrant such an evaluation. For investment securities in an unrealized loss position, management considers the extent and duration of the unrealized loss, and the financial condition and near-term prospects of the issuer. Management also assesses whether it intends to sell, or it is more likely than not that it will be required to sell, an investment security in an unrealized loss position before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the entire difference between amortized cost and fair value is recognized as impairment through earnings. For debt securities that do not meet the aforementioned criteria, the amount of impairment is split into two components as follows: 1) OTTI related to credit loss, which must be recognized in the income statement and 2) OTTI related to other factors, which is recognized in other comprehensive income. The credit loss is defined as the difference between the present value of the cash flows expected to be collected and the amortized cost basis. For equity securities, the entire amount of impairment is recognized through earnings.  In order to determine OTTI for purchased beneficial interests that, on the purchase date, were not highly rated, Southern National compares the present value of the remaining cash flows as estimated at the preceding evaluation date to the current expected remaining cash flows. OTTI is deemed to have occurred if there has been an adverse change in the remaining expected future cash flows.
Loans	Loans  Southern National provides mortgage, commercial and consumer loans to customers. A substantial portion of the loan portfolio is represented by loans secured by real estate throughout its market area. The ability of Southern National’s debtors to honor their contracts is in varying degrees dependent upon the real estate market conditions and general economic conditions in this area.  Loans that management has the intent and ability to hold for the foreseeable future or until maturity or pay-off are reported at their outstanding unpaid principal balances adjusted for the allowance for loan losses, purchased premiums and discounts and any deferred loan fees or costs on originated loans. Interest income is accrued on the unpaid principal balance. Loan origination fees, net of certain direct origination costs, are deferred and recognized as an adjustment of the related loan yield using the interest method without anticipating prepayments.  As part of the Greater Atlantic Bank (“GAB”) acquisition, the Bank and the Federal Deposit Insurance Corporation (“FDIC”) entered into a loss sharing agreement on approximately $143.4 million (cost basis) of GAB’s assets. The Bank will share in the losses on the loans and foreclosed loan collateral with the FDIC as specified in the loss sharing agreement; we refer to these assets collectively as “covered assets.” The indemnification against losses in the GAB commercial portfolio ended in December 2014. The FDIC indemnification on the GAB residential mortgages and the GAB HELOCS continues until December 2019. Loans that are not covered in the loss sharing agreement with the FDIC are referred to as “non-covered loans.”  The accrual of interest on all loans is discontinued at the time the loan is 90 days delinquent unless the credit is well secured and in process of collection. In all cases, loans are placed on nonaccrual status or charged-off at an earlier date if collection of principal and interest is considered doubtful.  All interest accrued but not collected for loans that are placed on nonaccrual status or charged-off is reversed against interest income. The interest on these loans is accounted for on the cash-basis or cost-recovery method, until qualifying for return to accrual status. Loans are returned to accrual status when all the principal and interest amounts contractually due are brought current and future payments are reasonably assured.  Most of Southern National’s business activity is with customers located within Virginia and Maryland. Therefore, our exposure to credit risk is significantly affected by changes in the economy in those areas. We are not dependent on any single customer or group of customers whose insolvency would have a material adverse effect on operations.  Southern National has purchased, primarily through acquisitions, individual loans and groups of loans, some of which have shown evidence of credit deterioration since origination. These purchased loans are recorded at fair value such that there is no carryover of the seller’s allowance for loan losses. After acquisition, losses are recognized by an increase in the allowance for loan losses. Purchased credit-impaired (“PCI”) loans are accounted for using the expected cash flow methodology, and purchased performing loans are accounted for using the contractual cash flow methodology.  Such purchased loans are accounted for individually or aggregated into pools of loans based on common risk characteristics such as, credit score, loan type, and date of origination. Southern National estimates the amount and timing of expected cash flows for each PCI loan or pool, and the expected cash flows in excess of fair value are recorded as interest income over the remaining life of the loan or pool (accretable yield). The excess of the loans’ or pool’s contractual principal and interest over expected cash flows is not recorded (nonaccretable difference).  Over the life of the loan or pool, expected cash flows continue to be estimated. If the present value of expected cash flows is less than the carrying amount, a loss is recorded. If the present value of expected cash flows is greater than the carrying amount, it is recognized as part of future interest income.  In accordance with Accounting Standards Codification (“ASC”) 310-30 , “ Loans and debt securities acquired with Deteriorated Credit Quality ,” and based on current information and events, if it becomes probable that there is a significant increase in cash flows previously expected to be collected or if actual cash flows are significantly greater than cash flows previously expected, the Bank will recalculate the amount of accretable yield for the acquired loans as the excess of the revised cash flows expected to be collected over the sum of (1) the initial investment in the loans less (2) cash collected less (3) write downs, if any plus (4) the amount of yield accreted to date. The amount of accretable yield will be adjusted by reclassification from non-accretable yield. This adjustment would be accounted for as a change in estimate with the amount of periodic accretion adjusted over the remaining life of the loans.
Allowance for Loan and Lease Losses ("ALLL")	Allowance for Loan and Lease Losses (“ALLL”)  The allowance for loan and lease losses is a valuation allowance for probable incurred credit losses. Loan losses are charged against the allowance when management believes the collection of the principal is unlikely. Recoveries of amounts previously charged-off are credited to the allowance. Management's determination of the adequacy of the allowance is based on a three year historical average net loss experience for each portfolio segment adjusted for current industry and economic conditions and estimates of their effect on loan collectability. While management uses available information to estimate losses on loans, future additions to the allowance may be necessary based on changes in economic conditions, particularly those affecting real estate values.  The allowance consists of specific and general components. The specific component relates to loans that are individually classified as impaired. The general component provides for estimated losses in unimpaired loans and is based on historical loss experience adjusted for current factors.  A loan is considered impaired when, based on current information and events, it is probable that Southern National will be unable to collect the scheduled payments of principal or interest when due according to the terms of the loan. Factors considered by management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all of the circumstances surrounding the loan and the borrower, including the length of the delay, the reasons for the delay, the borrower's prior payment record, and the amount of the shortfall in relation to the principal and interest owed. Impairment is measured on a loan by loan basis by either the present value of expected future cash flows discounted at the loan's effective interest rate, the loan's obtainable market price, or the fair value of the collateral if the loan is collateral dependent.  The general component covers non ‑impaired loans and is based on historical loss experience adjusted for current factors. The historical loss experience is determined by portfolio segment and is based on the actual net loss history experienced by Southern National over the most recent three years. This actual loss experience is supplemented with other economic factors based on the risks present for each portfolio segment. These economic factors include consideration of the following: levels of and trends in delinquencies and impaired loans; levels of and trends in charge-offs and recoveries; trends in volume and terms of loans; effects of any changes in risk selection and underwriting standards; other changes in lending policies, procedures, and practices; experience, ability, and depth of lending management and other relevant staff; national and local economic trends and conditions; industry conditions; and effects of changes in credit concentrations. The following portfolio segments have been identified: owner occupied commercial real estate, non-owner occupied commercial real estate, construction and land development, commercial loans, 1-4 family residential, and other consumer. While underwriting practices in this environment are more stringent, the Bank estimates the effect of internal factors on future net loss experience to be negligible. Management’s estimate of the effect of current external economic environmental conditions on future net loss experience is significant in all loan segments and particularly on loans secured by real estate including single family 1-4, non-owner occupied commercial real estate and construction and land development loans. These factors include excess inventory, generally less demand driven in part by fewer qualified borrowers and buyers. These considerations have played a significant role in management’s estimate of the adequacy of the allowance for loan and lease losses.  Commercial real estate consists of borrowings secured by owner occupied and non-owner occupied commercial real estate. Repayment of these loans is dependent upon rental income or the subsequent sale of the property for loans secured by non-owner occupied commercial real estate and by cash flows from business operations for owner occupied commercial real estate. Loans for which the source of repayment is rental income are primarily impacted by local economic conditions which dictate occupancy rates and the amount of rent charged. Commercial real estate loans that are dependent on cash flows from operations can also be adversely affected by current market conditions for their product or service.  Construction and land development primarily consist of borrowings to purchase and develop raw land into residential and non-residential properties. Construction loans are extended to individuals as well as corporations for the construction of an individual or multiple properties and are secured by raw land and the subsequent improvements. Repayment of the loans to real estate developers is dependent upon the sale or lease of properties to third parties in a timely fashion upon completion. Should there be delays in construction or a downturn in the market for those properties, there may be significant erosion in value which may be absorbed by Southern National. Commercial loans consist of borrowings for commercial purposes to individuals, corporations, partnerships, sole proprietorships, and other business enterprises. Commercial loans are generally secured by business assets such as equipment, accounts receivable, inventory, or any other asset excluding real estate and generally made to finance capital expenditures or operations. Southern National’s risk exposure is related to deterioration in the value of collateral securing the loan should foreclosure become necessary. Generally, business assets used or produced in operations do not maintain their value upon foreclosure which may require Southern National to write-down the value significantly to sell.  Residential real estate loans consist of loans to individuals for the purchase of primary residences with repayment primarily through wage or other income sources of the individual borrower. Southern National’s loss exposure to these loans is dependent on local market conditions for residential properties as loan amounts are determined, in part, by the fair value of the property at origination.  On May 15, 2014, we purchased a 44.0% equity investment and preferred stock of STM, a regional mortgage banking company headquartered in Virginia Beach, Virginia. On June 23, 2017, in connection with the EVBS acquisition, we added 4.9% of additional equity investment and preferred stock in STM, bringing us to a total equity investment of 48.9% . STM has mortgage banking originators in Delaware, Virginia, Maryland, North Carolina and South Carolina. STM only originates retail mortgage production.  Sonabank has established with STM underwriting guidelines under which it will purchase residential construction only, construction loans that convert to permanent, and permanent loans primarily in its Virginia and Maryland footprint from STM. These will be largely loans that do not conform to FNMA or FHLMC standards because of size or acreage.  Other consumer loans are comprised of loans to individuals both unsecured and secured and home equity loans secured by real estate (closed and open-end), with repayment dependent on individual wages and other income. The risk of loss on consumer loans is elevated as the collateral securing these loans, if any, rapidly depreciate in value or may be worthless and/or difficult to locate if repossession is necessary. Losses in this portfolio are generally relatively low, however, due to the small individual loan size and the balance outstanding as a percentage of Southern National’s entire portfolio.
Transfers of Financial Assets	Transfers of Financial Assets  Transfers of financial assets are accounted for as sales, when control over the assets has been relinquished. Control over transferred assets is deemed to be surrendered when the assets have been isolated from Southern National, the transferee obtains the right (free of conditions that constrain it from taking advantage of that right) to pledge or exchange the transferred assets, and Southern National does not maintain effective control over the transferred assets through an agreement to repurchase them before their maturity.
Equity Method Investments	Equity Method Investments  Southern National’s investment in STM, our mortgage affiliate, is being accounted for under the equity method. Under the equity method, the carrying value of Southern National’s investment in STM was originally recorded at cost but is adjusted periodically to record Southern National’s proportionate share of STM’s earnings or losses through noninterest income and decreased by the amount of cash dividends or similar distributions received from STM.
Bank Premises and Equipment	Bank Premises and Equipment  Land is carried at cost. Premises and equipment are stated at cost less accumulated depreciation. Buildings and related components are depreciated using the straight-line method with useful lives of 30 years . Furniture, fixtures and equipment are depreciated using the straight-line method with useful lives ranging from 3 to 10 years. Leasehold improvements are amortized over the shorter of their estimated useful lives or the lease term.
Goodwill and Intangible Assets	Goodwill and Intangible Assets  Goodwill resulting from business combinations after January 1, 2009, is generally determined as the excess of the fair value of the consideration transferred, plus the fair value of any noncontrolling interests in the acquiree, over the fair value of the net assets acquired and liabilities assumed as of the acquisition date. Goodwill and intangible assets acquired in a purchase business combination and determined to have an indefinite useful life are not amortized, but tested for impairment at least annually. Southern National has selected September 30 th as the date to perform the annual goodwill impairment assessment. Intangible assets with definite useful lives are amortized over their estimated useful lives to their estimated residual values. Goodwill is the only intangible asset with an indefinite life on our balance sheet.  Other intangible assets consist of loan servicing rights and core deposit intangible assets arising from whole-bank and branch acquisitions and are amortized over their estimated useful lives, which range from 6 to 15 years .
Stock Based Compensation	Stock Based Compensation  Compensation cost is recognized for stock options issued to employees, based on the fair value of these awards at the date of grant. A Black-Scholes option-pricing model is utilized to estimate the fair value of stock options. Compensation cost for grants of restricted shares is accounted for based on the closing price of Southern National’s common stock on the date the restricted shares are awarded. Compensation cost for stock options and restricted shares is recognized over the required service period, generally defined as the vesting period. For awards with graded vesting, compensation cost is recognized on a straight-line basis over the requisite service period for the entire award.
Bank-owned Life Insurance	Bank-owned Life Insurance  Southern National has purchased, and acquired through acquisitions, life insurance policies on certain key executives. Bank-owned life insurance is recorded at the amount that can be realized under the insurance contract at the balance sheet date, which is the cash surrender value adjusted for other charges or other amounts due that are probable at settlement.
Other Real Estate Owned ("OREO")	Other Real Estate Owned (“OREO”)  Real estate acquired through or instead of foreclosure is held for sale and initially recorded at fair value less costs to sell when acquired, establishing a new cost basis. If fair value declines subsequent to foreclosure, the direct charge-off method is recorded through expense. Operating costs after acquisition are expensed as incurred.
Stock in Federal Home Loan Bank (FHLB) and Federal Reserve Bank (FRB)	Stock in Federal Home Loan Bank (“FHLB”) and Federal Reserve Bank (“FRB”)  The Bank is a member of the FHLB system. Members are required to own a certain amount of stock based on the level of borrowings and other factors, and may invest in additional amounts. The Bank is also required to own FRB stock with a par value equal to 6% of capital. FHLB and FRB stock are carried at cost, classified as a restricted security, and periodically evaluated for impairment based on ultimate recovery of par value. Both cash and stock dividends are reported as income.
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets  Premises and equipment, core deposit intangible assets, the FDIC indemnification asset and other long-term assets are reviewed for impairment when events indicate their carrying amount may not be recoverable from future undiscounted cash flows. If impaired, the assets are recorded at fair value.
FDIC Indemnification Asset	FDIC Indemnification Asset  The acquisition of GAB on December 4, 2009 was accounted for under the acquisition method of accounting, and the assets and liabilities were recorded at their estimated fair values. The FDIC indemnification asset was measured separately from each of the covered asset categories as it is not contractually embedded in any of the covered asset categories. The indemnification asset represents the present value of cash flows expected to be received from the FDIC for future losses on covered assets based on the expected credit losses estimated for each covered loan or loan pool and the loss sharing percentages at the acquisition date. Cash flows are discounted at a market-based rate to reflect the uncertainty of the timing of the loss sharing reimbursement from the FDIC. The ultimate collectability of this asset is dependent upon the performance of the underlying covered assets, the passage of time and claims paid by the FDIC. We acquired the GAB loans in December 2009 and continuously evaluate our estimates of expected losses on these loans. During 2017, and based on the actual historical losses on the loan pools over the previous 24-month period, expected losses on the acquired GAB loans (the covered loans) were lower than previously forecasted which results in a lower expected recovery from the FDIC. As of December 31, 2017, we expect to recover $309 thousand from the FDIC under the indemnification agreement. The difference between the carrying amount of $ 1.4 million and the estimated recovery is being amortized over the remaining life of the indemnification agreement or the expected life of the loans, whichever is shorter. There were two agreements with the FDIC, one for single family assets which is a 10 - year agreement expiring in December 2019, and one for non-single family (commercial) assets which was a 5 - year agreement which expired in December 2014. The current overstatement is due to improvements in the loss estimates in the single family covered loans.
Retirement Plans	Retirement Plans  Employee 401(k) plan expense is the amount of matching contributions. Supplemental retirement plan expense allocates the benefits over years of service.
Loss Contingencies	Loss Contingencies  Loss contingencies, including claims and legal actions arising in the ordinary course of business, are recorded as liabilities when the likelihood of loss is probable and an amount or range of loss can be reasonably estimated. Management does not believe there are such matters that will have a material effect on the financial statements.
Dividend Restriction	Dividend Restriction  Banking regulations require maintaining certain capital levels and may limit the dividends paid by the Bank to Southern National or by Southern National to shareholders.
Estimates and Uncertainties	Estimates and Uncertainties  Estimates including the carrying value of investment securities, other than temporary impairment of investment securities, the determination of the allowance for loan losses, expected loan performance and recoveries from the FDIC, the valuation of goodwill, intangible assets, OREO and deferred tax assets, and fair value measurements related to assets acquired and liabilities assumed from business combinations, involves uncertainties and matters of significant judgement regarding interest rates, credit risk, repayments and 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.
Operating Segments	Operating Segments  While the chief decision-makers monitor the revenue streams of the various products and services, operations are managed and financial performance is evaluated on a company-wide basis. Discrete financial information is not available other than on a company-wide basis. Accordingly, all of the financial service operations are considered by management to be aggregated in one reportable operating segment.
Reclassifications	Reclassifications  In certain instances, amounts reported in prior years’ consolidated financial statements have been reclassified to conform to the current financial statement presentation. Such reclassifications had no effect on previously reported cash flows, shareholders’ equity or net income. 
Income Taxes	    Income Taxes  Income tax expense is the total of the current year income tax due or refundable and the change in deferred tax assets and liabilities. Deferred tax assets and liabilities are the expected future tax amounts for the temporary differences between carrying amounts and tax bases of assets and liabilities, computed using enacted tax rates. A valuation allowance, if needed, reduces deferred tax assets to the amount expected to be realized. A tax position is recognized as a benefit only if it is “more likely than not” that the tax position would be sustained in a tax examination, with a tax examination being presumed to occur. The amount recognized is the largest amount of tax benefit that is greater than 50% likely of being realized on examination. For tax positions not meeting the “more likely than not” test, no tax benefit is recorded. We have no unrecognized tax benefits and do not anticipate any increase in unrecognized tax benefits during the next twelve months. Should the accrual of any interest or penalties relative to unrecognized tax benefits be necessary, it is our policy to record such accruals in our income tax accounts; no such accruals exist as of December 31, 2017. Southern National and its subsidiaries file a consolidated U.S. federal tax return; Sonabank files a Maryland state income tax return and Southern National files a Virginia state income tax return. These returns are subject to examination by taxing authorities for all years after 2013.  On December 22, 2017 t he Tax Cuts and Jobs Act was enacted into Federal Law. The new law establishes a new flat corporate federal statutory income tax rate of 21% . For more information on the impact the new law had on Southern National, see discussion in Note 12 - Income Taxes.
Restrictions on Cash	Restrictions on Cash  No regulatory reserve or clearing requirements with the FRB were needed at December 31, 2017. However, cash on hand or on deposit with the FRB was required to meet regulatory reserve and clearing requirements of $2.9 million at December 31, 2016.
Consolidated Statements of Cash Flows	Consolidated Statements of Cash Flows  For purposes of reporting cash flows, Southern National defines cash and cash equivalents as cash due from financial institutions and interest-bearing deposits in other financial institutions with maturities less than 90 days. Net cash flows are reported for customer loan and deposit transactions and short-term borrowings.
Earnings Per Share ("EPS")	Earnings Per Share (“EPS”)  Basic EPS is computed by dividing net income by the weighted average number of common shares outstanding during the year. Diluted EPS reflects additional common shares that would have been outstanding if dilutive potential common shares had been issued, as well as any adjustment to net income that would result from the assumed issuance. Potential common shares that may be issued by Southern National relate solely to outstanding stock options and warrants and are determined using the treasury stock method.
Comprehensive Income	Comprehensive Income  Comprehensive income consists of net income and other comprehensive (loss) income. Other comprehensive (loss) income includes unrealized gains and losses on investment securities available for sale and the non-credit component of other than temporary impairment of investment securities held-to-maturity which are also recognized as a separate component of equity.
Off Balance Sheet Credit Related Financial Instruments	Off Balance Sheet Credit Related Financial Instruments  In the ordinary course of business, Southern National has entered into commitments to extend credit, standby letters of credit, and guarantees of previously sold credit card accounts assumed in the merger with EVBS. The face amount for these items represents the exposure to loss, before considering customer collateral or ability to repay.
Recent Accounting Pronouncements	Recent Accounting Pronouncements  Adoption of New Accounting Standards:  In March 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-07, Investments – Equity Method and Joint Ventures (Topic 323) , Simplifying the Transition to the Equity Method of Accounting . The amendments eliminate the requirement that when an investment qualifies for use of the equity method as a result of an increase in the level of ownership interest or degree of influence, an investor must adjust the investment, results of operations, and retained earnings retroactively on a step-by-step basis as if the equity method had been in effect during all previous periods that the investment had been held. The amendments require that the equity method investor add the cost of acquiring the additional interest in the investee to the current basis of the investor’s previously held interest and adopt the equity method of accounting as of the date the investment becomes qualified for equity method accounting. The amendments require that an entity that has an available for sale equity security that becomes qualified for the equity method of accounting recognize through earnings the unrealized holding gain or loss in accumulated other comprehensive income at the date the investment becomes qualified for use of the equity method. The amendments are effective for all entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2016. The amendments should be applied prospectively upon their effective date to increase the level of ownership interest or degree of influence that result in the adoption of the equity method. The adoption of the admendments did not have an effect on Southern National’s consolidated financial statements.  In March 2016, the FASB issued ASU 2016-09, Compensation – Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting , which is intended to simplify several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. ASU 2016-09 is effective for annual periods beginning after December 15, 2016, and interim periods within those annual periods. Early application was permitted. Southern National adopted this guidance during the first quarter of 2017 with an immaterial effect.  In January 2017, the FASB issued ASU 2017-03, Accounting Changes and Error Corrections (Topic 250) and Investments – Equity Method and Joint Ventures (Topic 323) – Amendments to SEC Paragraphs Pursuant to Staff Announcements at the September 22, 2016 and November 17, 2016 EITF Meetings. ASU 2017-03 provides amendments that add s a paragraph to include the text of “SEC Staff Announcement: Disclosure of the Impact That Recently Issued Accounting Standards Will Have on the Financial Statements of a Registrant When Such Standards Are Adopted in a Future Period” (in accordance with Staff Accounting Bulletin (“SAB”) Topic 11.M). Registrants are required to disclose the effect that recently issued accounting standards will have on their financial statements when adopted in a future period. In cases where a registrant cannot reasonably estimate the impact of the adoption, then additional qualitative disclosures should be considered to assist the reader in assessing the significance of the standard's impact on its financial statements. Southern National has enhanced its disclosures regarding the expected impact of recently issued accounting standards to be adopted in future period s will have on its accounting and disclosures.  New Accounting Standards Not Yet Adopted:  In May 2014, the FASB issued ASU 2014-09, Revenue From Contracts With Customers (Topic 606). These amendments affect any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of nonfinancial assets unless those contracts are within the scope of other standards (e.g. insurance contracts or lease contracts). This ASU will supersede the revenue recognition requirements in Topic 605, Revenue Recognition , and most industry-specific guidance, and creates a Topic 606, Revenue from Contracts with Customers. The core principle of the guidance 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 that core 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. This ASU also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgements and changes in judgements and assets recognized from costs incurred to obtain or fulfill a contract. The ASU allows for either full retrospective or modified retrospective adoption. The new guidance is effective for interim and annual reporting periods beginning after December 15, 2017. Southern National’s revenue is balanced between net interest income on financial assets and liabilities, which is explicitly excluded from the scope of the new standard, and noninterest income. Southern National is finalizing its documentation of its completed assessment of revenue streams and review of contracts affected by the ASU including deposit-related fees, gains/losses on the sale of OREO, and interchange fees, and determined the new guidance will have no significant impact on Southern National’s consolidated financial statements. Additionally, Southern National’s revenue recognition pattern for these revenue streams is not anticipated to change significantly from its previous practice. Southern National is planning to adopt ASU 2014-09 on January 1, 2018 utilizing the modified retrospective approach.  In January 2016, the FASB issued ASU 2016-01, Financial Instruments Overall (Topic 825): Recognition and Measurement of Financial Assets and Financial Liabilities . The amendments in ASU 2016-1: (a) require equity investments (except for those accounted for under the equity method of accounting or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income; (b) simplify the impairment assessment of equity securities without readily determinable fair values by requiring a qualitative assessment to identify impairment; (c) eliminate the requirement for public business entities to disclose the method and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost on the balance sheet; (d) require public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; (e) require an entity to present separately in other comprehensive income, the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk when the entity has elected to measure the liability at fair value in accordance with the fair value option for financial instruments; (f) require separate presentation of financial assets and financial liabilities by measurement category and form of financial assets on the balance sheet or the notes to the financial statements; and (g) clarify that an entity should evaluate the need for a valuation allowance on a deferred tax asset related to available for sale securities in combination with the entity’s other deferred tax assets. The amendments in this ASU are effective for public companies for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. This ASU will be effective for us in our first quarter of 201 8 and will not have a material impact on Southern National’s consolidated financial statements .  In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). The FASB issued this ASU to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet by lessees for those leases classified as operating leases under current U.S. GAAP and disclosing key information about leasing arrangements. The amendments in this ASU are effective for public business entities for annual periods, and interim periods within those annual periods, beginning after December 15, 2018. Early application of this ASU is permitted for all entities. Southern National is currently assessing the impact of the adoption of this ASU on its consolidated financial statements and anticipates recognizing a right-of-use asset and a lease liability associated with its long-term operating leases. Management is still in the process of inventorying and categorizing Southern National’s lease agreements, including those assumed in the acquisition of EVBS, and is also exploring the possible engagement of a third-party vendor solution to assist in the application of this ASU.  In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which sets forth a “current expected credit loss” (“CECL”) model requiring Southern National to measure all expected credit losses for financial instruments held at the reporting date based on historical experience, current conditions and reasonable supportable forecasts. This replaces the existing incurred loss model and is applicable to the measurement of credit losses on financial assets measured at amortized cost and applies to some off-balance sheet credit exposures. For public business entities that are U.S. Securities and Exchange Commission filers, the amendments in this update are effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Southern National is currently assessing the impact of the adoption of this ASU on its consolidated financial statements and is collecting data that will be needed to produce historical inputs into any models created as a result of adopting this ASU. Southern National is also contemplating engaging a third-party vendor to assist in the application of ASU 2016-13.   In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230) – Classification of Certain Cash Receipts and Cash Payments . The new guidance clarifies the classification within the statement of cash flows for certain transactions, including debt extinguishment costs, zero-coupon debt, contingent consideration related to business combinations, insurance proceeds, equity method distributions and beneficial interests in securitizations. The guidance also clarifies that cash flows with aspects of multiple classes of cash flows or that cannot be separated by source or use should be classified based on the activity that is likely to be the predominant source or use of cash flows for the item. This guidance is effective for fiscal years beginning after December 15, 2017 and interim periods within those fiscal years. The adoption of this guidance is not expected to be material to Southern National’s consolidated financial statements.  In January 2017, the FASB issued ASU 2017-01, Business Combinations (Topic 805): Clarifying the Definition of a Business , which is intended to provide guidance in evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses in order to provide stakeholders with more detailed reporting and less cost to analyze transactions. This ASU provides a screen to determine when a set of assets is not a business. It requires that when substantially all fair value of gross assets acquired (or disposed of) is concentrated in a single identifiable asset or group of similar identifiable assets, the set of assets is not a business. If the screen is not met, the amendments in this update provide a framework to assist entities in evaluating whether both an input and a substantive process are present for the set to be a business. ASU 2017-01 is effective for annual periods beginning after December 15, 2017, including interim periods within those annual periods. No disclosures are required at transition and early adoption is permitted. Southern National is currently evaluating the impact of adopting the new guidance on its consolidated financial statements.  In January 2017, the FASB issued ASU 2017-04 , Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment , which eliminates the second step of the previous FASB guidance for testing goodwill for impairment and is intended to reduce cost and complexity of goodwill impairment testing. The amendments in this ASU modify the concept of impairment from the condition that exists when the carrying amount of goodwill exceeds its implied fair value to the condition that exists when the carrying amount of a reporting unit exceeds its fair value. After determining if the carrying amount of a reporting unit exceeds its fair value, the entity should take an impairment charge of the same amount to the goodwill for that reporting unit, not to exceed the total goodwill amount for that reporting unit. ASU 2017-04 is effective for annual periods beginning after December 15, 2019, including interim periods within those annual periods. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. Southern National is currently evaluating the impact of adopting the new guidance on its consolidated financial statements.  In March 2017, the FASB issued ASU 2017-08, Receivables – Nonrefundable Fees and Other Costs (Subtopic 310-20), Premium Amortization on Purchased Callable Debt Securities, which shorten the amortization period for certain callable debt securities held at a premium. Specifically, the amendments require the premium to be amortized to the earliest call date. The amendments do not require an accounting change for securities held at a discount; the discount continues to be amortized to maturity. The amendments in this ASU are effective for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2018. Southern National is currently reviewing its portfolio of debt securities to determine the impact that this ASU will have on its consolidated financial statements.  In May 2017, the FASB issued ASU 2017-09, Compensation - Stock Compensation (Topic 718) , Scope of Modification Accounting . The amendments provide guidance on determining which changes to the terms and conditions of share-based payment awards require an entity to apply modification accounting under Topic 718. The guidance is effective for all entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017. Early adoption is permitted, including adoption in an interim period. The amendments in this ASU should be applied prospectively to an award modified on or after the adoption date. Southern National is currently evaluating the impact of the amendments in the ASU on its consolidated financial statements.  In February 2018, the FASB issued ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220); Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income . The amendments in this ASU require a reclassification from / to accumulated other comprehensive income and to / from retained earnings for stranded tax effects resulting from the change in the newly enacted federal corporate income tax rate. Consequently, the amendments in this ASU eliminates the stranded tax effects associated with the change in the federal corporate income tax rate in the Tax Cuts and Jobs Act of 2017. The amendments in this ASU are effective for all entities for fiscal years beginning after December 15, 2018 with early adoption allowed. Southern National plans to early adopt this ASU during the first quarter of 2018. The effect of the adoption of this ASU will be to increase accumulated other comprehensive loss by approximately $227 thousand with the offset to retained earnings as recorded in the statement of changes in stockholders' equity. This represents the difference between the historical federal corporate income tax rate and the newly enacted 21 percent federal corporate income tax rate.

