American National Bankshares (AMNB) 10-Q 7 Nov 16 2016 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2016	Nov. 02, 2016
Document and Entity Information [Abstract]
Entity Registrant Name	AMERICAN NATIONAL BANKSHARES INC.
Entity Central Index Key	741,516
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		8,615,473
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q3
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2016

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	[1]
Assets
Cash and due from banks	$ 37,679	$ 19,352
Interest-bearing deposits in other banks	35,138	75,985
Securities available for sale, at fair value	351,439	340,349
Restricted stock, at cost	6,006	5,312
Loans held for sale	4,776	3,266
Loans, net of unearned income	1,083,201	1,005,525
Less allowance for loan losses	(12,757)	(12,601)
Net loans	1,070,444	992,924
Premises and equipment, net	22,846	23,567
Other real estate owned, net of valuation allowance $134 in 2016 and $329 in 2015	1,145	2,184
Goodwill	43,872	43,872
Core deposit intangibles, net	1,894	2,683
Bank owned life insurance	17,998	17,658
Accrued interest receivable and other assets	22,297	20,447
Total assets	1,615,534	1,547,599
Liabilities
Demand deposits -- noninterest bearing	339,797	322,442
Demand deposits -- interest bearing	196,696	227,030
Money market deposits	255,748	200,495
Savings deposits	119,476	115,383
Time deposits	394,291	397,310
Total deposits	1,306,008	1,262,660
Customer repurchase agreements	44,090	40,611
Other short-term borrowings	15,000	0
Long-term borrowings	9,974	9,958
Junior subordinated debt	27,698	27,622
Accrued interest payable and other liabilities	9,051	8,913
Total liabilities	1,411,821	1,349,764
Shareholders' equity
Preferred stock, $5 par, 2,000,000 shares authorized, none outstanding	0	0
Common stock, $1 par, 20,000,000 shares authorized, 8,610,741 shares outstanding at September 30, 2016 and 8,622,007 shares outstanding at December 31, 2015	8,573	8,605
Capital in excess of par value	74,839	75,375
Retained earnings	117,543	111,565
Accumulated other comprehensive income, net	2,758	2,290
Total shareholders' equity	203,713	197,835
Total liabilities and shareholders' equity	$ 1,615,534	$ 1,547,599
[1]	Derived from audited consolidated financial statements.

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Valuation allowance	$ 134	$ 329
Preferred stock, par value (in dollars per share)	$ 5	$ 5
Preferred stock, shares authorized (in shares)	2,000,000	2,000,000
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	20,000,000	20,000,000
Common stock, shares outstanding (in shares)	8,610,741	8,622,007

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Interest and Dividend Income:
Interest and fees on loans	$ 12,032	$ 11,474	$ 35,789	$ 35,011
Interest on federal funds sold	0	1	0	6
Interest and dividends on securities:
Taxable	1,112	1,052	3,346	3,021
Tax-exempt	767	899	2,407	2,799
Dividends	74	91	258	258
Other interest income	78	25	203	123
Total interest and dividend income	14,063	13,542	42,003	41,218
Interest Expense:
Interest on deposits	1,291	1,205	3,902	3,583
Interest on short-term borrowings	4	2	6	7
Interest on long-term borrowings	81	82	243	243
Interest on junior subordinated debt	223	192	644	564
Total interest expense	1,599	1,481	4,795	4,397
Net Interest Income	12,464	12,061	37,208	36,821
Provision for Loan Losses	100	0	200	700
Net Interest Income After Provision for Loan Losses	12,364	12,061	37,008	36,121
Noninterest Income:
Trust fees	938	1,006	2,829	2,963
Service charges on deposit accounts	514	521	1,520	1,543
Other fees and commissions	663	592	1,991	1,787
Mortgage banking income	512	376	1,169	987
Securities gains, net	73	6	661	553
Brokerage fees	209	255	636	681
Income from Small Business Investment Companies	0	99	238	427
Other	211	200	740	528
Total noninterest income	3,120	3,055	9,784	9,469
Noninterest Expense:
Salaries	4,626	4,179	12,872	12,634
Employee benefits	1,034	1,029	3,203	3,215
Occupancy and equipment	1,004	1,094	3,162	3,290
FDIC assessment	138	185	519	565
Bank franchise tax	257	220	769	675
Core deposit intangible amortization	213	300	789	901
Data processing	437	366	1,340	1,311
Software	301	290	872	850
Other real estate owned, net	105	(126)	314	60
Merger related expense	0	87	0	1,948
Other	1,752	1,764	5,601	5,628
Total noninterest expense	9,867	9,388	29,441	31,077
Income Before Income Taxes	5,617	5,728	17,351	14,513
Income Taxes	1,654	1,691	5,172	4,081
Net Income	$ 3,963	$ 4,037	$ 12,179	$ 10,432
Net Income Per Common Share:
Basic (in dollars per share)	$ 0.46	$ 0.47	$ 1.41	$ 1.20
Diluted (in dollars per share)	$ 0.46	$ 0.47	$ 1.41	$ 1.20
Average Common Shares Outstanding:
Basic (in shares)	8,608,323	8,668,618	8,610,100	8,698,394
Diluted (in shares)	8,618,335	8,676,571	8,618,386	8,706,870

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 3,963	$ 4,037	$ 12,179	$ 10,432
Other comprehensive income (loss):
Unrealized gains (losses) on securities available for sale	(1,424)	1,365	1,381	(29)
Tax effect	499	(478)	(483)	10
Reclassification adjustment for gains on sales of securities	(73)	(6)	(661)	(553)
Tax effect	25	3	231	194
Other comprehensive income (loss)	(973)	884	468	(378)
Comprehensive income	$ 2,990	$ 4,921	$ 12,647	$ 10,054

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total		Common Stock [Member]	Capital in Excess of Par Value [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]
Beginning Balance at Dec. 31, 2014	$ 173,780		$ 7,872	$ 57,650	$ 104,594	$ 3,664
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	10,432				10,432
Other comprehensive income (loss)	(378)					(378)
Issuance of common stock	20,483		826	19,657
Stock repurchased	(2,808)		(122)	(2,686)
Stock options exercised	399		22	377
Equity based compensation	539		13	526
Cash dividends paid	(5,996)				(5,996)
Ending Balance at Sep. 30, 2015	196,451		8,611	75,524	109,030	3,286
Beginning Balance at Jun. 30, 2015						2,402
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	4,037
Other comprehensive income (loss)	884
Ending Balance at Sep. 30, 2015	196,451		8,611	75,524	109,030	3,286
Beginning Balance at Dec. 31, 2015	197,835	[1]	8,605	75,375	111,565	2,290
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	12,179				12,179
Other comprehensive income (loss)	468					468
Stock repurchased	(1,292)		(51)	(1,241)
Stock options exercised	101		4	97
Vesting of restricted stock			5	(5)
Equity based compensation	623		10	613
Cash dividends paid	(6,201)				(6,201)
Ending Balance at Sep. 30, 2016	203,713		8,573	74,839	117,543	2,758
Beginning Balance at Jun. 30, 2016						3,731
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,963
Other comprehensive income (loss)	(973)
Ending Balance at Sep. 30, 2016	$ 203,713		$ 8,573	$ 74,839	$ 117,543	$ 2,758
[1]	Derived from audited consolidated financial statements.

Consolidated Statements of Cha7

Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Stock repurchased during period (in shares)	51,384	121,636
Stock options exercised (in shares)	4,134	22,074
Vesting of restricted stock (in shares)	5,510
Equity-based compensation (in shares)	35,984	30,831
Cash dividends paid (in dollars per share)	$ 0.72	$ 0.69
Common Stock [Member]
Issuance of common stock (in shares)		825,586

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash Flows from Operating Activities:
Net income	$ 12,179	$ 10,432
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	200	700
Depreciation	1,409	1,357
Net accretion of acquisition accounting adjustments	(1,709)	(2,503)
Core deposit intangible amortization	789	901
Net amortization of securities	2,034	2,062
Net gains on sale or call of securities	(661)	(553)
Gain on sale of loans held for sale	(906)	(771)
Proceeds from sales of loans held for sale	53,266	42,691
Originations of loans held for sale	(53,870)	(44,302)
Net loss (gain) on other real estate owned	72	(199)
Valuation allowance on other real estate owned	156	86
Net loss on sale of premises and equipment	9	5
Equity based compensation expense	623	539
Net change in bank owned life insurance	(340)	(343)
Deferred income tax (benefit) expense	(1,596)	1,482
Net change in interest receivable	(458)	491
Net change in other assets	(211)	107
Net change in interest payable	(18)	3
Net change in other liabilities	156	(606)
Net cash provided by operating activities	11,124	11,579
Cash Flows from Investing Activities:
Proceeds from sales of securities available for sale	9,317	7,429
Proceeds from maturities, calls and paydowns of securities available for sale	116,254	70,759
Purchases of securities available for sale	(137,314)	(75,069)
Net change in restricted stock	(694)	(354)
Net increase in loans	(76,015)	(24,073)
Proceeds from sale of premises and equipment	1	42
Purchases of premises and equipment	(536)	(1,203)
Proceeds from sales of other real estate owned	908	1,993
Cash paid in bank acquisition	0	(5,935)
Cash acquired in bank acquisition	0	18,173
Net cash used in investing activities	(88,079)	(8,238)
Cash Flows from Financing Activities:
Net change in demand, money market, and savings deposits	46,367	31,727
Net change in time deposits	(3,019)	(18,148)
Net change in customer repurchase agreements	3,479	(9,901)
Net change in other short-term borrowings	15,000	0
Common stock dividends paid	(6,201)	(5,996)
Repurchase of common stock	(1,292)	(2,808)
Proceeds from exercise of stock options	101	399
Net cash provided by (used in) financing activities	54,435	(4,727)
Net Decrease in Cash and Cash Equivalents	(22,520)	(1,386)
Cash and Cash Equivalents at Beginning of Period	95,337	67,303
Cash and Cash Equivalents at End of Period	$ 72,817	$ 65,917

Accounting Policies

Accounting Policies	9 Months Ended
	Sep. 30, 2016
Accounting Policies [Abstract]
Accounting Policies	Accounting Policies The consolidated financial statements include the accounts of American National Bankshares Inc. (the "Company") and its wholly owned subsidiary, American National Bank and Trust Company (the "Bank"). The Bank offers a wide variety of retail, commercial, secondary market mortgage lending, and trust and investment services which also include non-deposit products such as mutual funds and insurance policies. The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change in the near term relate to the determination of the allowance for loan losses, goodwill and intangible assets, other than temporary impairment, the valuation of deferred tax assets and liabilities, and the valuation of other real estate owned ("OREO"). All significant inter-company transactions and accounts are eliminated in consolidation, with the exception of the AMNB Trust and the MidCarolina Trusts, as detailed in Note 9. In the opinion of management, the accompanying unaudited consolidated financial statements contain all adjustments (consisting of normal recurring accruals) necessary to present fairly the results of the interim periods. The results of operations for the interim periods are not necessarily indicative of the results that may occur for any other period. Certain reclassifications have been made to prior period balances to conform to the current period presentation. These reclassifications did not have an impact on net income and were considered immaterial. These statements should be read in conjunction with the Notes to Consolidated Financial Statements included in the Company's Annual Report on Form 10-K for the year ended December 31, 2015 . Recent Accounting Pronouncements In August 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2014-15, "Presentation of Financial Statements - Going Concern (Subtopic 205-40): Disclosure of Uncertainties about an Entity's Ability to Continue as a Going Concern." This update is intended to provide guidance about management's responsibility to evaluate whether there is substantial doubt about an entity's ability to continue as a going concern and to provide related footnote disclosures. Management is required under the new guidance to evaluate whether there are conditions or events, considered in the aggregate, that raise substantial doubt about the entity's ability to continue as a going concern within one year after the date the financial statements are issued when preparing financial statements for each interim and annual reporting period. If conditions or events are identified, the ASU specifies the process that must be followed by management and also clarifies the timing and content of going concern footnote disclosures in order to reduce diversity in practice. The amendments in this ASU are effective for annual periods and interim periods within those annual periods beginning after December 15, 2016. Early adoption is permitted. The Company does not expect the adoption of ASU 2014-15 to have a material impact on its consolidated financial statements. In January 2016, the FASB issued ASU 2016-01, "Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities." The amendments in ASU 2016-01, among other things: (1) requires equity investments (except 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; (2) requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; (3) Requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset (i.e., securities or loans and receivables); and (4) eliminates the requirement for public business entities to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost. 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. The Company is currently assessing the impact that ASU 2016-01 will have on its consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02, "Leases (Topic 842)." Among other things, in the amendments in ASU 2016-02, lessees will be required to recognize the following for all leases (with the exception of short-term leases) at the commencement date: (1) a lease liability, which is a lessee's obligation to make lease payments arising from a lease, measured on a discounted basis; and (2) a right-of-use asset, which is an asset that represents the lessee's right to use, or control the use of, a specified asset for the lease term. Under the new guidance, lessor accounting is largely unchanged. Certain targeted improvements were made to align, where necessary, lessor accounting with the lessee accounting model and Topic 606, Revenue from Contracts with Customers. The amendments in this ASU are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early application is permitted upon issuance. Lessees (for capital and operating leases) and lessors (for sales-type, direct financing, and operating leases) must apply a modified retrospective transition approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The modified retrospective approach would not require any transition accounting for leases that expired before the earliest comparative period presented. Lessees and lessors may not apply a full retrospective transition approach. The Company is currently assessing the impact that ASU 2016-02 will have on its consolidated financial statements. During March 2016, the FASB issued ASU No. 2016-05, "Derivatives and Hedging (Topic 815): Effect of Derivative Contract Novations on Existing Hedge Accounting Relationships." The amendments in this ASU clarify that a change in the counterparty to a derivative instrument that has been designated as the hedging instrument does not, in and of itself, require dedesignation of that hedging relationship provided that all other hedge accounting criteria remain intact. The amendments are effective for public business entities for financial statements issued for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. The Company does not expect the adoption of ASU 2016-05 to have a material impact on its consolidated financial statements. In March 2016, the FASB issued ASU No. 2016-07, "Investments - Equity Method and Joint Ventures (Topic 323): Simplifying the Transition to the Equity Method of Accounting." The amendments in this ASU 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. Therefore, upon qualifying for the equity method of accounting, no retroactive adjustment of the investment is required. In addition, the amendments in this ASU 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 increases in the level of ownership interest or degree of influence that result in the adoption of the equity method. Early adoption is permitted. The Company does not expect the adoption of ASU 2016-07 to have a material impact on its consolidated financial statements. During March 2016, the FASB issued ASU No. 2016-09, "Compensation - Stock Compensation (Topic 718): Improvements to Employee Shares-Based Payment Accounting." The amendments in this ASU simplify several aspects of the accounting for share-based payment award transactions including: (1) income tax consequences; (2) classification of awards as either equity or liabilities; and (3) classification on the statement of cash flows. The amendments are effective for public companies for annual periods beginning after December 15, 2016, and interim periods within those annual periods. The Company is currently assessing the impact that ASU 2016-09 will have on its consolidated financial statements. During June 2016, the FASB issued ASU No. 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.” The amendments in this ASU, among other things, require the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. Financial institutions and other organizations will now use forward-looking information to better inform their credit loss estimates. Many of the loss estimation techniques applied today will still be permitted, although the inputs to those techniques will change to reflect the full amount of expected credit losses. In addition, the ASU amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. The amendments in this ASU are effective for Securities and Exchange Commission ("SEC") filers for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. For public companies that are not SEC filers, the amendments in this ASU are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. The Company is currently assessing the impact that ASU 2016-13 will have on its consolidated financial statements. During August 2016, the FASB issued ASU No. 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments”, to address diversity in how certain cash receipts and cash payments are presented and classified in the statement of cash flows. The amendments are effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. The amendments should be applied using a retrospective transition method to each period presented. If retrospective application is impractical for some of the issues addressed by the update, the amendments for those issues would be applied prospectively as of the earliest date practicable. Early adoption is permitted, including adoption in an interim period. The Company does not expect the adoption of ASU 2016-15 to have a material impact on its consolidated financial statements.

Acquisition of MainStreet Banks

Acquisition of MainStreet Bankshares, Inc.	9 Months Ended
	Sep. 30, 2016
Business Combinations [Abstract]
Acquisition of MainStreet Bankshares, Inc.	Acquisition of MainStreet BankShares, Inc. On January 1, 2015, the Company completed its acquisition of MainStreet BankShares, Inc. ("MainStreet"). The merger of MainStreet with and into the Company was effected pursuant to the terms and conditions of the Agreement and Plan of Reorganization, dated as of August 24, 2014, between the Company and MainStreet, and a related Plan of Merger. Immediately after the merger, Franklin Community Bank, N.A., MainStreet's wholly owned bank subsidiary, merged with and into the Bank. Pursuant to the MainStreet merger agreement, the former holders of shares of MainStreet common stock received $3.46 in cash and 0.482 shares of the Company's common stock for each share of MainStreet common stock held immediately prior to the effective date of the merger, plus cash in lieu of fractional shares. Each option to purchase shares of MainStreet common stock that was outstanding immediately prior to the effective date of the merger vested upon the merger and was converted into an option to purchase shares of the Company's common stock, adjusted based on a 0.643 exchange ratio. Each share of the Company's common stock outstanding immediately prior to the merger remained outstanding and was unaffected by the merger. The cash portion of the merger consideration was funded through a cash dividend of $6,000,000 from the Bank to the Company, and no borrowing was incurred by the Company or the Bank in connection with the merger. Replacement stock option awards representing 43,086 shares of the Company's common stock were granted in conjunction with the MainStreet acquisition. MainStreet was the holding company for Franklin Community Bank, N.A. As of January 1, 2015, MainStreet had net loans of approximately $122,000,000 , total assets of approximately $164,000,000 , and total deposits of approximately $137,000,000 . Franklin Community Bank, N.A. provided banking services to its customers from three banking offices located in Rocky Mount, Hardy, and Union Hall, Virginia, which are now branch offices of the Bank. The net impact of the amortization and accretion of premiums and discounts associated with the Company's acquisition accounting adjustments related to the MainStreet acquisition had the following impact on the Consolidated Statements of Income during the nine months ended September 30, 2016 and 2015 (dollars in thousands): Nine Months Ended September 30, 2016 September 30, 2015 Acquired performing loans $ 203 $ 317 Acquired impaired loans 445 827 CD valuation — 216 Brokered CD valuation — 2 Amortization of core deposit intangible (185 ) (220 ) Net impact to income before taxes $ 463 $ 1,142

