CSB Bancorp (CSBB) 10-Q 9 Nov 17 2017 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Nov. 01, 2017
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q3
Trading Symbol	CSBB
Entity Registrant Name	CSB BANCORP INC /OH
Entity Central Index Key	880,417
Current Fiscal Year End Date	--12-31
Entity Filer Category	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		2,742,242

Consolidated Balance Sheets (Un

Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Cash and cash equivalents
Cash and due from banks	$ 15,592	$ 13,590
Interest-earning deposits in other banks	29,780	23,248
Total cash and cash equivalents	45,372	36,838
Securities
Available-for-sale, at fair value	98,048	103,875
Held-to-maturity (fair value 2017-$26,431; 2016-$23,444)	26,475	23,883
Restricted stock, at cost	4,614	4,614
Total securities	129,137	132,372
Loans held for sale	1,108
Loans	509,458	475,449
Less allowance for loan losses	5,436	5,291
Net loans	504,022	470,158
Premises and equipment, net	8,906	8,749
Core deposit intangible	296	383
Goodwill	4,728	4,728
Bank-owned life insurance	13,131	10,361
Accrued interest receivable and other assets	4,124	6,389
TOTAL ASSETS	710,824	669,978
Deposits
Noninterest-bearing	167,563	167,824
Interest-bearing	404,063	372,961
Total deposits	571,626	540,785
Short-term borrowings	45,057	48,742
Other borrowings	21,596	12,385
Accrued interest payable and other liabilities	2,707	2,651
Total liabilities	640,986	604,563
SHAREHOLDERS' EQUITY
Common stock, $6.25 par value. Authorized 9,000,000 shares; issued 2,980,602 shares; outstanding (shares 2017 and 2016 - 2,742,242)	18,629	18,629
Additional paid-in capital	9,815	9,815
Retained earnings	46,250	42,629
Treasury stock at cost (shares 2017 and 2016 - 238,360)	(4,784)	(4,784)
Accumulated other comprehensive loss	(72)	(874)
Total shareholders' equity	69,838	65,415
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 710,824	$ 669,978

Consolidated Balance Sheets (U3

Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Held-to-maturity, fair value	$ 26,431	$ 23,444
Common stock, par value	$ 6.25	$ 6.25
Common stock, authorized shares	9,000,000	9,000,000
Common stock, shares issued	2,980,602	2,980,602
Common stock, shares outstanding	2,742,242	2,742,242
Treasury stock, at cost	238,360	238,360

Consolidated Statements of Inco

Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
INTEREST AND DIVIDEND INCOME
Loans, including fees	$ 5,907	$ 5,042	$ 16,940	$ 14,750
Taxable securities	599	634	1,796	2,032
Nontaxable securities	171	163	509	482
Other	89	24	180	73
Total interest and dividend income	6,766	5,863	19,425	17,337
INTEREST EXPENSE
Deposits	368	249	942	758
Short-term borrowings	49	19	106	55
Other borrowings	145	98	361	296
Total interest expense	562	366	1,409	1,109
NET INTEREST INCOME	6,204	5,497	18,016	16,228
PROVISION FOR LOAN LOSSES	280	164	965	493
Net interest income, after provision for loan losses	5,924	5,333	17,051	15,735
NONINTEREST INCOME
Service charges on deposit accounts	287	301	847	867
Trust services	122	213	481	657
Debit card interchange fees	298	270	882	803
Gain on sale of loans, net	94	71	197	221
Earnings on bank owned life insurance	86	70	270	207
Securities gains		1		1
Other income	167	169	543	428
Total noninterest income	1,054	1,095	3,220	3,184
NONINTEREST EXPENSES
Salaries and employee benefits	2,531	2,319	7,462	6,945
Occupancy expense	236	229	660	707
Equipment expense	143	170	485	513
Professional and director fees	257	221	660	584
Financial institutions and franchise tax expense	131	107	394	320
Marketing and public relations	91	94	259	322
Software expense	219	203	633	587
Debit card expense	139	120	410	338
Amortization of intangible assets	29	30	87	91
FDIC insurance expense	58	57	160	222
Other expenses	452	444	1,410	1,416
Total noninterest expenses	4,286	3,994	12,620	12,045
Income before income taxes	2,692	2,434	7,651	6,874
FEDERAL INCOME TAX PROVISION	826	740	2,329	2,089
NET INCOME	$ 1,866	$ 1,694	$ 5,322	$ 4,785
Basic and diluted net earnings per share	$ 0.68	$ 0.61	$ 1.94	$ 1.74

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 1,866	$ 1,694	$ 5,322	$ 4,785
Other comprehensive income (loss)
Unrealized (losses) gains arising during the period	(255)	128	1,132	1,455
Amounts reclassified from accumulated other comprehensive income, held-to-maturity	27	175	84	491
Income tax effect	78	(103)	(414)	(661)
Reclassification adjustment for gains on available-for-sale securities included in net income		(1)		(1)
Income tax effect	0	0	0	0
Other comprehensive income (loss)	(150)	199	802	1,284
Total comprehensive income	$ 1,716	$ 1,893	$ 6,124	$ 6,069