BUSINESS COMBINATIONS (Tables)

BUSINESS COMBINATIONS (Tables)	12 Months Ended
	Dec. 31, 2017
Business Combinations [Abstract]
Schedule of Business Acquisitions	The following table details the total consideration paid by SNBV on June 23, 2017 in connection with the acquisition of EVBS, the fair values of the assets acquired and liabilities assumed, and the resulting goodwill:     As Recorded Fair Value As Recorded  (dollars in thousands) by EVBS Adjustments by the Company  Consideration paid:  Cash $ 10  SNBV common stock 198,909  Total consideration paid $ 198,919   Identifiable assets acquired:  Cash and due from banks $ 4,350 $ - $ 4,350  Interest bearing deposits with banks 18,993 - 18,993  Federal funds sold 682 - 682  Securities available for sale, at fair value 163,029 (150) 162,879  Securities held to maturity, at carrying value 19,036 508 19,544  Restricted securities, at cost 6,734 - 6,734  Loans 1,045,600 (13,618) 1,031,982  Loans held for sale 19,689 - 19,689  Deferred income taxes 15,735 4,912 20,647  Bank premises and equipment 24,242 4,110 28,352  Assets held for sale 2,970 (1,043) 1,927  Accrued interest receivable 4,272 - 4,272  Other real estate owned 563 (16) 547  Core deposit intangible 435 9,590 10,025  Bank owned life insurance 26,035 - 26,035  Other assets 10,004 - 10,004  Total identifiable assets acquired 1,362,369 4,293 1,366,662   Identifiable liabilities assumed:  Noninterest-bearing demand accounts 226,637 - 226,637  Interest-bearing deposits 920,743 1,182 921,925  Federal funds purchased and repurchase agreements 7,598 - 7,598  Federal Home Loan Bank advances 57,475 - 57,475  Junior subordinated debt 10,310 (801) 9,509  Senior subordinated notes 19,175 1,876 21,051  Accrued interest payable 902 - 902  Other liabilities 12,748 - 12,748  Total identifiable liabilities assumed 1,255,588 2,257 1,257,845   Net identifiable assets acquired $ 106,781 $ 2,036 $ 108,817   Goodwill resulting from acquisition $ 90,102  
Schedule of amortization and accretion of premiums and discounts associated with acquisition accounting adjustments to assets acquired and liabilities	The net effect of the amortization of premiums and accretion of discounts associated with the Company’s acquisition accounting adjustments to assets acquired and liabilities assumed from EVBS had the following impact on the consolidated statements of income for the year ended December 31, 2017:     For the Year Ended  (dollars in thousands) December 31, 2017  Loans (1) $ 2,800  Time deposits (2) 407  Junior and senior subordinated debt (3) 43  Core deposit intangible (4) (651)  Net impact to income before income taxes $ 2,599     (1) Loan discount accretion is included in the “Interest and fees on loans” section of “Interest and dividend income” in the Consolidated Statements of Income. (2) Time deposit premium amortization is included in the "Interest on deposits" section of "Interest expense" in the Consolidated Statements of Income. (3) The junior subordinated debt discount accretion and senior subordinated notes premium amortization are included in the “Interest on junior subordinated debt” and “Interest on senior subordinated notes” section of “Interest expense”, respectively, in the Consolidated Statements of Income. (4) Core deposit intangible premium amortization is included in the "Other operating expenses" section of "Noninterest expenses" in the Consolidated Statements of Income. 
Schedule of loans and debt securities acquired with deteriorated credit quality	Included in the $1.05 billion of acquired loans were certain loans acquired with deteriorating credit quality, or purchased credit impaired loans. The table below summarizes the purchased credit impaired loans acquired in the EVBS acquisition on June 23, 2017 (in thousands):    Purchased Credit  Impaired Loans  Contractually required principal and interest at acquisition $ 17,970  Contractual cash flows not expected to be collected (nonaccretable difference) (6,243)  Expected cash flows at acquisition 11,727  Accretable difference 398  Basis in acquired loans at acquisition - estimated fair value $ 11,329  
Schedule of unaudited pro forma	Southern National expects to achieve further operational cost savings and other efficiencies as a result of the acquisition which are not reflected in the pro forma amounts below:    Pro Forma Pro Forma  Twelve Months Ended Twelve Months Ended  December 31, December 31,  (dollars in thousands, except per share data) 2017 2016  Net interest income $ 91,010 $ 85,114  Net income 9,555 18,354   Earnings per share, basic $ 0.40 $ 0.77  Earnings per share, diluted $ 0.39 $ 0.76   Weighted average shares outstanding - Basic 23,923,410 23,923,410  Weighted average shares outstanding - Diluted 24,228,054 24,228,054  

INVESTMENT SECURITIES (Tables)

INVESTMENT SECURITIES (Tables)	12 Months Ended
	Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Schedule of amortized cost and fair value of securities available-for-sale	The amortized cost and fair value of available for sale investment securities and the related gross unrealized gains and losses recognized in accumulated other comprehensive income (loss) were as follows (in thousands):     Amortized Gross Unrealized Fair  December 31, 2017 Cost Gains Losses Value  Residential government-sponsored mortgage-backed securities $ 31,145 $ 3 $ (284) $ 30,864  Obligations of states and political subdivisions 18,581 187 (41) 18,727  Corporate securities 2,013 2 - 2,015  Trust preferred securities 2,590 - (202) 2,388  Residential government-sponsored collateralized  mortgage obligations 51,521 1 (756) 50,766  Government-sponsored agency securities 3,247 - (21) 3,226  Agency commercial mortgage-backed securities 28,263 - (365) 27,898  SBA pool securities 24,829 68 (108) 24,789  $ 162,189 $ 261 $ (1,777) $ 160,673   Amortized Gross Unrealized Fair  December 31, 2016 Cost Gains Losses Value  Obligations of states and political subdivisions $ 2,280 $ 9 $ (30) $ 2,259  Trust preferred securities 2,590 - (931) 1,659  $ 4,870 $ 9 $ (961) $ 3,918 
Schedule of amortized cost, unrecognized gains and losses, and fair value of held to maturity securities	 The amortized cost, unrecognized gains and losses, and fair value of investment securities held to maturity were as follows (in thousands):    Amortized Gross Unrecognized Fair  December 31, 2017 Cost Gains Losses Value  Residential government-sponsored mortgage-backed securities $ 11,500 $ 23 $ (77) $ 11,446  Obligations of states and political subdivisions 22,830 169 (56) 22,943  Trust preferred securities 3,205 165 (17) 3,353  Residential government-sponsored collateralized  mortgage obligations 8,727 - (99) 8,628  Government-sponsored agency securities 52,650 25 (1,448) 51,227  $ 98,912 $ 382 $ (1,697) $ 97,597   Amortized Gross Unrecognized Fair  December 31, 2016 Cost Gains Losses Value  Residential government-sponsored mortgage-backed securities $ 18,594 $ 308 $ (118) $ 18,784  Obligations of states and political subdivisions 12,706 53 (162) 12,597  Trust preferred securities 3,654 - (146) 3,508  Residential government-sponsored collateralized  mortgage obligations 2,371 - (54) 2,317  Government-sponsored agency securities 47,975 28 (1,865) 46,138  $ 85,300 $ 389 $ (2,345) $ 83,344 
Schedule of fair value and carrying amount, if different, of debt securities, by contractual maturity	  Available for Sale Held to Maturity  Amortized Amortized  Cost Fair Value Cost Fair Value  Due in one to five years $ 1,932 $ 1,911 $ 1,895 $ 1,892  Due in five to ten years 6,886 6,925 23,033 22,616  Due after ten years 17,613 17,520 53,757 53,015  Residential government-sponsored mortgage-backed securities 31,145 30,864 11,500 11,446  Residential government-sponsored collateralized mortgage obligations 51,521 50,766 8,727 8,628  Agency commercial mortgage-backed securities 28,263 27,898 - -  SBA pool securities 24,829 24,789 - -  Total $ 162,189 $ 160,673 $ 98,912 $ 97,597 
Schedule of present information regarding securities in a continuous unrealized loss position by duration of time in a loss position	The following tables present information regarding investment securities in a continuous unrealized loss position as of December 31, 2017 and 2016 by duration of time in a loss position (in thousands):     December 31, 2017  Less than 12 months 12 Months or More Total  Available for Sale Fair value Unrealized Losses Fair value Unrealized Losses Fair value Unrealized Losses  Residential government-sponsored  mortgage-backed securities $ 30,336 $ (284) $ - $ - $ 30,336 $ (284)  Obligations of states and political subdivisions 4,642 (41) - - 4,642 (41)  Trust preferred securities 1,473 (18) 915 (184) 2,388 (202)  Residential government-sponsored collateralized  mortgage obligations 50,555 (756) - - 50,555 (756)  Government-sponsored agency securities 1,726 (21) - - 1,726 (21)  Agency commercial mortgage-backed securities 27,898 (365) - - 27,898 (365)  SBA pool securities 15,156 (108) - - 15,156 (108)  $ 131,786 $ (1,593) $ 915 $ (184) $ 132,701 $ (1,777)   Less than 12 months 12 Months or More Total  Held to Maturity Fair value Unrecognized Losses Fair value Unrecognized Losses Fair value Unrecognized Losses  Residential government-sponsored  mortgage-backed securities $ 3,409 $ (26) $ 2,986 $ (51) $ 6,395 $ (77)  Obligations of states and political subdivisions 7,918 (34) 1,782 (22) 9,700 (56)  Trust preferred securities - - 240 (17) 240 (17)  Residential government-sponsored collateralized  mortgage obligations 7,112 (46) 1,516 (53) 8,628 (99)  Government-sponsored agency securities 1,719 (2) 37,532 (1,446) 39,251 (1,448)  $ 20,158 $ (108) $ 44,056 $ (1,589) $ 64,214 $ (1,697)   December 31, 2016  Less than 12 months 12 Months or More Total  Available for Sale Fair value Unrealized Losses Fair value Unrealized Losses Fair value Unrealized Losses  Obligations of states and political subdivisions $ 1,706 $ (30) $ - $ - $ 1,706 $ (30)  Trust preferred securities - - 1,658 (931) 1,658 (931)  $ 1,706 $ (30) $ 1,658 $ (931) $ 3,364 $ (961)    Less than 12 months 12 Months or More Total  Held to Maturity Fair value Unrecognized Losses Fair value Unrecognized Losses Fair value Unrecognized Losses  Residential government-sponsored  mortgage-backed securities $ 10,238 $ (110) $ 457 $ (8) $ 10,695 $ (118)  Obligations of states and political subdivisions 3,578 (98) 1,065 (64) 4,643 (162)  Trust preferred securities - - 3,508 (146) 3,508 (146)  Residential government-sponsored collateralized  mortgage obligations 1,346 (27) 971 (27) 2,317 (54)  Government-sponsored agency securities 41,110 (1,865) - - 41,110 (1,865)  $ 56,272 $ (2,100) $ 6,001 $ (245) $ 62,273 $ (2,345) 
Schedule of owned pooled trust preferred securities	As of December 31, 2017, we owned pooled trust preferred investment securities as follows (in thousands):     % of Previously  Current Recognized  Defaults and Cumulative  Ratings When Estimated Deferrals Other  Tranche Purchased Current Ratings Par Book Fair to Total Comprehensive  Security Level Moody's Fitch Moody's Fitch Value Value Value Collateral Loss (1)  Held to Maturity  ALESCO VII A1B Senior Aaa AAA Aa2 A $ 3,192 $ 2,948 $ 3,113 18% $ 226  MMCF III B Senior Sub A3 A- Ba1 BBB 261 257 240 32% 4  $ 3,453 $ 3,205 $ 3,353 $ 230   Cumulative OTTI  Available for Sale Related to  Other Than Temporarily Impaired: Credit Loss (2)  TPREF FUNDING II Mezzanine A1 A- Caa3 C $ 1,500 $ 1,099 $ 915 29% $ 400  ALESCO V C1 Mezzanine A2 A Caa1 C 2,150 1,491 1,473 14% 660  $ 3,650 $ 2,590 $ 2,388 $ 1,060   Total $ 7,103 $ 5,795 $ 5,741  (1) Pre-tax, and represents unrealized losses at date of transfer from available for sale to held to maturity, net of accretion (2) Pre-tax
Schedule of credit losses recognized in earnings	We recognized no OTTI charges during 2017, 2016 or 2015, respectively. The following table presents a roll forward of the credit losses on our investment securities previously classified as held to maturity and now classified as available for sale recognized in earnings for the years ended December 31, 2017, 2016 and 2015 (in thousands):     2017 2016 2015  Amount of cumulative other than temporary impairment  related to credit loss prior to January 1 $ 1,060 $ 1,060 $ 8,949  Reductions due to sales of investment securities for which an other than  temporary impairment was previously recognized - - (7,889)  Amount of cumulative other than temporary impairment  related to credit loss as of December 31 $ 1,060 $ 1,060 $ 1,060 
Schedule of changes in accumulated other comprehensive income by component	Changes in accumulated other comprehensive (loss) by component for the years ended December 31, 2017, 2016 and 2015 are shown in the table below. All amounts are net of tax (in thousands).    Unrealized Holding  (Losses) on  For the year ended December 31, 2017 Available for Sale Held to Maturity  Securities Securities Total  Beginning balance $ (627) $ (162) $ (789)  Other comprehensive (loss) income before reclassifications (372) (246) (618)  Amounts reclassified from accumulated other comprehensive income - 255 255  Net current-period other comprehensive (loss) income (372) 9 (363)  Ending balance $ (999) $ (153) $ (1,152)    Unrealized Holding  (Losses) on  For the year ended December 31, 2016 Available for Sale Held to Maturity  Securities Securities Total  Beginning balance $ (440) $ (170) $ (610)  Other comprehensive (loss) income before reclassifications (187) 8 (179)  Net current-period other comprehensive (loss) income (187) 8 (179)  Ending balance $ (627) $ (162) $ (789)   Unrealized Holding  (Losses) on  For the year ended December 31, 2015 Available for Sale Held to Maturity  Securities Securities Total  Beginning balance $ (6) $ (3,014) $ (3,020)  Other comprehensive (loss) income before reclassifications (434) 21 (413)  Amounts reclassified from accumulated other comprehensive income - 2,823 2,823  Net current-period other comprehensive (loss) income (434) 2,844 2,410  Ending balance $ (440) $ (170) $ (610) 

LOANS (Tables)