Securities

Securities	9 Months Ended
	Sep. 30, 2016
Investments, Debt and Equity Securities [Abstract]
Securities	Securities The amortized cost and fair value of investments in debt and equity securities at September 30, 2016 and December 31, 2015 were as follows (dollars in thousands): September 30, 2016 Amortized Unrealized Unrealized Securities available for sale: Federal agencies and GSEs $ 96,840 $ 225 $ 87 $ 96,978 Mortgage-backed and CMOs 79,631 1,376 20 80,987 State and municipal 157,922 4,924 26 162,820 Corporate 8,697 123 — 8,820 Equity securities 1,288 546 — 1,834 Total securities available for sale $ 344,378 $ 7,194 $ 133 $ 351,439 December 31, 2015 Amortized Unrealized Unrealized Securities available for sale: Federal agencies and GSEs $ 81,601 $ 170 $ 319 $ 81,452 Mortgage-backed and CMOs 70,520 799 389 70,930 State and municipal 170,268 5,659 36 175,891 Corporate 10,619 28 57 10,590 Equity securities 1,000 486 — 1,486 Total securities available for sale $ 334,008 $ 7,142 $ 801 $ 340,349 Restricted Stock Due to restrictions placed upon the Bank's common stock investment in the Federal Reserve Bank of Richmond ("FRB") and Federal Home Loan Bank of Atlanta ("FHLB"), these securities have been classified as restricted equity securities and carried at cost. The restricted securities are not subject to the investment security classification and are included as a separate line item on the Company's Consolidated Balance Sheet. The FRB requires the Bank to maintain stock with a par value equal to 3.0% of its outstanding capital and an additional 3.0% is on call. The FHLB requires the Bank to maintain stock in an amount equal to 4.5% of outstanding borrowings and a specific percentage of the Bank's total assets. The cost of restricted stock at September 30, 2016 and December 31, 2015 was as follows (dollars in thousands): September 30, December 31, FRB stock $ 3,553 $ 3,535 FHLB stock 2,453 1,777 Total restricted stock $ 6,006 $ 5,312 Temporarily Impaired Securities The following table shows estimated fair value and gross unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at September 30, 2016 . The reference point for determining when securities are in an unrealized loss position is month-end. Therefore, it is possible that a security's market value exceeded its amortized cost on other days during the past twelve-month period. Available for sale securities that have been in a continuous unrealized loss position are as follows (dollars in thousands): Total Less than 12 Months 12 Months or More Fair Unrealized Fair Unrealized Fair Unrealized Federal agencies and GSEs $ 35,876 $ 87 $ 35,876 $ 87 $ — $ — Mortgage-backed and CMOs 2,140 20 334 1 1,806 19 State and municipal 8,906 26 8,089 26 817 — Total $ 46,922 $ 133 $ 44,299 $ 114 $ 2,623 $ 19 Federal agencies and GSEs: The unrealized loss on the Company's investment in eight government sponsored entity ("GSE") securities was caused by interest rate increases. The contractual terms of those investments do not permit the issuer to settle the securities at a price less than the amortized cost basis of the investments. Because the Company does not intend to sell the investments and it is not more likely than not that the Company will be required to sell the investments before recovery of their amortized cost basis, which may be maturity, the Company does not consider those investments to be other-than-temporarily impaired at September 30, 2016 . Mortgage-backed securities and CMOs: The unrealized losses on the Company's investment in six GSE mortgage-backed securities and collateralized mortgage obligations ("CMOs") were caused by interest rate increases. The contractual cash flows of those investments are guaranteed by an agency of the U.S. Government. Accordingly, it is expected that the securities would not be settled at a price less than the amortized cost basis of the Company's investments. Because the decline in market value is attributable to changes in interest rates and not credit quality, and because the Company does not intend to sell the investments and it is not more likely than not that the Company will be required to sell the investments before recovery of their amortized cost basis, which may be maturity, the Company does not consider those investments to be other-than-temporarily impaired at September 30, 2016 . State and municipal securities : The unrealized losses on 13 state and municipal securities were caused by interest rate increases. The contractual terms of those investments do not permit the issuer to settle the securities at a price less than the amortized cost basis of the investments. Because the Company does not intend to sell the investments and it is not more likely than not that the Company will be required to sell the investments before recovery of their amortized cost basis, which may be maturity, the Company does not consider those investments to be other-than-temporarily impaired at September 30, 2016 . Corporate securities : The Company had zero investments with unrealized losses in corporate securities. In prior periods when unrealized losses were shown they were caused by interest rate increases. The contractual terms of those investments did not permit the issuer to settle the securities at a price less than the amortized cost basis of the investments. Because the Company did not intend to sell the investments and it was not more likely than not that the Company would be required to sell the investments before recovery of their amortized cost basis, which may have been maturity, the Company did not consider those investments to be other-than-temporarily impaired at September 30, 2016 . Restricted stock: When evaluating restricted stock for impairment, its value is based on the ultimate recoverability of the par value rather than by recognizing temporary declines in value. The Company does not consider restricted stock to be other-than-temporarily impaired at September 30, 2016 , and no impairment has been recognized. The table below shows estimated fair value and gross unrealized losses, aggregated by investment category and length of time that individual securities had been in a continuous unrealized loss position, at December 31, 2015 (dollars in thousands): Total Less than 12 Months 12 Months or More Fair Unrealized Fair Unrealized Fair Unrealized Federal agencies and GSEs $ 57,711 $ 319 $ 57,711 $ 319 $ — $ — Mortgage-backed and CMOs 37,368 389 35,424 346 1,944 43 State and municipal 13,540 36 12,716 34 824 2 Corporate 5,107 57 3,530 29 1,577 28 Total $ 113,726 $ 801 $ 109,381 $ 728 $ 4,345 $ 73 Other-Than-Temporary-Impaired Securities As of September 30, 2016 and December 31, 2015 , there were no securities classified as other-than-temporary impaired.

Loans

Loans	9 Months Ended
	Sep. 30, 2016
Receivables [Abstract]
Loans	Loans Loans, excluding loans held for sale, at September 30, 2016 and December 31, 2015 , were comprised of the following (dollars in thousands): September 30, December 31, 2015 Commercial $ 204,184 $ 177,481 Commercial real estate: Construction and land development 91,688 72,968 Commercial real estate 454,797 430,186 Residential real estate: Residential 218,632 220,434 Home equity 108,617 98,449 Consumer 5,283 6,007 Total loans $ 1,083,201 $ 1,005,525 Acquired Loans The outstanding principal balance and the carrying amount of these loans included in the consolidated balance sheets at September 30, 2016 and December 31, 2015 are as follows (dollars in thousands): September 30, December 31, 2015 Outstanding principal balance $ 112,205 $ 145,380 Carrying amount 103,911 135,254 The outstanding principal balance and related carrying amount of acquired impaired loans, for which the Company applies FASB Accounting Standards Codification ("ASC") 310-30 to account for interest earned, as of the indicated dates are as follows (dollars in thousands): September 30, December 31, 2015 Outstanding principal balance $ 35,697 $ 40,951 Carrying amount 29,739 33,878 The following table presents changes in the accretable yield on acquired impaired loans, for which the Company applies FASB ASC 310-30, at September 30, 2016 and December 31, 2015 (dollars in thousands): September 30, 2016 December 31, 2015 Balance at January 1 $ 7,299 $ 1,440 Additions from merger with MainStreet — 7,140 Accretion (1,079 ) (211 ) Other changes, net 201 (1,070 ) $ 6,421 $ 7,299 Past Due Loans The following table shows an analysis by portfolio segment of the Company's past due loans at September 30, 2016 (dollars in thousands): 30- 59 Days 60-89 Days 90 Days + Non- Total Current Total Commercial $ 13 $ — $ — $ 67 $ 80 $ 204,104 $ 204,184 Commercial real estate: Construction and land development 15 — — 66 81 91,607 91,688 Commercial real estate 129 114 — 905 1,148 453,649 454,797 Residential: Residential 517 73 — 2,073 2,663 215,969 218,632 Home equity 95 34 — 726 855 107,762 108,617 Consumer 2 18 — 9 29 5,254 5,283 Total $ 771 $ 239 $ — $ 3,846 $ 4,856 $ 1,078,345 $ 1,083,201 The following table shows an analysis by portfolio segment of the Company's past due loans at December 31, 2015 (dollars in thousands): 30- 59 Days 60-89 Days 90 Days + Non- Total Current Total Commercial $ 137 $ — $ — $ 90 $ 227 $ 177,254 $ 177,481 Commercial real estate: Construction and land development — — — 258 258 72,710 72,968 Commercial real estate 135 182 — 2,497 2,814 427,372 430,186 Residential: Residential 913 398 — 1,731 3,042 217,392 220,434 Home equity 140 12 — 620 772 97,677 98,449 Consumer 53 1 — 9 63 5,944 6,007 Total $ 1,378 $ 593 $ — $ 5,205 $ 7,176 $ 998,349 $ 1,005,525 Impaired Loans The following table presents the Company's impaired loan balances by portfolio segment, excluding acquired impaired loans, at September 30, 2016 (dollars in thousands): Recorded Unpaid Related Average Interest With no related allowance recorded: Commercial $ 25 $ 25 $ — $ 9 $ 1 Commercial real estate: Construction and land development 238 238 — 238 13 Commercial real estate 1,837 1,838 — 1,282 76 Residential: Residential 395 405 — 198 20 Home equity 409 602 — 189 16 Consumer 10 10 — 11 1 $ 2,914 $ 3,118 $ — $ 1,927 $ 127 With a related allowance recorded: Commercial * 67 67 — 93 1 Commercial real estate: Construction and land development* 65 66 — 324 10 Commercial real estate* 146 145 — 346 7 Residential Residential 1,563 1,565 21 1,582 16 Home equity 316 317 1 335 2 Consumer* 9 9 — 13 — $ 2,166 $ 2,169 $ 22 $ 2,693 $ 36 Total: Commercial $ 92 $ 92 $ — $ 102 $ 2 Commercial real estate: Construction and land development 303 304 — 562 23 Commercial real estate 1,983 1,983 — 1,628 83 Residential: Residential 1,958 1,970 21 1,780 36 Home equity 725 919 1 524 18 Consumer 19 19 — 24 1 $ 5,080 $ 5,287 $ 22 $ 4,620 $ 163 *Allowance is reported as zero in the table due to presentation in thousands and rounding. The following table presents the Company's impaired loan balances by portfolio segment, excluding acquired impaired loans, at December 31, 2015 (dollars in thousands): Recorded Unpaid Related Average Interest With no related allowance recorded: Commercial $ 4 $ 4 $ — $ 47 $ — Commercial real estate: Construction and land development 205 205 — 220 — Commercial real estate 1,202 1,206 — 1,504 1 Residential: Residential 127 124 — 126 — Home equity 173 173 — 305 — Consumer 13 13 — 14 — $ 1,724 $ 1,725 $ — $ 2,216 $ 1 With a related allowance recorded: Commercial* $ 91 $ 91 $ — $ 99 $ — Commercial real estate: Construction and land development 448 449 6 563 26 Commercial real estate 390 391 3 353 17 Residential: Residential* 1,649 1,690 — 1,034 22 Home equity 397 396 25 327 — Consumer 8 9 1 11 — $ 2,983 $ 3,026 $ 35 $ 2,387 $ 65 Total: Commercial $ 95 $ 95 $ — $ 146 $ — Commercial real estate: Construction and land development 653 654 6 783 26 Commercial real estate 1,592 1,597 3 1,857 18 Residential: Residential 1,776 1,814 — 1,160 22 Home equity 570 569 25 632 — Consumer 21 22 1 25 — $ 4,707 $ 4,751 $ 35 $ 4,603 $ 66 *Allowance is reported as zero in the table due to presentation in thousands and rounding. The following tables show the detail of loans modified as troubled debt restructurings ("TDRs") during the three and nine months ended September 30, 2016 included in the impaired loan balances (dollars in thousands): Loans Modified as a TDR for the Three Months Ended September 30, 2016 Loan Type Number of Contracts Pre-Modification Post-Modification Commercial — $ — $ — Commercial real estate — — — Construction and land development — — — Home Equity — — — Residential real estate 1 56 47 Consumer — — — Total 1 $ 56 $ 47 Loans Modified as a TDR for the Nine Months Ended September 30, 2016 Loan Type Number of Contracts Pre-Modification Post-Modification Commercial 1 $ 24 $ 24 Commercial real estate 2 1,005 1,003 Construction and land development — — — Home Equity — — — Residential real estate 2 58 48 Consumer — — — Total 5 $ 1,087 $ 1,075 The following tables show the detail of loans modified as TDRs during the three and nine months ended September 30, 2015 included in the impaired loan balances (dollars in thousands): Loans Modified as a TDR for the Three Months Ended September 30, 2015 Loan Type Number of Contracts Pre-Modification Post-Modification Commercial 2 $ 52 $ 31 Commercial real estate — — — Construction and land development — — — Home Equity 1 106 106 Residential real estate 1 382 294 Consumer — — — Total 4 $ 540 $ 431 Loans Modified as a TDR for the Nine Months Ended September 30, 2015 Loan Type Number of Contracts Pre-Modification Post-Modification Commercial 2 $ 52 $ 31 Commercial real estate 3 256 249 Construction and land development — — — Home Equity 1 106 106 Residential real estate 5 776 680 Consumer — — — Total 11 $ 1,190 $ 1,066 During the three and nine months ended September 30, 2016 and 2015 , the Company had no loans that subsequently defaulted within twelve months of modification. The Company defines defaults as one or more payments that occur more than 90 days past the due date, charge-off or foreclosure subsequent to modification. Residential Real Estate in Process of Foreclosure The Company had $1,424,000 in residential real estate loans in the process of foreclosure at September 30, 2016 and $ 470,000 and $ 643,000 in residential OREO at September 30, 2016 and December 31, 2015 , respectively. Risk Grades The following table shows the Company's loan portfolio broken down by internal risk grading as of September 30, 2016 (dollars in thousands): Commercial and Consumer Credit Exposure Credit Risk Profile by Internally Assigned Grade Commercial Construction and Land Development Commercial Residential Home Pass $ 203,353 $ 88,992 $ 443,317 $ 202,043 $ 106,106 Special Mention 688 792 6,755 11,637 1,373 Substandard 143 1,904 4,725 4,952 1,138 Doubtful — — — — — Total $ 204,184 $ 91,688 $ 454,797 $ 218,632 $ 108,617 Consumer Credit Exposure Credit Risk Profile Based on Payment Activity Consumer Performing $ 5,249 Nonperforming 34 Total $ 5,283 The following table shows the Company's loan portfolio broken down by internal risk grading as of December 31, 2015 (dollars in thousands): Commercial and Consumer Credit Exposure Credit Risk Profile by Internally Assigned Grade Commercial Construction and Land Development Commercial Residential Home Pass $ 175,963 $ 68,853 $ 418,719 $ 200,008 $ 96,142 Special Mention 1,364 1,210 5,860 14,638 1,314 Substandard 154 2,905 5,607 5,788 993 Doubtful — — — — — Total $ 177,481 $ 72,968 $ 430,186 $ 220,434 $ 98,449 Consumer Credit Exposure Credit Risk Profile Based on Payment Activity Consumer Performing $ 5,999 Nonperforming 8 Total $ 6,007 Loans classified in the Pass category typically are fundamentally sound and risk factors are reasonable and acceptable. Loans classified in the Special Mention category typically have been criticized internally, by loan review or the loan officer, or by external regulators under the current credit policy regarding risk grades. Loans classified in the Substandard category typically have a well-defined weakness or weaknesses that jeopardize the liquidation of the debt; they are typically characterized by the possibility that the Bank will sustain some loss if the deficiencies are not corrected. Loans classified in the Doubtful category typically have all the weaknesses inherent in loans classified as substandard, plus 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. However, these loans are not yet rated as loss because certain events may occur that may salvage the debt. Consumer loans are classified as performing or nonperforming. A loan is nonperforming when payments of interest and principal are past due 90 days or more, or payments are less than 90 days past due, but there are other good reasons to doubt that payment will be made in full.

Allowance for Loan Losses and R

Allowance for Loan Losses and Reserve for Unfunded Lending Commitments	9 Months Ended
	Sep. 30, 2016
Receivables [Abstract]
Allowance for Loan Losses and Reserve for Unfunded Lending Commitments	Allowance for Loan Losses and Reserve for Unfunded Lending Commitments Changes in the allowance for loan losses and the reserve for unfunded lending commitments as of the indicated dates and periods are presented below (dollars in thousands): Nine Months Ended Year Ended December 31, Nine Months Ended Allowance for Loan Losses Balance, beginning of period $ 12,601 $ 12,427 $ 12,427 Provision for loan losses 200 950 700 Charge-offs (245 ) (1,200 ) (883 ) Recoveries 201 424 367 Balance, end of period $ 12,757 $ 12,601 $ 12,611 Reserve for Unfunded Lending Commitments Balance, beginning of period $ 184 $ 163 $ 163 Provision for unfunded commitments 11 21 26 Charge-offs — — — Balance, end of period $ 195 $ 184 $ 189 The reserve for unfunded loan commitments is included in other liabilities. The following table presents changes in the Company's allowance for loan losses by portfolio segment and the related loan balance total by segment at and for the nine months ended September 30, 2016 (dollars in thousands): Commercial Commercial Residential Consumer Total Allowance for Loan Losses Balance at December 31, 2015: $ 2,065 $ 6,930 $ 3,546 $ 60 $ 12,601 Charge-offs (40 ) — (63 ) (142 ) (245 ) Recoveries 26 22 56 97 201 Provision for loan losses 164 39 (42 ) 39 200 Balance at September 30, 2016: $ 2,215 $ 6,991 $ 3,497 $ 54 $ 12,757 Balance at September 30, 2016: Allowance for Loan Losses Individually evaluated for impairment $ — $ — $ 22 $ — $ 22 Collectively evaluated for impairment 2,201 6,867 3,249 54 12,371 Acquired impaired loans 14 124 226 — 364 Total $ 2,215 $ 6,991 $ 3,497 $ 54 $ 12,757 Loans Individually evaluated for impairment $ 92 $ 2,286 $ 2,683 $ 19 $ 5,080 Collectively evaluated for impairment 203,588 530,892 308,654 5,248 1,048,382 Acquired impaired loans 504 13,307 15,912 16 29,739 Total $ 204,184 $ 546,485 $ 327,249 $ 5,283 $ 1,083,201 The following table presents changes in the Company's allowance for loan losses by portfolio segment and the related loan balance total by segment at and for the year ended December 31, 2015 (dollars in thousands): Commercial Commercial Residential Consumer Total Allowance for Loan Losses Balance at December 31, 2014: $ 1,818 $ 6,814 $ 3,715 $ 80 $ 12,427 Charge-offs (175 ) (482 ) (323 ) (220 ) (1,200 ) Recoveries 32 124 139 129 424 Provision for loan losses 390 474 15 71 950 Balance at December 31, 2015: $ 2,065 $ 6,930 $ 3,546 $ 60 $ 12,601 Balance at December 31, 2015: Allowance for Loan Losses Individually evaluated for impairment $ — $ 9 $ 26 $ — $ 35 Collectively evaluated for impairment 2,065 6,750 3,284 60 12,159 Acquired impaired loans — 171 236 — 407 Total $ 2,065 $ 6,930 $ 3,546 $ 60 $ 12,601 Loans Individually evaluated for impairment $ 95 $ 2,245 $ 2,346 $ 21 $ 4,707 Collectively evaluated for impairment 176,798 487,177 297,281 5,684 966,940 Acquired impaired loans 588 13,732 19,256 302 33,878 Total $ 177,481 $ 503,154 $ 318,883 $ 6,007 $ 1,005,525 The allowance for loan losses is allocated to loan segments based upon historical loss factors, risk grades on individual loans, portfolio analysis of smaller balance homogenous loans, and qualitative factors. Qualitative factors include trends in delinquencies, nonaccrual loans, and loss rates; trends in volume and terms of loans, effects of changes in risk selection, underwriting standards, and lending policies; experience of lending officers, other lending staff and loan review; national, regional, and local economic trends and conditions; legal, regulatory and collateral factors; and concentrations of credit.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	9 Months Ended
	Sep. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets The Company records as goodwill the excess of the purchase price over the fair value of the identifiable net assets acquired. Impairment testing is performed annually, as well as when an event triggering impairment may have occurred. The Company performs its annual analysis as of June 30 each fiscal year. Accounting guidance permits preliminary assessment of qualitative factors to determine whether more substantial impairment testing is required. The Company chose to bypass the preliminary assessment and utilized a two-step process for impairment testing of goodwill. The first step tests for impairment, while the second step, if necessary, measures the impairment. No indicators of impairment were identified as of June 30, 2016. Core deposit intangibles resulting from the acquisition of MidCarolina Financial Corporation ("MidCarolina") in July 2011 were $6,556,000 and are being amortized on an accelerated basis over 108 months. Core deposit intangibles resulting from the MainStreet acquisition in January 2015 were $1,839,000 and are being amortized on an accelerated basis over 120 months . The changes in the carrying amount of goodwill and intangibles for the nine months ended September 30, 2016 , are as follows (dollars in thousands): Goodwill Intangibles Balance at December 31, 2015 $ 43,872 $ 2,683 Additions — — Amortization — (789 ) Impairment — — Balance at September 30, 2016 $ 43,872 $ 1,894

Short-term Borrowings

Short-term Borrowings	9 Months Ended
	Sep. 30, 2016
Debt Disclosure [Abstract]
Short-term Borrowings	Short-term Borrowings Short-term borrowings consist of customer repurchase agreements, overnight borrowings from the FHLB, and Federal Funds purchased. The Company has federal funds lines of credit established with two correspondent banks in the amounts of $15,000,000 , each, and, additionally, has access to the FRB's discount window. Customer repurchase agreements are collateralized by securities of the U.S. Government or its agencies or GSEs. They mature daily. The interest rates may be changed at the discretion of the Company. The securities underlying these agreements remain under the Company's control. FHLB overnight borrowings contain floating interest rates that may change daily at the discretion of the FHLB. Federal funds purchased are unsecured overnight borrowings from other financial institutions. Short-term borrowings consisted of the following at September 30, 2016 and December 31, 2015 (dollars in thousands): September 30, 2016 December 31, 2015 Customer repurchase agreements $ 44,090 $ 40,611 Other short-term borrowings 15,000 — $ 59,090 $ 40,611

Long-term Borrowings

Long-term Borrowings	9 Months Ended
	Sep. 30, 2016
Debt Disclosure [Abstract]
Long-term Borrowings	Long-term Borrowings Under the terms of its collateral agreement with the FHLB, the Company provides a blanket lien covering all of its residential first mortgage loans, second mortgage loans, home equity lines of credit, and commercial real estate loans. In addition, the Company pledges as collateral its capital stock in the FHLB and deposits with the FHLB. The Company has a line of credit with the FHLB equal to 30% of the Company's assets, subject to the amount of collateral pledged. As of September 30, 2016 , $402,920,000 in eligible collateral was pledged under the blanket floating lien agreement which covers both short-term and long-term borrowings. Long-term borrowings consisted of the following fixed rate, long-term advances as of September 30, 2016 and December 31, 2015 (dollars in thousands): September 30, 2016 December 31, 2015 Due by Advance Amount Weighted Due by Advance Amount Weighted November 30, 2017 $ 9,974 2.98 % November 30, 2017 $ 9,958 2.98 % The advance due in November 2017 is net of a fair value discount of $26,000 . The original discount recorded on July 1, 2011, was a result of the merger with MidCarolina. The adjustment to the face value is being amortized into interest expense over the life of the borrowing. There were no long-term borrowings acquired in the MainStreet acquisition and no borrowings were incurred to fund the acquisition. In the regular course of conducting its business, the Company takes deposits from political subdivisions of the states of Virginia and North Carolina. At September 30, 2016 , the Bank's public deposits totaled $150,467,000 . The Company is required to provide collateral to secure the deposits that exceed the insurance coverage provided by the Federal Deposit Insurance Corporation. This collateral can be provided in the form of certain types of government or agency bonds or letters of credit from the FHLB. At September 30, 2016 , the Company had $70,000,000 in letters of credit with the FHLB outstanding, as well as $133,297,000 in agency, state, and municipal securities pledged to provide collateral for such deposits.