LOANS (Tables)	12 Months Ended
	Dec. 31, 2017
Accounts Notes And Loans Receivable [Line Items]
Schedule of loans, net of unearned income	Loans, net of unearned income, consist of the following at year end (in thousands):     December 31, 2017 December 31, 2016  Loans secured by real estate:  Commercial real estate - owner occupied $ 401,847 $ 154,807  Commercial real estate - non-owner occupied 440,700 279,634  Secured by farmland 23,038 541  Construction and land development 197,972 91,067  Residential 1-4 family (1) 483,006 230,810  Multi- family residential 70,892 30,021  Home equity lines of credit (1) 152,829 29,203  Total real estate loans 1,770,284 816,083   Commercial loans 253,258 115,365  Consumer loans 39,374 856  Gross loans 2,062,916 932,304  Less deferred fees on loans (588) (1,889)  Loans, net of deferred fees $ 2,062,328 $ 930,415  (1) Includes $23.3 million and $28.2 million of loans as of December 31, 2017 and 2016, respectively, acquired in the GAB transaction covered under an FDIC loss-share agreement. The agreement covering single family loans expires in December 2019.
Schedule of summary of impaired loans	Impaired loans for the portfolio were as follows (in thousands):     December 31, 2017 Total Loans  Unpaid  Recorded Principal Related  Investment (1) Balance Allowance  With no related allowance recorded:  Commercial real estate - owner occupied $ 767 $ 781 $ -  Commercial real estate - non-owner occupied (2) 766 830 -  Construction and land development 9,969 9,984 -  Commercial loans 6,035 12,847 -  Residential 1-4 family (3) 3,160 3,430 -  Other consumer loans - - -  Total $ 20,697 $ 27,872 $ -   With an allowance recorded:  Commercial real estate - owner occupied $ - $ - $ -  Commercial real estate - non-owner occupied (2) - - -  Construction and land development - - -  Commercial loans - - -  Residential 1-4 family (3) - - -  Other consumer loans - - -  Total $ - $ - $ -  Grand total $ 20,697 $ 27,872 $ -  (1) Recorded investment is after cumulative prior charge offs of $6.8 million. These loans also have aggregate SBA guarantees of $5.0 million. (2) Includes loans secured by farmland and multi-family residential loans. (3) Includes home equity lines of credit.     December 31, 2016 Total Loans  Unpaid  Recorded Principal Related  Investment (1) Balance Allowance  With no related allowance recorded:  Commercial real estate - owner occupied $ 5,583 $ 5,592 $ -  Commercial real estate - non-owner occupied (2) - - -  Construction and land development - - -  Commercial loans 3,002 3,603 -  Residential 1-4 family (3) 963 1,113 -  Other consumer loans - - -  Total $ 9,548 $ 10,308 $ -   With an allowance recorded:  Commercial real estate - owner occupied $ 688 $ 688 $ 150  Commercial real estate - non-owner occupied (2) - - -  Construction and land development - - -  Commercial loans 3,378 5,798 750  Residential 1-4 family (3) - - -  Other consumer loans - - -  Total $ 4,066 $ 6,486 $ 900  Grand total $ 13,614 $ 16,794 $ 900  (1) Recorded investment is after cumulative prior charge offs of $3.0 million. These loans also have aggregate SBA guarantees of $2.2 million. (2) Includes loans secured by farmland and multi-family residential loans. (3) Includes home equity lines of credit.
Schedule of details of average recorded investment and interest income for impaired loans recognized by class of loans	The following tables present the average recorded investment and interest income for impaired loans recognized by class of loans for the years ended December 31, 2017, 2016 and 2015 (in thousands):     For the Year Ended December 31, 2017 Total Loans  Average Interest  Recorded Income  Investment Recognized  With no related allowance recorded:  Commercial real estate - owner occupied $ 875 $ 34  Commercial real estate - non-owner occupied (1) 890 56  Construction and land development 9,942 139  Commercial loans 12,655 485  Residential 1-4 family (2) 3,398 91  Other consumer loans - -  Total $ 27,760 $ 805   With an allowance recorded:  Commercial real estate - owner occupied $ - $ -  Commercial real estate - non-owner occupied (1) - -  Construction and land development - -  Commercial loans - -  Residential 1-4 family (2) - -  Other consumer loans - -  Total $ - $ -  Grand total $ 27,760 $ 805  (1) Includes loans secured by farmland and multi-family residential loans. (2) Includes home equity lines of credit.    For the Year Ended December 31, 2016 Total Loans  Average Interest  Recorded Income  Investment Recognized  With no related allowance recorded:  Commercial real estate - owner occupied $ 6,454 $ 292  Commercial real estate - non-owner occupied (1) 103 3  Construction and land development - -  Commercial loans 2,888 54  Residential 1-4 family (2) 988 32  Other consumer loans - -  Total $ 10,433 $ 381   With an allowance recorded:  Commercial real estate - owner occupied $ 694 $ 31  Commercial real estate - non-owner occupied (1) - -  Construction and land development - -  Commercial loans 3,402 155  Residential 1-4 family (2) - -  Other consumer loans - -  Total $ 4,096 $ 186  Grand total $ 14,529 $ 567  (1) Includes loans secured by farmland and multi-family residential loans. (2) Includes home equity lines of credit.     For the Year Ended December 31, 2015 Total Loans  Average Interest  Recorded Income  Investment Recognized  With no related allowance recorded:  Commercial real estate - owner occupied $ 7,156 $ 297  Commercial real estate - non-owner occupied (1) 822 11  Construction and land development 89 -  Commercial loans 3,428 -  Residential 1-4 family (2) 1,501 26  Other consumer loans - -  Total $ 12,996 $ 334   With an allowance recorded:  Commercial real estate - owner occupied $ 2,259 $ 42  Commercial real estate - non-owner occupied (1) - -  Construction and land development 93 -  Commercial loans 3,488 213  Residential 1-4 family (2) 416 -  Other consumer loans - -  Total $ 6,256 $ 255  Grand total $ 19,252 $ 589  (1) Includes loans secured by farmland and multi-family residential loans. (2) Includes home equity lines of credit.
Schedule of details of aging of the recorded investment in past due loans by class of loans	The following tables present the aging of the recorded investment in past due loans by class of loans as of December 31, 2017 and 2016 (in thousands):     December 31, 2017 30 - 59 60 - 89  Days Days 90 Days Total Nonaccrual Loans Not Total  Past Due Past Due or More Past Due Loans Past Due Loans  Total loans:  Commercial real estate - owner occupied $ 687 $ - $ - $ 687 $ - $ 401,160 $ 401,847  Commercial real estate - non-owner  occupied (1) 138 50 - 188 - 534,442 534,630  Construction and land development 1,134 149 - 1,283 9,969 186,720 197,972  Commercial loans 496 - - 496 5,664 247,098 253,258  Residential 1-4 family (2) 2,926 361 - 3,287 2,392 630,156 635,835  Other consumer loans 57 1 - 58 - 39,316 39,374   Total $ 5,438 $ 561 $ - $ 5,999 $ 18,025 $ 2,038,892 $ 2,062,916     December 31, 2016 30 - 59 60 - 89  Days Days 90 Days Total Nonaccrual Loans Not Total  Past Due Past Due or More Past Due Loans Past Due Loans  Total loans:  Commercial real estate - owner occupied $ - $ - $ - $ - $ 637 $ 154,170 $ 154,807  Commercial real estate - non-owner  occupied (1) - - - - - 310,196 310,196  Construction and land development - - - - - 91,067 91,067  Commercial loans 1,349 - - 1,349 3,158 110,858 115,365  Residential 1-4 family (2) 1,232 95 - 1,327 850 257,836 260,013  Other consumer loans - - - - - 856 856   Total $ 2,581 $ 95 $ - $ 2,676 $ 4,645 $ 924,983 $ 932,304  (1) Includes loans secured by farmland and multi-family residential loans. (2) Includes home equity lines of credit.
Schedule of Activity for Loan and Lease Losses By Class of Loan	Activity in the allowance for loan and lease losses by class of loan for the years ended December 31, 2017, 2016 and 2015 is summarized below (in thousands):     Commercial Commercial  Real Estate Real Estate Construction Other  Owner Non-owner and Land Commercial 1-4 Family Consumer  Year ended December 31, 2017 Occupied Occupied (1) Development Loans Residential (2) Loans Unallocated Total  Allowance for loan losses:  Beginning balance $ 905 $ 1,484 $ 752 $ 3,366 $ 1,279 $ 78 $ 746 $ 8,610  Charge offs - (100) - (8,250) (369) (110) - (8,829)  Recoveries 132 299 1 538 17 4 - 991  Provision (347) (362) (61) 8,842 659 640 (746) 8,625  Ending balance $ 690 $ 1,321 $ 692 $ 4,496 $ 1,586 $ 612 $ - $ 9,397   Year ended December 31, 2016  Allowance for loan losses:  Beginning balance $ 1,185 $ 1,222 $ 865 $ 3,041 $ 1,408 $ 48 $ 652 $ 8,421  Charge offs (799) - (449) (3,370) (22) (322) - (4,962)  Recoveries 8 - 121 96 10 4 - 239  Provision 511 262 215 3,599 (117) 348 94 4,912  Ending balance $ 905 $ 1,484 $ 752 $ 3,366 $ 1,279 $ 78 $ 746 $ 8,610   Year ended December 31, 2015  Allowance for loan losses:  Beginning balance $ 855 $ 1,123 $ 1,644 $ 2,063 $ 1,339 $ 53 $ 337 $ 7,414  Adjustments (3) - - - - (17) - - (17)  Charge offs (1,067) - - (1,174) (413) (19) - (2,673)  Recoveries 18 18 139 91 259 1 - 526  Provision 1,379 81 (918) 2,061 240 13 315 3,171  Ending balance $ 1,185 $ 1,222 $ 865 $ 3,041 $ 1,408 $ 48 $ 652 $ 8,421  (1) Includes loans secured by farmland and multi-family residential loans. (2) Includes home equity lines of credit. (3) Represents the portion of increased expected losses which is covered by the loss sharing agreement with the FDIC.
Schedule of allowance for loan losses and the recorded investment by portfolio segment	The following table presents the balance in the allowance for loan losses and the recorded investment in loans by portfolio segment and based on impairment method as of December 31, 2017 and 2016 (in thousands):      Commercial Commercial  Real Estate Real Estate Construction Other  Owner Non-owner and Land Commercial 1-4 Family Consumer  Occupied Occupied (1) Development Loans Residential (2) Loans Unallocated Total  December 31, 2017  Ending allowance balance attributable to loans:  Individually evaluated for impairment $ - $ - $ - $ - $ - $ - $ - $ -  Collectively evaluated for impairment 690 1,321 692 4,496 1,586 612 - 9,397  Total ending allowance $ 690 $ 1,321 $ 692 $ 4,496 $ 1,586 $ 612 $ - $ 9,397   Loans:  Individually evaluated for impairment $ 767 $ 766 $ 9,969 $ 6,035 $ 3,160 $ - $ - $ 20,697  Collectively evaluated for impairment 401,080 533,864 188,003 247,223 632,675 39,374 - 2,042,219  Total ending loan balances $ 401,847 $ 534,630 $ 197,972 $ 253,258 $ 635,835 $ 39,374 $ - $ 2,062,916   December 31, 2016  Ending allowance balance attributable to loans:  Individually evaluated for impairment $ 150 $ - $ - $ 750 $ - $ - $ - $ 900  Collectively evaluated for impairment 755 1,484 752 2,616 1,279 78 746 7,710  Total ending allowance $ 905 $ 1,484 $ 752 $ 3,366 $ 1,279 $ 78 $ 746 $ 8,610   Loans:  Individually evaluated for impairment $ 6,271 $ - $ - $ 6,380 $ 963 $ - $ - $ 13,614  Collectively evaluated for impairment 148,536 310,196 91,067 108,985 259,050 856 - 918,690  Total ending loan balances $ 154,807 $ 310,196 $ 91,067 $ 115,365 $ 260,013 $ 856 $ - $ 932,304    (1) Includes loans secured by farmland and multi-family residential loans. (2) Includes home equity lines of credit.
Schedule of the risk category of loans by class of loans	As of December 31, 2017 and 2016, and based on the most recent analysis performed, the risk category of loans by class of loans is as follows (in thousands):     December 31, 2017 Total Loans  Special  Mention Substandard (3) Pass Total  Commercial real estate - owner occupied $ 4,178 $ 1,678 $ 395,991 $ 401,847  Commercial real estate - non-owner occupied (1) 5,705 830 528,095 534,630  Construction and land development 128 9,969 187,875 197,972  Commercial loans 5,936 6,035 241,287 253,258  Residential 1-4 family (2) 1,323 3,935 630,577 635,835  Other consumer loans 162 - 39,212 39,374   Total $ 17,432 $ 22,447 $ 2,023,037 $ 2,062,916   December 31, 2016 Total Loans  Special  Mention Substandard (3) Pass Total  Commercial real estate - owner occupied $ - $ 6,271 $ 148,536 $ 154,807  Commercial real estate - non-owner occupied (1) - - 310,196 310,196  Construction and land development - - 91,067 91,067  Commercial loans 28 6,380 108,957 115,365  Residential 1-4 family (2) - 963 259,050 260,013  Other consumer loans - - 856 856  Total $ 28 $ 13,614 $ 918,662 $ 932,304    (1) Includes loans secured by farmland and multi-family residential loans. (2) Includes home equity lines of credit.  (3) Includes SBA guarantees of $5.0 million and $2.2 million as of December 31, 2017 and 2016, respectively. 
GAB acquisition [Member]
Accounts Notes And Loans Receivable [Line Items]
Schedule of carrying amount of covered purchased impaired and non-impaired loans	            The following table presents the carrying amount of purchased impaired and non-impaired loans from the GAB acquisition as of December 31, 2017 and 2016 (in thousands):    December 31, 2017 December 31, 2016  Purchased Purchased Purchased Purchased  Impaired Non-impaired Impaired Non-impaired  Loans Loans Total Loans Loans Total  Commercial real estate (1) $ 1,050 $ 2,257 $ 3,307 $ 1,080 $ 3,630 $ 4,710  Construction and land development - - - - - -  Commercial loans 189 280 469 193 347 540  Residential 1-4 family (2) - 23,339 23,339 - 28,180 28,180  Other consumer loans - 67 67 - 14 14  Total $ 1,239 $ 25,943 $ 27,182 $ 1,273 $ 32,171 $ 33,444   (1) Includes owner occupied and non-owner occupied as well as loans secured by farmland and multi-family residential loans. (2) Includes home equity lines of credit.
Changes in Carrying Amount and Accretable Yield for Purchased Impaired and Nonimpaired Loans	Changes in the carrying amount and accretable yield for purchased impaired and non-impaired loans from the GAB acquisition were as follows for the years ended December 31, 2017 and 2016 (in thousands):     December 31, 2017 December 31, 2016  Purchased Impaired Purchased Non-impaired Purchased Impaired Purchased Non-impaired  Carrying Carrying Carrying Carrying  Accretable Amount Accretable Amount Accretable Amount Accretable Amount  Yield of Loans Discount of Loans Yield of Loans Discount of Loans  Balance at beginning  of the period $ - $ 1,273 $ 3,761 $ 32,171 $ - $ 1,444 $ 4,597 $ 38,758  Additions - - - - - - - -  Accretion - - (886) 892 - - (1,085) 1,085  Reclassifications  from nonaccretable  balance - - 230 - - - 269 -  Adjustment-transfer to  OREO - - - - - - (20) (169)  Payments received - (34) - (7,120) - (171) - (7,503)  Balance at end of  the period $ - $ 1,239 $ 3,105 $ 25,943 $ - $ 1,273 $ 3,761 $ 32,171 
Eastern Virginia Bankshares Inc [Member]
Accounts Notes And Loans Receivable [Line Items]
Schedule of carrying amount of covered purchased impaired and non-impaired loans	The following table presents the carrying amount of purchased impaired and non-impaired loans from the EVBS acquisition as of December 31, 2017 (in thousands):     December 31, 2017  Purchased Purchased  Impaired Non-impaired  Loans Loans Total  Commercial real estate (1) $ 5,788 $ 418,170 $ 423,958  Construction and land development - 85,036 85,036  Commercial loans 3,598 112,693 116,291  Residential 1-4 family (2) 1,255 282,702 283,957  Other consumer loans - 33,539 33,539  Total $ 10,641 $ 932,140 $ 942,781  (1) Includes owner occupied and non-owner occupied as well as loans secured by farmland and multi-family residential loans. (2) Includes home equity lines of credit.
Changes in Carrying Amount and Accretable Yield for Purchased Impaired and Nonimpaired Loans	Changes in the carrying amount and accretable yield for purchased impaired and non-impaired loans from the EVBS acquisition were as follows for the year ended December 31, 2017 (in thousands):     December 31, 2017  Purchased Impaired Purchased Non-impaired  Carrying Carrying  Accretable Amount Accretable Amount  Yield of Loans Discount of Loans  Balance at beginning  of period $ - $ - $ - $ -  Additions 398 11,329 14,783 1,020,653  Accretion (83) 83 (2,669) 2,669  Adjustment-transfer to  OREO - - - (43)  Payments received - (771) - (91,139)  Balance at end of  the period $ 315 $ 10,641 $ 12,114 $ 932,140  
HarVest acquisition
Accounts Notes And Loans Receivable [Line Items]
Schedule of carrying amount of covered purchased impaired and non-impaired loans	           The following table presents the carrying amount of purchased impaired and non-impaired loans from the HarVest acquisition as of December 31, 2017 and 2016 (in thousands):     December 31, 2017 December 31, 2016  Purchased Purchased Purchased Purchased  Impaired Non-impaired Impaired Non-impaired  Loans Loans Total Loans Loans Total  Commercial real estate (1) $ - $ 9,162 $ 9,162 $ 258 $ 10,150 $ 10,408  Construction and land development 396 2,869 3,265 488 2,996 3,484  Commercial loans - 1,688 1,688 - 2,062 2,062  Residential 1-4 family (2) 792 4,290 5,082 818 6,221 7,039  Other consumer loans - - - - 2 2  Total $ 1,188 $ 18,009 $ 19,197 $ 1,564 $ 21,431 $ 22,995  (1) Includes owner occupied and non-owner occupied as well as loans secured by farmland and multi-family residential loans. (2) Includes home equity lines of credit.
Changes in Carrying Amount and Accretable Yield for Purchased Impaired and Nonimpaired Loans	Changes in the carrying amount and accretable yield for purchased impaired and non-impaired loans from the HarVest acquisition were as follows for the years ended December 31, 2017 and 2016 (in thousands):      December 31, 2017 December 31, 2016  Purchased Impaired Purchased Non-impaired Purchased Impaired Purchased Non-impaired   Carrying Carrying Carrying Carrying  Accretable Amount Accretable Amount Accretable Amount Accretable Amount  Yield of Loans Discount of Loans Yield of Loans Discount of Loans  Balance at beginning  of the period $ - $ 1,564 $ 662 $ 21,431 $ - $ 1,688 $ 858 $ 27,878  Additions - - - - - - - -  Accretion - - (184) 184 - - (196) 139  Payments received - (376) - (3,606) - (124) - (6,586)  Balance at end of  the period $ - $ 1,188 $ 478 $ 18,009 $ - $ 1,564 $ 662 $ 21,431 
Prince George Federal Savings Bank [Member]
Accounts Notes And Loans Receivable [Line Items]
Schedule of carrying amount of covered purchased impaired and non-impaired loans	The following table presents the carrying amount of purchased impaired and non-impaired loans from the PGFSB acquisition as of December 31, 2017 and 2016 (in thousands):     December 31, 2017 December 31, 2016  Purchased Purchased Purchased Purchased  Impaired Non-impaired Impaired Non-impaired  Loans Loans Total Loans Loans Total  Commercial real estate (1) $ 198 $ 1,997 $ 2,195 $ 225 $ 2,638 $ 2,863  Construction and land development - 1,216 1,216 355 860 1,215  Commercial loans - 39 39 - 116 116  Residential 1-4 family (2) 348 32,357 32,705 - 38,018 38,018  Other consumer loans - 100 100 - 142 142  Total $ 546 $ 35,709 $ 36,255 $ 580 $ 41,774 $ 42,354  (1) Includes owner occupied and non-owner occupied as well as loans secured by farmland and multi-family residential loans. (2) Includes home equity lines of credit.
Changes in Carrying Amount and Accretable Yield for Purchased Impaired and Nonimpaired Loans	Changes in the carrying amount and accretable yield for purchased impaired and non-impaired loans from the PGFSB acquisition were as follows for the year ended December 31, 2017 and 2016 (in thousands):     December 31, 2017 December 31, 2016  Purchased Impaired Purchased Non-impaired Purchased Impaired Purchased Non-impaired  Carrying Carrying Carrying Carrying  Accretable Amount Accretable Amount Accretable Amount Accretable Amount  Yield of Loans Discount of Loans Yield of Loans Discount of Loans  Balance at beginning  of the period $ - $ 580 $ 2,096 $ 41,774 $ - $ 703 $ 2,462 $ 51,263  Additions - - - - - - - -  Accretion - - (333) 333 - - (366) 365  Payments received - (34) - (6,398) - (123) - (9,854)  Balance at end of  the period $ - $ 546 $ 1,763 $ 35,709 $ - $ 580 $ 2,096 $ 41,774 

FAIR VALUE (Tables)

FAIR VALUE (Tables)	12 Months Ended
	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Schedule of assets measured at fair value on a recurring basis	Assets measured at fair value on a recurring basis are summarized below:     Fair Value Measurements Using  Significant  Quoted Prices in Other Significant  Active Markets for Observable Unobservable  Total at Identical Assets Inputs Inputs  (dollars in thousands) December 31, 2017 (Level 1) (Level 2) (Level 3)  Financial assets:  Available for sale investment securities  Residential government-sponsored  mortgage-backed securities $ 30,864 $ - $ 30,864 $ -  Obligations of states and political subdivisions 18,727 - 18,727 -  Corporate securities 2,015 - 2,015 -  Trust preferred securities 2,388 - 2,388 -  Residential government-sponsored collateralized  mortgage obligations 50,766 - 50,766 -  Government-sponsored agency securities 3,226 - 3,226 -  Agency commercial mortgage-backed securities 27,898 - 27,898 -  SBA pool securities 24,789 - 24,789 -  $ 160,673 $ - $ 160,673 $ -      Fair Value Measurements Using  Significant  Quoted Prices in Other Significant  Active Markets for Observable Unobservable  Total at Identical Assets Inputs Inputs  (dollars in thousands) December 31, 2016 (Level 1) (Level 2) (Level 3)  Financial assets:  Available for sale investment securities  Obligations of states and political subdivisions $ 2,259 $ - $ 2,259 $ -  Trust preferred securities 1,659 - 1,659 -  $ 3,918 $ - $ 3,918 $ - 
Schedule of assets measured at fair value on non recurring basis	Assets measured at fair value on a non-recurring basis are summarized below:     Fair Value Measurements Using  Significant  Quoted Prices in Other Significant  Active Markets for Observable Unobservable  Total at Identical Assets Inputs Inputs  (dollars in thousands) December 31, 2017 (Level 1) (Level 2) (Level 3)  Impaired loans:  Commercial real estate - owner occupied $ 767 $ - $ - $ 767  Commercial real estate - non-owner occupied (1) 766 - - 766  Construction and land development 9,969 - - 9,969  Commercial loans 6,035 - - 6,035  Residential 1-4 family (2) 3,160 - - 3,160  Assets held for sale 1,927 - - 1,927  Other real estate owned:  Commercial real estate - owner occupied 1,060 - - 1,060  Construction and land development 3,229 - - 3,229  Residential 1-4 family (2) 3,288 - - 3,288      Fair Value Measurements Using  Significant  Quoted Prices in Other Significant  Active Markets for Observable Unobservable  Total at Identical Assets Inputs Inputs  (dollars in thousands) December 31, 2016 (Level 1) (Level 2) (Level 3)  Impaired loans:  Commercial real estate - owner occupied $ 6,121 $ - $ - $ 6,121  Commercial loans 5,630 - - 5,630  Residential 1-4 family (2) 963 - - 963  Other real estate owned:  Commercial real estate - owner occupied 1,110 - - 1,110  Commercial real estate - non-owner occupied (1) 237 - - 237  Construction and land development 3,863 - - 3,863  Residential 1-4 family (2) 3,407 - - 3,407  (1) Includes loans secured by farmland and multi-family residential loans. (2) Includes home equity lines of credit.
Schedule of estimated fair values and fair value hierarchy levels of financial instruments	The carrying amount, estimated fair values and fair value hierarchy levels (previously defined) of financial instruments were as follows (in thousands):    December 31, 2017 December 31, 2016  Fair Value Carrying Fair Carrying Fair  Hierarchy Level Amount Value Amount Value  Financial assets:  Cash and cash equivalents Level 1 $ 25,463 $ 25,463 $ 47,392 $ 47,392  Securities available for sale Level 2 160,673 160,673 3,918 3,918  Securities held to maturity Level 2 98,912 97,597 85,300 83,344  Stock in Federal Reserve Bank and Federal  Home Loan Bank n/a 26,775 n/a 7,929 n/a  Equity investment in mortgage affiliate Level 3 4,723 4,723 4,629 4,629  Preferred investment in mortgage affiliate Level 3 3,305 3,305 2,555 2,555  Net loans Level 3 2,052,931 2,058,779 921,805 935,258  Accrued interest receivable Level 2 & Level 3 8,073 8,073 3,202 3,202  FDIC indemnification asset Level 3 1,353 309 2,111 528  Financial liabilities:  Demand deposits Level 1 649,067 649,067 124,779 124,779  Money market and savings accounts Level 1 517,031 517,031 182,590 182,590  Certificates of deposit Level 3 699,058 694,368 605,613 605,394  Securities sold under agreements  to repurchase Level 1 15,468 15,468 - -  FHLB short term advances Level 1 335,615 335,615 95,000 95,000  Junior subordinated debt Level 2 9,534 12,043 - -  Senior subordinated notes Level 2 47,128 58,163 - -  Accrued interest payable Level 1 & Level 3 2,273 2,273 1,190 1,190    