Junior Subordinated Debt

Junior Subordinated Debt	9 Months Ended
	Sep. 30, 2016
Trust Preferred Capital Notes [Abstract]
Junior Subordinated Debt	Junior Subordinated Debt On April 7, 2006, AMNB Statutory Trust I, a Delaware statutory trust and a wholly owned unconsolidated subsidiary of the Company, issued $ 20,000,000 of preferred securities (the "Trust Preferred Securities") in a private placement pursuant to an applicable exemption from registration. The Trust Preferred Securities mature on June 30, 2036 , but may be redeemed at the Company's option beginning on September 30, 2011. Distributions are cumulative and will accrue from the date of original issuance, but may be deferred by the Company from time to time for up to 20 consecutive quarterly periods. The Company has guaranteed the payment of all required distributions on the Trust Preferred Securities. The proceeds of the Trust Preferred Securities received by the trust, along with proceeds of $ 619,000 received by the trust from the issuance of common securities by the trust to the Company, were used to purchase $20,619,000 of the Company's junior subordinated debt securities (the "Junior Subordinated Debt"), issued pursuant to junior subordinated debentures entered into between the Company and Wilmington Trust Company, as trustee. The proceeds of the Junior Subordinated Debt were used to fund the cash portion of the merger consideration to the former shareholders of Community First Financial Corporation in connection with the Company's acquisition of that company in 2006, and for general corporate purposes. On July 1, 2011, in connection with the MidCarolina merger, the Company assumed $8,764,000 in junior subordinated debt to MidCarolina Trust I and MidCarolina Trust II, two separate Delaware statutory trusts (the "MidCarolina Trusts"), to fully and unconditionally guarantee the preferred securities issued by the MidCarolina Trusts. These long-term obligations, which currently qualify as Tier 1 capital, constitute a full and unconditional guarantee by the Company of the MidCarolina Trusts' obligations. The MidCarolina Trusts were not consolidated in the Company's financial statements. In accordance with ASC 810-10-15-14, "Consolidation - Overall - Scope and Scope Exceptions," the Company did not eliminate through consolidation the Company's $619,000 equity investment in AMNB Statutory Trust I or the $264,000 equity investment in the MidCarolina Trusts. Instead, the Company reflected this equity investment in the "Accrued interest receivable and other assets" line item in the consolidated balance sheets. A description of the junior subordinated debt securities outstanding payable to the trusts is shown below as of September 30, 2016 and December 31, 2015 (dollars in thousands): Issuing Entity Date Issued Interest Rate Maturity Date Principal Amount September 30, 2016 December 31, 2015 AMNB Trust I 4/7/2006 Libor plus 1.35% 6/30/2036 $ 20,619 $ 20,619 MidCarolina Trust I 10/29/2002 Libor plus 3.45% 11/7/2032 4,251 4,209 MidCarolina Trust II 12/3/2003 Libor plus 2.95% 10/7/2033 2,828 2,794 $ 27,698 $ 27,622 The principal amounts reflected above for the MidCarolina Trusts are net of fair value adjustments of $1,685,000 and $1,761,000 at September 30, 2016 and December 31, 2015 , respectively. The original fair value adjustments of $1,197,000 and $1,021,000 were recorded as a result of the acquisition of MidCarolina on July 1, 2011, and are being amortized into interest expense over the remaining lives of the respective borrowings.

Stock Based Compensation

Stock Based Compensation	9 Months Ended
	Sep. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Based Compensation	Stock Based Compensation The Company's 2008 Stock Incentive Plan ("2008 Plan") was adopted by the Board of Directors of the Company on February 19, 2008, and approved by shareholders on April 22, 2008, at the Company's 2008 Annual Meeting of Shareholders. The 2008 Plan provides for the granting of restricted stock awards and incentive and non-statutory options to employees and directors on a periodic basis, at the discretion of the Board of Directors or a Board designated committee. The 2008 Plan authorizes the issuance of up to 500,000 shares of common stock. The 2008 Plan replaced the Company's stock option plan that was approved by the shareholders at the 1997 Annual Meeting, which expired in 2006. Stock Options Accounting guidance requires that compensation cost relating to share-based payment transactions be recognized in the financial statements with measurement based upon the fair value of the equity or liability instruments issued. A summary of stock option transactions for the nine months ended September 30, 2016 is as follows: Option Weighted Weighted Aggregate Outstanding at December 31, 2015 67,871 $ 24.47 Acquired in acquisition — — Granted — — Exercised (4,134 ) 24.30 Forfeited — — Expired — — Outstanding at September 30, 2016 63,737 $ 24.48 1.89 years $ 248 Exercisable at September 30, 2016 63,737 $ 24.48 1.89 years $ 248 The fair value of options is estimated at the date of grant using the Black-Scholes option pricing model and expensed over the options' vesting period. No stock options have been granted since 2009. As of September 30, 2016 , there was no unrecognized compensation expenses related to nonvested stock option grants. Restricted Stock The Company from time-to-time grants shares of restricted stock to key employees and non-employee directors. These awards help align the interests of these employees and directors with the interests of the shareholders of the Company by providing economic value directly related to increases in the value of the Company's common stock. The value of the stock awarded is established as the fair value of the stock at the time of the grant. The Company recognizes expense, equal to the total value of such awards, ratably over the vesting period of the stock grants. Restricted stock granted in 2016 cliff vests at the end of a 36 month period beginning on the date of the grant. Nonvested restricted stock activity for the nine months ended September 30, 2016 is summarized in the following table. Restricted Stock Shares Weighted Average Grant Date Value Nonvested at December 31, 2015 41,563 $ 22.15 Granted 25,943 23.07 Vested (19,219 ) 21.47 Forfeited (547 ) 21.98 Nonvested at September 30, 2016 47,740 $ 22.93 As of September 30, 2016 and December 31, 2015 , there was $585,000 and $340,000 , respectively, in unrecognized compensation cost related to nonvested restricted stock granted under the 2008 Plan. The weighted average period over which this cost is expected to be recognized is 1.51 years . The share based compensation expense for nonvested restricted stock was $342,000 and $249,000 during the first nine months of 2016 and 2015 , respectively . Starting in 2010, the Company began offering its outside directors alternatives with respect to director compensation. The regular monthly board retainer can be received in the form of either (a) $1,667 in cash or (b) shares of immediately vested, but restricted stock with a market value of $2,083 . Monthly meeting fees can also be received as $725 per meeting in cash or $900 in immediately vested, but restricted stock. For 2016 , all 13 outside directors have elected to receive stock in lieu of cash for either all or part of their monthly retainer board fees. Only outside directors receive board fees. The Company issued 10,588 and 8,630 shares and recognized share based compensation expense of $281,000 and $195,000 during the first nine months of 2016 and 2015 , respectively. During 2015, 4,158 shares with a market value of $95,000 were issued to a retired director as payment for cumulative deferred director compensation.

Earnings Per Common Share

Earnings Per Common Share	9 Months Ended
	Sep. 30, 2016
Earnings Per Share [Abstract]
Earnings Per Common Share	Earnings Per Common Share The following shows the weighted average number of shares used in computing earnings per common share and the effect on weighted average number of shares of potentially dilutive common stock. Potentially dilutive common stock had no effect on income available to common shareholders. Nonvested restricted shares are included in the computation of basic earnings per share as the holder is entitled to full shareholder benefits during the vesting period including voting rights and sharing in nonforfeitable dividends. The following tables present basic and diluted earnings per share for the three and nine month periods ended September 30, 2016 and 2015 . Three Months Ended September 30, 2016 2015 Shares Per Shares Per Basic earnings per share 8,608,323 $ 0.46 8,668,618 $ 0.47 Effect of dilutive securities - stock options 10,012 — 7,953 — Diluted earnings per share 8,618,335 $ 0.46 8,676,571 $ 0.47 Nine Months Ended September 30, 2016 2015 Shares Per Shares Per Basic earnings per share 8,610,100 $ 1.41 8,698,394 $ 1.20 Effect of dilutive securities - stock options 8,286 — 8,476 — Diluted earnings per share 8,618,386 $ 1.41 8,706,870 $ 1.20 Outstanding stock options on common stock that were not included in computing diluted earnings per share for the nine month periods ended September 30, 2016 and 2015 because their effects were anti-dilutive, averaged 14,205 and 78,127 shares, respectively.

Employee Benefit Plans

Employee Benefit Plans	9 Months Ended
	Sep. 30, 2016
Compensation and Retirement Disclosure [Abstract]
Employee Benefit Plans	Employee Benefit Plans The following information for the nine months ended September 30, 2016 and 2015 pertains to the Company's non-contributory defined benefit pension plan which was frozen in 2009. If lump sum payments exceed the service cost plus interest cost, an additional settlement charge will apply (dollars in thousands): Components of Net Periodic Benefit Cost Nine Months Ended September 30, 2016 2015 Service cost $ — $ — Interest cost 201 148 Expected return on plan assets (288 ) (230 ) Recognized net actuarial loss 389 308 Net periodic cost $ 302 $ 226

Fair Value of Financial Instrum

Fair Value of Financial Instruments	9 Months Ended
	Sep. 30, 2016
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value of Financial Instruments Determination of Fair Value The Company uses fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures. In accordance with the fair value measurements and disclosures topic of FASB ASC 820, the fair value of an instrument is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value is best determined based upon quoted market prices. However, in many instances, there are no quoted market prices for the Company's various instruments. In cases where quoted market prices are not available, fair values are based on estimates using present value or other valuation techniques. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows. Accordingly, the fair value estimates may not be realized in an immediate settlement of the instrument. The fair value guidance provides a consistent definition of fair value, which focuses on exit price in an orderly transaction (that is, not a forced liquidation or distressed sale) between market participants at the measurement date under current market conditions. If there has been a significant decrease in the volume and level of activity for the asset or liability, a change in valuation technique or the use of multiple valuation techniques may be appropriate. In such instances, determining the price at which willing market participants would transact at the measurement date under current market conditions depends on the facts and circumstances and requires the use of significant judgment. The fair value is a reasonable point within the range that is most representative of fair value under current market conditions. Fair Value Hierarchy In accordance with this guidance, the Company groups its financial assets and financial liabilities generally measured at fair value in three levels, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. Level 1 – Valuation is based on quoted prices in active markets for identical assets and liabilities. Level 2 – Valuation is based on observable inputs including quoted prices in active markets for similar assets and liabilities, quoted prices for identical or similar assets and liabilities in less active markets, and model-based valuation techniques for which significant assumptions can be derived primarily from or corroborated by observable data in the market. Level 3 – Valuation is based on model-based techniques that use one or more significant inputs or assumptions that are unobservable in the market. The following describes the valuation techniques used by the Company to measure certain financial assets and financial liabilities recorded at fair value on a recurring basis in the financial statements: Securities available for sale : Securities available for sale are recorded at fair value on a recurring basis. Fair value measurement is based upon quoted market prices, when available (Level 1). If quoted market prices are not available, fair values are measured utilizing independent valuation techniques of identical or similar securities for which significant assumptions are derived primarily from or corroborated by observable market data. Third party vendors compile prices from various sources and may determine the fair value of identical or similar securities by using pricing models that consider observable market data (Level 2). If no observable market data is available, valuations are based upon third party model based techniques (Level 3). The following table presents the balances of financial assets measured at fair value on a recurring basis at the dates indicated (dollars in thousands): Fair Value Measurements at September 30, 2016 Using Balance at September 30, Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Description 2016 Level 1 Level 2 Level 3 Assets: Securities available for sale: Federal agencies and GSEs $ 96,978 $ — $ 96,978 $ — Mortgage-backed and CMOs 80,987 — 80,987 — State and municipal 162,820 — 162,820 — Corporate 8,820 — 8,820 — Equity securities 1,834 — 1,834 — Total $ 351,439 $ — $ 351,439 $ — Fair Value Measurements at December 31, 2015 Using Balance at December 31, Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Description 2015 Level 1 Level 2 Level 3 Assets: Securities available for sale: Federal agencies and GSEs $ 81,452 $ — $ 81,452 $ — Mortgage-backed and CMOs 70,930 — 70,930 — State and municipal 175,891 — 175,891 — Corporate 10,590 — 10,590 — Equity securities 1,486 — — 1,486 Total $ 340,349 $ — $ 338,863 $ 1,486 Fair Value Measurements Using Significant Unobservable Inputs (Level 3) Total Realized / Unrealized Gains Balances as of January 1, 2016 Net Income Other Comprehensive Income Purchases, Sales, Issuances and Settlements, Net Transfer In (Out) of Level 3 Balances as of September 30, 2016 Securities available for sale: Equity $ 1,486 $ — $ 93 $ — $ (1,579 ) $ — The Company's investment in preferred securities, a Level 3 input, was converted into common stock, a Level 1 input, at June 29, 2016. Certain assets are measured at fair value on a nonrecurring basis in accordance with GAAP. Adjustments to the fair value of these assets usually result from the application of lower-of-cost-or-market accounting or write-downs of individual assets. The following describes the valuation techniques used by the Company to measure certain assets recorded at fair value on a nonrecurring basis in the financial statements: Loans held for sale : Loans held for sale are carried at fair value. These loans currently consist of one-to-four family residential loans originated for sale in the secondary market. Fair value is based on the price secondary markets are currently offering for similar loans using observable market data which is not materially different than cost due to the short duration between origination and sale (Level 2). As such, the Company records any fair value adjustments on a nonrecurring basis. No nonrecurring fair value adjustments were recorded on loans held for sale during the nine month period ended September 30, 2016 or the year ended December 31, 2015 . Gains and losses on the sale of loans are recorded within income from mortgage banking on the Consolidated Statements of Income. Impaired loans : Loans are designated as impaired when, in the judgment of management based on current information and events, it is probable that all amounts due according to the contractual terms of the loan agreements will not be collected when due. The measurement of the loss associated with impaired loans can be based on either the observable market price of the loan or the fair value of the collateral. Collateral may be in the form of real estate or business assets including equipment, inventory, and accounts receivable. The vast majority of the Company's collateral is real estate. The value of real estate collateral is determined utilizing a market valuation approach based on an appraisal, of one year or less, conducted by an independent, licensed appraiser using observable market data (Level 2). However, if the collateral is a house or building in the process of construction or if an appraisal of the property is more than one year old and not solely based on observable market comparables or management determines the fair value of the collateral is further impaired below the appraised value, then a Level 3 valuation is considered to measure the fair value. The value of business equipment is based upon an outside appraisal, of one year or less, if deemed significant, or the net book value on the applicable business's financial statements if not considered significant using observable market data. Likewise, values for inventory and accounts receivable collateral are based on financial statement balances or aging reports (Level 3). Impaired loans allocated to the allowance for loan losses are measured at fair value on a nonrecurring basis. Any fair value adjustments are recorded in the period incurred as provision for loan losses on the Consolidated Statements of Income. OREO : Measurement for fair values for OREO are the same as impaired loans. Any fair value adjustments are recorded in the period incurred as a valuation allowance against other real estate owned with the associated expense included in other real estate owned expense, net on the Consolidated Statements of Income. The following table summarizes the Company's assets that were measured at fair value on a nonrecurring basis at the dates indicated (dollars in thousands): Fair Value Measurements at September 30, 2016 Using Balance at September 30, Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Description 2016 Level 1 Level 2 Level 3 Assets: Loans held for sale $ 4,776 $ — $ 4,776 $ — Impaired loans, net of valuation allowance 2,144 — — 2,144 Other real estate owned, net 1,145 — — 1,145 Fair Value Measurements at December 31, 2015 Using Balance at December 31, Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Description 2015 Level 1 Level 2 Level 3 Assets: Loans held for sale $ 3,266 $ — $ 3,266 $ — Impaired loans, net of valuation allowance 2,948 — — 2,948 Other real estate owned, net 2,184 — — 2,184 The following tables summarize the Company's quantitative information about Level 3 fair value measurements at the dates indicated: Quantitative Information About Level 3 Fair Value Measurements at September 30, 2016 Assets Valuation Technique Unobservable Input Weighted Impaired loans Discounted appraised value Selling cost 8 % Other real estate owned, net Discounted appraised value Selling cost 6 % Quantitative Information About Level 3 Fair Value Measurements at December 31, 2015 Assets Valuation Technique Unobservable Input Weighted Securities available for sale Third party model based techniques Stock price in different rate environments 49 % Impaired loans Discounted appraised value Selling cost 6 % Discounted cash flow analysis Market rate for borrower (discount rate) 4 % Other real estate owned, net Discounted appraised value Selling cost 6 % The carrying values and estimated fair values of the Company's financial instruments at September 30, 2016 are as follows (dollars in thousands): Fair Value Measurements at September 30, 2016 Using Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Fair Value Carrying Value Level 1 Level 2 Level 3 Balance Financial Assets: Cash and cash equivalents $ 72,817 $ 72,817 $ — $ — $ 72,817 Securities available for sale 351,439 351,439 — 351,439 Restricted stock 6,006 — 6,006 — 6,006 Loans held for sale 4,776 — 4,776 — 4,776 Loans, net of allowance 1,070,444 — — 1,069,612 1,069,612 Bank owned life insurance 17,998 — 17,998 — 17,998 Accrued interest receivable 4,574 — 4,574 — 4,574 Financial Liabilities: Deposits $ 1,306,008 $ — $ 911,717 $ 395,543 $ 1,307,260 Repurchase agreements 44,090 — 44,090 — 44,090 Other short-term borrowings 15,000 — — 15,000 15,000 Long-term borrowings 9,974 — — 10,228 10,228 Junior subordinated debt 27,698 — — 28,139 28,139 Accrued interest payable 637 — 637 — 637 The carrying values and estimated fair values of the Company's financial instruments at December 31, 2015 are as follows (dollars in thousands): Fair Value Measurements at December 31, 2015 Using Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Fair Value Carrying Value Level 1 Level 2 Level 3 Balance Financial Assets: Cash and cash equivalents $ 95,337 $ 95,337 $ — $ — $ 95,337 Securities available for sale 340,349 — 338,863 1,486 340,349 Restricted stock 5,312 — 5,312 — 5,312 Loans held for sale 3,266 — 3,266 — 3,266 Loans, net of allowance 992,924 — — 994,808 994,808 Bank owned life insurance 17,658 — 17,658 — 17,658 Accrued interest receivable 4,116 — 4,116 — 4,116 Financial Liabilities: Deposits $ 1,262,660 $ — $ 865,350 $ 396,551 $ 1,261,901 Repurchase agreements 40,611 — 40,611 — 40,611 Other borrowings 9,958 — — 10,293 10,293 Junior subordinated debt 27,622 — — 22,940 22,940 Accrued interest payable 655 — 655 — 655 The following methods and assumptions were used by the Company in estimating fair value disclosures for financial instruments: Cash and cash equivalents . The carrying amount is a reasonable estimate of fair value. Securities . Fair values are based on quoted market prices or dealer quotes. Restricted stock. The carrying value of restricted stock approximates fair value based on the redemption provisions of the respective entity. Loans held for sale . The carrying amount is a reasonable estimate of fair value. Loans. For variable-rate loans that reprice frequently and with no significant change in credit risk, fair values are based on carrying values. Fair values for fixed-rate loans are estimated based upon discounted cash flow analysis, using interest rates currently being offered for loans with similar terms to borrowers of similar credit quality. Fair values for nonperforming loans are estimated using discounted cash flow analysis or underlying collateral values, where applicable. Bank owned life insurance. Bank owned life insurance represents insurance policies on officers, directors, and past directors of the Company. The cash values of the policies are estimates using information provided by insurance carriers. These policies are carried at their cash surrender value, which approximates the fair value. Accrued interest receivable . The carrying amount is a reasonable estimate of fair value. Deposits . The fair value of demand deposits, savings deposits, and money market deposits equals the carrying value. The fair value of fixed-rate certificates of deposit is estimated by discounting the future cash flows using the current rates at which similar deposit instruments would be offered to depositors for the same remaining maturities. Repurchase agreements . The carrying amount is a reasonable estimate of fair value. Other short-term borrowings. The fair values of other borrowings are estimated using discounted cash flow analysis based on the interest rates for similar types of borrowing arrangements. Long-term borrowings. The fair values of other borrowings are estimated using discounted cash flow analysis based on the interest rates for similar types of borrowing arrangements. Junior subordinated debt . Fair value is calculated by discounting the future cash flows using the estimated current interest rates at which similar securities would be issued. Accrued interest payable . The carrying amount is a reasonable estimate of fair value. Off-balance sheet instruments . The fair value of letters of credit is based on fees currently charged for similar agreements or on the estimated cost to terminate them or otherwise settle the obligations with the counterparties at the reporting date. At September 30, 2016 and December 31, 2015 , the fair value of off-balance sheet instruments was deemed immaterial, and therefore was not included in the previous table. The Company assumes interest rate risk (the risk that interest rates will change) in its normal operations. As a result, the fair values of the Company's financial instruments will change when interest rates change and that change may be either favorable or unfavorable to the Company.