BANK PREMISES AND EQUIPMENT (Ta

BANK PREMISES AND EQUIPMENT (Tables)	12 Months Ended
	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Schedule of bank premises and equipment	 Bank premises and equipment as of December 31, 2017 and 2016 were as follows (in thousands):     2017 2016  Land $ 8,133 $ 2,261  Land improvements 2,027 -  Building and improvements 33,928 5,842  Leasehold improvements 3,217 2,428  Furniture and equipment 20,022 4,332  Construction in progress 41 -  67,368 14,863  Less accumulated depreciation and amortization 31,580 6,636  Bank premises and equipment, net $ 35,788 $ 8,227 
Schedule of future minimum rental payments required under non-cancelable operating leases for bank premises	Future minimum rental payments required under non-cancelable operating leases for bank premises that have initial or remaining terms in excess of one year as of December 31, 2017 are as follows (in thousands):    2018 $ 2,554  2019 2,208  2020 1,767  2021 1,102  2022 1,074  Thereafter 3,141  Total $ 11,846 

GOODWILL AND INTANGIBLE ASSETS

GOODWILL AND INTANGIBLE ASSETS (Tables)	12 Months Ended
	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of acquired intangible assets	Intangible assets were as follows at year end (in thousands):     December 31, 2017  Gross Carrying Accumulated Net Carrying  Value Amortization Value  Amortizable core deposit intangibles $ 17,503 $ (7,449) $ 10,054   December 31, 2016  Gross Carrying Accumulated Net Carrying  Value Amortization Value  Amortizable core deposit intangibles $ 7,477 $ (6,603) $ 874 
Schedule of estimated amortization expense of intangibles	Estimated amortization expense of intangibles for the years ended December 31 were as follows (in thousands):     2018 $ 1,471  2019 1,438  2020 1,377  2021 1,377  2022 1,337  Thereafter 3,203  Total $ 10,203 

FDIC INDEMNIFICATION ASSET (Tab

FDIC INDEMNIFICATION ASSET (Tables)	12 Months Ended
	Dec. 31, 2017
Fdic Indemnification Asset [Abstract]
Schedule of changes in the indemnification asset	The following table presents changes in the indemnification asset for the periods indicated (in thousands):    2017 2016  Balance as of January 1 $ 2,111 $ 2,922  Payments from FDIC (46) (18)  Amortization (712) (793)  Balance as of December 31 $ 1,353 $ 2,111 

DEPOSITS (Tables)

DEPOSITS (Tables)	12 Months Ended
	Dec. 31, 2017
Deposits [Abstract]
Schedule of scheduled maturities of time deposits	At December 31, 2017, the scheduled maturities of time deposits are as follows (in thousands):      2018 $ 402,078  2019 190,455  2020 49,378  2021 34,325  2022 22,822  Total $ 699,058 
Schedule of maturities of certificates of deposit	The following table sets forth the maturities of certificates of deposit of $250 thousand and over as of December 31, 2017 (in thousands):     Within 3 to 6 6 to 12 Over 12  3 Months Months Months Months Total  $ 26,041 $ 23,576 $ 28,589 $ 92,807 $ 171,013 

SECURITIES SOLD UNDER AGREEME39

SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE AND OTHER SHORT-TERM BORROWINGS (Tables)	12 Months Ended
	Dec. 31, 2017
Securities Sold Under Agreements To Repurchase And Other Short Term Borrowings [Abstract]
Schedule of other short-term borrowings	Other short-term borrowings consist of the following (in thousands):    December 31,  2017 2016 2015   FHLB overnight advances $ 56,860 $ 50,000 $ 49,000  Other short-term FHLB advances maturing 6/27/2018 10,000 - -  Other short-term FHLB advances maturing 6/20/2018 27,200 - -  Other short-term FHLB advances maturing 6/14/2018 10,000 - -  Other short-term FHLB advances maturing 6/13/2018 80,640 - -  Other short-term FHLB advances maturing 6/12/2018 10,000 - -  Other short-term FHLB advances maturing 3/28/2018 30,000 - -  Other short-term FHLB advances maturing 3/14/2018 80,640 - -  Other short-term FHLB advances maturing 3/13/2018 30,275 - -  Other short-term FHLB advances maturing 3/27/2017 - 10,000 -  Other short-term FHLB advances maturing 5/4/2017 - 10,000 -  Other short-term FHLB advances maturing 6/5/2017 - 10,000 -  Other short-term FHLB advances maturing 6/19/2017 - 5,000 -  Other short-term FHLB advances maturing 12/15/2017 - 10,000 -  Other short-term FHLB advances maturing 11/4/2016 - - 10,000  Securities sold under agreements to repurchase 15,468 - 10,381  Total $ 351,083 $ 95,000 $ 69,381   Weighted average interest rate at year end 1.50% 0.86% 0.51%   For the periods ended December 31, 2017, 2016 and 2015:  Average outstanding balance $ 177,983 $ 66,864 $ 34,673  Average interest rate during the year 1.24% 0.74% 0.76%   Maximum month-end outstanding balance $ 351,083 $ 95,000 $ 69,381 

INCOME TAXES (Tables)

INCOME TAXES (Tables)	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Schedule of net deferred tax assets	Net deferred tax assets at December 31, 2017 and 2016 consist primarily of the following: (in thousands):     2017 2016  Deferred tax assets:  Allowance for loan losses $ 2,100 $ 2,997  Organization costs 78 72  Unearned loan fees and other 987 656  Other real estate owned write-downs 794 945  Other than temporary impairment charge 235 369  Net unrealized loss on investment securities available for sale 367 406  Purchase accounting 3,411 934  Federal net operating loss carryforward 4,845 -  Federal AMT credit carryforward 1,137 -  Federal low income housing credit carryforward 2,386 -  Deferred compensation 1,114 878  Other 712 871  Total deferred tax assets 18,166 8,128  Deferred tax liabilities:  FDIC indemnification asset 300 735  Depreciation 963 613  Total deferred tax liabilities 1,263 1,348  Net deferred tax assets $ 16,903 $ 6,780 
Schedule of provision for income taxes	The provision for income taxes consists of the following for the years ended December 31, 2017, 2016 and 2015 (in thousands):    2017 2016 2015  Current tax expense  Federal $ 3,145 $ 4,781 $ 2,367  State 316 285 168  Total current tax expense 3,461 5,066 2,535   Deferred tax benefit  Federal 10,234 28 2,123  State (548) 1 9  Total deferred tax expense 9,686 29 2,132  Total income tax expense $ 13,147 $ 5,095 $ 4,667 
Schedule of income tax expense determined by applying the U.S. Federal income tax rate	The income tax expense differed from the amount of income tax determined by applying the U.S. Federal income tax rate of 34% to pretax income for the years ended December 31, 2017, 2016 and 2015 due to the following (in thousands):     2017 2016 2015  Computed expected tax expense at statutory rate $ 5,294 $ 5,238 $ 4,745  Reduction in tax expense resulting from:  Income from bank-owned life insurance (316) (238) (216)  Other, net 234 95 138  Transaction costs 724 - -  Provisional tax adjustment related to reduction in U.S.  federal statutory income tax rate 7,211 - -  Income tax expense $ 13,147 $ 5,095 $ 4,667 

STOCK- BASED COMPENSATION (Tabl

STOCK- BASED COMPENSATION (Tables)	12 Months Ended
	Dec. 31, 2017
Disclosure Of Compensation Related Costs, Share-Based Payments [Abstract]
Schedule of weighted-average assumptions used to value options	The following weighted-average assumptions were used to value options granted in the years indicated:    2016 2015  Expected life 10 years 10 years  Expected volatility 14.16% 14.71%  Risk-free interest rate 1.62% 2.26%  Weighted average fair value per option granted $ 0.63 $ 0.51  Dividend yield 4.44% 5.51% 
Schedule of activity in the stock option plan	A summary of the activity in the stock option plan for 2017 follows:    Weighted  Weighted Average Aggregate  Average Remaining Intrinsic  Exercise Contractual Value  Shares Price Term (in thousands)  Options outstanding, beginning of period 782,200 $ 9.56  Granted - -  Options issued in connection with EVBS merger 22,559 24.54  Forfeited (27,042) 21.44  Exercised (62,750) 8.84  Options outstanding, end of period 714,967 $ 9.83 5.6 $ 4,553   Exercisable at end of period 379,557 $ 8.74 4.1 $ 3,099 

EARNINGS PER SHARE (Tables)

EARNINGS PER SHARE (Tables)	12 Months Ended
	Dec. 31, 2017
Earnings Per Share [Abstract]
Schedule of reconciliation of the denominators of the basic and diluted earnings per share	The following is a reconciliation of the denominators of the basic and diluted EPS computations for 2017, 2016 and 2015 (dollars in thousands, except per share data):    Weighted  Average  Income Shares Per Share  (Numerator) (Denominator) Amount  For the year ended December 31, 2017  Basic EPS $ 2,425 18,391 $ 0.13  Effect of dilutive stock options and warrants - 281 -  Diluted EPS $ 2,425 18,672 $ 0.13  For the year ended December 31, 2016  Basic EPS $ 10,312 12,252 $ 0.84  Effect of dilutive stock options and warrants - 175 -  Diluted EPS $ 10,312 12,427 $ 0.83  For the year ended December 31, 2015  Basic EPS $ 9,289 12,224 $ 0.76  Effect of dilutive stock options and warrants - 106 -  Diluted EPS $ 9,289 12,330 $ 0.75 

REGULATORY MATTERS (Tables)

REGULATORY MATTERS (Tables)	12 Months Ended
	Dec. 31, 2017
Regulatory Matters [Abstract]
Schedule of capital amounts and ratios for southern national and sonabank	The capital amounts and ratios for Southern National and Sonabank at year end are presented in the following table (in thousands):    Required  For Capital To Be Categorized as  Actual Adequacy Purposes (1) Well Capitalized (2)  Amount Ratio Amount Ratio Amount Ratio  December 31, 2017  Southern National  Common equity tier 1 capital ratio $ 211,399 10.53% $ 90,300 4.50% n/a n/a  Tier 1 risk-based capital ratio 220,430 10.98% 120,399 6.00% n/a n/a  Total risk-based capital ratio 276,827 13.80% 160,533 8.00% n/a n/a  Leverage ratio 220,430 8.82% 100,022 4.00% n/a n/a  Sonabank  Common equity tier 1 capital ratio $ 256,615 12.79% $ 90,282 4.50% $ 130,407 6.50%  Tier 1 risk-based capital ratio 256,615 12.79% 120,375 6.00% 160,500 8.00%  Total risk-based capital ratio 266,012 13.26% 160,500 8.00% 200,626 10.00%  Leverage ratio 256,615 10.26% 100,040 4.00% 125,051 5.00%   December 31, 2016  Southern National  Common equity tier 1 capital ratio $ 116,076 12.69% $ 41,171 4.50% n/a n/a  Tier 1 risk-based capital ratio 116,076 12.69% 54,894 6.00% n/a n/a  Total risk-based capital ratio 124,686 13.63% 73,193 8.00% n/a n/a  Leverage ratio 116,076 10.56% 43,965 4.00% n/a n/a  Sonabank  Common equity tier 1 capital ratio $ 114,779 12.55% $ 41,151 4.50% $ 59,440 6.50%  Tier 1 risk-based capital ratio 114,779 12.55% 54,868 6.00% 73,157 8.00%  Total risk-based capital ratio 123,389 13.49% 73,157 8.00% 91,447 10.00%  Leverage ratio 114,779 10.45% 43,947 4.00% 54,934 5.00%  (1) When fully phased-in on January 1, 2019, the Basel III capital rules include a capital conservation buffer of 2.5% that is added on top of each of the minimum risk-based capital ratios noted above. Implementation began on January 1, 2016 at the 0.625% level and will increase each subsequent January 1, until it reaches 2.5% on January 1, 2019. (2) PCA provisions are not applicable at the bank holding company level.

PARENT COMPANY FINANCIAL INFO44

PARENT COMPANY FINANCIAL INFORMATION (Tables)	12 Months Ended
	Dec. 31, 2017
Condensed Financial Information Of Parent Company Only Disclosure [Abstract]
Schedule of condensed balance sheet of Southern National Bancorp of Virginia, Inc.	Condensed financial information of Southern National Bancorp of Virginia, Inc. follows (in thousands):    CONDENSED BALANCE SHEETS  DECEMBER 31,   2017 2016  ASSETS  Cash $ 4,535 $ 856  Investment in subsidiaries 369,266 125,047  Other assets 6,405 441  Total assets $ 380,206 $ 126,344   LIABILITIES AND STOCKHOLDERS' EQUITY  Liabilities:  Junior subordinated debt $ 9,534 $ -  Senior subordinated notes 47,128 -  Other liabilities 772 -  Total liabilities 57,434 -  Stockholders' equity:  Common stock 239 123  Additional paid in capital 304,932 104,884  Retained earnings 18,753 22,126  Accumulated other comprehensive loss (1,152) (789)  Total stockholders' equity 322,772 126,344  Total liabilities and stockholders' equity $ 380,206 $ 126,344 
Schedule of condensed statements of income of Southern National Bancorp of Virginia, Inc.	  CONDENSED STATEMENTS OF INCOME  FOR THE YEARS ENDED DECEMBER 31,   2017 2016 2015  Income:  Cash dividends received from subsidiary $ 4,900 $ 3,600 $ 6,300  Interest on deposit with subsidiary 3 - -  Total income 4,903 3,600 6,300  Expenses:  Interest on junior subordinated debt 253 - -  Interest on senior subordinated notes 2,194 - -  Merger expenses 2,812 - -  Other operating expenses 478 153 204  Total expenses 5,737 153 204  (Loss) income before income tax benefit and equity in  undistributed net income of subsidiary (834) 3,447 6,096  Income tax benefit (1,196) (52) (69)  Equity in undistributed net income of subsidiary 2,063 6,813 3,124  Net income $ 2,425 $ 10,312 $ 9,289 
Schedule of condensed statements of cash flows information of Southern National Bancorp of Virginia, Inc.	  CONDENSED STATEMENTS OF CASH FLOWS  FOR THE YEARS ENDED DECEMBER 31,   2017 2016 2015  Operating activities:  Net income $ 2,425 $ 10,312 $ 9,289  Adjustments to reconcile net income to net cash and  cash equivalents (used in) provided by operating activities:  Equity in undistributed net income of subsidiary (6,963) (10,413) (9,424)  Other, net 4,046 219 262  Net cash and cash equivalents (used in) provided by operating activities (492) 118 127  Investing activities:  Increase in investment in subsidiary (22,000) - -  Dividend from subsidiary 4,900 3,600 6,300  Acquisition of Eastern Virginia Bankshares, Inc. (10) - -  Net cash and cash equivalents (used in) provided by investing activities (17,110) 3,600 6,300  Financing activities:  Issuance of subordinated notes, net of cost 26,075 - -  Issuance of common stock 1,004 236 707  Repurchase of common stock - - (721)  Cash dividends paid on common stock (5,798) (3,921) (6,359)  Net cash and cash equivalents provided by (used in) financing activities 21,281 (3,685) (6,373)  Increase in cash and cash equivalents 3,679 33 54  Cash and cash equivalents at beginning of period 856 823 769  Cash and cash equivalents at end of period $ 4,535 $ 856 $ 823 

ACCUMULATED OTHER COMPREHENSI45

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Tables)	12 Months Ended
	Dec. 31, 2017
Statement Of Other Comprehensive Income [Abstract]
Schedule of the accumulated other comprehensive loss balances, net of tax	The following is a summary of the accumulated other comprehensive (loss) balances, net of tax (in thousands):     Balance at Current Period Balance at  December 31, 2016 Change December 31, 2017  Unrealized (loss) on investment securities available for sale $ (627) $ (372) $ (999)  Unrecognized gain on investment securities held to maturity for which other  than temporary impairment charges have been taken 311 - 311  Unrealized (loss) on investment securities available  for sale transferred to held to maturity (473) 9 (464)  

RELATED PARTY TRANSACTIONS (Tab

RELATED PARTY TRANSACTIONS (Tables)	12 Months Ended
	Dec. 31, 2017
Southern Trust Mortgage [Member]
Related Party Transaction [Line Items]
Schedule of changes in the loan amount outstanding during the periods	The following table summarizes the changes in the loan amount outstanding with STM during the periods indicated (in thousands):    2017 2016  Balance at January 1 $ 8,126 $ 10,438  Principal advances 238,503 149,725  Acquired from EVBS 13,044 -  Principal paid (233,906) (152,037)  Balance at December 31 $ 25,767 $ 8,126 
Officers and Directors and Principal Shareholders and Their Affiliates [Member].
Related Party Transaction [Line Items]
Schedule of changes in the loan amount outstanding during the periods	Loan activity to related parties is as follows (in thousands):     2017  Balance at January 1 $ -  Acquired from EVBS 7,871  Principal advances 2,498  Principal paid (1,020)  Balance at December 31 $ 9,349 

QUARTERLY FINANCIAL DATA (UNA47

QUARTERLY FINANCIAL DATA (UNAUDITED) (Tables)	12 Months Ended
	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Schedule of income statement information (unaudited)	  Interest Net Interest Income (Loss) Net Earnings (Loss) Per Share  Income Income Before Taxes Income (Loss) Basic Diluted   (dollars in thousands, except per share amounts)  2017  First quarter $ 12,545 $ 9,891 $ 3,221 $ 2,054 $ 0.17 $ 0.16  Second quarter 14,249 11,205 (3,804) (2,842) (0.21) (0.21)  Third quarter 28,811 23,850 6,463 4,374 0.18 0.18  Fourth quarter 27,965 22,971 9,692 (1,161) (0.05) (0.05)   2016  First quarter $ 11,673 $ 9,712 $ 3,555 $ 2,566 $ 0.21 $ 0.21  Second quarter 12,291 10,174 4,182 2,789 0.23 0.23  Third quarter 12,619 10,373 4,140 2,765 0.23 0.22  Fourth quarter 12,364 10,055 3,530 2,192 0.18 0.18 

ORGANIZATION AND SIGNIFICANT 48

ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES (Narrative 1) (Details) $ in Thousands	Jun. 23, 2017	Dec. 31, 2017USD ($)property	May 15, 2014
Organization And Significant Accounting Policies [Line Items]
Additional equity method investment ownership percentage	4.90%
Scenario, Plan [Member]
Organization And Significant Accounting Policies [Line Items]
Expected increase to AOCL		$ 227
GAB acquisition [Member]
Organization And Significant Accounting Policies [Line Items]
Loss sharing agreement		$ 143,400
Southern Trust Mortgage [Member]
Organization And Significant Accounting Policies [Line Items]
Percentage of equity investment and preferred stock of STM		48.90%	44.00%
Sonabank [Member] | Virginia [Member]
Organization And Significant Accounting Policies [Line Items]
Number of branches | property		38

ORGANIZATION AND SIGNIFICANT 49

ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES (Narrative 2) (Details)	12 Months Ended
	Dec. 31, 2017
Building and Improvements [Member]
Property, Plant and Equipment [Line Items]
Depreciation method	straight-line method
Useful lives	30 years
Furniture, Fixtures and Equipment [Member]
Property, Plant and Equipment [Line Items]
Depreciation method	straight-line method
Minimum [Member] | Furniture, Fixtures and Equipment [Member]
Property, Plant and Equipment [Line Items]
Useful lives	3 years
Maximum [Member] | Furniture, Fixtures and Equipment [Member]
Property, Plant and Equipment [Line Items]
Useful lives	10 years

ORGANIZATION AND SIGNIFICANT 50

ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES (Narrative 3) (Details) - Core Deposits [Member]	12 Months Ended
	Dec. 31, 2017
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	6 years
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets	15 years

ORGANIZATION AND SIGNIFICANT 51

ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES (Narrative 4) (Details) $ in Thousands	Dec. 22, 2017	Dec. 31, 2017USD ($)segmentagreement	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Organization And Significant Accounting Policies [Line Items]
Percentage of capital, par value FRB stock required to own		6.00%
Amount to be recover from FDIC under indemnification agreement | $		$ 309	$ 309
FDIC indemnification asset | $		$ 1,353	2,111	$ 2,922
Number of agreement with FDIC | agreement		2
Number of reportable segment | segment		1
Number of operating segments | segment		1
Restricted cash on hand or on deposit with Federal Reserve Bank | $			$ 2,900
U.S. Federal income tax rate		34.00%	34.00%	34.00%
Single Family Assets [Member]
Organization And Significant Accounting Policies [Line Items]
Term of FDIC agreement		10 years
Number of agreement with FDIC | agreement		1
Non Single Family Commercial Assets [Member]
Organization And Significant Accounting Policies [Line Items]
Term of FDIC agreement		5 years
Number of agreement with FDIC | agreement		1
Scenario, Plan [Member]
Organization And Significant Accounting Policies [Line Items]
U.S. Federal income tax rate	21.00%	21.00%

BUSINESS COMBINATIONS (Narrativ

BUSINESS COMBINATIONS (Narrative) (Details) - USD ($)	Jun. 23, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Goodwill, acquired during period		$ 90,100,000
Goodwill		100,606,000	$ 10,514,000
Unpaid principal balance of loans		27,872,000	10,308,000
Fair value of bank-owned real estate	$ 3,100,000
Acquisition-related expenses		$ 9,400,000	$ 429,000	$ 0
Eastern Virginia Bankshares Inc [Member]
Business Acquisition [Line Items]
Value of SNBV common stock	198,909,000
Goodwill, acquired during period	90,100,000
Goodwill	90,102,000
Amount of loans	1,031,982,000
Unpaid principal balance of loans	1,050,000,000
Amount of discount	21,400,000
Loans held for sale	19,689,000
Core deposit intangible	$ 10,025,000
Percentage of core deposits to total deposits	0.90%
Estimated fair value adjustment of time deposits	$ 1,200,000
Amortized over weighted average remaining life	18 months
Estimated fair value adjustment of junior subordinated debt	$ 9,509,000
Debt Instrument remaining discount amortization period	96 months
Eastern Virginia Bankshares Inc [Member] | Junior Subordinated Debt [Member]
Business Acquisition [Line Items]
Discount on accreted over remaining life	195 months
Eastern Virginia Bankshares Inc [Member] | Senior Subordinated Notes [Member]
Business Acquisition [Line Items]
Debt Instrument remaining discount amortization period	95 months
Eastern Virginia Bankshares Inc [Member] | Scenario, Adjustment [Member]
Business Acquisition [Line Items]
Amount of loans	$ (13,618,000)
Core deposit intangible	9,590,000
Estimated fair value adjustment of junior subordinated debt	(801,000)
Fair value adjustment, senior subordinated debt, net of issuance costs	$ 1,900,000
Eastern Virginia Bankshares Inc [Member] | Series B Preferred Stock [Member]
Business Acquisition [Line Items]
Number of shares issued for each outstanding share of EVBS	0.6313
Eastern Virginia Bankshares Inc [Member] | Common Stock [Member]
Business Acquisition [Line Items]
Number of shares issued for each outstanding share of EVBS	0.6313
Closing common stock price	$ 17.21