Segment and Related Information

Segment and Related Information	9 Months Ended
	Sep. 30, 2016
Segment Reporting [Abstract]
Segment and Related Information	Segment and Related Information The Company has two reportable segments, community banking and trust and investment services. Community banking involves making loans to and generating deposits from individuals and businesses. All assets and liabilities of the Company are allocated to community banking. Investment income from securities is also allocated to the community banking segment. Loan fee income, service charges from deposit accounts, and non-deposit fees such as automated teller machine fees and insurance commissions generate additional income for the community banking segment. Trust and investment services include estate planning, trust account administration, investment management, and retail brokerage. Investment management services include purchasing equity, fixed income, and mutual fund investments for customer accounts. The trust and investment services segment receives fees for investment and administrative services. Amounts shown in the "Other" column includes activities of the Company which are primarily debt service on trust preferred securities and corporate items. Segment information as of and for the three and nine months ended September 30, 2016 and 2015 (unaudited), is shown in the following tables (dollars in thousands): Three Months Ended September 30, 2016 Community Trust and Other Intersegment Total Interest income $ 14,040 $ — $ 23 $ — $ 14,063 Interest expense 1,376 — 223 — 1,599 Noninterest income 1,967 1,147 6 — 3,120 Income (loss) before income taxes 5,356 672 (411 ) — 5,617 Net income (loss) 3,760 474 (271 ) — 3,963 Depreciation and amortization 671 2 — — 673 Total assets 1,611,624 — 231,496 (227,586 ) 1,615,534 Goodwill 43,872 — — — 43,872 Capital expenditures 267 — — — 267 Three Months Ended September 30, 2015 Community Trust and Other Intersegment Total Interest income $ 13,527 $ — $ 15 $ — $ 13,542 Interest expense 1,290 — 191 — 1,481 Noninterest income 1,788 1,262 5 — 3,055 Income (loss) before income taxes 5,160 803 (235 ) — 5,728 Net income (loss) 3,626 566 (155 ) — 4,037 Depreciation and amortization 772 3 — — 775 Total assets 1,510,324 — 224,120 (222,007 ) 1,512,437 Goodwill 44,333 — — — 44,333 Capital expenditures 602 — — — 602 Nine Months Ended September 30, 2016 Community Trust and Other Intersegment Total Interest income $ 41,950 $ — $ 53 $ — $ 42,003 Interest expense 4,151 — 644 — 4,795 Noninterest income 6,302 3,465 17 — 9,784 Income (loss) before income taxes 16,538 2,006 (1,193 ) — 17,351 Net income (loss) 11,558 1,408 (787 ) — 12,179 Depreciation and amortization 2,190 8 — — 2,198 Total assets 1,611,624 — 231,496 (227,586 ) 1,615,534 Goodwill 43,872 — — — 43,872 Capital expenditures 536 — — — 536 Nine Months Ended September 30, 2015 Community Trust and Other Intersegment Total Interest income $ 41,173 $ — $ 45 $ — $ 41,218 Interest expense 3,834 — 563 — 4,397 Noninterest income 5,809 3,645 15 — 9,469 Income (loss) before income taxes 13,314 2,026 (827 ) — 14,513 Net income (loss) 9,522 1,456 (546 ) — 10,432 Depreciation and amortization 2,249 9 — — 2,258 Total assets 1,510,324 — 224,120 (222,007 ) 1,512,437 Goodwill 44,333 — — — 44,333 Capital expenditures 1,182 21 — — 1,203

Supplemental Cash Flow Informat

Supplemental Cash Flow Information	9 Months Ended
	Sep. 30, 2016
Supplemental Cash Flow Information [Abstract]
Supplemental Cash Flow Information	Supplemental Cash Flow Information Nine Months Ended 2016 2015 Supplemental Schedule of Cash and Cash Equivalents: Cash and due from banks $ 37,679 $ 19,280 Interest-bearing deposits in other banks 35,138 46,637 Federal funds sold — — Cash and Cash Equivalents $ 72,817 $ 65,917 Supplemental Disclosure of Cash Flow Information: Cash paid for: Interest on deposits and borrowed funds $ 4,813 $ 4,341 Income taxes 5,440 2,950 Noncash investing and financing activities: Transfer of loans to other real estate owned 97 1,094 Unrealized gains (losses) on securities available for sale 720 (582 ) Non-cash transactions related to acquisitions: Assets acquired: Investment securities — 18,800 Restricted stock — 587 Loans — 115,050 Premises and equipment — 1,030 Deferred income taxes — 2,773 Core deposit intangible — 1,839 Other real estate owned — 168 Bank owned life insurance — 1,955 Other assets — 1,077 Liabilities assumed: Deposits — 137,323 Other liabilities — 3,001 Consideration: Issuance of common stock — 20,483

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	9 Months Ended
	Sep. 30, 2016
Equity [Abstract]
Accumulated Other Comprehensive Income	Accumulated Other Comprehensive Income Changes in each component of accumulated other comprehensive income ("AOCI") for the three and nine months ended September 30, 2016 and 2015 (unaudited) were as follows (dollars in thousands): For the Three Months Ended Net Unrealized Gains (Losses) on Securities Adjustments Related to Pension Benefits Accumulated Other Comprehensive Income (Loss) Balance at June 30, 2015 $ 4,583 $ (2,181 ) $ 2,402 Net unrealized gains on securities available for sale, net of tax, $(478) 887 — 887 Reclassification adjustment for gains on sales of securities, net of tax, $3 (3 ) — (3 ) Balance at September 30, 2015 $ 5,467 $ (2,181 ) $ 3,286 Balance at June 30, 2016 $ 5,563 $ (1,832 ) $ 3,731 Net unrealized losses on securities available for sale, net of tax, $499 (925 ) — (925 ) Reclassification adjustment for gains on sales of securities, net of tax, $25 (48 ) — (48 ) Balance at September 30, 2016 $ 4,590 $ (1,832 ) $ 2,758 Nine Months Ended Net Unrealized Gains (Losses) on Securities Adjustments Related to Pension Benefits Accumulated Other Comprehensive Income (Loss) Balance at December 31, 2014 $ 5,845 $ (2,181 ) $ 3,664 Net unrealized losses on securities available for sale, net of tax, $10 (19 ) — (19 ) Reclassification adjustment for gains on sales of securities, net of tax, $194 (359 ) — (359 ) Balance at September 30, 2015 $ 5,467 $ (2,181 ) $ 3,286 Balance at December 31, 2015 $ 4,122 $ (1,832 ) $ 2,290 Net unrealized gains on securities available for sale, net of tax, $(483) 898 — 898 Reclassification adjustment for gains on sales of securities, net of tax, $231 (430 ) — (430 ) Balance at September 30, 2016 $ 4,590 $ (1,832 ) $ 2,758 Reclassifications Out of Accumulated Other Comprehensive Income For the three and nine months ended September 30, 2016 and 2015 (dollars in thousands) For the Three Months Ended September 30, 2016 Amount Reclassified from AOCI Affected Line Item in the Statement of Where Net Income is Presented Details about AOCI Components Available for sale securities: Realized gain on sale of securities $ 73 Securities gains, net (25 ) Income taxes Total reclassifications $ 48 Net of tax For the Three Months Ended September 30, 2015 Amount Reclassified from AOCI Affected Line Item in the Statement of Where Net Income is Presented Details about AOCI Components Available for sale securities: Realized gain on sale of securities $ 6 Securities gains, net (3 ) Income taxes Total reclassifications $ 3 Net of tax For the Nine Months Ended September 30, 2016 Amount Reclassified from AOCI Affected Line Item in the Statement of Where Net Income is Presented Details about AOCI Components Available for sale securities: Realized gain on sale of securities $ 661 Securities gains, net (231 ) Income taxes Total reclassifications $ 430 Net of tax For the Nine Months Ended September 30, 2015 Amount Reclassified from AOCI Affected Line Item in the Statement of Where Net Income is Presented Details about AOCI Components Available for sale securities: Realized gain on sale of securities $ 553 Securities gains, net (194 ) Income taxes Total reclassifications $ 359 Net of tax

Accounting Policies - (Policies

Accounting Policies - (Policies)	9 Months Ended
	Sep. 30, 2016
Accounting Policies [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements In August 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2014-15, "Presentation of Financial Statements - Going Concern (Subtopic 205-40): Disclosure of Uncertainties about an Entity's Ability to Continue as a Going Concern." This update is intended to provide guidance about management's responsibility to evaluate whether there is substantial doubt about an entity's ability to continue as a going concern and to provide related footnote disclosures. Management is required under the new guidance to evaluate whether there are conditions or events, considered in the aggregate, that raise substantial doubt about the entity's ability to continue as a going concern within one year after the date the financial statements are issued when preparing financial statements for each interim and annual reporting period. If conditions or events are identified, the ASU specifies the process that must be followed by management and also clarifies the timing and content of going concern footnote disclosures in order to reduce diversity in practice. The amendments in this ASU are effective for annual periods and interim periods within those annual periods beginning after December 15, 2016. Early adoption is permitted. The Company does not expect the adoption of ASU 2014-15 to have a material impact on its consolidated financial statements. In January 2016, the FASB issued ASU 2016-01, "Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities." The amendments in ASU 2016-01, among other things: (1) requires equity investments (except 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; (2) requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes; (3) Requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset (i.e., securities or loans and receivables); and (4) eliminates the requirement for public business entities to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost. 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. The Company is currently assessing the impact that ASU 2016-01 will have on its consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02, "Leases (Topic 842)." Among other things, in the amendments in ASU 2016-02, lessees will be required to recognize the following for all leases (with the exception of short-term leases) at the commencement date: (1) a lease liability, which is a lessee's obligation to make lease payments arising from a lease, measured on a discounted basis; and (2) a right-of-use asset, which is an asset that represents the lessee's right to use, or control the use of, a specified asset for the lease term. Under the new guidance, lessor accounting is largely unchanged. Certain targeted improvements were made to align, where necessary, lessor accounting with the lessee accounting model and Topic 606, Revenue from Contracts with Customers. The amendments in this ASU are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Early application is permitted upon issuance. Lessees (for capital and operating leases) and lessors (for sales-type, direct financing, and operating leases) must apply a modified retrospective transition approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The modified retrospective approach would not require any transition accounting for leases that expired before the earliest comparative period presented. Lessees and lessors may not apply a full retrospective transition approach. The Company is currently assessing the impact that ASU 2016-02 will have on its consolidated financial statements. During March 2016, the FASB issued ASU No. 2016-05, "Derivatives and Hedging (Topic 815): Effect of Derivative Contract Novations on Existing Hedge Accounting Relationships." The amendments in this ASU clarify that a change in the counterparty to a derivative instrument that has been designated as the hedging instrument does not, in and of itself, require dedesignation of that hedging relationship provided that all other hedge accounting criteria remain intact. The amendments are effective for public business entities for financial statements issued for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. The Company does not expect the adoption of ASU 2016-05 to have a material impact on its consolidated financial statements. In March 2016, the FASB issued ASU No. 2016-07, "Investments - Equity Method and Joint Ventures (Topic 323): Simplifying the Transition to the Equity Method of Accounting." The amendments in this ASU 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. Therefore, upon qualifying for the equity method of accounting, no retroactive adjustment of the investment is required. In addition, the amendments in this ASU 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 increases in the level of ownership interest or degree of influence that result in the adoption of the equity method. Early adoption is permitted. The Company does not expect the adoption of ASU 2016-07 to have a material impact on its consolidated financial statements. During March 2016, the FASB issued ASU No. 2016-09, "Compensation - Stock Compensation (Topic 718): Improvements to Employee Shares-Based Payment Accounting." The amendments in this ASU simplify several aspects of the accounting for share-based payment award transactions including: (1) income tax consequences; (2) classification of awards as either equity or liabilities; and (3) classification on the statement of cash flows. The amendments are effective for public companies for annual periods beginning after December 15, 2016, and interim periods within those annual periods. The Company is currently assessing the impact that ASU 2016-09 will have on its consolidated financial statements. During June 2016, the FASB issued ASU No. 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.” The amendments in this ASU, among other things, require the measurement of all expected credit losses for financial assets held at the reporting date based on historical experience, current conditions, and reasonable and supportable forecasts. Financial institutions and other organizations will now use forward-looking information to better inform their credit loss estimates. Many of the loss estimation techniques applied today will still be permitted, although the inputs to those techniques will change to reflect the full amount of expected credit losses. In addition, the ASU amends the accounting for credit losses on available-for-sale debt securities and purchased financial assets with credit deterioration. The amendments in this ASU are effective for Securities and Exchange Commission ("SEC") filers for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. For public companies that are not SEC filers, the amendments in this ASU are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. The Company is currently assessing the impact that ASU 2016-13 will have on its consolidated financial statements. During August 2016, the FASB issued ASU No. 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments”, to address diversity in how certain cash receipts and cash payments are presented and classified in the statement of cash flows. The amendments are effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. The amendments should be applied using a retrospective transition method to each period presented. If retrospective application is impractical for some of the issues addressed by the update, the amendments for those issues would be applied prospectively as of the earliest date practicable. Early adoption is permitted, including adoption in an interim period. The Company does not expect the adoption of ASU 2016-15 to have a material impact on its consolidated financial statements.

Acquisition of MainStreet Ban26

Acquisition of MainStreet Bankshares, Inc. (Tables)	9 Months Ended
	Sep. 30, 2016
Business Combinations [Abstract]
Schedule of Amortization and Accretion of Premiums and Discounts	The net impact of the amortization and accretion of premiums and discounts associated with the Company's acquisition accounting adjustments related to the MainStreet acquisition had the following impact on the Consolidated Statements of Income during the nine months ended September 30, 2016 and 2015 (dollars in thousands): Nine Months Ended September 30, 2016 September 30, 2015 Acquired performing loans $ 203 $ 317 Acquired impaired loans 445 827 CD valuation — 216 Brokered CD valuation — 2 Amortization of core deposit intangible (185 ) (220 ) Net impact to income before taxes $ 463 $ 1,142

Securities (Tables)

Securities (Tables)	9 Months Ended
	Sep. 30, 2016
Investments, Debt and Equity Securities [Abstract]
Schedule of amortized cost and estimated fair value of investments in debt securities	The amortized cost and fair value of investments in debt and equity securities at September 30, 2016 and December 31, 2015 were as follows (dollars in thousands): September 30, 2016 Amortized Unrealized Unrealized Securities available for sale: Federal agencies and GSEs $ 96,840 $ 225 $ 87 $ 96,978 Mortgage-backed and CMOs 79,631 1,376 20 80,987 State and municipal 157,922 4,924 26 162,820 Corporate 8,697 123 — 8,820 Equity securities 1,288 546 — 1,834 Total securities available for sale $ 344,378 $ 7,194 $ 133 $ 351,439 December 31, 2015 Amortized Unrealized Unrealized Securities available for sale: Federal agencies and GSEs $ 81,601 $ 170 $ 319 $ 81,452 Mortgage-backed and CMOs 70,520 799 389 70,930 State and municipal 170,268 5,659 36 175,891 Corporate 10,619 28 57 10,590 Equity securities 1,000 486 — 1,486 Total securities available for sale $ 334,008 $ 7,142 $ 801 $ 340,349
Cost of restricted stock	The cost of restricted stock at September 30, 2016 and December 31, 2015 was as follows (dollars in thousands): September 30, December 31, FRB stock $ 3,553 $ 3,535 FHLB stock 2,453 1,777 Total restricted stock $ 6,006 $ 5,312
Schedule of fair value and gross unrealized losses by investment category and length of time	The table below shows estimated fair value and gross unrealized losses, aggregated by investment category and length of time that individual securities had been in a continuous unrealized loss position, at December 31, 2015 (dollars in thousands): Total Less than 12 Months 12 Months or More Fair Unrealized Fair Unrealized Fair Unrealized Federal agencies and GSEs $ 57,711 $ 319 $ 57,711 $ 319 $ — $ — Mortgage-backed and CMOs 37,368 389 35,424 346 1,944 43 State and municipal 13,540 36 12,716 34 824 2 Corporate 5,107 57 3,530 29 1,577 28 Total $ 113,726 $ 801 $ 109,381 $ 728 $ 4,345 $ 73 The following table shows estimated fair value and gross unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at September 30, 2016 . The reference point for determining when securities are in an unrealized loss position is month-end. Therefore, it is possible that a security's market value exceeded its amortized cost on other days during the past twelve-month period. Available for sale securities that have been in a continuous unrealized loss position are as follows (dollars in thousands): Total Less than 12 Months 12 Months or More Fair Unrealized Fair Unrealized Fair Unrealized Federal agencies and GSEs $ 35,876 $ 87 $ 35,876 $ 87 $ — $ — Mortgage-backed and CMOs 2,140 20 334 1 1,806 19 State and municipal 8,906 26 8,089 26 817 — Total $ 46,922 $ 133 $ 44,299 $ 114 $ 2,623 $ 19

Loans (Tables)