BUSINESS COMBINATIONS (Schedule

BUSINESS COMBINATIONS (Schedule of Business Acquisitions) (Details) - USD ($) $ in Thousands	Jun. 23, 2017	Dec. 31, 2017	Dec. 31, 2016
Identifiable liabilities assumed:
Goodwill		$ 100,606	$ 10,514
Eastern Virginia Bankshares Inc [Member]
Consideration paid:
Cash	$ 10
SNBV common stock	198,909
Total consideration paid	198,919
Identifiable assets acquired:
Cash and due from banks	4,350
Interest bearing deposits with banks	18,993
Federal funds sold	682
Securities available for sale, at fair value	162,879
Securities held to maturity, at carrying value	19,544
Restricted securities, at cost	6,734
Amount of loans	1,031,982
Loans held for sale	19,689
Deferred income taxes	20,647
Bank premises and equipment	28,352
Assets held for sale	1,927
Accrued interest receivable	4,272
Other real estate owned	547
Core deposit intangible	10,025
Bank owned life insurance	26,035
Other assets	10,004
Total identifiable assets acquired	1,366,662
Identifiable liabilities assumed:
Noninterest-bearing demand accounts	226,637
Interest-bearing deposits	921,925
Federal funds purchased and repurchase agreements	7,598
Federal Home Loan Bank advances	57,475
Junior subordinated debt	9,509
Senior subordinated notes	21,051
Accrued interest payable	902
Other liabilities	12,748
Total identifiable liabilities assumed	1,257,845
Net identifiable assets acquired	108,817
Goodwill	90,102
Eastern Virginia Bankshares Inc [Member] | Scenario, Previously Reported [Member]
Identifiable assets acquired:
Cash and due from banks	4,350
Interest bearing deposits with banks	18,993
Federal funds sold	682
Securities available for sale, at fair value	163,029
Securities held to maturity, at carrying value	19,036
Restricted securities, at cost	6,734
Amount of loans	1,045,600
Loans held for sale	19,689
Deferred income taxes	15,735
Bank premises and equipment	24,242
Assets held for sale	2,970
Accrued interest receivable	4,272
Other real estate owned	563
Core deposit intangible	435
Bank owned life insurance	26,035
Other assets	10,004
Total identifiable assets acquired	1,362,369
Identifiable liabilities assumed:
Noninterest-bearing demand accounts	226,637
Interest-bearing deposits	920,743
Federal funds purchased and repurchase agreements	7,598
Federal Home Loan Bank advances	57,475
Junior subordinated debt	10,310
Senior subordinated notes	19,175
Accrued interest payable	902
Other liabilities	12,748
Total identifiable liabilities assumed	1,255,588
Net identifiable assets acquired	106,781
Eastern Virginia Bankshares Inc [Member] | Scenario, Adjustment [Member]
Identifiable assets acquired:
Securities available for sale, at fair value	(150)
Securities held to maturity, at carrying value	508
Amount of loans	(13,618)
Deferred income taxes	4,912
Bank premises and equipment	4,110
Assets held for sale	(1,043)
Other real estate owned	(16)
Core deposit intangible	9,590
Total identifiable assets acquired	4,293
Identifiable liabilities assumed:
Interest-bearing deposits	1,182
Junior subordinated debt	(801)
Senior subordinated notes	1,876
Total identifiable liabilities assumed	2,257
Net identifiable assets acquired	$ 2,036

BUSINESS COMBINATIONS (Schedu54

BUSINESS COMBINATIONS (Schedule of amortization and accretion of premiums and discounts associated with acquisition accounting adjustments to assets acquired and liabilities) (Details) - Eastern Virginia Bankshares Inc [Member] $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)
Business Acquisition [Line Items]
Loans	$ 2,800
Time deposits	407
Junior and senior subordinated debt	43
Core deposit intangible	(651)
Net impact to income before income taxes	$ 2,599

BUSINESS COMBINATIONS (Schedu55

BUSINESS COMBINATIONS (Schedule of loans and debt securities acquired with deteriorated credit quality) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Jun. 23, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Accretable difference	$ 17,500		$ 6,500
Eastern Virginia Bankshares Inc [Member]
Business Acquisition [Line Items]
Contractually required principal and interest at acquisition		$ 17,970
Contractual cash flows not expected to be collected (nonaccretable difference)		(6,243)
Expected cash flows at acquisition		11,727
Accretable difference		398
Basis in acquired loans at acquisition - estimated fair value		$ 11,329

BUSINESS COMBINATIONS (Schedu56

BUSINESS COMBINATIONS (Schedule of unaudited pro forma) (Details) - Eastern Virginia Bankshares Inc [Member] - Pro Forma [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Net interest income	$ 91,010	$ 85,114
Net income	$ 9,555	$ 18,354
Earnings per share, basic	$ 0.40	$ 0.77
Earnings per share, diluted	$ 0.39	$ 0.76
Weighted average shares outstanding - Basic	23,923,410	23,923,410
Weighted average shares outstanding - Diluted	24,228,054	24,228,054

INVESTMENT SECURITIES (Narrativ

INVESTMENT SECURITIES (Narrative) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Sale of investment available-for-sale		$ 4,767,000		$ 3,966,000
Realized gain from transaction		257,000
Realized loss from transaction		$ 2,000
Other than temporary impairment performing collateral will default or defer per annum		0.50%
Recoveries ranging		9.00%
Lag period on all default and deferrals		2 years
Period of no prepayments for security		10 years
Percentage of prepayments for remaining life of the security		1.00%
OTTI charges related to credit		$ 0	$ 0	$ 0
Residential Mortgage Backed Securities [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Sale of investment available-for-sale		3,200,000
Mortgage-backed securities
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Sale of investment available-for-sale		1,300,000
Number of preferred stock sold	5
Realized gain from transaction	$ 914,000
Realized loss from transaction	$ 394,000
US Government Agencies Debt Securities [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Sale of investment available-for-sale		5,700,000
Federal Home Loan Bank of Atlanta [Member]
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Sale of investment available-for-sale		173,400,000	$ 73,900,000
Unrealized gain (loss) on securities		$ 196,900,000

INVESTMENT SECURITIES (Schedule

INVESTMENT SECURITIES (Schedule of amortized cost and fair value of securities available-for-sale) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 162,189	$ 4,870
Gross Unrealized Gains	261	9
Gross Unrealized Losses	(1,777)	(961)
Available for sale, fair value	160,673	3,918
US Government Agencies Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	31,145
Gross Unrealized Gains	3
Gross Unrealized Losses	(284)
Available for sale, fair value	30,864
US States and Political Subdivisions Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	18,581	2,280
Gross Unrealized Gains	187	9
Gross Unrealized Losses	(41)	(30)
Available for sale, fair value	18,727	2,259
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	2,013
Gross Unrealized Gains	2
Available for sale, fair value	2,015
Trust preferred securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	2,590	2,590
Gross Unrealized Losses	(202)	(931)
Available for sale, fair value	2,388	$ 1,659
Residential Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	51,521
Gross Unrealized Gains	1
Gross Unrealized Losses	(756)
Available for sale, fair value	50,766
Government-Sponsored Agency Securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	3,247
Gross Unrealized Losses	(21)
Available for sale, fair value	3,226
Commercial Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	28,263
Gross Unrealized Losses	(365)
Available for sale, fair value	27,898
SBA Pool Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	24,829
Gross Unrealized Gains	68
Gross Unrealized Losses	(108)
Available for sale, fair value	$ 24,789

INVESTMENT SECURITIES (Schedu59

INVESTMENT SECURITIES (Schedule of amortized cost, unrecognized gains and losses, and fair value of held to maturity securities) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Schedule Of Available For Sale and Held To Maturity Securities [Line Items]
Amortized Cost	$ 98,912	$ 85,300
Gross Unrecognized Gains	382	389
Gross Unrecognized Losses	(1,697)	(2,345)
Securities held to maturity fair value (in dollars)	97,597	83,344
Residential Mortgage Backed Securities [Member]
Schedule Of Available For Sale and Held To Maturity Securities [Line Items]
Amortized Cost	11,500	18,594
Gross Unrecognized Gains	23	308
Gross Unrecognized Losses	(77)	(118)
Securities held to maturity fair value (in dollars)	11,446	18,784
Mortgage-backed securities
Schedule Of Available For Sale and Held To Maturity Securities [Line Items]
Amortized Cost	8,727	2,371
Gross Unrecognized Losses	(99)	(54)
Securities held to maturity fair value (in dollars)	8,628	2,317
Government-Sponsored Agency Securities
Schedule Of Available For Sale and Held To Maturity Securities [Line Items]
Amortized Cost	52,650	47,975
Gross Unrecognized Gains	25	28
Gross Unrecognized Losses	(1,448)	(1,865)
Securities held to maturity fair value (in dollars)	51,227	46,138
US States and Political Subdivisions Debt Securities [Member]
Schedule Of Available For Sale and Held To Maturity Securities [Line Items]
Amortized Cost	22,830	12,706
Gross Unrecognized Gains	169	53
Gross Unrecognized Losses	(56)	(162)
Securities held to maturity fair value (in dollars)	22,943	12,597
Trust preferred securities
Schedule Of Available For Sale and Held To Maturity Securities [Line Items]
Amortized Cost	3,205	3,654
Gross Unrecognized Gains	165
Gross Unrecognized Losses	(17)	(146)
Securities held to maturity fair value (in dollars)	$ 3,353	$ 3,508

INVESTMENT SECURITIES (Schedu60

INVESTMENT SECURITIES (Schedule of fair value and carrying amount, if different, of debt securities, by contractual maturity) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Schedule Of Available For Sale and Held To Maturity Securities [Line Items]
Held to Maturity, due in one to five years, amortized cost	$ 1,895
Held to Maturity, due in five to ten years, amortized cost	23,033
Held to maturity, due after ten years, amortized cost	53,757
Held to maturity, amortized cost	98,912
Held to Maturity, due in one to five years, fair value	1,892
Held to Maturity, due in five to ten years, fair value	22,616
Held to maturity, due after ten years, fair value	53,015
Held to maturity fair value	97,597	$ 83,344
Available for Sale, due in one to five years, amortized cost	1,932
Available for Sale, due in five to ten years, amortized cost	6,886
Available for sale, due after ten years, amortized cost	17,613
Available for sale, amortized cost	162,189
Available for Sale, due in one to five years, fair value	1,911
Available for Sale, due in five to ten years, fair value	6,925
Available for sale, due after ten years, fair value	17,520
Available for sale, Fair value	160,673
Residential Mortgage Backed Securities [Member]
Schedule Of Available For Sale and Held To Maturity Securities [Line Items]
Held to maturity, amortized cost	11,500
Held to maturity fair value	11,446	18,784
Available for sale, amortized cost	31,145
Available for sale, Fair value	30,864
Mortgage-backed securities
Schedule Of Available For Sale and Held To Maturity Securities [Line Items]
Held to maturity, amortized cost	8,727
Held to maturity fair value	8,628	$ 2,317
Available for sale, amortized cost	51,521
Available for sale, Fair value	50,766
Commercial Mortgage Backed Securities [Member]
Schedule Of Available For Sale and Held To Maturity Securities [Line Items]
Available for sale, amortized cost	28,263
Available for sale, Fair value	27,898
SBA Pool Securities [Member]
Schedule Of Available For Sale and Held To Maturity Securities [Line Items]
Available for sale, amortized cost	24,829
Available for sale, Fair value	$ 24,789

INVESTMENT SECURITIES (Schedu61

INVESTMENT SECURITIES (Schedule of present information regarding securities in a continuous unrealized loss position by duration of time in a loss position) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Schedule Of Available For Sale and Held To Maturity Securities [Line Items]
Available for sale, less than 12 months, fair value	$ 131,786	$ 1,706
Available for sale, less than 12 months, unrealized losses	(1,593)	(30)
Available for sale, 12 months or more, fair value	915	1,658
Available for sale, 12 months or more, unrealized losses	(184)	(931)
Available for sale, total fair value	132,701	3,364
Available for sale, total unrealized losses	(1,777)	(961)
Held to maturity, less than 12 months, fair value	20,158	56,272
Held to Maturity, less than 12 months unrecognized losses	(108)	(2,100)
Held to Maturity, 12 months or more, fair value	44,056	6,001
Held to Maturity, 12 months or more, unrecognized losses	(1,589)	(245)
Held to maturity, total fair value	64,214	62,273
Held to maturity, total unrecognized losses	(1,697)	(2,345)
US Government Agencies Debt Securities [Member]
Schedule Of Available For Sale and Held To Maturity Securities [Line Items]
Available for sale, less than 12 months, fair value	30,336
Available for sale, less than 12 months, unrealized losses	(284)
Available for sale, total fair value	30,336
Available for sale, total unrealized losses	(284)
US States and Political Subdivisions Debt Securities [Member]
Schedule Of Available For Sale and Held To Maturity Securities [Line Items]
Available for sale, less than 12 months, fair value	4,642	1,706
Available for sale, less than 12 months, unrealized losses	(41)	(30)
Available for sale, total fair value	4,642	1,706
Available for sale, total unrealized losses	(41)	(30)
Held to maturity, less than 12 months, fair value	7,918	3,578
Held to Maturity, less than 12 months unrecognized losses	(34)	(98)
Held to Maturity, 12 months or more, fair value	1,782	1,065
Held to Maturity, 12 months or more, unrecognized losses	(22)	(64)
Held to maturity, total fair value	9,700	4,643
Held to maturity, total unrecognized losses	(56)	(162)
Trust preferred securities
Schedule Of Available For Sale and Held To Maturity Securities [Line Items]
Available for sale, less than 12 months, fair value	1,473
Available for sale, less than 12 months, unrealized losses	(18)
Available for sale, 12 months or more, fair value	915	1,658
Available for sale, 12 months or more, unrealized losses	(184)	(931)
Available for sale, total fair value	2,388	1,658
Available for sale, total unrealized losses	(202)	(931)
Held to Maturity, 12 months or more, fair value	240	3,508
Held to Maturity, 12 months or more, unrecognized losses	(17)	(146)
Held to maturity, total fair value	240	3,508
Held to maturity, total unrecognized losses	(17)	(146)
Residential Mortgage Backed Securities [Member]
Schedule Of Available For Sale and Held To Maturity Securities [Line Items]
Available for sale, less than 12 months, fair value	50,555
Available for sale, less than 12 months, unrealized losses	(756)
Available for sale, total fair value	50,555
Available for sale, total unrealized losses	(756)
Held to maturity, less than 12 months, fair value	3,409	10,238
Held to Maturity, less than 12 months unrecognized losses	(26)	(110)
Held to Maturity, 12 months or more, fair value	2,986	457
Held to Maturity, 12 months or more, unrecognized losses	(51)	(8)
Held to maturity, total fair value	6,395	10,695
Held to maturity, total unrecognized losses	(77)	(118)
Government-Sponsored Agency Securities
Schedule Of Available For Sale and Held To Maturity Securities [Line Items]
Available for sale, less than 12 months, fair value	1,726
Available for sale, less than 12 months, unrealized losses	(21)
Available for sale, total fair value	1,726
Available for sale, total unrealized losses	(21)
Held to maturity, less than 12 months, fair value	1,719	41,110
Held to Maturity, less than 12 months unrecognized losses	(2)	(1,865)
Held to Maturity, 12 months or more, fair value	37,532
Held to Maturity, 12 months or more, unrecognized losses	(1,446)
Held to maturity, total fair value	39,251	41,110
Held to maturity, total unrecognized losses	(1,448)	(1,865)
Mortgage-backed securities
Schedule Of Available For Sale and Held To Maturity Securities [Line Items]
Available for sale, less than 12 months, fair value	27,898
Available for sale, less than 12 months, unrealized losses	(365)
Available for sale, total fair value	27,898
Available for sale, total unrealized losses	(365)
Held to maturity, less than 12 months, fair value	7,112	1,346
Held to Maturity, less than 12 months unrecognized losses	(46)	(27)
Held to Maturity, 12 months or more, fair value	1,516	971
Held to Maturity, 12 months or more, unrecognized losses	(53)	(27)
Held to maturity, total fair value	8,628	2,317
Held to maturity, total unrecognized losses	(99)	$ (54)
SBA Pool Securities [Member]
Schedule Of Available For Sale and Held To Maturity Securities [Line Items]
Available for sale, less than 12 months, fair value	15,156
Available for sale, less than 12 months, unrealized losses	(108)
Available for sale, total fair value	15,156
Available for sale, total unrealized losses	$ (108)

INVESTMENT SECURITIES (Schedu62

INVESTMENT SECURITIES (Schedule of owned pooled trust preferred securities) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)
Security
Par value - security	$ 3,453
Book value - security	3,205
Estimated fair value - security	3,353
Previously Recognized Cumulative Other Comprehensive Loss	230
Other than temporarily impaired
Par value - other than temporarily impaired	3,650
Book value - other than temporarily impaired	2,590
Estimated fair value - other than temporarily impaired	2,388
Cumulative Other Comprehensive Loss	1,060
Trust preferred securities
Other than temporarily impaired
Par value	7,103
Book value	5,795
Estimated fair value	5,741
Trust preferred securities | Alesco VII A1B Senior [Member]
Security
Par value - security	3,192
Book value - security	2,948
Estimated fair value - security	$ 3,113
Current Deferrals and Defaults - Security	18.00%
Previously Recognized Cumulative Other Comprehensive Loss	$ 226
Trust preferred securities | MMCF III B Senior Sub [Member]
Security
Par value - security	261
Book value - security	257
Estimated fair value - security	$ 240
Current Deferrals and Defaults - Security	32.00%
Previously Recognized Cumulative Other Comprehensive Loss	$ 4
Trust preferred securities | TPREF Funding II Mezzanine [Member]
Other than temporarily impaired
Par value - other than temporarily impaired	1,500
Book value - other than temporarily impaired	1,099
Estimated fair value - other than temporarily impaired	$ 915
Current Deferrals and Defaults - other than temporarily impaired	29.00%
Cumulative OTTI Related to Credit Loss	$ 400
Trust preferred securities | ALESCO V C1 Mezzanine [Member]
Other than temporarily impaired
Par value - other than temporarily impaired	2,150
Book value - other than temporarily impaired	1,491
Estimated fair value - other than temporarily impaired	$ 1,473
Current Deferrals and Defaults - other than temporarily impaired	14.00%
Cumulative OTTI Related to Credit Loss	$ 660

INVESTMENT SECURITIES (Schedu63

INVESTMENT SECURITIES (Schedule of credit losses recognized in earnings) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Amount of cumulative other-than-temporary impairment related to credit loss prior to January 1	$ 1,060	$ 1,060	$ 8,949
Amounts related to credit loss for which an other-than-temporary impairment was previously recognized			(7,889)
Amount of cumulative other-than-temporary impairment related to credit loss as of December 31	$ 1,060	$ 1,060	$ 1,060

INVESTMENT SECURITIES (Schedu64

INVESTMENT SECURITIES (Schedule of changes in accumulated other comprehensive income by component) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ (789)	$ (610)	$ (3,020)
Other comprehensive income/(loss) before reclassifications	(618)	(179)	(413)
Amounts reclassified from accumulated other comprehensive income/(loss)	255		2,823
Net current-period other comprehensive income/(loss)	(363)	(179)	2,410
Ending balance	(1,152)	(789)	(610)
Held-to-maturity Securities [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(162)	(170)	(3,014)
Other comprehensive income/(loss) before reclassifications	(246)	8	21
Amounts reclassified from accumulated other comprehensive income/(loss)	255		2,823
Net current-period other comprehensive income/(loss)	9	8	2,844
Ending balance	(153)	(162)	(170)
Unrealized gains (losses) on securities available for sale
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(627)	(440)	(6)
Other comprehensive income/(loss) before reclassifications	(372)	(187)	(434)
Net current-period other comprehensive income/(loss)	(372)	(187)	(434)
Ending balance	$ (999)	$ (627)	$ (440)

LOANS AND ALLOWANCE FOR LOAN LO

LOANS AND ALLOWANCE FOR LOAN LOSSES (Narrative) (Details) $ in Thousands	Jun. 23, 2017USD ($)	Dec. 31, 2017USD ($)agreement	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)contract
Accounts Notes And Loans Receivable [Line Items]
Unpaid principal balance of loans		$ 27,872	$ 10,308
Total loans		2,062,916	932,304
Accretable discount on acquired EVBS, GAB, PGFSB and HarVest loans		17,500	6,500
TDR, subsequent default, number of contracts | contract				1
TDR, subsequent default, amount				$ 672
Mortgage loans in process of foreclosure, amount		939	1,800
Financing receivable, recorded investment, nonaccrual status		18,025	4,645
Small Business Administration Loan [Member]
Accounts Notes And Loans Receivable [Line Items]
Financing receivable, recorded investment, nonaccrual status		4,700	2,200
Eastern Virginia Bankshares Inc [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans held for sale	$ 19,689
Unpaid principal balance of loans	1,050,000
Amount of loans	1,031,982
Assets, fair value adjustment	13,600
Accretable discount on the acquired covered loans		2,800
Total loans		942,781
Accretable discount on acquired EVBS, GAB, PGFSB and HarVest loans	$ 398
GAB acquisition [Member]
Accounts Notes And Loans Receivable [Line Items]
Loss sharing agreement		143,400
Total loans		27,182	33,444
HarVest acquisition
Accounts Notes And Loans Receivable [Line Items]
Total loans		19,197	22,995
Prince George Federal Savings Bank [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans		$ 36,255	42,354
Federal Deposit Insurance Corporation [Member]
Accounts Notes And Loans Receivable [Line Items]
Number of agreements | agreement		2
Federal Deposit Insurance Corporation [Member] | GAB acquisition [Member]
Accounts Notes And Loans Receivable [Line Items]
Loss sharing agreement		$ 143,400
Federal Deposit Insurance Corporation [Member] | Non-covered Loans [Member] | Eastern Virginia Bankshares Inc [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans		942,800
Federal Deposit Insurance Corporation [Member] | Non-covered Loans [Member] | GAB acquisition [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans		3,900
Federal Deposit Insurance Corporation [Member] | Non-covered Loans [Member] | HarVest acquisition
Accounts Notes And Loans Receivable [Line Items]
Total loans		19,200
Federal Deposit Insurance Corporation [Member] | Non-covered Loans [Member] | Prince George Federal Savings Bank [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans		$ 36,300
Federal Deposit Insurance Corporation [Member] | Single Family Loans [Member] | GAB acquisition [Member]
Accounts Notes And Loans Receivable [Line Items]
Term loan agreement expiring		10 years
Federal Deposit Insurance Corporation [Member] | Non Single Family Commercial [Member] | GAB acquisition [Member]
Accounts Notes And Loans Receivable [Line Items]
Term loan agreement expiring		5 years
Residential Portfolio Segment [Member]
Accounts Notes And Loans Receivable [Line Items]
Mortgage loans on real estate, foreclosures		$ 3,300	$ 3,400

LOANS AND ALLOWANCE FOR LOAN 66

LOANS AND ALLOWANCE FOR LOAN LOSSES (Schedule of loans, net of unearned income) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Accounts Notes And Loans Receivable [Line Items]
Total real estate loans	$ 1,770,284	$ 816,083
Gross loans	2,062,916	932,304
Less deferred fees on loans	(588)	(1,889)
Loans, net of deferred fees	2,062,328	930,415
Commercial Real Estate Owner Occupied
Accounts Notes And Loans Receivable [Line Items]
Total real estate loans	401,847	154,807
Gross loans	401,847	154,807
Commercial Real Estate Non-owner Occupied
Accounts Notes And Loans Receivable [Line Items]
Total real estate loans	440,700	279,634
Gross loans	534,630	310,196
Loans And Leases Receivable Secured By Farmland [Member]
Accounts Notes And Loans Receivable [Line Items]
Total real estate loans	23,038	541
Construction and Land Development
Accounts Notes And Loans Receivable [Line Items]
Total real estate loans	197,972	91,067
Gross loans	197,972	91,067
1-4 Family Residential
Accounts Notes And Loans Receivable [Line Items]
Total real estate loans	483,006	230,810
Gross loans	635,835	260,013
Loans And Leases Receivable Multi Family Residential [Member]
Accounts Notes And Loans Receivable [Line Items]
Total real estate loans	70,892	30,021
Home Equity Line Of Credit [Member]
Accounts Notes And Loans Receivable [Line Items]
Total real estate loans	152,829	29,203
Commercial Portfolio Segment [Member]
Accounts Notes And Loans Receivable [Line Items]
Total real estate loans	253,258	115,365
Gross loans	253,258	115,365
Consumer Portfolio Segment [Member]
Accounts Notes And Loans Receivable [Line Items]
Total real estate loans	39,374	856
GAB acquisition [Member]
Accounts Notes And Loans Receivable [Line Items]
Gross loans	27,182	33,444
GAB acquisition [Member] | 1-4 Family Residential
Accounts Notes And Loans Receivable [Line Items]
Total real estate loans	23,300
Gross loans	23,339	$ 28,180
GAB acquisition [Member] | Home Equity Line Of Credit [Member]
Accounts Notes And Loans Receivable [Line Items]
Total real estate loans	$ 28,200

LOANS AND ALLOWANCE FOR LOAN 67

LOANS AND ALLOWANCE FOR LOAN LOSSES (Schedule of summary of impaired loans) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
With no related allowance recorded
With no related allowance recorded - Recorded Investment	$ 20,697	$ 9,548
With no related allowance recorded - Unpaid Principal Balance	27,872	10,308
With an allowance recorded
With an allowance recorded - Recorded Investment		4,066
With an allowance recorded - Unpaid Principal Balance		6,486
With an allowance recorded - Allowance for Loan Losses Allocated		900
Recorded Investment, Grand total	20,697	13,614
Unpaid Principal Balance, Grand total	27,872	16,794
Charge off on recorded investment	6,800	3,000
Commercial Real Estate Owner Occupied
With no related allowance recorded
With no related allowance recorded - Recorded Investment	767	5,583
With no related allowance recorded - Unpaid Principal Balance	781	5,592
With an allowance recorded
With an allowance recorded - Recorded Investment		688
With an allowance recorded - Unpaid Principal Balance		688
With an allowance recorded - Allowance for Loan Losses Allocated		150
Commercial Real Estate Non-owner Occupied
With no related allowance recorded
With no related allowance recorded - Recorded Investment	766
With no related allowance recorded - Unpaid Principal Balance	830
Construction and Land Development
With no related allowance recorded
With no related allowance recorded - Recorded Investment	9,969
With no related allowance recorded - Unpaid Principal Balance	9,984
Commercial Mortgage Loan
With no related allowance recorded
With no related allowance recorded - Recorded Investment	6,035	3,002
With no related allowance recorded - Unpaid Principal Balance	12,847	3,603
With an allowance recorded
With an allowance recorded - Recorded Investment		3,378
With an allowance recorded - Unpaid Principal Balance		5,798
With an allowance recorded - Allowance for Loan Losses Allocated		750
1-4 Family Residential
With no related allowance recorded
With no related allowance recorded - Recorded Investment	3,160	963
With no related allowance recorded - Unpaid Principal Balance	3,430	1,113
Small Business Administration Loan [Member]
With an allowance recorded
Recorded Investment, Grand total	$ 5,000	$ 2,200

LOANS AND ALLOWANCE FOR LOAN 68

LOANS AND ALLOWANCE FOR LOAN LOSSES (Schedule of details of average recorded investment and interest income for impaired loans recognized by class of loans) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
With no related allowance recorded
With no related allowance recorded, Average Recorded Investment	$ 27,760	$ 10,433	$ 12,996
With no related allowance recorded, Interest Income Recognized	805	381	334
With an allowance recorded
With an allowance recorded, Average Recorded Investment		4,096	6,256
With an allowance recorded, Interest IncomeRecognized		186	255
Average Recorded Investment, Grand total	27,760	14,529	19,252
Interest Income Recognized, Grand total	805	567	589
Commercial Real Estate Owner Occupied
With no related allowance recorded
With no related allowance recorded, Average Recorded Investment	875	6,454	7,156
With no related allowance recorded, Interest Income Recognized	34	292	297
With an allowance recorded
With an allowance recorded, Average Recorded Investment		694	2,259
With an allowance recorded, Interest IncomeRecognized		31	42
Commercial Real Estate Non-owner Occupied
With no related allowance recorded
With no related allowance recorded, Average Recorded Investment	890	103	822
With no related allowance recorded, Interest Income Recognized	56	3	11
Construction and Land Development
With no related allowance recorded
With no related allowance recorded, Average Recorded Investment	9,942		89
With no related allowance recorded, Interest Income Recognized	139
With an allowance recorded
With an allowance recorded, Average Recorded Investment			93
Commercial Mortgage Loan
With no related allowance recorded
With no related allowance recorded, Average Recorded Investment	12,655	2,888	3,428
With no related allowance recorded, Interest Income Recognized	485	54
With an allowance recorded
With an allowance recorded, Average Recorded Investment		3,402	3,488
With an allowance recorded, Interest IncomeRecognized		155	213
1-4 Family Residential
With no related allowance recorded
With no related allowance recorded, Average Recorded Investment	3,398	988	1,501
With no related allowance recorded, Interest Income Recognized	$ 91	$ 32	26
With an allowance recorded
With an allowance recorded, Average Recorded Investment			$ 416

LOANS AND ALLOWANCE FOR LOAN 69

LOANS AND ALLOWANCE FOR LOAN LOSSES (Schedule of details of aging of the recorded investment in past due loans by class of loans) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Accounts Notes And Loans Receivable [Line Items]
Recorded Investment, Past Due	$ 5,999	$ 2,676
Recorded Investment, Nonaccrual Loans	18,025	4,645
Recorded Investment, Loans Not Past Due	2,038,892	924,983
Gross loans	2,062,916	932,304
Financing Receivables, 30 to 59 Days Past Due [Member]
Accounts Notes And Loans Receivable [Line Items]
Recorded Investment, Past Due	5,438	2,581
Financing Receivables, 60 to 89 Days Past Due [Member]
Accounts Notes And Loans Receivable [Line Items]
Recorded Investment, Past Due	561	95
Commercial Real Estate Owner Occupied
Accounts Notes And Loans Receivable [Line Items]
Recorded Investment, Past Due	687
Recorded Investment, Nonaccrual Loans		637
Recorded Investment, Loans Not Past Due	401,160	154,170
Gross loans	401,847	154,807
Commercial Real Estate Owner Occupied | Financing Receivables, 30 to 59 Days Past Due [Member]
Accounts Notes And Loans Receivable [Line Items]
Recorded Investment, Past Due	687
Commercial Real Estate Non-owner Occupied
Accounts Notes And Loans Receivable [Line Items]
Recorded Investment, Past Due	188
Recorded Investment, Loans Not Past Due	534,442	310,196
Gross loans	534,630	310,196
Commercial Real Estate Non-owner Occupied | Financing Receivables, 30 to 59 Days Past Due [Member]
Accounts Notes And Loans Receivable [Line Items]
Recorded Investment, Past Due	138
Commercial Real Estate Non-owner Occupied | Financing Receivables, 60 to 89 Days Past Due [Member]
Accounts Notes And Loans Receivable [Line Items]
Recorded Investment, Past Due	50
Construction and Land Development
Accounts Notes And Loans Receivable [Line Items]
Recorded Investment, Past Due	1,283
Recorded Investment, Nonaccrual Loans	9,969
Recorded Investment, Loans Not Past Due	186,720	91,067
Gross loans	197,972	91,067
Construction and Land Development | Financing Receivables, 30 to 59 Days Past Due [Member]
Accounts Notes And Loans Receivable [Line Items]
Recorded Investment, Past Due	1,134
Construction and Land Development | Financing Receivables, 60 to 89 Days Past Due [Member]
Accounts Notes And Loans Receivable [Line Items]
Recorded Investment, Past Due	149
Commercial Mortgage Loan
Accounts Notes And Loans Receivable [Line Items]
Recorded Investment, Past Due	496	1,349
Recorded Investment, Nonaccrual Loans	5,664	3,158
Recorded Investment, Loans Not Past Due	247,098	110,858
Gross loans	253,258	115,365
Commercial Mortgage Loan | Financing Receivables, 30 to 59 Days Past Due [Member]
Accounts Notes And Loans Receivable [Line Items]
Recorded Investment, Past Due	496	1,349
1-4 Family Residential
Accounts Notes And Loans Receivable [Line Items]
Recorded Investment, Past Due	3,287	1,327
Recorded Investment, Nonaccrual Loans	2,392	850
Recorded Investment, Loans Not Past Due	630,156	257,836
Gross loans	635,835	260,013
1-4 Family Residential | Financing Receivables, 30 to 59 Days Past Due [Member]
Accounts Notes And Loans Receivable [Line Items]
Recorded Investment, Past Due	2,926	1,232
1-4 Family Residential | Financing Receivables, 60 to 89 Days Past Due [Member]
Accounts Notes And Loans Receivable [Line Items]
Recorded Investment, Past Due	361	95
Other Consumer Loans
Accounts Notes And Loans Receivable [Line Items]
Recorded Investment, Past Due	58
Recorded Investment, Loans Not Past Due	39,316	856
Gross loans	39,374	$ 856
Other Consumer Loans | Financing Receivables, 30 to 59 Days Past Due [Member]
Accounts Notes And Loans Receivable [Line Items]
Recorded Investment, Past Due	57
Other Consumer Loans | Financing Receivables, 60 to 89 Days Past Due [Member]
Accounts Notes And Loans Receivable [Line Items]
Recorded Investment, Past Due	$ 1

LOANS AND ALLOWANCE FOR LOAN 70

LOANS AND ALLOWANCE FOR LOAN LOSSES (Schedule of Activity for Loan and Lease Losses By Class of Loan) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 8,610	$ 8,421	$ 7,414
Adjustments			(17)
Charge offs	(8,829)	(4,962)	(2,673)
Recoveries	991	239	526
Provision for loan losses	8,625	4,912	3,171
Ending balance	9,397	8,610	8,421
Commercial Real Estate Owner Occupied
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	905	1,185	855
Charge offs		(799)	(1,067)
Recoveries	132	8	18
Provision for loan losses	(347)	511	1,379
Ending balance	690	905	1,185
Commercial Real Estate Non-owner Occupied
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,484	1,222	1,123
Charge offs	(100)
Recoveries	299		18
Provision for loan losses	(362)	262	81
Ending balance	1,321	1,484	1,222
Construction and Land Development
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	752	865	1,644
Charge offs		(449)
Recoveries	1	121	139
Provision for loan losses	(61)	215	(918)
Ending balance	692	752	865
Commercial Mortgage Loan
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	3,366	3,041	2,063
Charge offs	(8,250)	(3,370)	(1,174)
Recoveries	538	96	91
Provision for loan losses	8,842	3,599	2,061
Ending balance	4,496	3,366	3,041
1-4 Family Residential
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	1,279	1,408	1,339
Adjustments			(17)
Charge offs	(369)	(22)	(413)
Recoveries	17	10	259
Provision for loan losses	659	(117)	240
Ending balance	1,586	1,279	1,408
Other Consumer Loans
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	78	48	53
Charge offs	(110)	(322)	(19)
Recoveries	4	4	1
Provision for loan losses	640	348	13
Ending balance	612	78	48
Unallocated
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	746	652	337
Provision for loan losses	$ (746)	94	315
Ending balance		$ 746	$ 652

LOANS AND ALLOWANCE FOR LOAN 71

LOANS AND ALLOWANCE FOR LOAN LOSSES (Schedule of allowance for loan losses and the recorded investment by portfolio segment) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Ending allowance balance attributable to loans:
Individually evaluated for impairment		$ 900
Collectively evaluated for impairment	$ 9,397	7,710
Total ending allowance	9,397	8,610	$ 8,421	$ 7,414
Loans:
Individually evaluated for impairment	20,697	13,614
Collectively evaluated for impairment	2,042,219	918,690
Total ending loan balances	2,062,916	932,304
Commercial Real Estate Owner Occupied
Ending allowance balance attributable to loans:
Individually evaluated for impairment		150
Collectively evaluated for impairment	690	755
Total ending allowance	690	905	1,185	855
Loans:
Individually evaluated for impairment	767	6,271
Collectively evaluated for impairment	401,080	148,536
Total ending loan balances	401,847	154,807
Commercial Real Estate Non-owner Occupied
Ending allowance balance attributable to loans:
Collectively evaluated for impairment	1,321	1,484
Total ending allowance	1,321	1,484	1,222	1,123
Loans:
Individually evaluated for impairment	766
Collectively evaluated for impairment	533,864	310,196
Total ending loan balances	534,630	310,196
Construction and Land Development
Ending allowance balance attributable to loans:
Collectively evaluated for impairment	692	752
Total ending allowance	692	752	865	1,644
Loans:
Individually evaluated for impairment	9,969
Collectively evaluated for impairment	188,003	91,067
Total ending loan balances	197,972	91,067
Commercial Mortgage Loan
Ending allowance balance attributable to loans:
Individually evaluated for impairment		750
Collectively evaluated for impairment	4,496	2,616
Total ending allowance	4,496	3,366	3,041	2,063
Loans:
Individually evaluated for impairment	6,035	6,380
Collectively evaluated for impairment	247,223	108,985
Total ending loan balances	253,258	115,365
1-4 Family Residential
Ending allowance balance attributable to loans:
Collectively evaluated for impairment	1,586	1,279
Total ending allowance	1,586	1,279	1,408	1,339
Loans:
Individually evaluated for impairment	3,160	963
Collectively evaluated for impairment	632,675	259,050
Total ending loan balances	635,835	260,013
Other Consumer Loans
Ending allowance balance attributable to loans:
Collectively evaluated for impairment	612	78
Total ending allowance	612	78	48	53
Loans:
Collectively evaluated for impairment	39,374	856
Total ending loan balances	$ 39,374	856
Unallocated
Ending allowance balance attributable to loans:
Collectively evaluated for impairment		746
Total ending allowance		$ 746	$ 652	$ 337

LOANS AND ALLOWANCE FOR LOAN 72

LOANS AND ALLOWANCE FOR LOAN LOSSES (Schedule of the risk category of loans by class of loans) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Accounts Notes And Loans Receivable [Line Items]
Total loans	$ 2,062,916	$ 932,304
Commercial Real Estate Owner Occupied
Accounts Notes And Loans Receivable [Line Items]
Total loans	401,847	154,807
Commercial Real Estate Non-owner Occupied
Accounts Notes And Loans Receivable [Line Items]
Total loans	534,630	310,196
Construction and Land Development
Accounts Notes And Loans Receivable [Line Items]
Total loans	197,972	91,067
Commercial Portfolio Segment [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	253,258	115,365
1-4 Family Residential
Accounts Notes And Loans Receivable [Line Items]
Total loans	635,835	260,013
Other Consumer Loans
Accounts Notes And Loans Receivable [Line Items]
Total loans	39,374	856
Special Mention [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	17,432	28
Special Mention [Member] | Commercial Real Estate Owner Occupied
Accounts Notes And Loans Receivable [Line Items]
Total loans	4,178
Special Mention [Member] | Commercial Real Estate Non-owner Occupied
Accounts Notes And Loans Receivable [Line Items]
Total loans	5,705
Special Mention [Member] | Construction and Land Development
Accounts Notes And Loans Receivable [Line Items]
Total loans	128
Special Mention [Member] | Commercial Portfolio Segment [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	5,936	28
Special Mention [Member] | 1-4 Family Residential
Accounts Notes And Loans Receivable [Line Items]
Total loans	1,323
Special Mention [Member] | Other Consumer Loans
Accounts Notes And Loans Receivable [Line Items]
Total loans	162
Substandard [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	22,447	13,614
Substandard [Member] | Commercial Real Estate Owner Occupied
Accounts Notes And Loans Receivable [Line Items]
Total loans	1,678	6,271
Substandard [Member] | Commercial Real Estate Non-owner Occupied
Accounts Notes And Loans Receivable [Line Items]
Total loans	830
Substandard [Member] | Construction and Land Development
Accounts Notes And Loans Receivable [Line Items]
Total loans	9,969
Substandard [Member] | Commercial Portfolio Segment [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	6,035	6,380
Substandard [Member] | 1-4 Family Residential
Accounts Notes And Loans Receivable [Line Items]
Total loans	3,935	963
Pass [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	2,023,037	918,662
Pass [Member] | Commercial Real Estate Owner Occupied
Accounts Notes And Loans Receivable [Line Items]
Total loans	395,991	148,536
Pass [Member] | Commercial Real Estate Non-owner Occupied
Accounts Notes And Loans Receivable [Line Items]
Total loans	528,095	310,196
Pass [Member] | Construction and Land Development
Accounts Notes And Loans Receivable [Line Items]
Total loans	187,875	91,067
Pass [Member] | Commercial Portfolio Segment [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	241,287	108,957
Pass [Member] | 1-4 Family Residential
Accounts Notes And Loans Receivable [Line Items]
Total loans	630,577	259,050
Pass [Member] | Other Consumer Loans
Accounts Notes And Loans Receivable [Line Items]
Total loans	39,212	856
Small Business Administration Loan [Member] | Substandard [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	$ 5,000	$ 2,200

LOANS AND ALLOWANCE FOR LOAN 73

LOANS AND ALLOWANCE FOR LOAN LOSSES (Schedule of carrying amount of covered purchased impaired and non-impaired loans) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accounts Notes And Loans Receivable [Line Items]
Total loans	$ 2,062,916	$ 932,304
Construction and Land Development
Accounts Notes And Loans Receivable [Line Items]
Total loans	197,972	91,067
Commercial Mortgage Loan
Accounts Notes And Loans Receivable [Line Items]
Total loans	253,258	115,365
1-4 Family Residential
Accounts Notes And Loans Receivable [Line Items]
Total loans	635,835	260,013
Other Consumer Loans
Accounts Notes And Loans Receivable [Line Items]
Total loans	39,374	856
GAB acquisition [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	27,182	33,444
GAB acquisition [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	1,239	1,273	$ 1,444
GAB acquisition [Member] | Receivables Acquired Without Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	25,943	32,171	38,758
GAB acquisition [Member] | Commercial Real Estate [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	3,307	4,710
GAB acquisition [Member] | Commercial Real Estate [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	1,050	1,080
GAB acquisition [Member] | Commercial Real Estate [Member] | Receivables Acquired Without Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	2,257	3,630
GAB acquisition [Member] | Commercial Mortgage Loan
Accounts Notes And Loans Receivable [Line Items]
Total loans	469	540
GAB acquisition [Member] | Commercial Mortgage Loan | Receivables Acquired with Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	189	193
GAB acquisition [Member] | Commercial Mortgage Loan | Receivables Acquired Without Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	280	347
GAB acquisition [Member] | 1-4 Family Residential
Accounts Notes And Loans Receivable [Line Items]
Total loans	23,339	28,180
GAB acquisition [Member] | 1-4 Family Residential | Receivables Acquired Without Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	23,339	28,180
GAB acquisition [Member] | Other Consumer Loans
Accounts Notes And Loans Receivable [Line Items]
Total loans	67	14
GAB acquisition [Member] | Other Consumer Loans | Receivables Acquired Without Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	67	14
Eastern Virginia Bankshares Inc [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	942,781
Eastern Virginia Bankshares Inc [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	10,641
Eastern Virginia Bankshares Inc [Member] | Receivables Acquired Without Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	932,140
Eastern Virginia Bankshares Inc [Member] | Commercial Real Estate [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	423,958
Eastern Virginia Bankshares Inc [Member] | Commercial Real Estate [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	5,788
Eastern Virginia Bankshares Inc [Member] | Commercial Real Estate [Member] | Receivables Acquired Without Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	418,170
Eastern Virginia Bankshares Inc [Member] | Construction and Land Development
Accounts Notes And Loans Receivable [Line Items]
Total loans	85,036
Eastern Virginia Bankshares Inc [Member] | Construction and Land Development | Receivables Acquired Without Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	85,036
Eastern Virginia Bankshares Inc [Member] | Commercial Mortgage Loan
Accounts Notes And Loans Receivable [Line Items]
Total loans	116,291
Eastern Virginia Bankshares Inc [Member] | Commercial Mortgage Loan | Receivables Acquired with Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	3,598
Eastern Virginia Bankshares Inc [Member] | Commercial Mortgage Loan | Receivables Acquired Without Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	112,693
Eastern Virginia Bankshares Inc [Member] | 1-4 Family Residential
Accounts Notes And Loans Receivable [Line Items]
Total loans	283,957
Eastern Virginia Bankshares Inc [Member] | 1-4 Family Residential | Receivables Acquired with Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	1,255
Eastern Virginia Bankshares Inc [Member] | 1-4 Family Residential | Receivables Acquired Without Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	282,702
Eastern Virginia Bankshares Inc [Member] | Other Consumer Loans
Accounts Notes And Loans Receivable [Line Items]
Total loans	33,539
Eastern Virginia Bankshares Inc [Member] | Other Consumer Loans | Receivables Acquired Without Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	33,539
HarVest acquisition
Accounts Notes And Loans Receivable [Line Items]
Total loans	19,197	22,995
HarVest acquisition | Receivables Acquired with Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	1,188	1,564	1,688
HarVest acquisition | Receivables Acquired Without Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	18,009	21,431	27,878
HarVest acquisition | Commercial Real Estate [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	9,162	10,408
HarVest acquisition | Commercial Real Estate [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans		258
HarVest acquisition | Commercial Real Estate [Member] | Receivables Acquired Without Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	9,162	10,150
HarVest acquisition | Construction and Land Development
Accounts Notes And Loans Receivable [Line Items]
Total loans	3,265	3,484
HarVest acquisition | Construction and Land Development | Receivables Acquired with Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	396	488
HarVest acquisition | Construction and Land Development | Receivables Acquired Without Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	2,869	2,996
HarVest acquisition | Commercial Mortgage Loan
Accounts Notes And Loans Receivable [Line Items]
Total loans	1,688	2,062
HarVest acquisition | Commercial Mortgage Loan | Receivables Acquired Without Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	1,688	2,062
HarVest acquisition | 1-4 Family Residential
Accounts Notes And Loans Receivable [Line Items]
Total loans	5,082	7,039
HarVest acquisition | 1-4 Family Residential | Receivables Acquired with Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	792	818
HarVest acquisition | 1-4 Family Residential | Receivables Acquired Without Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	4,290	6,221
HarVest acquisition | Other Consumer Loans
Accounts Notes And Loans Receivable [Line Items]
Total loans		2
HarVest acquisition | Other Consumer Loans | Receivables Acquired Without Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans		2
Prince George Federal Savings Bank [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	36,255	42,354
Prince George Federal Savings Bank [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	546	580	703
Prince George Federal Savings Bank [Member] | Receivables Acquired Without Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	35,709	41,774	$ 51,263
Prince George Federal Savings Bank [Member] | Commercial Real Estate [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	2,195	2,863
Prince George Federal Savings Bank [Member] | Commercial Real Estate [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	198	225
Prince George Federal Savings Bank [Member] | Commercial Real Estate [Member] | Receivables Acquired Without Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	1,997	2,638
Prince George Federal Savings Bank [Member] | Construction and Land Development
Accounts Notes And Loans Receivable [Line Items]
Total loans	1,216	1,215
Prince George Federal Savings Bank [Member] | Construction and Land Development | Receivables Acquired with Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans		355
Prince George Federal Savings Bank [Member] | Construction and Land Development | Receivables Acquired Without Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	1,216	860
Prince George Federal Savings Bank [Member] | Commercial Mortgage Loan
Accounts Notes And Loans Receivable [Line Items]
Total loans	39	116
Prince George Federal Savings Bank [Member] | Commercial Mortgage Loan | Receivables Acquired Without Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	39	116
Prince George Federal Savings Bank [Member] | 1-4 Family Residential
Accounts Notes And Loans Receivable [Line Items]
Total loans	32,705	38,018
Prince George Federal Savings Bank [Member] | 1-4 Family Residential | Receivables Acquired with Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	348
Prince George Federal Savings Bank [Member] | 1-4 Family Residential | Receivables Acquired Without Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	32,357	38,018
Prince George Federal Savings Bank [Member] | Other Consumer Loans
Accounts Notes And Loans Receivable [Line Items]
Total loans	100	142
Prince George Federal Savings Bank [Member] | Other Consumer Loans | Receivables Acquired Without Deteriorated Credit Quality [Member]
Accounts Notes And Loans Receivable [Line Items]
Total loans	$ 100	$ 142