Loans (Tables)	9 Months Ended
	Sep. 30, 2016
Receivables [Abstract]
Schedule of loans, excluding loans held for sale	Loans, excluding loans held for sale, at September 30, 2016 and December 31, 2015 , were comprised of the following (dollars in thousands): September 30, December 31, 2015 Commercial $ 204,184 $ 177,481 Commercial real estate: Construction and land development 91,688 72,968 Commercial real estate 454,797 430,186 Residential real estate: Residential 218,632 220,434 Home equity 108,617 98,449 Consumer 5,283 6,007 Total loans $ 1,083,201 $ 1,005,525
Schedule stating outstanding principal balance and the carrying amount of loan acquired	The outstanding principal balance and the carrying amount of these loans included in the consolidated balance sheets at September 30, 2016 and December 31, 2015 are as follows (dollars in thousands): September 30, December 31, 2015 Outstanding principal balance $ 112,205 $ 145,380 Carrying amount 103,911 135,254 The outstanding principal balance and related carrying amount of acquired impaired loans, for which the Company applies FASB Accounting Standards Codification ("ASC") 310-30 to account for interest earned, as of the indicated dates are as follows (dollars in thousands): September 30, December 31, 2015 Outstanding principal balance $ 35,697 $ 40,951 Carrying amount 29,739 33,878
Schedule of changes in the accretable yield on acquired impaired loans	The following table presents changes in the accretable yield on acquired impaired loans, for which the Company applies FASB ASC 310-30, at September 30, 2016 and December 31, 2015 (dollars in thousands): September 30, 2016 December 31, 2015 Balance at January 1 $ 7,299 $ 1,440 Additions from merger with MainStreet — 7,140 Accretion (1,079 ) (211 ) Other changes, net 201 (1,070 ) $ 6,421 $ 7,299
Schedule of analysis by portfolio segment of the entity's past due loans	The following table shows an analysis by portfolio segment of the Company's past due loans at September 30, 2016 (dollars in thousands): 30- 59 Days 60-89 Days 90 Days + Non- Total Current Total Commercial $ 13 $ — $ — $ 67 $ 80 $ 204,104 $ 204,184 Commercial real estate: Construction and land development 15 — — 66 81 91,607 91,688 Commercial real estate 129 114 — 905 1,148 453,649 454,797 Residential: Residential 517 73 — 2,073 2,663 215,969 218,632 Home equity 95 34 — 726 855 107,762 108,617 Consumer 2 18 — 9 29 5,254 5,283 Total $ 771 $ 239 $ — $ 3,846 $ 4,856 $ 1,078,345 $ 1,083,201 The following table shows an analysis by portfolio segment of the Company's past due loans at December 31, 2015 (dollars in thousands): 30- 59 Days 60-89 Days 90 Days + Non- Total Current Total Commercial $ 137 $ — $ — $ 90 $ 227 $ 177,254 $ 177,481 Commercial real estate: Construction and land development — — — 258 258 72,710 72,968 Commercial real estate 135 182 — 2,497 2,814 427,372 430,186 Residential: Residential 913 398 — 1,731 3,042 217,392 220,434 Home equity 140 12 — 620 772 97,677 98,449 Consumer 53 1 — 9 63 5,944 6,007 Total $ 1,378 $ 593 $ — $ 5,205 $ 7,176 $ 998,349 $ 1,005,525
Schedule of impaired loan balances by portfolio segment	The following table presents the Company's impaired loan balances by portfolio segment, excluding acquired impaired loans, at September 30, 2016 (dollars in thousands): Recorded Unpaid Related Average Interest With no related allowance recorded: Commercial $ 25 $ 25 $ — $ 9 $ 1 Commercial real estate: Construction and land development 238 238 — 238 13 Commercial real estate 1,837 1,838 — 1,282 76 Residential: Residential 395 405 — 198 20 Home equity 409 602 — 189 16 Consumer 10 10 — 11 1 $ 2,914 $ 3,118 $ — $ 1,927 $ 127 With a related allowance recorded: Commercial * 67 67 — 93 1 Commercial real estate: Construction and land development* 65 66 — 324 10 Commercial real estate* 146 145 — 346 7 Residential Residential 1,563 1,565 21 1,582 16 Home equity 316 317 1 335 2 Consumer* 9 9 — 13 — $ 2,166 $ 2,169 $ 22 $ 2,693 $ 36 Total: Commercial $ 92 $ 92 $ — $ 102 $ 2 Commercial real estate: Construction and land development 303 304 — 562 23 Commercial real estate 1,983 1,983 — 1,628 83 Residential: Residential 1,958 1,970 21 1,780 36 Home equity 725 919 1 524 18 Consumer 19 19 — 24 1 $ 5,080 $ 5,287 $ 22 $ 4,620 $ 163 *Allowance is reported as zero in the table due to presentation in thousands and rounding. The following table presents the Company's impaired loan balances by portfolio segment, excluding acquired impaired loans, at December 31, 2015 (dollars in thousands): Recorded Unpaid Related Average Interest With no related allowance recorded: Commercial $ 4 $ 4 $ — $ 47 $ — Commercial real estate: Construction and land development 205 205 — 220 — Commercial real estate 1,202 1,206 — 1,504 1 Residential: Residential 127 124 — 126 — Home equity 173 173 — 305 — Consumer 13 13 — 14 — $ 1,724 $ 1,725 $ — $ 2,216 $ 1 With a related allowance recorded: Commercial* $ 91 $ 91 $ — $ 99 $ — Commercial real estate: Construction and land development 448 449 6 563 26 Commercial real estate 390 391 3 353 17 Residential: Residential* 1,649 1,690 — 1,034 22 Home equity 397 396 25 327 — Consumer 8 9 1 11 — $ 2,983 $ 3,026 $ 35 $ 2,387 $ 65 Total: Commercial $ 95 $ 95 $ — $ 146 $ — Commercial real estate: Construction and land development 653 654 6 783 26 Commercial real estate 1,592 1,597 3 1,857 18 Residential: Residential 1,776 1,814 — 1,160 22 Home equity 570 569 25 632 — Consumer 21 22 1 25 — $ 4,707 $ 4,751 $ 35 $ 4,603 $ 66 *Allowance is reported as zero in the table due to presentation in thousands and rounding.
Schedule of detail of loans modified as troubled debt restructurings	The following tables show the detail of loans modified as troubled debt restructurings ("TDRs") during the three and nine months ended September 30, 2016 included in the impaired loan balances (dollars in thousands): Loans Modified as a TDR for the Three Months Ended September 30, 2016 Loan Type Number of Contracts Pre-Modification Post-Modification Commercial — $ — $ — Commercial real estate — — — Construction and land development — — — Home Equity — — — Residential real estate 1 56 47 Consumer — — — Total 1 $ 56 $ 47 Loans Modified as a TDR for the Nine Months Ended September 30, 2016 Loan Type Number of Contracts Pre-Modification Post-Modification Commercial 1 $ 24 $ 24 Commercial real estate 2 1,005 1,003 Construction and land development — — — Home Equity — — — Residential real estate 2 58 48 Consumer — — — Total 5 $ 1,087 $ 1,075 The following tables show the detail of loans modified as TDRs during the three and nine months ended September 30, 2015 included in the impaired loan balances (dollars in thousands): Loans Modified as a TDR for the Three Months Ended September 30, 2015 Loan Type Number of Contracts Pre-Modification Post-Modification Commercial 2 $ 52 $ 31 Commercial real estate — — — Construction and land development — — — Home Equity 1 106 106 Residential real estate 1 382 294 Consumer — — — Total 4 $ 540 $ 431 Loans Modified as a TDR for the Nine Months Ended September 30, 2015 Loan Type Number of Contracts Pre-Modification Post-Modification Commercial 2 $ 52 $ 31 Commercial real estate 3 256 249 Construction and land development — — — Home Equity 1 106 106 Residential real estate 5 776 680 Consumer — — — Total 11 $ 1,190 $ 1,066
Schedule of commercial loan portfolio broken down by internal risk grading	The following table shows the Company's loan portfolio broken down by internal risk grading as of September 30, 2016 (dollars in thousands): Commercial and Consumer Credit Exposure Credit Risk Profile by Internally Assigned Grade Commercial Construction and Land Development Commercial Residential Home Pass $ 203,353 $ 88,992 $ 443,317 $ 202,043 $ 106,106 Special Mention 688 792 6,755 11,637 1,373 Substandard 143 1,904 4,725 4,952 1,138 Doubtful — — — — — Total $ 204,184 $ 91,688 $ 454,797 $ 218,632 $ 108,617 Consumer Credit Exposure Credit Risk Profile Based on Payment Activity Consumer Performing $ 5,249 Nonperforming 34 Total $ 5,283 The following table shows the Company's loan portfolio broken down by internal risk grading as of December 31, 2015 (dollars in thousands): Commercial and Consumer Credit Exposure Credit Risk Profile by Internally Assigned Grade Commercial Construction and Land Development Commercial Residential Home Pass $ 175,963 $ 68,853 $ 418,719 $ 200,008 $ 96,142 Special Mention 1,364 1,210 5,860 14,638 1,314 Substandard 154 2,905 5,607 5,788 993 Doubtful — — — — — Total $ 177,481 $ 72,968 $ 430,186 $ 220,434 $ 98,449 Consumer Credit Exposure Credit Risk Profile Based on Payment Activity Consumer Performing $ 5,999 Nonperforming 8 Total $ 6,007

Allowance for Loan Losses and29

Allowance for Loan Losses and Reserve for Unfunded Lending Commitments (Tables)	9 Months Ended
	Sep. 30, 2016
Receivables [Abstract]
Schedule of changes in the allowance for loan losses	Changes in the allowance for loan losses and the reserve for unfunded lending commitments as of the indicated dates and periods are presented below (dollars in thousands): Nine Months Ended Year Ended December 31, Nine Months Ended Allowance for Loan Losses Balance, beginning of period $ 12,601 $ 12,427 $ 12,427 Provision for loan losses 200 950 700 Charge-offs (245 ) (1,200 ) (883 ) Recoveries 201 424 367 Balance, end of period $ 12,757 $ 12,601 $ 12,611 Reserve for Unfunded Lending Commitments Balance, beginning of period $ 184 $ 163 $ 163 Provision for unfunded commitments 11 21 26 Charge-offs — — — Balance, end of period $ 195 $ 184 $ 189 The reserve for unfunded loan commitments is included in other liabilities. The following table presents changes in the Company's allowance for loan losses by portfolio segment and the related loan balance total by segment at and for the nine months ended September 30, 2016 (dollars in thousands): Commercial Commercial Residential Consumer Total Allowance for Loan Losses Balance at December 31, 2015: $ 2,065 $ 6,930 $ 3,546 $ 60 $ 12,601 Charge-offs (40 ) — (63 ) (142 ) (245 ) Recoveries 26 22 56 97 201 Provision for loan losses 164 39 (42 ) 39 200 Balance at September 30, 2016: $ 2,215 $ 6,991 $ 3,497 $ 54 $ 12,757 Balance at September 30, 2016: Allowance for Loan Losses Individually evaluated for impairment $ — $ — $ 22 $ — $ 22 Collectively evaluated for impairment 2,201 6,867 3,249 54 12,371 Acquired impaired loans 14 124 226 — 364 Total $ 2,215 $ 6,991 $ 3,497 $ 54 $ 12,757 Loans Individually evaluated for impairment $ 92 $ 2,286 $ 2,683 $ 19 $ 5,080 Collectively evaluated for impairment 203,588 530,892 308,654 5,248 1,048,382 Acquired impaired loans 504 13,307 15,912 16 29,739 Total $ 204,184 $ 546,485 $ 327,249 $ 5,283 $ 1,083,201 The following table presents changes in the Company's allowance for loan losses by portfolio segment and the related loan balance total by segment at and for the year ended December 31, 2015 (dollars in thousands): Commercial Commercial Residential Consumer Total Allowance for Loan Losses Balance at December 31, 2014: $ 1,818 $ 6,814 $ 3,715 $ 80 $ 12,427 Charge-offs (175 ) (482 ) (323 ) (220 ) (1,200 ) Recoveries 32 124 139 129 424 Provision for loan losses 390 474 15 71 950 Balance at December 31, 2015: $ 2,065 $ 6,930 $ 3,546 $ 60 $ 12,601 Balance at December 31, 2015: Allowance for Loan Losses Individually evaluated for impairment $ — $ 9 $ 26 $ — $ 35 Collectively evaluated for impairment 2,065 6,750 3,284 60 12,159 Acquired impaired loans — 171 236 — 407 Total $ 2,065 $ 6,930 $ 3,546 $ 60 $ 12,601 Loans Individually evaluated for impairment $ 95 $ 2,245 $ 2,346 $ 21 $ 4,707 Collectively evaluated for impairment 176,798 487,177 297,281 5,684 966,940 Acquired impaired loans 588 13,732 19,256 302 33,878 Total $ 177,481 $ 503,154 $ 318,883 $ 6,007 $ 1,005,525

Goodwill and Other Intangible30

Goodwill and Other Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of changes in carrying amount of goodwill and intangibles	The changes in the carrying amount of goodwill and intangibles for the nine months ended September 30, 2016 , are as follows (dollars in thousands): Goodwill Intangibles Balance at December 31, 2015 $ 43,872 $ 2,683 Additions — — Amortization — (789 ) Impairment — — Balance at September 30, 2016 $ 43,872 $ 1,894

Short-term Borrowings (Tables)

Short-term Borrowings (Tables)	9 Months Ended
	Sep. 30, 2016
Debt Disclosure [Abstract]
Schedule of short-term borrowings	Short-term borrowings consisted of the following at September 30, 2016 and December 31, 2015 (dollars in thousands): September 30, 2016 December 31, 2015 Customer repurchase agreements $ 44,090 $ 40,611 Other short-term borrowings 15,000 — $ 59,090 $ 40,611

Long-term Borrowings (Tables)

Long-term Borrowings (Tables)	9 Months Ended
	Sep. 30, 2016
Debt Disclosure [Abstract]
Schedule of long-term borrowings	Long-term borrowings consisted of the following fixed rate, long-term advances as of September 30, 2016 and December 31, 2015 (dollars in thousands): September 30, 2016 December 31, 2015 Due by Advance Amount Weighted Due by Advance Amount Weighted November 30, 2017 $ 9,974 2.98 % November 30, 2017 $ 9,958 2.98 %

Junior Subordinated Debt (Table

Junior Subordinated Debt (Tables)	9 Months Ended
	Sep. 30, 2016
Trust Preferred Capital Notes [Abstract]
Schedule of junior subordinated debt securities outstanding payable	A description of the junior subordinated debt securities outstanding payable to the trusts is shown below as of September 30, 2016 and December 31, 2015 (dollars in thousands): Issuing Entity Date Issued Interest Rate Maturity Date Principal Amount September 30, 2016 December 31, 2015 AMNB Trust I 4/7/2006 Libor plus 1.35% 6/30/2036 $ 20,619 $ 20,619 MidCarolina Trust I 10/29/2002 Libor plus 3.45% 11/7/2032 4,251 4,209 MidCarolina Trust II 12/3/2003 Libor plus 2.95% 10/7/2033 2,828 2,794 $ 27,698 $ 27,622

Stock Based Compensation (Table

Stock Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of summary of stock option transactions	A summary of stock option transactions for the nine months ended September 30, 2016 is as follows: Option Weighted Weighted Aggregate Outstanding at December 31, 2015 67,871 $ 24.47 Acquired in acquisition — — Granted — — Exercised (4,134 ) 24.30 Forfeited — — Expired — — Outstanding at September 30, 2016 63,737 $ 24.48 1.89 years $ 248 Exercisable at September 30, 2016 63,737 $ 24.48 1.89 years $ 248
Schedule of nonvested restricted stock activity	Nonvested restricted stock activity for the nine months ended September 30, 2016 is summarized in the following table. Restricted Stock Shares Weighted Average Grant Date Value Nonvested at December 31, 2015 41,563 $ 22.15 Granted 25,943 23.07 Vested (19,219 ) 21.47 Forfeited (547 ) 21.98 Nonvested at September 30, 2016 47,740 $ 22.93

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	9 Months Ended
	Sep. 30, 2016
Earnings Per Share [Abstract]
Schedule of basic and diluted earnings per share	The following tables present basic and diluted earnings per share for the three and nine month periods ended September 30, 2016 and 2015 . Three Months Ended September 30, 2016 2015 Shares Per Shares Per Basic earnings per share 8,608,323 $ 0.46 8,668,618 $ 0.47 Effect of dilutive securities - stock options 10,012 — 7,953 — Diluted earnings per share 8,618,335 $ 0.46 8,676,571 $ 0.47 Nine Months Ended September 30, 2016 2015 Shares Per Shares Per Basic earnings per share 8,610,100 $ 1.41 8,698,394 $ 1.20 Effect of dilutive securities - stock options 8,286 — 8,476 — Diluted earnings per share 8,618,386 $ 1.41 8,706,870 $ 1.20

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2016
Compensation and Retirement Disclosure [Abstract]
Schedule of components of net periodic benefit cost	The following information for the nine months ended September 30, 2016 and 2015 pertains to the Company's non-contributory defined benefit pension plan which was frozen in 2009. If lump sum payments exceed the service cost plus interest cost, an additional settlement charge will apply (dollars in thousands): Components of Net Periodic Benefit Cost Nine Months Ended September 30, 2016 2015 Service cost $ — $ — Interest cost 201 148 Expected return on plan assets (288 ) (230 ) Recognized net actuarial loss 389 308 Net periodic cost $ 302 $ 226

Fair Value of Financial Instr37

Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2016
Fair Value Disclosures [Abstract]
Schedule of fair value assets and liabilities measured on recurring basis	The following table presents the balances of financial assets measured at fair value on a recurring basis at the dates indicated (dollars in thousands): Fair Value Measurements at September 30, 2016 Using Balance at September 30, Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Description 2016 Level 1 Level 2 Level 3 Assets: Securities available for sale: Federal agencies and GSEs $ 96,978 $ — $ 96,978 $ — Mortgage-backed and CMOs 80,987 — 80,987 — State and municipal 162,820 — 162,820 — Corporate 8,820 — 8,820 — Equity securities 1,834 — 1,834 — Total $ 351,439 $ — $ 351,439 $ — Fair Value Measurements at December 31, 2015 Using Balance at December 31, Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Description 2015 Level 1 Level 2 Level 3 Assets: Securities available for sale: Federal agencies and GSEs $ 81,452 $ — $ 81,452 $ — Mortgage-backed and CMOs 70,930 — 70,930 — State and municipal 175,891 — 175,891 — Corporate 10,590 — 10,590 — Equity securities 1,486 — — 1,486 Total $ 340,349 $ — $ 338,863 $ 1,486
Schedule of fair value measurements using significant unobservable inputs (Level 3)	Fair Value Measurements Using Significant Unobservable Inputs (Level 3) Total Realized / Unrealized Gains Balances as of January 1, 2016 Net Income Other Comprehensive Income Purchases, Sales, Issuances and Settlements, Net Transfer In (Out) of Level 3 Balances as of September 30, 2016 Securities available for sale: Equity $ 1,486 $ — $ 93 $ — $ (1,579 ) $ —
Schedule of assets that were measured at fair value on a nonrecurring basis	The following table summarizes the Company's assets that were measured at fair value on a nonrecurring basis at the dates indicated (dollars in thousands): Fair Value Measurements at September 30, 2016 Using Balance at September 30, Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Description 2016 Level 1 Level 2 Level 3 Assets: Loans held for sale $ 4,776 $ — $ 4,776 $ — Impaired loans, net of valuation allowance 2,144 — — 2,144 Other real estate owned, net 1,145 — — 1,145 Fair Value Measurements at December 31, 2015 Using Balance at December 31, Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Description 2015 Level 1 Level 2 Level 3 Assets: Loans held for sale $ 3,266 $ — $ 3,266 $ — Impaired loans, net of valuation allowance 2,948 — — 2,948 Other real estate owned, net 2,184 — — 2,184
Schedule of quantitative information of assets measured at Level 3	The following tables summarize the Company's quantitative information about Level 3 fair value measurements at the dates indicated: Quantitative Information About Level 3 Fair Value Measurements at September 30, 2016 Assets Valuation Technique Unobservable Input Weighted Impaired loans Discounted appraised value Selling cost 8 % Other real estate owned, net Discounted appraised value Selling cost 6 % Quantitative Information About Level 3 Fair Value Measurements at December 31, 2015 Assets Valuation Technique Unobservable Input Weighted Securities available for sale Third party model based techniques Stock price in different rate environments 49 % Impaired loans Discounted appraised value Selling cost 6 % Discounted cash flow analysis Market rate for borrower (discount rate) 4 % Other real estate owned, net Discounted appraised value Selling cost 6 %
Schedule of carrying values and estimated fair values of the entity's financial instruments	The carrying values and estimated fair values of the Company's financial instruments at September 30, 2016 are as follows (dollars in thousands): Fair Value Measurements at September 30, 2016 Using Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Fair Value Carrying Value Level 1 Level 2 Level 3 Balance Financial Assets: Cash and cash equivalents $ 72,817 $ 72,817 $ — $ — $ 72,817 Securities available for sale 351,439 351,439 — 351,439 Restricted stock 6,006 — 6,006 — 6,006 Loans held for sale 4,776 — 4,776 — 4,776 Loans, net of allowance 1,070,444 — — 1,069,612 1,069,612 Bank owned life insurance 17,998 — 17,998 — 17,998 Accrued interest receivable 4,574 — 4,574 — 4,574 Financial Liabilities: Deposits $ 1,306,008 $ — $ 911,717 $ 395,543 $ 1,307,260 Repurchase agreements 44,090 — 44,090 — 44,090 Other short-term borrowings 15,000 — — 15,000 15,000 Long-term borrowings 9,974 — — 10,228 10,228 Junior subordinated debt 27,698 — — 28,139 28,139 Accrued interest payable 637 — 637 — 637 The carrying values and estimated fair values of the Company's financial instruments at December 31, 2015 are as follows (dollars in thousands): Fair Value Measurements at December 31, 2015 Using Quoted Prices in Active Markets for Identical Assets Significant Other Observable Inputs Significant Unobservable Inputs Fair Value Carrying Value Level 1 Level 2 Level 3 Balance Financial Assets: Cash and cash equivalents $ 95,337 $ 95,337 $ — $ — $ 95,337 Securities available for sale 340,349 — 338,863 1,486 340,349 Restricted stock 5,312 — 5,312 — 5,312 Loans held for sale 3,266 — 3,266 — 3,266 Loans, net of allowance 992,924 — — 994,808 994,808 Bank owned life insurance 17,658 — 17,658 — 17,658 Accrued interest receivable 4,116 — 4,116 — 4,116 Financial Liabilities: Deposits $ 1,262,660 $ — $ 865,350 $ 396,551 $ 1,261,901 Repurchase agreements 40,611 — 40,611 — 40,611 Other borrowings 9,958 — — 10,293 10,293 Junior subordinated debt 27,622 — — 22,940 22,940 Accrued interest payable 655 — 655 — 655

Segment and Related Informati38

Segment and Related Information (Tables)	9 Months Ended
	Sep. 30, 2016
Segment Reporting [Abstract]
Schedule of segment information	Segment information as of and for the three and nine months ended September 30, 2016 and 2015 (unaudited), is shown in the following tables (dollars in thousands): Three Months Ended September 30, 2016 Community Trust and Other Intersegment Total Interest income $ 14,040 $ — $ 23 $ — $ 14,063 Interest expense 1,376 — 223 — 1,599 Noninterest income 1,967 1,147 6 — 3,120 Income (loss) before income taxes 5,356 672 (411 ) — 5,617 Net income (loss) 3,760 474 (271 ) — 3,963 Depreciation and amortization 671 2 — — 673 Total assets 1,611,624 — 231,496 (227,586 ) 1,615,534 Goodwill 43,872 — — — 43,872 Capital expenditures 267 — — — 267 Three Months Ended September 30, 2015 Community Trust and Other Intersegment Total Interest income $ 13,527 $ — $ 15 $ — $ 13,542 Interest expense 1,290 — 191 — 1,481 Noninterest income 1,788 1,262 5 — 3,055 Income (loss) before income taxes 5,160 803 (235 ) — 5,728 Net income (loss) 3,626 566 (155 ) — 4,037 Depreciation and amortization 772 3 — — 775 Total assets 1,510,324 — 224,120 (222,007 ) 1,512,437 Goodwill 44,333 — — — 44,333 Capital expenditures 602 — — — 602 Nine Months Ended September 30, 2016 Community Trust and Other Intersegment Total Interest income $ 41,950 $ — $ 53 $ — $ 42,003 Interest expense 4,151 — 644 — 4,795 Noninterest income 6,302 3,465 17 — 9,784 Income (loss) before income taxes 16,538 2,006 (1,193 ) — 17,351 Net income (loss) 11,558 1,408 (787 ) — 12,179 Depreciation and amortization 2,190 8 — — 2,198 Total assets 1,611,624 — 231,496 (227,586 ) 1,615,534 Goodwill 43,872 — — — 43,872 Capital expenditures 536 — — — 536 Nine Months Ended September 30, 2015 Community Trust and Other Intersegment Total Interest income $ 41,173 $ — $ 45 $ — $ 41,218 Interest expense 3,834 — 563 — 4,397 Noninterest income 5,809 3,645 15 — 9,469 Income (loss) before income taxes 13,314 2,026 (827 ) — 14,513 Net income (loss) 9,522 1,456 (546 ) — 10,432 Depreciation and amortization 2,249 9 — — 2,258 Total assets 1,510,324 — 224,120 (222,007 ) 1,512,437 Goodwill 44,333 — — — 44,333 Capital expenditures 1,182 21 — — 1,203

Supplemental Cash Flow Inform39

Supplemental Cash Flow Information (Tables)	9 Months Ended
	Sep. 30, 2016
Supplemental Cash Flow Information [Abstract]
Schedule of supplemental disclosure of cash flow information	Nine Months Ended 2016 2015 Supplemental Schedule of Cash and Cash Equivalents: Cash and due from banks $ 37,679 $ 19,280 Interest-bearing deposits in other banks 35,138 46,637 Federal funds sold — — Cash and Cash Equivalents $ 72,817 $ 65,917 Supplemental Disclosure of Cash Flow Information: Cash paid for: Interest on deposits and borrowed funds $ 4,813 $ 4,341 Income taxes 5,440 2,950 Noncash investing and financing activities: Transfer of loans to other real estate owned 97 1,094 Unrealized gains (losses) on securities available for sale 720 (582 ) Non-cash transactions related to acquisitions: Assets acquired: Investment securities — 18,800 Restricted stock — 587 Loans — 115,050 Premises and equipment — 1,030 Deferred income taxes — 2,773 Core deposit intangible — 1,839 Other real estate owned — 168 Bank owned life insurance — 1,955 Other assets — 1,077 Liabilities assumed: Deposits — 137,323 Other liabilities — 3,001 Consideration: Issuance of common stock — 20,483

Accumulated Other Comprehensi40

Accumulated Other Comprehensive Income (Tables)	9 Months Ended
	Sep. 30, 2016
Equity [Abstract]
Components of accumulated other comprehensive income (loss)	Changes in each component of accumulated other comprehensive income ("AOCI") for the three and nine months ended September 30, 2016 and 2015 (unaudited) were as follows (dollars in thousands): For the Three Months Ended Net Unrealized Gains (Losses) on Securities Adjustments Related to Pension Benefits Accumulated Other Comprehensive Income (Loss) Balance at June 30, 2015 $ 4,583 $ (2,181 ) $ 2,402 Net unrealized gains on securities available for sale, net of tax, $(478) 887 — 887 Reclassification adjustment for gains on sales of securities, net of tax, $3 (3 ) — (3 ) Balance at September 30, 2015 $ 5,467 $ (2,181 ) $ 3,286 Balance at June 30, 2016 $ 5,563 $ (1,832 ) $ 3,731 Net unrealized losses on securities available for sale, net of tax, $499 (925 ) — (925 ) Reclassification adjustment for gains on sales of securities, net of tax, $25 (48 ) — (48 ) Balance at September 30, 2016 $ 4,590 $ (1,832 ) $ 2,758 Nine Months Ended Net Unrealized Gains (Losses) on Securities Adjustments Related to Pension Benefits Accumulated Other Comprehensive Income (Loss) Balance at December 31, 2014 $ 5,845 $ (2,181 ) $ 3,664 Net unrealized losses on securities available for sale, net of tax, $10 (19 ) — (19 ) Reclassification adjustment for gains on sales of securities, net of tax, $194 (359 ) — (359 ) Balance at September 30, 2015 $ 5,467 $ (2,181 ) $ 3,286 Balance at December 31, 2015 $ 4,122 $ (1,832 ) $ 2,290 Net unrealized gains on securities available for sale, net of tax, $(483) 898 — 898 Reclassification adjustment for gains on sales of securities, net of tax, $231 (430 ) — (430 ) Balance at September 30, 2016 $ 4,590 $ (1,832 ) $ 2,758
Reclassifications out of accumulated other comprehensive income	Reclassifications Out of Accumulated Other Comprehensive Income For the three and nine months ended September 30, 2016 and 2015 (dollars in thousands) For the Three Months Ended September 30, 2016 Amount Reclassified from AOCI Affected Line Item in the Statement of Where Net Income is Presented Details about AOCI Components Available for sale securities: Realized gain on sale of securities $ 73 Securities gains, net (25 ) Income taxes Total reclassifications $ 48 Net of tax For the Three Months Ended September 30, 2015 Amount Reclassified from AOCI Affected Line Item in the Statement of Where Net Income is Presented Details about AOCI Components Available for sale securities: Realized gain on sale of securities $ 6 Securities gains, net (3 ) Income taxes Total reclassifications $ 3 Net of tax For the Nine Months Ended September 30, 2016 Amount Reclassified from AOCI Affected Line Item in the Statement of Where Net Income is Presented Details about AOCI Components Available for sale securities: Realized gain on sale of securities $ 661 Securities gains, net (231 ) Income taxes Total reclassifications $ 430 Net of tax For the Nine Months Ended September 30, 2015 Amount Reclassified from AOCI Affected Line Item in the Statement of Where Net Income is Presented Details about AOCI Components Available for sale securities: Realized gain on sale of securities $ 553 Securities gains, net (194 ) Income taxes Total reclassifications $ 359 Net of tax

Acquisition of MainStreet Ban41

Acquisition of MainStreet Bankshares, Inc. - (Details)	Jan. 01, 2015USD ($)bank$ / sharesshares	Sep. 30, 2016USD ($)shares	Sep. 30, 2015USD ($)	Dec. 31, 2015USD ($)	[1]
Business Acquisition [Line Items]
Number of shares granted in conjunction with the acquisition (in shares) | shares		0
Net loans		$ 1,070,444,000		$ 992,924,000
Assets		1,615,534,000	$ 1,512,437,000	1,547,599,000
Deposits		1,306,008,000		$ 1,262,660,000
MainStreet BankShares, Inc. [Member]
Business Acquisition [Line Items]
Net loans	$ 122,000,000
Assets	164,000,000
Deposits	$ 137,000,000
Franklin Community Bank, N.A. [Member] | Virginia [Member]
Business Acquisition [Line Items]
Number of banking offices served (banks) | bank	3
MainStreet BankShares, Inc. [Member]
Business Acquisition [Line Items]
Shares received by acquiree entity in exchange of acquirer entity's common stock (in dollars per share) | $ / shares	$ 3.46
Shares received by acquiree entity in exchange of acquirer entity's common stock (in shares) | shares	0.482
Share exchange ratio on acquisitions	0.643
Cash dividends received for purchase of acquisition	$ 6,000,000
Amount of loan taken to fund merger	$ 0
Number of shares granted in conjunction with the acquisition (in shares) | shares	43,086
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments [Abstract]
Net impact to income before taxes		463,000	1,142,000
MainStreet BankShares, Inc. [Member] | Amortization of intangible asset [Member]
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments [Abstract]
Intangibles		(185,000)	(220,000)
MainStreet BankShares, Inc. [Member] | CD [Member] | Interest on deposits [Member]
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments [Abstract]
Financial assets		0	216,000
MainStreet BankShares, Inc. [Member] | Brokered CD [Member] | Interest on deposits [Member]
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments [Abstract]
Financial assets		0	2,000
MainStreet BankShares, Inc. [Member] | Acquired Impaired Loans [Member] | Interest and fees on loans [Member]
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments [Abstract]
Financial assets		445,000	827,000
MainStreet BankShares, Inc. [Member] | Performing [Member] | Interest and fees on loans [Member]
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments [Abstract]
Financial assets		$ 203,000	$ 317,000
[1]	Derived from audited consolidated financial statements.

Securities - Schedule of Amort

Securities - Schedule of Amortized Cost and Fair Value of Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Securities available for sale:
Amortized Cost	$ 344,378	$ 334,008
Unrealized Gains	7,194	7,142
Unrealized Losses	133	801
Securities available for sale	351,439	340,349	[1]
Federal agencies and GSEs [Member]
Securities available for sale:
Amortized Cost	96,840	81,601
Unrealized Gains	225	170
Unrealized Losses	87	319
Securities available for sale	96,978	81,452
Mortgage-backed and CMOs [Member]
Securities available for sale:
Amortized Cost	79,631	70,520
Unrealized Gains	1,376	799
Unrealized Losses	20	389
Securities available for sale	80,987	70,930
State and municipal [Member]
Securities available for sale:
Amortized Cost	157,922	170,268
Unrealized Gains	4,924	5,659
Unrealized Losses	26	36
Securities available for sale	162,820	175,891
Corporate [Member]
Securities available for sale:
Amortized Cost	8,697	10,619
Unrealized Gains	123	28
Unrealized Losses	0	57
Securities available for sale	8,820	10,590
Equity securities [Member]
Securities available for sale:
Amortized Cost	1,288	1,000
Unrealized Gains	546	486
Unrealized Losses	0	0
Securities available for sale	$ 1,834	$ 1,486
[1]	Derived from audited consolidated financial statements.

Securities - Narrative (Detail

Securities - Narrative (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2016USD ($)Investment	Dec. 31, 2015USD ($)
Investments, Debt and Equity Securities [Abstract]
Par value of restricted stock out of outstanding capital required by FRB	3.00%
Percentage restricted stock outstanding capital subject to call	3.00%
Par value of restricted stock out of outstanding borrowings required by FHLB	4.50%
Schedule of Available-for-sale Securities [Line Items]
Other-than-temporary impairment losses recognized | $	$ 0	$ 0
Federal agencies and GSEs [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of securities with unrealized losses	8
Mortgage-backed and CMOs [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of securities with unrealized losses	6
State and municipal [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of securities with unrealized losses	13
Corporate [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of securities with unrealized losses	0

Securities - Cost of Restricte

Securities - Cost of Restricted Stock (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Schedule of Investments [Line Items]
Total restricted stock	$ 6,006	$ 5,312	[1]
FRB Stock [Member]
Schedule of Investments [Line Items]
Total restricted stock	3,553	3,535
FHLB Stock [Member]
Schedule of Investments [Line Items]
Total restricted stock	$ 2,453	$ 1,777
[1]	Derived from audited consolidated financial statements.

Securities - Fair Value and Gr

Securities - Fair Value and Gross Unrealized Losses by Investment Category and Length of Time (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Available-for-sale Securities, Total Fair Value	$ 46,922	$ 113,726
Available-for-sale Securities, Fair Value Less than 12 Months	44,299	109,381
Available-for-sale Securities, Fair Value 12 Months or More	2,623	4,345
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Available-for-sale Securities, Total Unrealized Loss	133	801
Available-for-sale Securities, Unrealized Loss Less than 12 Months	114	728
Available-for-sale Securities, Unrealized Loss 12 Months or Longer	19	73
Federal agencies and GSEs [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Available-for-sale Securities, Total Fair Value	35,876	57,711
Available-for-sale Securities, Fair Value Less than 12 Months	35,876	57,711
Available-for-sale Securities, Fair Value 12 Months or More	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Available-for-sale Securities, Total Unrealized Loss	87	319
Available-for-sale Securities, Unrealized Loss Less than 12 Months	87	319
Available-for-sale Securities, Unrealized Loss 12 Months or Longer	0	0
Mortgage-backed and CMOs [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Available-for-sale Securities, Total Fair Value	2,140	37,368
Available-for-sale Securities, Fair Value Less than 12 Months	334	35,424
Available-for-sale Securities, Fair Value 12 Months or More	1,806	1,944
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Available-for-sale Securities, Total Unrealized Loss	20	389
Available-for-sale Securities, Unrealized Loss Less than 12 Months	1	346
Available-for-sale Securities, Unrealized Loss 12 Months or Longer	19	43
State and municipal [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Available-for-sale Securities, Total Fair Value	8,906	13,540
Available-for-sale Securities, Fair Value Less than 12 Months	8,089	12,716
Available-for-sale Securities, Fair Value 12 Months or More	817	824
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Available-for-sale Securities, Total Unrealized Loss	26	36
Available-for-sale Securities, Unrealized Loss Less than 12 Months	26	34
Available-for-sale Securities, Unrealized Loss 12 Months or Longer	$ 0	2
Corporate [Member]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]
Available-for-sale Securities, Total Fair Value		5,107
Available-for-sale Securities, Fair Value Less than 12 Months		3,530
Available-for-sale Securities, Fair Value 12 Months or More		1,577
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract]
Available-for-sale Securities, Total Unrealized Loss		57
Available-for-sale Securities, Unrealized Loss Less than 12 Months		29
Available-for-sale Securities, Unrealized Loss 12 Months or Longer		$ 28

Loans - Schedule of Loans Excl

Loans - Schedule of Loans Excluding Loans Held for Sale (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 1,083,201	$ 1,005,525	[1]
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	204,184	177,481
Commercial real estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	546,485	503,154
Commercial real estate [Member] | Construction and land development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	91,688	72,968
Commercial real estate [Member] | Real estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	454,797	430,186
Residential [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	327,249	318,883
Residential [Member] | Real estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	218,632	220,434
Residential [Member] | Home equity [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	108,617	98,449
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 5,283	$ 6,007
[1]	Derived from audited consolidated financial statements.

Loans - Outstanding Principal

Loans - Outstanding Principal and Carrying Amount of Acquired Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Outstanding principal balance and the carrying amount of loan acquired [Abstract]
Outstanding principal balance	$ 112,205	$ 145,380
Carrying amount	103,911	135,254
Outstanding principal balance and the carrying amount of loan acquired, impaired [Abstract]
Outstanding principal balance	35,697	40,951
Carrying amount	$ 29,739	$ 33,878

Loans - Accretable Yield on Ac

Loans - Accretable Yield on Acquired Impaired Loans (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Changes in the accretable discount on acquired loans [Abstract]
Beginning balance	$ 7,299	$ 1,440
Additions from merger with MainStreet	0	7,140
Accretion	(1,079)	(211)
Other changes, net	201	(1,070)
Ending balance	$ 6,421	$ 7,299

Loans - Past Due (Details)

Loans - Past Due (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Analysis by portfolio segment of the entity's past due loans [Abstract]
Total Past Due	$ 4,856	$ 7,176
90 Days Plus Past Due and Still Accruing	0	0
Non- Accrual Loans	3,846	5,205
Current	1,078,345	998,349
Total Loans	1,083,201	1,005,525	[1]
Commercial [Member]
Analysis by portfolio segment of the entity's past due loans [Abstract]
Total Past Due	80	227
90 Days Plus Past Due and Still Accruing	0	0
Non- Accrual Loans	67	90
Current	204,104	177,254
Total Loans	204,184	177,481
Commercial real estate [Member]
Analysis by portfolio segment of the entity's past due loans [Abstract]
Total Loans	546,485	503,154
Commercial real estate [Member] | Construction and land development [Member]
Analysis by portfolio segment of the entity's past due loans [Abstract]
Total Past Due	81	258
90 Days Plus Past Due and Still Accruing	0	0
Non- Accrual Loans	66	258
Current	91,607	72,710
Total Loans	91,688	72,968
Commercial real estate [Member] | Real estate [Member]
Analysis by portfolio segment of the entity's past due loans [Abstract]
Total Past Due	1,148	2,814
90 Days Plus Past Due and Still Accruing	0	0
Non- Accrual Loans	905	2,497
Current	453,649	427,372
Total Loans	454,797	430,186
Residential [Member]
Analysis by portfolio segment of the entity's past due loans [Abstract]
Total Loans	327,249	318,883
Residential [Member] | Real estate [Member]
Analysis by portfolio segment of the entity's past due loans [Abstract]
Total Past Due	2,663	3,042
90 Days Plus Past Due and Still Accruing	0	0
Non- Accrual Loans	2,073	1,731
Current	215,969	217,392
Total Loans	218,632	220,434
Residential [Member] | Home equity [Member]
Analysis by portfolio segment of the entity's past due loans [Abstract]
Total Past Due	855	772
90 Days Plus Past Due and Still Accruing	0	0
Non- Accrual Loans	726	620
Current	107,762	97,677
Total Loans	108,617	98,449
Consumer [Member]
Analysis by portfolio segment of the entity's past due loans [Abstract]
Total Past Due	29	63
90 Days Plus Past Due and Still Accruing	0	0
Non- Accrual Loans	9	9
Current	5,254	5,944
Total Loans	5,283	6,007
30 to 59 Days Past Due [Member]
Analysis by portfolio segment of the entity's past due loans [Abstract]
Total Past Due	771	1,378
30 to 59 Days Past Due [Member] | Commercial [Member]
Analysis by portfolio segment of the entity's past due loans [Abstract]
Total Past Due	13	137
30 to 59 Days Past Due [Member] | Commercial real estate [Member] | Construction and land development [Member]
Analysis by portfolio segment of the entity's past due loans [Abstract]
Total Past Due	15	0
30 to 59 Days Past Due [Member] | Commercial real estate [Member] | Real estate [Member]
Analysis by portfolio segment of the entity's past due loans [Abstract]
Total Past Due	129	135
30 to 59 Days Past Due [Member] | Residential [Member] | Real estate [Member]
Analysis by portfolio segment of the entity's past due loans [Abstract]
Total Past Due	517	913
30 to 59 Days Past Due [Member] | Residential [Member] | Home equity [Member]
Analysis by portfolio segment of the entity's past due loans [Abstract]
Total Past Due	95	140
30 to 59 Days Past Due [Member] | Consumer [Member]
Analysis by portfolio segment of the entity's past due loans [Abstract]
Total Past Due	2	53
60 to 89 Days Past Due [Member]
Analysis by portfolio segment of the entity's past due loans [Abstract]
Total Past Due	239	593
60 to 89 Days Past Due [Member] | Commercial [Member]
Analysis by portfolio segment of the entity's past due loans [Abstract]
Total Past Due	0	0
60 to 89 Days Past Due [Member] | Commercial real estate [Member] | Construction and land development [Member]
Analysis by portfolio segment of the entity's past due loans [Abstract]
Total Past Due	0	0
60 to 89 Days Past Due [Member] | Commercial real estate [Member] | Real estate [Member]
Analysis by portfolio segment of the entity's past due loans [Abstract]
Total Past Due	114	182
60 to 89 Days Past Due [Member] | Residential [Member] | Real estate [Member]
Analysis by portfolio segment of the entity's past due loans [Abstract]
Total Past Due	73	398
60 to 89 Days Past Due [Member] | Residential [Member] | Home equity [Member]
Analysis by portfolio segment of the entity's past due loans [Abstract]
Total Past Due	34	12
60 to 89 Days Past Due [Member] | Consumer [Member]
Analysis by portfolio segment of the entity's past due loans [Abstract]
Total Past Due	$ 18	$ 1
[1]	Derived from audited consolidated financial statements.