LOANS AND ALLOWANCE FOR LOAN 74

LOANS AND ALLOWANCE FOR LOAN LOSSES (Changes in Carrying Amount and Accretable Yield for Purchased Impaired and Nonimpaired Loans) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Loan and Leases Receivable Recorded Investment Schedule [Roll Forward]
Balance at beginning of period	$ 932,304
Balance at end of period	2,062,916	$ 932,304
Eastern Virginia Bankshares Inc [Member]
Loan and Leases Receivable Recorded Investment Schedule [Roll Forward]
Balance at end of period	942,781
GAB acquisition [Member]
Loan and Leases Receivable Recorded Investment Schedule [Roll Forward]
Balance at beginning of period	33,444
Balance at end of period	27,182	33,444
HarVest acquisition
Loan and Leases Receivable Recorded Investment Schedule [Roll Forward]
Balance at beginning of period	22,995
Balance at end of period	19,197	22,995
Prince George Federal Savings Bank [Member]
Loan and Leases Receivable Recorded Investment Schedule [Roll Forward]
Balance at beginning of period	42,354
Balance at end of period	36,255	42,354
Receivables Acquired with Deteriorated Credit Quality [Member] | Eastern Virginia Bankshares Inc [Member]
Loans and Leases Receivable Accretable Yield Movement Schedule [Roll Forward]
Additions	398
Accretion	(83)
Balance at ending of period	315
Loan and Leases Receivable Recorded Investment Schedule [Roll Forward]
Additions	11,329
Accretion	83
Payments received	(771)
Balance at end of period	10,641
Receivables Acquired with Deteriorated Credit Quality [Member] | GAB acquisition [Member]
Loan and Leases Receivable Recorded Investment Schedule [Roll Forward]
Balance at beginning of period	1,273	1,444
Payments received	(34)	(171)
Balance at end of period	1,239	1,273
Receivables Acquired with Deteriorated Credit Quality [Member] | HarVest acquisition
Loan and Leases Receivable Recorded Investment Schedule [Roll Forward]
Balance at beginning of period	1,564	1,688
Payments received	(376)	(124)
Balance at end of period	1,188	1,564
Receivables Acquired with Deteriorated Credit Quality [Member] | Prince George Federal Savings Bank [Member]
Loan and Leases Receivable Recorded Investment Schedule [Roll Forward]
Balance at beginning of period	580	703
Payments received	(34)	(123)
Balance at end of period	546	580
Receivables Acquired Without Deteriorated Credit Quality [Member] | Eastern Virginia Bankshares Inc [Member]
Loans and Leases Receivable Accretable Yield Movement Schedule [Roll Forward]
Additions	14,783
Accretion	(2,669)
Balance at ending of period	12,114
Loan and Leases Receivable Recorded Investment Schedule [Roll Forward]
Additions	1,020,653
Accretion	2,669
Reclassifications from nonaccretable balance	(43)
Payments received	(91,139)
Balance at end of period	932,140
Receivables Acquired Without Deteriorated Credit Quality [Member] | GAB acquisition [Member]
Loans and Leases Receivable Accretable Yield Movement Schedule [Roll Forward]
Balance at beginning of period	3,761	4,597
Accretion	(886)	(1,085)
Reclassifications from nonaccretable balance	230	269
Adjustment - transfer to OREO		(20)
Balance at ending of period	3,105	3,761
Loan and Leases Receivable Recorded Investment Schedule [Roll Forward]
Balance at beginning of period	32,171	38,758
Accretion	892	1,085
Adjustment - transfer to OREO		(169)
Payments received	(7,120)	(7,503)
Balance at end of period	25,943	32,171
Receivables Acquired Without Deteriorated Credit Quality [Member] | HarVest acquisition
Loans and Leases Receivable Accretable Yield Movement Schedule [Roll Forward]
Balance at beginning of period	662	858
Accretion	(184)	(196)
Balance at ending of period	478	662
Loan and Leases Receivable Recorded Investment Schedule [Roll Forward]
Balance at beginning of period	21,431	27,878
Accretion	184	139
Payments received	(3,606)	(6,586)
Balance at end of period	18,009	21,431
Receivables Acquired Without Deteriorated Credit Quality [Member] | Prince George Federal Savings Bank [Member]
Loans and Leases Receivable Accretable Yield Movement Schedule [Roll Forward]
Balance at beginning of period	2,096	2,462
Accretion	(333)	(366)
Balance at ending of period	1,763	2,096
Loan and Leases Receivable Recorded Investment Schedule [Roll Forward]
Balance at beginning of period	41,774	51,263
Accretion	333	365
Payments received	(6,398)	(9,854)
Balance at end of period	$ 35,709	$ 41,774

FAIR VALUE (Narrative) (Details

FAIR VALUE (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounts Notes And Loans Receivable [Line Items]
Allowances for loan losses	$ 9,397,000	$ 8,610,000	$ 8,421,000	$ 7,414,000
Other real estate owned	$ 7,577,000	$ 8,617,000
Minimum [Member]
Accounts Notes And Loans Receivable [Line Items]
Fair value of estimated costs related to selling the collateral	6.00%	6.00%
Percentage of discount rate on other real estate owned	5.00%	5.00%
Maximum [Member]
Accounts Notes And Loans Receivable [Line Items]
Fair value of estimated costs related to selling the collateral	10.00%	10.00%
Percentage of discount rate on other real estate owned	7.60%	7.60%
Fair Value, Inputs, Level 3 [Member] | Non-covered Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Non covered Impaired loans	$ 20,700,000	$ 13,600,000
Allowances for loan losses	0	900,000
Non covered other real estate owned	7,600,000
Fair Value, Inputs, Level 3 [Member] | Covered Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Covered other real estate owned	8,600,000
Small Business Administration Loan [Member] | Fair Value, Inputs, Level 3 [Member]
Accounts Notes And Loans Receivable [Line Items]
Non covered Impaired loans	$ 5,000,000
Small Business Administration Loan [Member] | Fair Value, Inputs, Level 3 [Member] | Non-covered Loans [Member]
Accounts Notes And Loans Receivable [Line Items]
Non covered Impaired loans		$ 2,200,000

FAIR VALUE (Schedule of assets

FAIR VALUE (Schedule of assets measured at fair value on a recurring basis) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Available for sale securities
Fair value	$ 160,673	$ 3,918
Fair Value | Fair Value, Inputs, Level 2 [Member]
Available for sale securities
Fair value	160,673	3,918
Fair Value, Measurements, Recurring [Member]
Available for sale securities
Fair value	160,673	3,918
Fair Value, Measurements, Recurring [Member] | US Government Agencies Debt Securities [Member]
Available for sale securities
Fair value	30,864
Fair Value, Measurements, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member]
Available for sale securities
Fair value	18,727	2,259
Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member]
Available for sale securities
Fair value	2,015
Fair Value, Measurements, Recurring [Member] | Residential Mortgage Backed Securities [Member]
Available for sale securities
Fair value	50,766
Fair Value, Measurements, Recurring [Member] | Government-Sponsored Agency Securities
Available for sale securities
Fair value	3,226
Fair Value, Measurements, Recurring [Member] | Commercial Mortgage Backed Securities [Member]
Available for sale securities
Fair value	27,898
Fair Value, Measurements, Recurring [Member] | SBA Pool Securities [Member]
Available for sale securities
Fair value	24,789
Fair Value, Measurements, Recurring [Member] | Trust preferred securities
Available for sale securities
Fair value	2,388	1,659
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Available for sale securities
Fair value	160,673	3,918
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | US Government Agencies Debt Securities [Member]
Available for sale securities
Fair value	30,864
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | US States and Political Subdivisions Debt Securities [Member]
Available for sale securities
Fair value	18,727	2,259
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member]
Available for sale securities
Fair value	2,015
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Residential Mortgage Backed Securities [Member]
Available for sale securities
Fair value	50,766
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Government-Sponsored Agency Securities
Available for sale securities
Fair value	3,226
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Commercial Mortgage Backed Securities [Member]
Available for sale securities
Fair value	27,898
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | SBA Pool Securities [Member]
Available for sale securities
Fair value	24,789
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Trust preferred securities
Available for sale securities
Fair value	$ 2,388	$ 1,659

FAIR VALUE (Schedule of asset77

FAIR VALUE (Schedule of assets measured at fair value on non recurring basis) (Details) - Fair Value, Measurements, Nonrecurring [Member] - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets held for sale	$ 1,927
Commercial Real Estate Owner Occupied
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	767	$ 6,121
Other real estate owned	1,060	1,110
Commercial Real Estate Non-owner Occupied
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	766
Other real estate owned		237
Construction and Land Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	9,969
Other real estate owned	3,229	3,863
Commercial Mortgage Loan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	6,035	5,630
One To Four Family Residential Real Estate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	3,160	963
Other real estate owned	3,288	3,407
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets held for sale	1,927
Fair Value, Inputs, Level 3 [Member] | Commercial Real Estate Owner Occupied
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	767	6,121
Other real estate owned	1,060	1,110
Fair Value, Inputs, Level 3 [Member] | Commercial Real Estate Non-owner Occupied
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	766
Other real estate owned		237
Fair Value, Inputs, Level 3 [Member] | Construction and Land Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	9,969
Other real estate owned	3,229	3,863
Fair Value, Inputs, Level 3 [Member] | Commercial Mortgage Loan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	6,035	5,630
Fair Value, Inputs, Level 3 [Member] | One To Four Family Residential Real Estate [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	3,160	963
Other real estate owned	$ 3,288	$ 3,407

FAIR VALUE (Schedule of estimat

FAIR VALUE (Schedule of estimated fair values and fair value hierarchy levels of financial instruments) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Financial assets:
Cash and cash equivalents	$ 25,463	$ 47,392	$ 30,336	$ 38,320
Securities available for sale	160,673	3,918
Securities held to maturity, at amortized cost (fair value of $97,597 and $83,344, respectively)	98,912	85,300
Stock in Federal Reserve Bank and Federal Home Loan Bank	26,775	7,929
Equity investment in mortgage affiliate	4,723	4,629
Preferred investment in mortgage affiliate	3,305	2,555
FDIC indemnification asset	1,353	2,111	2,922
Financial liabilities:
Certificates of deposit	699,058	605,613
Securities sold under agreements to repurchase	15,468		$ 10,381
Junior subordinated debt	9,534
Senior subordinated notes-long term	47,128
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Financial assets:
Stock in Federal Reserve Bank and Federal Home Loan Bank	26,775	7,929
Fair Value, Inputs, Level 1 [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
Financial assets:
Cash and cash equivalents	25,463	47,392
Financial liabilities:
Demand deposits	649,067	124,779
Money market and savings accounts	517,031	182,590
Securities sold under agreements to repurchase	15,468
FHLB advances	335,615	95,000
Fair Value, Inputs, Level 1 [Member] | Fair Value
Financial assets:
Cash and cash equivalents	25,463	47,392
Financial liabilities:
Demand deposits	649,067	124,779
Money market and savings accounts	517,031	182,590
Securities sold under agreements to repurchase	15,468
FHLB advances	335,615	95,000
Fair Value, Inputs, Level 2 [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
Financial assets:
Securities available for sale	160,673	3,918
Securities held to maturity, at amortized cost (fair value of $97,597 and $83,344, respectively)	98,912	85,300
Financial liabilities:
Junior subordinated debt	9,534
Senior subordinated notes-long term	47,128
Fair Value, Inputs, Level 2 [Member] | Fair Value
Financial assets:
Securities available for sale	160,673	3,918
Securities held to maturity, at amortized cost (fair value of $97,597 and $83,344, respectively)	97,597	83,344
Financial liabilities:
Junior subordinated debt	12,043
Senior subordinated notes-long term	58,163
Fair Value, Inputs, Level 3 [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
Financial assets:
Equity investment in mortgage affiliate	4,723	4,629
Preferred investment in mortgage affiliate	3,305	2,555
Net loans	2,052,931	921,805
FDIC indemnification asset	1,353	2,111
Financial liabilities:
Certificates of deposit	699,058	605,613
Fair Value, Inputs, Level 3 [Member] | Fair Value
Financial assets:
Equity investment in mortgage affiliate	4,723	4,629
Preferred investment in mortgage affiliate	3,305	2,555
Net loans	2,058,779	935,258
FDIC indemnification asset	309	528
Financial liabilities:
Certificates of deposit	694,368	605,394
Fair Value Inputs Level 1 and Level 3 [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
Financial liabilities:
Accrued interest payable	2,273	1,190
Fair Value Inputs Level 1 and Level 3 [Member] | Fair Value
Financial liabilities:
Accrued interest payable	2,273	1,190
Fair Value Inputs Level 2 and Level 3 [Member] | Carrying (Reported) Amount, Fair Value Disclosure [Member]
Financial assets:
Accrued interest receivable	8,073	3,202
Fair Value Inputs Level 2 and Level 3 [Member] | Fair Value
Financial assets:
Accrued interest receivable	$ 8,073	$ 3,202

BANK PREMISES AND EQUIPMENT (Na

BANK PREMISES AND EQUIPMENT (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Rental expense	$ 2.2	$ 2	$ 2
Maximum [Member]
Property, Plant and Equipment [Line Items]
Lease term	6 years

BANK PREMISES AND EQUIPMENT (Sc

BANK PREMISES AND EQUIPMENT (Schedule of bank premises and equipment) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Bank premises and equipment, gross	$ 67,368	$ 14,863
Less accumulated depreciation and amortization	31,580	6,636
Bank premises and equipment, net	35,788	8,227
Land [Member]
Property, Plant and Equipment [Line Items]
Bank premises and equipment, gross	8,133	2,261
Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Bank premises and equipment, gross	2,027
Building and Improvements [Member]
Property, Plant and Equipment [Line Items]
Bank premises and equipment, gross	33,928	5,842
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Bank premises and equipment, gross	3,217	2,428
Furniture, Fixtures and Equipment [Member]
Property, Plant and Equipment [Line Items]
Bank premises and equipment, gross	20,022	$ 4,332
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Bank premises and equipment, gross	$ 41

BANK PREMISES AND EQUIPMENT (81

BANK PREMISES AND EQUIPMENT (Schedule of future minimum rental payments required under non-cancelable operating leases for bank premises) (Details) $ in Thousands	Dec. 31, 2017USD ($)
Property, Plant and Equipment [Abstract]
2,018	$ 2,554
2,019	2,208
2,020	1,767
2,021	1,102
2,022	1,074
Thereafter	3,141
Future minimum rental payments, total	$ 11,846

GOODWILL AND INTANGIBLE ASSET82

GOODWILL AND INTANGIBLE ASSETS (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 100,606	$ 10,514
Increase in goodwill	$ 90,100

GOODWILL AND INTANGIBLE ASSET83

GOODWILL AND INTANGIBLE ASSETS (Schedule of acquired intangible assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Amortizable intangibles, net carrying value	$ 10,054	$ 874
Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Amortizable intangibles, gross carrying value	17,503	7,477
Accumulated Amortization	(7,449)	(6,603)
Amortizable intangibles, net carrying value	$ 10,054	$ 874

GOODWILL AND INTANGIBLE ASSET84

GOODWILL AND INTANGIBLE ASSETS (Schedule of estimated amortization expense of intangibles) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Intangibles, net	$ 10,054	$ 874
Core Deposits and Servicing Rights [Member]
Finite-Lived Intangible Assets [Line Items]
2,018	1,471
2,019	1,438
2,020	1,377
2,021	1,377
2,022	1,337
Thereafter	3,203
Intangibles, net	$ 10,203

FDIC INDEMNIFICATION ASSET (Nar

FDIC INDEMNIFICATION ASSET (Narrative) (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)agreement	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 04, 2009USD ($)
Indemnity [Line Items]
Estimated fair value of the indemnification asset | $				$ 8,800
Amount to be recover from FDIC under indemnification agreement | $	$ 309	$ 309
FDIC indemnification asset carrying amount | $	$ 1,353	$ 2,111	$ 2,922
Number of agreement with FDIC | agreement	2
Single Family Assets [Member]
Indemnity [Line Items]
Number of agreement with FDIC | agreement	1
Term of FDIC agreement	10 years
Non Single Family Commercial Assets [Member]
Indemnity [Line Items]
Number of agreement with FDIC | agreement	1
Term of FDIC agreement	5 years

FDIC INDEMNIFICATION ASSET (Cha

FDIC INDEMNIFICATION ASSET (Changes in the indemnification asset for the periods) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
FDIC Indemnification Asset [Roll Forward]
Balance as of January 1	$ 2,111	$ 2,922
Payments from FDIC	(46)	(18)
Amortization	(712)	(793)
Balance as of December 31	$ 1,353	$ 2,111

DEPOSITS (Narrative) (Details)

DEPOSITS (Narrative) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deposits [Abstract]
Aggregate amount of time deposits in denominations of $100,000 or more	$ 171,013	$ 147,600
Brokered certificate of deposits	109,800	66,500
Money market deposits	$ 17,000	$ 14,200

DEPOSITS (Scheduled maturities

DEPOSITS (Scheduled maturities of time deposits) (Details) $ in Thousands	Dec. 31, 2017USD ($)
Deposits [Abstract]
2,018	$ 402,078
2,019	190,455
2,020	49,378
2,021	34,325
2,022	22,822
Time deposits, total	$ 699,058

DEPOSITS (Scheduled maturitie89

DEPOSITS (Scheduled maturities of certificates of deposits) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deposits [Abstract]
Within 3 Months	$ 26,041
3 to 6 Months	23,576
6 to 12 Months	28,589
Over 12 Months	92,807
Total	$ 171,013	$ 147,600

SECURITIES SOLD UNDER AGREEME90

SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE AND OTHER SHORT-TERM BORROWINGS (Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Jun. 23, 2017	Dec. 31, 2016
Federal Home Loan Bank, Advances, Branch Of Fhlb Bank [Line Items]
Federal Funds Purchased and Securities Sold under Agreements to Repurchase	$ 15.5
Securities sold under agreements to repurchase, fair value of collateral	24.2		$ 13.6
Potential amount that could be collateralized	314.2
Eastern Virginia Bankshares Inc [Member]
Federal Home Loan Bank, Advances, Branch Of Fhlb Bank [Line Items]
Federal Funds Purchased and Securities Sold under Agreements to Repurchase		$ 7.6
Federal Home Loan Bank of Atlanta [Member]
Federal Home Loan Bank, Advances, Branch Of Fhlb Bank [Line Items]
FHLB advances, pledged as collateral	323.3		128.9
Commercial Mortgage Loan | Federal Home Loan Bank Advances [Member]
Federal Home Loan Bank, Advances, Branch Of Fhlb Bank [Line Items]
FHLB advances, pledged as collateral	124.4		172.6
Home Equity Loan [Member] | Federal Home Loan Bank Advances [Member]
Federal Home Loan Bank, Advances, Branch Of Fhlb Bank [Line Items]
FHLB advances, pledged as collateral	82		17.5
Securities Investment [Member] | Federal Home Loan Bank Advances [Member]
Federal Home Loan Bank, Advances, Branch Of Fhlb Bank [Line Items]
FHLB advances, pledged as collateral	$ 26		$ 46.7

SECURITIES SOLD UNDER AGREEME91

SECURITIES SOLD UNDER AGREEMENTS TO REPURCHASE AND OTHER SHORT-TERM BORROWINGS (Summary of Other short-term borrowings) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Short-term Debt [Line Items]
Securities sold under agreements to repurchase	$ 15,468		$ 10,381
Total	$ 351,083	$ 95,000	$ 69,381
Federal Home Loan Bank Advances [Member]
Short-term Debt [Line Items]
Weighted average interest rate at year end	1.50%	0.86%	0.51%
Average outstanding balance	$ 177,983	$ 66,864	$ 34,673
Average interest rate during the year	1.24%	0.74%	0.76%
Maximum month-end outstanding balance	$ 351,083	$ 95,000	$ 69,381
Other short-term FHLB advances maturing 6/27/2018 [Member] | Federal Home Loan Bank Advances [Member]
Short-term Debt [Line Items]
Amount of advances, FHLB	$ 10,000
Due date, FHLB	Jun. 27, 2018
Other short-term FHLB advances maturing 6/20/2018 [Member] | Federal Home Loan Bank Advances [Member]
Short-term Debt [Line Items]
Amount of advances, FHLB	$ 27,200
Due date, FHLB	Jun. 20, 2018
Other short-term FHLB advances maturing 6/14/2018 [Member] | Federal Home Loan Bank Advances [Member]
Short-term Debt [Line Items]
Amount of advances, FHLB	$ 10,000
Due date, FHLB	Jun. 14, 2018
Other short-term FHLB advances maturing 6/13/2018 [Member] | Federal Home Loan Bank Advances [Member]
Short-term Debt [Line Items]
Amount of advances, FHLB	$ 80,640
Due date, FHLB	Jun. 13, 2018
Other short-term FHLB advances maturing 6/12/2018 [Member] | Federal Home Loan Bank Advances [Member]
Short-term Debt [Line Items]
Amount of advances, FHLB	$ 10,000
Due date, FHLB	Jun. 12, 2018
Other short-term FHLB advances maturing 3/28/2018 [Member] | Federal Home Loan Bank Advances [Member]
Short-term Debt [Line Items]
Amount of advances, FHLB	$ 30,000
Due date, FHLB	Mar. 28, 2018
Other short-term FHLB advances maturing 3/14/2018 [Member] | Federal Home Loan Bank Advances [Member]
Short-term Debt [Line Items]
Amount of advances, FHLB	$ 80,640
Due date, FHLB	Mar. 14, 2018
Other short-term FHLB advances maturing 3/13/2018 [Member] | Federal Home Loan Bank Advances [Member]
Short-term Debt [Line Items]
Amount of advances, FHLB	$ 30,275
Due date, FHLB	Mar. 13, 2018
Other short-term FHLB advances maturing 3/27/2017 [Member] | Federal Home Loan Bank Advances [Member]
Short-term Debt [Line Items]
Amount of advances, FHLB		10,000
Due date, FHLB	Mar. 27, 2017
Other short-term FHLB advances maturing 5/4/2017 [Member] | Federal Home Loan Bank Advances [Member]
Short-term Debt [Line Items]
Amount of advances, FHLB		10,000
Due date, FHLB	May 4, 2017
Other short-term FHLB advances maturing 6/5/2017 [Member] | Federal Home Loan Bank Advances [Member]
Short-term Debt [Line Items]
Amount of advances, FHLB		10,000
Due date, FHLB	Jun. 5, 2017
Other short-term FHLB advances maturing 6/19/2017 [Member] | Federal Home Loan Bank Advances [Member]
Short-term Debt [Line Items]
Amount of advances, FHLB		5,000
Due date, FHLB	Jun. 19, 2017
Other short-term FHLB advances maturing 12/15/2017 [Member] | Federal Home Loan Bank Advances [Member]
Short-term Debt [Line Items]
Amount of advances, FHLB		10,000
Due date, FHLB	Dec. 15, 2017
Other short-term FHLB advances maturing 11/4/2016 [Member] | Federal Home Loan Bank Advances [Member]
Short-term Debt [Line Items]
Amount of advances, FHLB			10,000
Due date, FHLB	Nov. 4, 2016
Overnight [member] | Federal Home Loan Bank Advances [Member]
Short-term Debt [Line Items]
Amount of advances, FHLB	$ 56,860	$ 50,000	$ 49,000