Loans - Impaired Loan Balances

Loans - Impaired Loan Balances By Portfolio Segment (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Recorded Investment [Abstract]
Impaired loan, with no related allowance, recorded investment	$ 2,914	$ 1,724
Impaired loan, with related allowance, recorded investment	2,166	2,983
Impaired loan, total, recorded investment	5,080	4,707
Unpaid Principal Balance [Abstract]
Impaired loan, with no related allowance, unpaid principal balance	3,118	1,725
Impaired loan, with related allowance, unpaid principal balance	2,169	3,026
Impaired loan, total, unpaid principal balance	5,287	4,751
Impaired loan, total, related allowance	22	35
Average Recorded Investment [Abstract]
Impaired loan, with no related allowance, average recorded investment	1,927	2,216
Impaired loan, with related allowance, average recorded investment	2,693	2,387
Impaired loan, total, average recorded investment	4,620	4,603
Interest Income Recognized [Abstract]
Impaired loan, with no related allowance, interest income recognized	127	1
Impaired loan, with related allowance, interest income recognized	36	65
Impaired loan, total, interest income recognized	163	66
Commercial [Member]
Recorded Investment [Abstract]
Impaired loan, with no related allowance, recorded investment	25	4
Impaired loan, with related allowance, recorded investment	67	91
Impaired loan, total, recorded investment	92	95
Unpaid Principal Balance [Abstract]
Impaired loan, with no related allowance, unpaid principal balance	25	4
Impaired loan, with related allowance, unpaid principal balance	67	91
Impaired loan, total, unpaid principal balance	92	95
Impaired loan, total, related allowance	0	0
Average Recorded Investment [Abstract]
Impaired loan, with no related allowance, average recorded investment	9	47
Impaired loan, with related allowance, average recorded investment	93	99
Impaired loan, total, average recorded investment	102	146
Interest Income Recognized [Abstract]
Impaired loan, with no related allowance, interest income recognized	1	0
Impaired loan, with related allowance, interest income recognized	1	0
Impaired loan, total, interest income recognized	2	0
Commercial real estate [Member] | Construction and land development [Member]
Recorded Investment [Abstract]
Impaired loan, with no related allowance, recorded investment	238	205
Impaired loan, with related allowance, recorded investment	65	448
Impaired loan, total, recorded investment	303	653
Unpaid Principal Balance [Abstract]
Impaired loan, with no related allowance, unpaid principal balance	238	205
Impaired loan, with related allowance, unpaid principal balance	66	449
Impaired loan, total, unpaid principal balance	304	654
Impaired loan, total, related allowance	0	6
Average Recorded Investment [Abstract]
Impaired loan, with no related allowance, average recorded investment	238	220
Impaired loan, with related allowance, average recorded investment	324	563
Impaired loan, total, average recorded investment	562	783
Interest Income Recognized [Abstract]
Impaired loan, with no related allowance, interest income recognized	13	0
Impaired loan, with related allowance, interest income recognized	10	26
Impaired loan, total, interest income recognized	23	26
Commercial real estate [Member] | Real estate [Member]
Recorded Investment [Abstract]
Impaired loan, with no related allowance, recorded investment	1,837	1,202
Impaired loan, with related allowance, recorded investment	146	390
Impaired loan, total, recorded investment	1,983	1,592
Unpaid Principal Balance [Abstract]
Impaired loan, with no related allowance, unpaid principal balance	1,838	1,206
Impaired loan, with related allowance, unpaid principal balance	145	391
Impaired loan, total, unpaid principal balance	1,983	1,597
Impaired loan, total, related allowance	0	3
Average Recorded Investment [Abstract]
Impaired loan, with no related allowance, average recorded investment	1,282	1,504
Impaired loan, with related allowance, average recorded investment	346	353
Impaired loan, total, average recorded investment	1,628	1,857
Interest Income Recognized [Abstract]
Impaired loan, with no related allowance, interest income recognized	76	1
Impaired loan, with related allowance, interest income recognized	7	17
Impaired loan, total, interest income recognized	83	18
Residential [Member] | Real estate [Member]
Recorded Investment [Abstract]
Impaired loan, with no related allowance, recorded investment	395	127
Impaired loan, with related allowance, recorded investment	1,563	1,649
Impaired loan, total, recorded investment	1,958	1,776
Unpaid Principal Balance [Abstract]
Impaired loan, with no related allowance, unpaid principal balance	405	124
Impaired loan, with related allowance, unpaid principal balance	1,565	1,690
Impaired loan, total, unpaid principal balance	1,970	1,814
Impaired loan, total, related allowance	21	0
Average Recorded Investment [Abstract]
Impaired loan, with no related allowance, average recorded investment	198	126
Impaired loan, with related allowance, average recorded investment	1,582	1,034
Impaired loan, total, average recorded investment	1,780	1,160
Interest Income Recognized [Abstract]
Impaired loan, with no related allowance, interest income recognized	20	0
Impaired loan, with related allowance, interest income recognized	16	22
Impaired loan, total, interest income recognized	36	22
Residential [Member] | Home equity [Member]
Recorded Investment [Abstract]
Impaired loan, with no related allowance, recorded investment	409	173
Impaired loan, with related allowance, recorded investment	316	397
Impaired loan, total, recorded investment	725	570
Unpaid Principal Balance [Abstract]
Impaired loan, with no related allowance, unpaid principal balance	602	173
Impaired loan, with related allowance, unpaid principal balance	317	396
Impaired loan, total, unpaid principal balance	919	569
Impaired loan, total, related allowance	1	25
Average Recorded Investment [Abstract]
Impaired loan, with no related allowance, average recorded investment	189	305
Impaired loan, with related allowance, average recorded investment	335	327
Impaired loan, total, average recorded investment	524	632
Interest Income Recognized [Abstract]
Impaired loan, with no related allowance, interest income recognized	16	0
Impaired loan, with related allowance, interest income recognized	2	0
Impaired loan, total, interest income recognized	18	0
Consumer [Member]
Recorded Investment [Abstract]
Impaired loan, with no related allowance, recorded investment	10	13
Impaired loan, with related allowance, recorded investment	9	8
Impaired loan, total, recorded investment	19	21
Unpaid Principal Balance [Abstract]
Impaired loan, with no related allowance, unpaid principal balance	10	13
Impaired loan, with related allowance, unpaid principal balance	9	9
Impaired loan, total, unpaid principal balance	19	22
Impaired loan, total, related allowance	0	1
Average Recorded Investment [Abstract]
Impaired loan, with no related allowance, average recorded investment	11	14
Impaired loan, with related allowance, average recorded investment	13	11
Impaired loan, total, average recorded investment	24	25
Interest Income Recognized [Abstract]
Impaired loan, with no related allowance, interest income recognized	1	0
Impaired loan, with related allowance, interest income recognized	0	0
Impaired loan, total, interest income recognized	$ 1	$ 0

Loans - Loans Modified for Tro

Loans - Loans Modified for Troubled Debt Restructuring (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016USD ($)contract	Sep. 30, 2015USD ($)contract	Sep. 30, 2016USD ($)contract	Sep. 30, 2015USD ($)contract
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	1	4	5	11
Pre-Modification Outstanding Recorded Investment	$ 56	$ 540	$ 1,087	$ 1,190
Post-Modification Outstanding Recorded Investment	$ 47	$ 431	$ 1,075	$ 1,066
Commercial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	2	1	2
Pre-Modification Outstanding Recorded Investment	$ 0	$ 52	$ 24	$ 52
Post-Modification Outstanding Recorded Investment	$ 0	$ 31	$ 24	$ 31
Commercial real estate [Member] | Real estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	0	2	3
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 1,005	$ 256
Post-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 1,003	$ 249
Commercial real estate [Member] | Construction and land development [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	0	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Residential [Member] | Real estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	1	1	2	5
Pre-Modification Outstanding Recorded Investment	$ 56	$ 382	$ 58	$ 776
Post-Modification Outstanding Recorded Investment	$ 47	$ 294	$ 48	$ 680
Residential [Member] | Home equity [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	1	0	1
Pre-Modification Outstanding Recorded Investment	$ 0	$ 106	$ 0	$ 106
Post-Modification Outstanding Recorded Investment	$ 0	$ 106	$ 0	$ 106
Consumer [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	0	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0

Loans - Residential Real Estat

Loans - Residential Real Estate in Process of Foreclosures (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Receivables [Abstract]
Residential real estate in process of foreclosure	$ 1,424
Residential OREO	$ 470	$ 643

Loans - Loans Portfolio by Int

Loans - Loans Portfolio by Internal Risk Grading (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 1,083,201	$ 1,005,525	[1]
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	204,184	177,481
Commercial real estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	546,485	503,154
Commercial real estate [Member] | Construction and land development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	91,688	72,968
Commercial real estate [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	454,797	430,186
Commercial real estate [Member] | Real estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	454,797	430,186
Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	327,249	318,883
Residential [Member] | Real estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	218,632	220,434
Residential [Member] | Home equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	108,617	98,449
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	5,283	6,007
Consumer [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	5,249	5,999
Consumer [Member] | Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	34	8
Pass [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	203,353	175,963
Pass [Member] | Commercial real estate [Member] | Construction and land development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	88,992	68,853
Pass [Member] | Commercial real estate [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	443,317	418,719
Pass [Member] | Residential [Member] | Real estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	202,043	200,008
Pass [Member] | Residential [Member] | Home equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	106,106	96,142
Special Mention [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	688	1,364
Special Mention [Member] | Commercial real estate [Member] | Construction and land development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	792	1,210
Special Mention [Member] | Commercial real estate [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	6,755	5,860
Special Mention [Member] | Residential [Member] | Real estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	11,637	14,638
Special Mention [Member] | Residential [Member] | Home equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,373	1,314
Substandard [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	143	154
Substandard [Member] | Commercial real estate [Member] | Construction and land development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,904	2,905
Substandard [Member] | Commercial real estate [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	4,725	5,607
Substandard [Member] | Residential [Member] | Real estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	4,952	5,788
Substandard [Member] | Residential [Member] | Home equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,138	993
Doubtful [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Doubtful [Member] | Commercial real estate [Member] | Construction and land development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Doubtful [Member] | Commercial real estate [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Doubtful [Member] | Residential [Member] | Real estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Doubtful [Member] | Residential [Member] | Home equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 0	$ 0
[1]	Derived from audited consolidated financial statements.

Allowance for Loan Losses and54

Allowance for Loan Losses and Reserve for Unfunded Lending Commitments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended			12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016		Sep. 30, 2015	Dec. 31, 2015		Sep. 30, 2016	Dec. 31, 2015
Allowance for Loan Losses
Balance, beginning of period			$ 12,601	[1]	$ 12,427	$ 12,427
Provision for loan losses	$ 100	$ 0	200		700	950
Charge-offs			(245)		(883)	(1,200)
Recoveries			201		367	424
Balance, end of period	12,757	12,611	12,757		12,611	12,601	[1]
Reserve for Unfunded Lending Commitments
Balance, beginning of period			184		163	163
Provision for unfunded commitments			11		26	21
Charge-offs			0		0	0
Balance, end of period	195	189	195		189	184
Allowance for Loan Losses
Individually evaluated for impairment								$ 22	$ 35
Collectively evaluated for impairment								12,371	12,159
Total	12,757	$ 12,611	12,601	[1]	12,427	12,427		12,757	12,601	[1]
Loans
Individually evaluated for impairment								5,080	4,707
Collectively evaluated for impairment								1,048,382	966,940
Total Loans								1,083,201	1,005,525	[1]
Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for Loan Losses
Balance, beginning of period			407
Balance, end of period	364		364			407
Allowance for Loan Losses
Total	364		407			407		364	407
Loans
Total Loans								29,739	33,878
Commercial [Member]
Allowance for Loan Losses
Balance, beginning of period			2,065		1,818	1,818
Provision for loan losses			164			390
Charge-offs			(40)			(175)
Recoveries			26			32
Balance, end of period	2,215		2,215			2,065
Allowance for Loan Losses
Individually evaluated for impairment								0	0
Collectively evaluated for impairment								2,201	2,065
Total	2,215		2,065		1,818	1,818		2,215	2,065
Loans
Individually evaluated for impairment								92	95
Collectively evaluated for impairment								203,588	176,798
Total Loans								204,184	177,481
Commercial [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for Loan Losses
Balance, beginning of period			0
Balance, end of period	14		14			0
Allowance for Loan Losses
Total	14		0			0		14	0
Loans
Total Loans								504	588
Commercial real estate [Member]
Allowance for Loan Losses
Balance, beginning of period			6,930		6,814	6,814
Provision for loan losses			39			474
Charge-offs			0			(482)
Recoveries			22			124
Balance, end of period	6,991		6,991			6,930
Allowance for Loan Losses
Individually evaluated for impairment								0	9
Collectively evaluated for impairment								6,867	6,750
Total	6,991		6,930		6,814	6,814		6,991	6,930
Loans
Individually evaluated for impairment								2,286	2,245
Collectively evaluated for impairment								530,892	487,177
Total Loans								546,485	503,154
Commercial real estate [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for Loan Losses
Balance, beginning of period			171
Balance, end of period	124		124			171
Allowance for Loan Losses
Total	124		171			171		124	171
Loans
Total Loans								13,307	13,732
Residential [Member]
Allowance for Loan Losses
Balance, beginning of period			3,546		3,715	3,715
Provision for loan losses			(42)			15
Charge-offs			(63)			(323)
Recoveries			56			139
Balance, end of period	3,497		3,497			3,546
Allowance for Loan Losses
Individually evaluated for impairment								22	26
Collectively evaluated for impairment								3,249	3,284
Total	3,497		3,546		3,715	3,715		3,497	3,546
Loans
Individually evaluated for impairment								2,683	2,346
Collectively evaluated for impairment								308,654	297,281
Total Loans								327,249	318,883
Residential [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for Loan Losses
Balance, beginning of period			236
Balance, end of period	226		226			236
Allowance for Loan Losses
Total	226		236			236		226	236
Loans
Total Loans								15,912	19,256
Consumer [Member]
Allowance for Loan Losses
Balance, beginning of period			60		80	80
Provision for loan losses			39			71
Charge-offs			(142)			(220)
Recoveries			97			129
Balance, end of period	54		54			60
Allowance for Loan Losses
Individually evaluated for impairment								0	0
Collectively evaluated for impairment								54	60
Total	54		60		$ 80	80		54	60
Loans
Individually evaluated for impairment								19	21
Collectively evaluated for impairment								5,248	5,684
Total Loans								5,283	6,007
Consumer [Member] | Receivables Acquired with Deteriorated Credit Quality [Member]
Allowance for Loan Losses
Balance, beginning of period			0
Balance, end of period	0		0			0
Allowance for Loan Losses
Total	$ 0		$ 0			$ 0		0	0
Loans
Total Loans								$ 16	$ 302
[1]	Derived from audited consolidated financial statements.

Goodwill and Other Intangible55

Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands		1 Months Ended		3 Months Ended		9 Months Ended
		Jan. 31, 2015	Jul. 31, 2011	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Core deposit intangible				$ 0	$ 1,839	$ 0	$ 1,839
Goodwill
December 31, 2015	[1]					43,872
Additions						0
Amortization						0
Impairment						0
September 30, 2016				43,872	44,333	43,872	44,333
Intangibles
December 31, 2015						2,683
Additions						0
Amortization				(213)	$ (300)	(789)	$ (901)
Impairment						0
September 30, 2016				$ 1,894		$ 1,894
MidCarolina [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Core deposit intangible			$ 6,556
Amortization period of intangible			108 months
MainStreet BankShares, Inc. [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Core deposit intangible		$ 1,839
Amortization period of intangible		120 months
[1]	Derived from audited consolidated financial statements.

Short-term Borrowings (Details)

Short-term Borrowings (Details)	Sep. 30, 2016USD ($)bank	Dec. 31, 2015USD ($)
Debt Disclosure [Abstract]
Federal funds line of credit, number of banks | bank	2
Federal funds line of credit, amount per agreement	$ 15,000,000
Customer repurchase agreements	44,090,000	$ 40,611,000	[1]
Other short-term borrowings	15,000,000	0	[1]
Short-term borrowings	$ 59,090,000	$ 40,611,000
[1]	Derived from audited consolidated financial statements.

Long-term Borrowings (Details)

Long-term Borrowings (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015		Jan. 01, 2015
Debt Disclosure [Abstract]
Percentage of entity's assets equal to line of credit facility	30.00%
Collateral pledged under blanket floating lien agreement	$ 402,920,000
Long term advances with federal home loan bank [Abstract]
Advance Amount	9,974,000	$ 9,958,000	[1]
Advances due, net of fair value discount	26,000
Public deposit accounts	$ 150,467,000
MainStreet BankShares, Inc. [Member]
Long term advances with federal home loan bank [Abstract]
Long-term borrowings acquired				$ 0
Amount of loan taken to fund merger				$ 0
November 2017 [Member]
Long term advances with federal home loan bank [Abstract]
Due by	Nov. 30, 2017	Nov. 30, 2017
Advance Amount	$ 9,974,000	$ 9,958,000
November 2017 [Member] | Weighted Average [Member]
Long term advances with federal home loan bank [Abstract]
Weighted Average Rate	2.98%	2.98%
Federal Home Loan Bank Advances [Member]
Long term advances with federal home loan bank [Abstract]
Outstanding letters of credit	$ 70,000,000
US government and agency securities [Member]
Long term advances with federal home loan bank [Abstract]
Outstanding letters of credit	$ 133,297,000
[1]	Derived from audited consolidated financial statements.

Junior Subordinated Debt (Detai

Junior Subordinated Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2011	Apr. 07, 2006	Sep. 30, 2016	Jul. 01, 2011
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Proceeds from issuance of trust preferred securities		$ 20,000
Number of consecutive quarterly periods (up to 20 quarterly periods)	5 years
Proceeds from issuance of common securities			$ 619
Principal Amount			20,619
Mid Carolina Trust [Member]
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Principal Amount				$ 8,764
Equity method investments			264
AMNB Trust I [Member]
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]
Equity method investments			$ 619

Junior Subordinated Debt - Out

Junior Subordinated Debt - Outstanding Payables (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015	Jul. 01, 2011
Debt Instrument [Line Items]
Principal Amount	$ 20,619
MidCarolina Trust I [Member]
Debt Instrument [Line Items]
Valuation allowance associated with junior subordinated debenture	1,685		$ 1,197
MidCarolina Trust II [Member]
Debt Instrument [Line Items]
Valuation allowance associated with junior subordinated debenture		$ 1,761	$ 1,021
Junior Subordinated Debt Securities [Member]
Debt Instrument [Line Items]
Principal Amount	27,698	27,622
Junior Subordinated Debt Securities [Member] | AMNB Trust I [Member]
Debt Instrument [Line Items]
Principal Amount	20,619	20,619
Junior Subordinated Debt Securities [Member] | MidCarolina Trust I [Member]
Debt Instrument [Line Items]
Principal Amount	4,251	4,209
Junior Subordinated Debt Securities [Member] | MidCarolina Trust II [Member]
Debt Instrument [Line Items]
Principal Amount	$ 2,828	$ 2,794
LIBOR [Member] | Junior Subordinated Debt Securities [Member] | AMNB Trust I [Member]
Debt Instrument [Line Items]
Basis Spread on Variable Rate	1.35%
LIBOR [Member] | Junior Subordinated Debt Securities [Member] | MidCarolina Trust I [Member]
Debt Instrument [Line Items]
Basis Spread on Variable Rate	3.45%
LIBOR [Member] | Junior Subordinated Debt Securities [Member] | MidCarolina Trust II [Member]
Debt Instrument [Line Items]
Basis Spread on Variable Rate	2.95%

Stock Based Compensation - Narr

Stock Based Compensation - Narrative (Details)	9 Months Ended		12 Months Ended
	Sep. 30, 2016USD ($)directorshares	Sep. 30, 2015USD ($)shares	Dec. 31, 2015USD ($)shares	Apr. 22, 2008shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of common stock authorizes for issuance (in shares) | shares				500,000
Unrecognized compensation expense	$ 0
Regular monthly board retainer director could receive in cash	1,667
Regular monthly board retainer if restricted stock vested	2,083
Monthly meeting fees a director could receive in cash	725
Monthly meeting fees a director could receive if restricted stock vested	$ 900
Number of directors elected to receive stock in lieu of cash | director	13
Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued as payment for deferred compensation (in shares) | shares			4,158
Market value of shares issued as payment of deferred compensation			$ 95,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum vesting period of granted restricted stock	36 months
Unrecognized compensation expense	$ 585,000		$ 340,000
Weighted average period for recognition of unrecognized compensation cost	1 year 6 months 4 days
Share based compensation expense	$ 342,000	$ 249,000
Number of shares issued (in shares) | shares	10,588	8,630
Recognized share based compensation expense	$ 281,000	$ 195,000

Stock Based Compensation - Stoc

Stock Based Compensation - Stock Options Transactions (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Option Shares [Abstract]
Outstanding at beginning of period (in shares)	67,871
Acquired in acquisition (in shares)	0
Granted (in shares)	0
Exercised (in shares)	(4,134)	(22,074)
Forfeited (in shares)	0
Expired (in shares)	0
Outstanding at end of period (in shares)	63,737
Exercisable at end of period (in shares)	63,737
Weighted Average Exercise Price [Abstract]
Outstanding at beginning of period (in dollars per share)	$ 24.47
Acquired in acquisition (in dollars per share)	0
Granted (in dollars per share)	0
Exercised (in dollars per share)	24.30
Forfeited (in dollars per share)	0
Expired (in dollars per share)	0
Outstanding at end of period (in dollars per share)	24.48
Exercisable at end of period (in dollars per share)	$ 24.48
Weighted Average Remaining Contractual Term [Abstract]
Outstanding at end of period	1 year 10 months 21 days
Exercisable at end of period	1 year 10 months 21 days
Aggregate Intrinsic Value [Abstract]
Outstanding at end of period	$ 248
Exercisable at end of period	$ 248

Stock Based Compensation - Rest

Stock Based Compensation - Restricted Stock Activity (Details) - Restricted Stock [Member]	9 Months Ended
	Sep. 30, 2016$ / sharesshares
Shares [Roll Forward]
Nonvested at December 31, 2015 (in shares) | shares	41,563
Granted (in shares) | shares	25,943
Vested (in shares) | shares	(19,219)
Forfeited (in shares) | shares	(547)
Nonvested at September 30, 2016 (in shares) | shares	47,740
Weighted Average Grant Date Fair Value [Roll Forward]
Nonvested at December 31, 2015 (in dollars per share) | $ / shares	$ 22.15
Granted (in dollars per share) | $ / shares	23.07
Vested (in dollars per share) | $ / shares	21.47
Forfeited (in dollars per share) | $ / shares	21.98
Nonvested at September 30, 2015 (in dollars per share) | $ / shares	$ 22.93

Earnings Per Common Share (Deta

Earnings Per Common Share (Details) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Shares [Abstract]
Basic earnings per share (in shares)	8,608,323	8,668,618	8,610,100	8,698,394
Effect of dilutive securities - stock options (in shares)	10,012	7,953	8,286	8,476
Diluted earnings per share (in shares)	8,618,335	8,676,571	8,618,386	8,706,870
Per Share Amount [Abstract]
Basic earnings per share (in dollars per share)	$ 0.46	$ 0.47	$ 1.41	$ 1.20
Effect of dilutive securities - stock options (in dollars per share)	0	0	0	0
Diluted earnings per share (in dollars per share)	$ 0.46	$ 0.47	$ 1.41	$ 1.20
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities not included in computation of earning per share (in shares)			14,205	78,127

Employee Benefit Plans (Details

Employee Benefit Plans (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Components of Net Periodic Benefit Cost
Service cost	$ 0	$ 0
Interest cost	201	148
Expected return on plan assets	(288)	(230)
Recognized net actuarial loss	389	308
Net periodic cost	$ 302	$ 226

Fair Value of Financial Instr65

Fair Value of Financial Instruments - Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Assets
Securities available for sale, at fair value	$ 351,439	$ 340,349	[1]
Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
Assets
Securities available for sale, at fair value		0
Significant Other Observable Inputs Level 2 [Member]
Assets
Securities available for sale, at fair value	351,439	338,863
Significant Unobservable Inputs Level 3 [Member]
Assets
Securities available for sale, at fair value	0	1,486
Fair Value, Measurements, Recurring [Member]
Assets
Securities available for sale, at fair value	351,439	340,349
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
Assets
Securities available for sale, at fair value	0	0
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs Level 2 [Member]
Assets
Securities available for sale, at fair value	351,439	338,863
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs Level 3 [Member]
Assets
Securities available for sale, at fair value	0	1,486
Federal agencies and GSEs [Member]
Assets
Securities available for sale, at fair value	96,978	81,452
Federal agencies and GSEs [Member] | Fair Value, Measurements, Recurring [Member]
Assets
Securities available for sale, at fair value	96,978	81,452
Federal agencies and GSEs [Member] | Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
Assets
Securities available for sale, at fair value	0	0
Federal agencies and GSEs [Member] | Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs Level 2 [Member]
Assets
Securities available for sale, at fair value	96,978	81,452
Federal agencies and GSEs [Member] | Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs Level 3 [Member]
Assets
Securities available for sale, at fair value	0	0
Mortgage-backed and CMOs [Member]
Assets
Securities available for sale, at fair value	80,987	70,930
Mortgage-backed and CMOs [Member] | Fair Value, Measurements, Recurring [Member]
Assets
Securities available for sale, at fair value	80,987	70,930
Mortgage-backed and CMOs [Member] | Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
Assets
Securities available for sale, at fair value	0	0
Mortgage-backed and CMOs [Member] | Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs Level 2 [Member]
Assets
Securities available for sale, at fair value	80,987	70,930
Mortgage-backed and CMOs [Member] | Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs Level 3 [Member]
Assets
Securities available for sale, at fair value	0	0
State and municipal [Member]
Assets
Securities available for sale, at fair value	162,820	175,891
State and municipal [Member] | Fair Value, Measurements, Recurring [Member]
Assets
Securities available for sale, at fair value	162,820	175,891
State and municipal [Member] | Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
Assets
Securities available for sale, at fair value	0	0
State and municipal [Member] | Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs Level 2 [Member]
Assets
Securities available for sale, at fair value	162,820	175,891
State and municipal [Member] | Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs Level 3 [Member]
Assets
Securities available for sale, at fair value	0	0
Corporate [Member]
Assets
Securities available for sale, at fair value	8,820	10,590
Corporate [Member] | Fair Value, Measurements, Recurring [Member]
Assets
Securities available for sale, at fair value	8,820	10,590
Corporate [Member] | Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
Assets
Securities available for sale, at fair value	0	0
Corporate [Member] | Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs Level 2 [Member]
Assets
Securities available for sale, at fair value	8,820	10,590
Corporate [Member] | Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs Level 3 [Member]
Assets
Securities available for sale, at fair value	0	0
Equity securities [Member]
Assets
Securities available for sale, at fair value	1,834	1,486
Equity securities [Member] | Fair Value, Measurements, Recurring [Member]
Assets
Securities available for sale, at fair value	1,834	1,486
Equity securities [Member] | Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
Assets
Securities available for sale, at fair value	0	0
Equity securities [Member] | Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs Level 2 [Member]
Assets
Securities available for sale, at fair value	1,834	0
Equity securities [Member] | Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs Level 3 [Member]
Assets
Securities available for sale, at fair value	$ 0	$ 1,486
[1]	Derived from audited consolidated financial statements.

Fair Value of Financial Instr66

Fair Value of Financial Instruments - Level 3 Fair Value Measurements (Details) - Significant Unobservable Inputs Level 3 [Member] - Equity securities [Member] $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 1,486
Total Realized / Unrealized Gains (Losses) Included in Net Income	0
Total Realized / Unrealized Gains (Losses) Included in Other Comprehensive Income	93
Total Realized / Unrealized Gains (Losses) Included in Purchases, Sales, Issuances and Settlements, Net	0
Transfer In (Out) of Level 3	(1,579)
Ending balance	$ 0

Fair Value of Financial Instr67

Fair Value of Financial Instruments - Narrative (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets fair value adjustments	$ 0	$ 0

Fair Value of Financial Instr68

Fair Value of Financial Instruments - Assets Measured on Nonrecurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
Assets
Loans held for sale	$ 0	$ 0
Significant Other Observable Inputs Level 2 [Member]
Assets
Loans held for sale	4,776	3,266
Significant Unobservable Inputs Level 3 [Member]
Assets
Loans held for sale	0	0
Fair Value, Measurements, Nonrecurring [Member]
Assets
Loans held for sale	4,776	3,266
Impaired loans, net of valuation allowance	2,144	2,948
Other real estate owned, net	1,145	2,184
Fair Value, Measurements, Nonrecurring [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
Assets
Loans held for sale	0	0
Impaired loans, net of valuation allowance	0	0
Other real estate owned, net	0	0
Fair Value, Measurements, Nonrecurring [Member] | Significant Other Observable Inputs Level 2 [Member]
Assets
Loans held for sale	4,776	3,266
Impaired loans, net of valuation allowance	0	0
Other real estate owned, net	0	0
Fair Value, Measurements, Nonrecurring [Member] | Significant Unobservable Inputs Level 3 [Member]
Assets
Loans held for sale	0	0
Impaired loans, net of valuation allowance	2,144	2,948
Other real estate owned, net	$ 1,145	$ 2,184

Fair Value of Financial Instr69

Fair Value of Financial Instruments - Level 3 Quantitative Information (Details)	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Securities available-for-sale [Member]
Fair Value Inputs, Quantitative Information [Abstract]
Selling cost		49.00%
Impaired loans [Member]
Fair Value Inputs, Quantitative Information [Abstract]
Selling cost	8.00%	6.00%
Discount rate		4.00%
Other real estate owned, net [Member]
Fair Value Inputs, Quantitative Information [Abstract]
Selling cost	6.00%	6.00%

Fair Value of Financial Instr70

Fair Value of Financial Instruments - Carrying and Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Financial Assets:
Securities available for sale	$ 351,439	$ 340,349	[1]
Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
Financial Assets:
Cash and cash equivalents	72,817	95,337
Securities available for sale		0
Restricted stock	0	0
Loans held for sale	0	0
Loans, net of allowance	0	0
Bank owned life insurance	0	0
Accrued interest receivable	0	0
Financial Liabilities:
Deposits	0	0
Repurchase agreements	0	0
Other borrowings		0
Junior subordinated debt	0	0
Accrued interest payable	0	0
Quoted Prices in Active Markets for Identical Assets Level 1 [Member] | Long-term Borrowings [Member]
Financial Liabilities:
Borrowings	0
Quoted Prices in Active Markets for Identical Assets Level 1 [Member] | Other Short-term Borrowings [Member]
Financial Liabilities:
Borrowings	0
Significant Other Observable Inputs Level 2 [Member]
Financial Assets:
Cash and cash equivalents	0	0
Securities available for sale	351,439	338,863
Restricted stock	6,006	5,312
Loans held for sale	4,776	3,266
Loans, net of allowance	0	0
Bank owned life insurance	17,998	17,658
Accrued interest receivable	4,574	4,116
Financial Liabilities:
Deposits	911,717	865,350
Repurchase agreements	44,090	40,611
Other borrowings		0
Junior subordinated debt	0	0
Accrued interest payable	637	655
Significant Other Observable Inputs Level 2 [Member] | Long-term Borrowings [Member]
Financial Liabilities:
Borrowings	0
Significant Other Observable Inputs Level 2 [Member] | Other Short-term Borrowings [Member]
Financial Liabilities:
Borrowings	0
Significant Unobservable Inputs Level 3 [Member]
Financial Assets:
Cash and cash equivalents	0	0
Securities available for sale	0	1,486
Restricted stock	0	0
Loans held for sale	0	0
Loans, net of allowance	1,069,612	994,808
Bank owned life insurance	0	0
Accrued interest receivable	0	0
Financial Liabilities:
Deposits	395,543	396,551
Repurchase agreements	0	0
Other borrowings		10,293
Junior subordinated debt	28,139	22,940
Accrued interest payable	0	0
Significant Unobservable Inputs Level 3 [Member] | Long-term Borrowings [Member]
Financial Liabilities:
Borrowings	10,228
Significant Unobservable Inputs Level 3 [Member] | Other Short-term Borrowings [Member]
Financial Liabilities:
Borrowings	15,000
Carrying Value [Member]
Financial Assets:
Cash and cash equivalents	72,817	95,337
Securities available for sale	351,439	340,349
Restricted stock	6,006	5,312
Loans held for sale	4,776	3,266
Loans, net of allowance	1,070,444	992,924
Bank owned life insurance	17,998	17,658
Accrued interest receivable	4,574	4,116
Financial Liabilities:
Deposits	1,306,008	1,262,660
Repurchase agreements	44,090	40,611
Other borrowings		9,958
Junior subordinated debt	27,698	27,622
Accrued interest payable	637	655
Carrying Value [Member] | Long-term Borrowings [Member]
Financial Liabilities:
Borrowings	9,974
Carrying Value [Member] | Other Short-term Borrowings [Member]
Financial Liabilities:
Borrowings	15,000
Fair Value [Member]
Financial Assets:
Cash and cash equivalents	72,817	95,337
Securities available for sale	351,439	340,349
Restricted stock	6,006	5,312
Loans held for sale	4,776	3,266
Loans, net of allowance	1,069,612	994,808
Bank owned life insurance	17,998	17,658
Accrued interest receivable	4,574	4,116
Financial Liabilities:
Deposits	1,307,260	1,261,901
Repurchase agreements	44,090	40,611
Other borrowings		10,293
Junior subordinated debt	28,139	22,940
Accrued interest payable	637	$ 655
Fair Value [Member] | Long-term Borrowings [Member]
Financial Liabilities:
Borrowings	10,228
Fair Value [Member] | Other Short-term Borrowings [Member]
Financial Liabilities:
Borrowings	$ 15,000
[1]	Derived from audited consolidated financial statements.

Segment and Related Informati71

Segment and Related Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)segment	Sep. 30, 2015USD ($)	Dec. 31, 2015USD ($)	[1]
Segment Reporting [Abstract]
Number of reportable segments | segment			2
Segment Reporting Information [Line Items]
Interest income	$ 14,063	$ 13,542	$ 42,003	$ 41,218
Interest expense	1,599	1,481	4,795	4,397
Noninterest income	3,120	3,055	9,784	9,469
Income (loss) before income taxes	5,617	5,728	17,351	14,513
Net income (loss)	3,963	4,037	12,179	10,432
Depreciation and amortization	673	775	2,198	2,258
Total assets	1,615,534	1,512,437	1,615,534	1,512,437	$ 1,547,599
Goodwill	43,872	44,333	43,872	44,333	$ 43,872
Capital expenditures	267	602	536	1,203
Operating Segments [Member] | Community Banking [Member]
Segment Reporting Information [Line Items]
Interest income	14,040	13,527	41,950	41,173
Interest expense	1,376	1,290	4,151	3,834
Noninterest income	1,967	1,788	6,302	5,809
Income (loss) before income taxes	5,356	5,160	16,538	13,314
Net income (loss)	3,760	3,626	11,558	9,522
Depreciation and amortization	671	772	2,190	2,249
Total assets	1,611,624	1,510,324	1,611,624	1,510,324
Goodwill	43,872	44,333	43,872	44,333
Capital expenditures	267	602	536	1,182
Operating Segments [Member] | Trust and Investment Services [Member]
Segment Reporting Information [Line Items]
Interest income	0	0	0	0
Interest expense	0	0	0	0
Noninterest income	1,147	1,262	3,465	3,645
Income (loss) before income taxes	672	803	2,006	2,026
Net income (loss)	474	566	1,408	1,456
Depreciation and amortization	2	3	8	9
Total assets	0	0	0	0
Goodwill	0	0	0	0
Capital expenditures	0	0	0	21
Other [Member]
Segment Reporting Information [Line Items]
Interest income	23	15	53	45
Interest expense	223	191	644	563
Noninterest income	6	5	17	15
Income (loss) before income taxes	(411)	(235)	(1,193)	(827)
Net income (loss)	(271)	(155)	(787)	(546)
Depreciation and amortization	0	0	0	0
Total assets	231,496	224,120	231,496	224,120
Goodwill	0	0	0	0
Capital expenditures	0	0	0	0
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Interest income	0	0	0	0
Interest expense	0	0	0	0
Noninterest income	0	0	0	0
Income (loss) before income taxes	0	0	0	0
Net income (loss)	0	0	0	0
Depreciation and amortization	0	0	0	0
Total assets	(227,586)	(222,007)	(227,586)	(222,007)
Goodwill	0	0	0	0
Capital expenditures	$ 0	$ 0	$ 0	$ 0
[1]	Derived from audited consolidated financial statements.

Supplemental Cash Flow Inform72

Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015		Dec. 31, 2014
Supplemental Schedule of Cash and Cash Equivalents:
Cash and due from banks	$ 37,679	$ 19,280	$ 19,352	[1]
Interest-bearing deposits in other banks	35,138	46,637	75,985	[1]
Federal funds sold	0	0
Cash and Cash Equivalents	72,817	65,917	$ 95,337		$ 67,303
Cash paid for:
Interest on deposits and borrowed funds	4,813	4,341
Income taxes	5,440	2,950
Noncash investing and financing activities:
Transfer of loans to other real estate owned	97	1,094
Unrealized gains (losses) on securities available for sale	720	(582)
Assets acquired:
Investment securities	0	18,800
Restricted stock	0	587
Loans	0	115,050
Premises and equipment	0	1,030
Deferred income taxes	0	2,773
Core deposit intangible	0	1,839
Other real estate owned	0	168
Bank owned life insurance	0	1,955
Other assets	0	1,077
Liabilities assumed:
Deposits	0	137,323
Other liabilities	0	3,001
Consideration:
Issuance of common stock	$ 0	$ 20,483
[1]	Derived from audited consolidated financial statements.

Accumulated Other Comprehensi73

Accumulated Other Comprehensive Income - Components of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016		Sep. 30, 2015
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance			$ 197,835	[1]	$ 173,780
Net unrealized gains (losses) on securities available for sale, net of tax	$ (925)	$ 887
Reclassification adjustment for gains on sales of securities, net of tax	(48)	(3)
Ending Balance	203,713	196,451	203,713		196,451
Net Unrealized Gains (Losses) on Securities [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	5,563	4,583	4,122		5,845
Net unrealized gains (losses) on securities available for sale, net of tax	(925)	887	898		(19)
Reclassification adjustment for gains on sales of securities, net of tax	(48)	(3)	(430)		(359)
Ending Balance	4,590	5,467	4,590		5,467
Net unrealized gains (losses) on securities available for sale, tax	499	(478)	(483)		10
Reclassification adjustment for gains on sales of securities, tax	25	3	231		194
Adjustments Related to Pension Benefits [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(1,832)	(2,181)	(1,832)		(2,181)
Net unrealized gains (losses) on securities available for sale, net of tax	0	0	0		0
Reclassification adjustment for gains on sales of securities, net of tax	0	0	0		0
Ending Balance	(1,832)	(2,181)	(1,832)		(2,181)
Accumulated Other Comprehensive Income (Loss) [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	3,731	2,402	2,290		3,664
Net unrealized gains (losses) on securities available for sale, net of tax			898		(19)
Reclassification adjustment for gains on sales of securities, net of tax			(430)		(359)
Ending Balance	$ 2,758	$ 3,286	$ 2,758		$ 3,286
[1]	Derived from audited consolidated financial statements.

Accumulated Other Comprehensi74

Accumulated Other Comprehensive Income - Reclassifications Out of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Securities gains, net	$ 73	$ 6	$ 661	$ 553
Income taxes	(1,654)	(1,691)	(5,172)	(4,081)
Net Income	3,963	4,037	12,179	10,432
Realized gain on sale of securities [Member] | Reclassification Out Of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Securities gains, net	73	6	661	553
Income taxes	(25)	(3)	(231)	(194)
Net Income	$ 48	$ 3	$ 430	$ 359