JUNIOR SUBORDINATED DEBT AND 92

JUNIOR SUBORDINATED DEBT AND SENIOR SUBORDINATED NOTES (Narrative) (Details) $ in Thousands	Jan. 20, 2017USD ($)	Apr. 22, 2015USD ($)	Sep. 17, 2003USD ($)	Dec. 31, 2017USD ($)	Jun. 23, 2017USD ($)	Dec. 31, 2016
Senior Subordinated Notes [Member]
Debt Instrument [Line Items]
Proceeds from subordinated notes	$ 27,000
Interest rate percentage	5.875%
Description of variable rate basis				three-month LIBOR
Basis spread on LIBOR	3.95%
Unamortized debt issuance costs				$ 854
Eastern Virginia Bankshares Inc [Member]
Debt Instrument [Line Items]
Notes assumed in merger			$ 10,300
Junior subordinated debt					$ 9,509
Senior subordinated notes					21,051
Pooled underwriting amount			$ 650,000
Eastern Virginia Bankshares Inc [Member] | Junior Subordinated Debt [Member]
Debt Instrument [Line Items]
Interest rate percentage				4.55%		3.94%
Description of variable rate basis				3-month LIBOR
Basis spread on LIBOR			2.95%
Percentage of tier one capital for regulatory capital adequacy				25.00%
Eastern Virginia Bankshares Inc [Member] | Senior Subordinated Notes [Member]
Debt Instrument [Line Items]
Proceeds from subordinated notes		$ 20,000
Interest rate percentage		6.50%
Percentage of aggregate principle amount		100.00%
Debt instrument basis points spread		502
Scenario, Adjustment [Member] | Eastern Virginia Bankshares Inc [Member]
Debt Instrument [Line Items]
Junior subordinated debt					(801)
Senior subordinated notes					$ 1,876

INCOME TAXES (Narrative) (Detai

INCOME TAXES (Narrative) (Details) - USD ($)	Dec. 22, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Line Items]
Deferred tax assets, valuation allowance		$ 0	$ 0
Unrecognized tax benefits		0
Unrecognized tax benefits, income tax penalties and interest expense		$ 0	$ 0	$ 0
U.S. Federal income tax rate		34.00%	34.00%	34.00%
Income Tax Examination, Description		Southern National and its subsidiaries file a consolidated U.S. federal income tax return, and Southern National files a Virginia state income tax return. Sonabank files a Maryland state income tax return. These returns are subject to examination by taxing authorities for all years after 2013.
Provisional tax adjustment related to reduction in U.S. federal statutory income tax rate		$ 7,211,000
Scenario, Plan [Member]
Income Tax Disclosure [Line Items]
U.S. Federal income tax rate	21.00%	21.00%

INCOME TAXES (Schedule of net d

INCOME TAXES (Schedule of net deferred tax assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred tax assets:
Allowance for loan losses	$ 2,100	$ 2,997
Organization costs	78	72
Unearned loan fees and other	987	656
Other real estate owned write-downs	794	945
Other than temporary impairment charge	235	369
Net unrealized loss on investment securities available for sale	367	406
Purchase accounting	3,411	934
Federal net operating loss carryforward	4,845
Federal AMT credit carryforward	1,137
Federal low income housing credit carryforward	2,386
Deferred compensation	1,114	878
Other	712	871
Total deferred tax assets	18,166	8,128
Deferred tax liabilities:
FDIC indemnification asset	300	735
Depreciation	963	613
Total deferred tax liabilities	1,263	1,348
Net deferred tax assets	$ 16,903	$ 6,780

INCOME TAXES (Schedule of provi

INCOME TAXES (Schedule of provision for income taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current tax expense
Federal	$ 3,145	$ 4,781	$ 2,367
State	316	285	168
Total current tax expense	3,461	5,066	2,535
Deferred tax benefit
Federal	10,234	28	2,123
State	(548)	1	9
Total deferred tax expense	9,686	29	2,132
Total income tax expense	$ 13,147	$ 5,095	$ 4,667

INCOME TAXES (Schedule of incom

INCOME TAXES (Schedule of income tax expense determined by applying the U.S. Federal income tax rate) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Computed expected tax expense at statutory rate	$ 5,294	$ 5,238	$ 4,745
Reduction in tax expense resulting from:
Income from bank-owned life insurance	(316)	(238)	(216)
Other, net	234	95	138
Transaction costs	724
Provisional tax adjustment related to reduction in U.S. federal statutory income tax rate	7,211
Total income tax expense	$ 13,147	$ 5,095	$ 4,667

EMPLOYEE BENEFITS (Narrative) (

EMPLOYEE BENEFITS (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)agreement	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Employer discretionary matching contributions in 401(k) plan	$ 433	$ 132	$ 108
Executive Officer [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Number of officers | agreement	2
Term of deferred compensation arrangement	10 years
Deferred compensation expense	$ 415	495	$ 403
Deferred compensation liability	$ 5,000	$ 2,500

STOCK- BASED COMPENSATION (Narr

STOCK- BASED COMPENSATION (Narrative) (Details) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017$ / sharesshares	Dec. 31, 2017USD ($)shares	Dec. 31, 2016USD ($)shares	Dec. 31, 2015USD ($)
Stock Option Plan 2004 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for reservation (in shares)		302,500
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options issued in connection with EVBS merger		22,559
Stock-based compensation expense | $		$ 237	$ 260	$ 331
Unrecognized compensation expense associated with the stock options | $		$ 214
Unrecognized compensation cost weighted average recognition period		2 years
Employee Stock Option [Member] | Stock Awards and Incentive Plan 2010 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for reservation (in shares)		700,000
Granted			136,000
Method used for fair value of each option granted		Black-Scholes options-pricing model
Employee Stock Option [Member] | Stock Option Plan 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for reservation (in shares)		750,000
Restricted Stock [Member] | Stock Option Plan 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense | $		$ 14
Unrecognized compensation expense associated with the other than options | $		$ 30
Granted, other than options	2,800
Granted, exercise price, other than options | $ / shares	$ 15.78
Equity instrument, vesting period		2 years
Eastern Virginia Bankshares Inc [Member] | Employee Stock Option [Member] | Stock Option Plan 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options issued in connection with EVBS merger		22,559
Exchange ratio		0.6313

STOCK- BASED COMPENSATION (Sche

STOCK- BASED COMPENSATION (Schedule of weighted-average assumptions used to value options) (Details) - Employee Stock Option [Member] - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life	10 years	10 years
Expected volatility	14.16%	14.71%
Risk-free interest rate	1.62%	2.26%
Weighted average fair value per option granted	$ 0.63	$ 0.51
Dividend yield	4.44%	5.51%

STOCK- BASED COMPENSATION (S100

STOCK- BASED COMPENSATION (Schedule of activity in the stock option plan) (Details) - Employee Stock Option [Member] $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)$ / sharesshares
Shares
Options outstanding, beginning of period | shares	782,200
Options issued in connection with EVBS merger | shares	22,559
Forfeited | shares	(27,042)
Exercised | shares	(62,750)
Options outstanding, end of period | shares	714,967
Exercisable at end of period | shares	379,557
Weighted Average Exercise Price
Options outstanding, beginning of period | $ / shares	$ 9.56
Options issued in connection with EVBS merger | $ / shares	24.54
Forfeited | $ / shares	21.44
Exercised | $ / shares	8.84
Options outstanding, end of period | $ / shares	9.83
Exercisable at end of period | $ / shares	$ 8.74
Weighted Average Remaining Contractual Term
Options outstanding, end of period	5 years 7 months 6 days
Exercisable at end of period	4 years 1 month 6 days
Options outstanding, end of period - Aggregate Intrinsic Value | $	$ 4,553
Exercisable at end of period - Aggregate Intrinsic Value | $	$ 3,099

FINANCIAL INSTRUMENTS WITH O101

FINANCIAL INSTRUMENTS WITH OFF-BALANCE SHEET RISK (Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Financial Instruments With Off Balance Sheet Risk [Abstract]
Letters of credit outstanding	$ 15.2	$ 6.4
Unfunded lines of credit and undisbursed construction loan funds	$ 361.7	$ 135.8

EARNINGS PER SHARE (Narrative)

EARNINGS PER SHARE (Narrative) (Details) - shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Stock Options and Warrants [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive options and warrants (in shares)	434,385	678,721	643,164

EARNINGS PER SHARE (Schedule of

EARNINGS PER SHARE (Schedule of reconciliation of the denominators of the basic and diluted earnings per share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Earnings Per Share [Abstract]
Basic EPS - Income (Numerator) (in dollars)									$ 2,425	$ 10,312	$ 9,289
Diluted EPS - Income (Numerator)	$ (1,161)	$ 4,374	$ (2,842)	$ 2,054	$ 2,192	$ 2,765	$ 2,789	$ 2,566	$ 2,425	$ 10,312	$ 9,289
Basic EPS- Weighted Average Shares (Denominator) (in shares)									18,391	12,252	12,224
Effect of dilutive stock options and warrants- Weighted Average Shares (Denominator) (in shares)									281	175	106
Diluted EPS- Weighted Average Shares (Denominator) (in shares)									18,672	12,427	12,330
Basic EPS - Per Share Amount (in dollars per share)	$ (0.05)	$ 0.18	$ (0.21)	$ 0.17	$ 0.18	$ 0.23	$ 0.23	$ 0.21	$ 0.13	$ 0.84	$ 0.76
Diluted EPS- Per Share Amount (in dollars per share)	$ (0.05)	$ 0.18	$ (0.21)	$ 0.16	$ 0.18	$ 0.22	$ 0.23	$ 0.21	$ 0.13	$ 0.83	$ 0.75

REGULATORY MATTERS (Schedule of

REGULATORY MATTERS (Schedule of capital amounts and ratios for southern national and sonabank) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Southern National
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity tier 1 capital ratio, Actual Amount	$ 211,399	$ 116,076
Common equity tier 1 capital ratio, Actual Ratio	10.53%	12.69%
Common equity tier 1 capital ratio, Required For Capital Adequacy Purposes Amount	$ 90,300	$ 41,171
Common equity tier 1 capital ratio, Required For Capital Adequacy Purposes Ratio	4.50%	4.50%
Tier 1 risk-based capital ratio, Actual Amount	$ 220,430	$ 116,076
Tier 1 risk-based capital ratio, Actual Ratio	10.98%	12.69%
Tier 1 risk-based capital ratio, Actual Ratio Required For Capital Adequacy Purposes, Amount	$ 120,399	$ 54,894
Tier 1 risk-based capital ratio, Actual Ratio Required For Capital Adequacy Purposes, Ratio	6.00%	6.00%
Total risk-based capital ratio, Actual Amount	$ 276,827	$ 124,686
Total risk-based capital ratio, Actual Ratio	13.80%	13.63%
Total risk-based capital ratio, Actual Ratio Required For Capital Adequacy Purposes, Amount	$ 160,533	$ 73,193
Total risk-based capital ratio, Actual Ratio Required For Capital Adequacy Purposes, Ratio	8.00%	8.00%
Leverage ratio, Actual Amount	$ 220,430	$ 116,076
Leverage ratio, Actual Ratio	8.82%	10.56%
Leverage ratio, Actual Ratio Required For Capital Adequacy Purposes, Amount	$ 100,022	$ 43,965
Leverage ratio, Actual Ratio Required For Capital Adequacy Purposes, Ratio	4.00%	4.00%
Sonabank [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity tier 1 capital ratio, Actual Amount	$ 256,615	$ 114,779
Common equity tier 1 capital ratio, Actual Ratio	12.79%	12.55%
Common equity tier 1 capital ratio, Required For Capital Adequacy Purposes Amount	$ 90,282	$ 41,151
Common equity tier 1 capital ratio, Required For Capital Adequacy Purposes Ratio	4.50%	4.50%
Common equity tier 1 capital ratio, To Be Categorized as Well Capitalized Amount	$ 130,407	$ 59,440
Common equity tier 1 capital ratio, To Be Categorized as Well Capitalized Ratio	6.50%	6.50%
Tier 1 risk-based capital ratio, Actual Amount	$ 256,615	$ 114,779
Tier 1 risk-based capital ratio, Actual Ratio	12.79%	12.55%
Tier 1 risk-based capital ratio, Actual Ratio Required For Capital Adequacy Purposes, Amount	$ 120,375	$ 54,868
Tier 1 risk-based capital ratio, Actual Ratio Required For Capital Adequacy Purposes, Ratio	6.00%	6.00%
Tier 1 risk-based capital ratio, To Be Categorized as Well Capitalized, Amount	$ 160,500	$ 73,157
Tier 1 risk-based capital ratio, To Be Categorized as Well Capitalized, Ratio	8.00%	8.00%
Total risk-based capital ratio, Actual Amount	$ 266,012	$ 123,389
Total risk-based capital ratio, Actual Ratio	13.26%	13.49%
Total risk-based capital ratio, Actual Ratio Required For Capital Adequacy Purposes, Amount	$ 160,500	$ 73,157
Total risk-based capital ratio, Actual Ratio Required For Capital Adequacy Purposes, Ratio	8.00%	8.00%
Total risk-based capital ratio, To Be Categorized as Well Capitalized, Amount	$ 200,626	$ 91,447
Total risk-based capital ratio, To Be Categorized as Well Capitalized, Ratio	10.00%	10.00%
Leverage ratio, Actual Amount	$ 256,615	$ 114,779
Leverage ratio, Actual Ratio	10.26%	10.45%
Leverage ratio, Actual Ratio Required For Capital Adequacy Purposes, Amount	$ 100,040	$ 43,947
Leverage ratio, Actual Ratio Required For Capital Adequacy Purposes, Ratio	4.00%	4.00%
Leverage ratio, To Be Categorized as Well Capitalized, Amount	$ 125,051	$ 54,934
Leverage ratio, To Be Categorized as Well Capitalized, Ratio	5.00%	5.00%

PARENT COMPANY FINANCIAL INF105

PARENT COMPANY FINANCIAL INFORMATION (Schedule of condensed balance sheet of Southern National Bancorp of Virginia, Inc.) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
ASSETS
Cash	$ 25,463	$ 47,392	$ 30,336	$ 38,320
Other assets	18,399	7,966
Total assets	2,614,252	1,142,443
Liabilities [Abstract]
Junior subordinated debt	9,534
Senior subordinated notes-long term	47,128
Other liabilities	18,579	8,117
Total liabilities	2,291,480	1,016,099
Stockholders' equity:
Retained earnings	18,753	22,126
Accumulated other comprehensive loss	(1,152)	(789)	(610)	(3,020)
Total stockholders' equity	322,772	126,344	119,636	113,979
Total liabilities and stockholders' equity	2,614,252	1,142,443
Southern National
ASSETS
Cash	4,535	856	$ 823	$ 769
Investment in subsidiary	369,266	125,047
Other assets	6,405	441
Total assets	380,206	126,344
Liabilities [Abstract]
Junior subordinated debt	9,534
Senior subordinated notes-long term	47,128
Other liabilities	772
Total liabilities	57,434
Stockholders' equity:
Common stock	239	123
Additional paid in capital	304,932	104,884
Retained earnings	18,753	22,126
Accumulated other comprehensive loss	(1,152)	(789)
Total stockholders' equity	322,772	126,344
Total liabilities and stockholders' equity	$ 380,206	$ 126,344

PARENT COMPANY FINANCIAL INF106

PARENT COMPANY FINANCIAL INFORMATION (Schedule of condensed statements of income of Southern National Bancorp of Virginia, Inc.) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Condensed Financial Statements, Captions [Line Items]
Total interest and dividend income	$ 27,965	$ 28,811	$ 14,249	$ 12,545	$ 12,364	$ 12,619	$ 12,291	$ 11,673	$ 83,570	$ 48,947	$ 43,701
Interest on junior subordinated debt									253
Interest on senior subordinated notes									2,194
Merger expenses									9,426	429
Other operating expenses									5,991	2,976	3,682
Income before income taxes	9,692	6,463	(3,804)	3,221	3,530	4,140	4,182	3,555	15,572	15,407	13,956
Income tax benefit									(13,147)	(5,095)	(4,667)
Net income	$ (1,161)	$ 4,374	$ (2,842)	$ 2,054	$ 2,192	$ 2,765	$ 2,789	$ 2,566	2,425	10,312	9,289
Southern National
Condensed Financial Statements, Captions [Line Items]
Cash dividends received from Sonabank									4,900	3,600	6,300
Interest on deposits with subsidiary									3
Total interest and dividend income									4,903	3,600	6,300
Interest on junior subordinated debt									253
Interest on senior subordinated notes									2,194
Merger expenses									2,812
Other operating expenses									478	153	204
Total expense									5,737	153	204
Income before income taxes									(834)	3,447	6,096
Income tax benefit									(1,196)	(52)	(69)
Equity in undistributed net income of Sonabank									2,063	6,813	3,124
Net income									$ 2,425	$ 10,312	$ 9,289

PARENT COMPANY FINANCIAL INF107

PARENT COMPANY FINANCIAL INFORMATION (Schedule of condensed statements of cash flows information of Southern National Bancorp of Virginia, Inc.) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating activities:
Net income	$ (1,161)	$ 4,374	$ (2,842)	$ 2,054	$ 2,192	$ 2,765	$ 2,789	$ 2,566	$ 2,425	$ 10,312	$ 9,289
Adjustments to reconcile net income to net cash and cash equivalents provided by operating activities:
Other, net									(6,069)	(2,924)	385
Net cash and cash equivalents provided by operating activities									24,587	18,023	12,219
Investing activities:
Net cash and cash equivalents provided by investing activities									(62,006)	(95,589)	(127,036)
Financing activities:
Issuance of subordinated notes, net of cost									26,075
Issuance of common stock									555	135	707
Repurchase of common stock											(721)
Dividend payment on common stock									(5,798)	(3,921)	(6,359)
Net cash and cash equivalents provided by (used in) financing activities									15,490	94,622	106,833
Increase (decrease) in cash and cash equivalents									(21,929)	17,056	(7,984)
Cash and cash equivalents at beginning of period				47,392				30,336	47,392	30,336	38,320
Cash and cash equivalents at end of period	25,463				47,392				25,463	47,392	30,336
Southern National
Operating activities:
Net income									2,425	10,312	9,289
Adjustments to reconcile net income to net cash and cash equivalents provided by operating activities:
Equity in undistributed net income of subsidiary									(6,963)	(10,413)	(9,424)
Other, net									4,046	219	262
Net cash and cash equivalents provided by operating activities									(492)	118	127
Investing activities:
Increase in investment in subsidiary									(22,000)
Dividend from bank subsidiary									4,900	3,600	6,300
Acquisition of Eastern Virginia Bankshares, Inc.									(10)
Net cash and cash equivalents provided by investing activities									(17,110)	3,600	6,300
Financing activities:
Issuance of subordinated notes, net of cost									26,075
Issuance of common stock									1,004	236	707
Repurchase of common stock											(721)
Dividend payment on common stock									(5,798)	(3,921)	(6,359)
Net cash and cash equivalents provided by (used in) financing activities									21,281	(3,685)	(6,373)
Increase (decrease) in cash and cash equivalents									3,679	33	54
Cash and cash equivalents at beginning of period				$ 856				$ 823	856	823	769
Cash and cash equivalents at end of period	$ 4,535				$ 856				$ 4,535	$ 856	$ 823

ACCUMULATED OTHER COMPREHENS108

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Schedule of the accumulated other comprehensive loss balances, net of tax) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ (789)	$ (610)	$ (3,020)
Current Period Change	(363)	(179)	2,410
Ending balance	(1,152)	(789)	(610)
Unrealized gains (losses) on securities available for sale
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(627)	(440)	(6)
Current Period Change	(372)	(187)	(434)
Ending balance	(999)	(627)	$ (440)
Accumulated Other Than Temporary Impairment [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	311
Ending balance	311	311
Accumulated Unrealized Loss On Securities Available For Sale Transferred To Held To Maturity [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(473)
Current Period Change	9
Ending balance	$ (464)	$ (473)

RELATED PARTY TRANSACTIONS (Nar

RELATED PARTY TRANSACTIONS (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Related Party Transaction [Line Items]
Related party deposit liabilities	$ 15.6	$ 5.9
Southern Trust Mortgage [Member]
Related Party Transaction [Line Items]
Related party transaction, purchases from related party	$ 102.1	$ 77.4

RELATED PARTY TRANSACTIONS (Sch

RELATED PARTY TRANSACTIONS (Schedule of changes in the loan amount outstanding during the periods) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Southern Trust Mortgage [Member]
Loans and Leases Receivable, Related Parties [Roll Forward]
Loans outstanding at January 1	$ 8,126	$ 10,438
Principal advances	238,503	149,725
Acquired from EVBS	13,044
Principal paid	(233,906)	(152,037)
Balance at December 31	25,767	$ 8,126
Officers and Directors and Principal Shareholders and Their Affiliates [Member].
Loans and Leases Receivable, Related Parties [Roll Forward]
Principal advances	2,498
Acquired from EVBS	7,871
Principal paid	(1,020)
Balance at December 31	$ 9,349

QUARTERLY FINANCIAL DATA (UN111

QUARTERLY FINANCIAL DATA (UNAUDITED) (Schedule of income statement information (unaudited)) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Interest Income	$ 27,965	$ 28,811	$ 14,249	$ 12,545	$ 12,364	$ 12,619	$ 12,291	$ 11,673	$ 83,570	$ 48,947	$ 43,701
Net Interest Income	22,971	23,850	11,205	9,891	10,055	10,373	10,174	9,712	67,917	40,314	36,624
Income Before Taxes	9,692	6,463	(3,804)	3,221	3,530	4,140	4,182	3,555	15,572	15,407	13,956
Net income	$ (1,161)	$ 4,374	$ (2,842)	$ 2,054	$ 2,192	$ 2,765	$ 2,789	$ 2,566	$ 2,425	$ 10,312	$ 9,289
Earnings per share, basic (in dollars per share)	$ (0.05)	$ 0.18	$ (0.21)	$ 0.17	$ 0.18	$ 0.23	$ 0.23	$ 0.21	$ 0.13	$ 0.84	$ 0.76
Earnings Per Share, Diluted (in dollars per share)	$ (0.05)	$ 0.18	$ (0.21)	$ 0.16	$ 0.18	$ 0.22	$ 0.23	$ 0.21	$ 0.13	$ 0.83	$ 0.75

LOW INCOME HOUSING TAX CREDITS

LOW INCOME HOUSING TAX CREDITS (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Tax credits and other tax benefits recognized related to investments	$ 227,000	$ 0
Total projected tax credits to be received	154,000
Other liabilities	18,579,000	8,117,000
Investments [Member]
Other liabilities	949,000	0
Other Assets [Member]
Investments in equity	$ 1,900,000	$ 0