Condensed Consolidated Statemen

Condensed Consolidated Statements of Changes in Shareholders' Equity (Unaudited) $ in Thousands	USD ($)$ / shares
Balance at beginning of period at Dec. 31, 2015	$ 61,266
Statement of Stockholders' Equity [Abstract]
Net income	4,785
Other comprehensive income (loss)	1,284
Stock options exercised	7
Cash dividends declared	(1,591)
Balance at end of period at Sep. 30, 2016	$ 65,751
Statement of Stockholders' Equity [Abstract]
Cash dividends declared per share | $ / shares	$ 0.58
Balance at beginning of period at Jun. 30, 2016	$ 64,407
Statement of Stockholders' Equity [Abstract]
Net income	1,694
Other comprehensive income (loss)	199
Cash dividends declared	(549)
Balance at end of period at Sep. 30, 2016	$ 65,751
Statement of Stockholders' Equity [Abstract]
Cash dividends declared per share | $ / shares	$ 0.20
Balance at beginning of period at Dec. 31, 2016	$ 65,415
Statement of Stockholders' Equity [Abstract]
Net income	5,322
Other comprehensive income (loss)	802
Cash dividends declared	(1,701)
Balance at end of period at Sep. 30, 2017	$ 69,838
Statement of Stockholders' Equity [Abstract]
Cash dividends declared per share | $ / shares	$ 0.62
Balance at beginning of period at Jun. 30, 2017	$ 68,726
Statement of Stockholders' Equity [Abstract]
Net income	1,866
Other comprehensive income (loss)	(150)
Cash dividends declared	(604)
Balance at end of period at Sep. 30, 2017	$ 69,838
Statement of Stockholders' Equity [Abstract]
Cash dividends declared per share | $ / shares	$ 0.22

Condensed Consolidated Stateme7

Condensed Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (Parenthetical)	9 Months Ended
	Sep. 30, 2016shares
Statement of Stockholders' Equity [Abstract]
Stock options exercised, shares	1,246

Condensed Consolidated Stateme8

Condensed Consolidated Statements of Cash Flows (Unaudited) $ in Thousands	9 Months Ended
	Sep. 30, 2017USD ($)	Sep. 30, 2016USD ($)
Statement of Cash Flows [Abstract]
NET CASH FROM OPERATING ACTIVITIES	$ 4,812	$ 6,206
Securities:
Proceeds from repayments, held-to-maturity	2,156	18,302
Proceeds from repayments, available-for-sale	15,818	38,139
Purchases, available-for-sale	(9,243)	(22,217)
Purchases, held-to-maturity	(4,700)	(7,000)
Proceeds from sale of available-for-sale securities	0	1
Loan originations, net of repayments	(34,774)	(40,480)
Property, equipment and software acquisitions	(805)	(1,055)
Net cash used in investing activities	(31,548)	(14,310)
CASH FLOWS FROM FINANCING ACTIVITIES
Net change in deposits	30,841	(2,802)
Net change in short-term borrowings	(3,685)	2,369
Proceeds from other borrowings	10,000
Repayment of other borrowings	(789)	(989)
Cash dividends paid	(1,097)	(1,042)
Net cash provided by (used in) financing activities	35,270	(2,464)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	8,534	(10,568)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	36,838	38,272
CASH AND CASH EQUIVALENTS AT END OF PERIOD	45,372	27,704
Cash paid during the year for:
Interest	1,393	1,124
Income taxes	2,920	1,900
Noncash financing activities:
Dividends declared	$ 604	$ 549

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2017
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	NOTE 1 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES The accompanying condensed consolidated financial statements include the accounts of CSB Bancorp, Inc. and its wholly-owned subsidiaries, The Commercial and Savings Bank (the “Bank”) and CSB Investment Services, LLC (together referred to as the “Company” or “CSB”). All significant intercompany transactions and balances have been eliminated in consolidation. The condensed consolidated financial statements have been prepared without audit. In the opinion of management, all adjustments (which include normal recurring adjustments) necessary to present fairly the Company’s financial position at September 30, 2017, and the results of operations and changes in cash flows for the periods presented have been made. Certain information and footnote disclosures typically included in financial statements prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) have been omitted. The Annual Report for CSB for the year ended December 31, 2016, contains Consolidated Financial Statements and related footnote disclosures, which should be read in conjunction with the accompanying Consolidated Financial Statements. The results of operations for the period ended September 30, 2017 are not necessarily indicative of the operating results for the full year or any future interim period. Certain items in the prior-year financial statements were reclassified to conform to the current-year presentation. RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS ASU 2014-09 2014-09 one-year year-end, ASU 2016-01 ASU 2016-02 right-of-use ASU 2016-13 one-time one-time ASU 2016-15 ASU 2017-04

Securities

Securities	9 Months Ended
	Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Securities	NOTE 2 – SECURITIES Securities consist of the following at September 30, 2017 and December 31, 2016: (Dollars in thousands) Amortized Gross Gross Fair value September 30, 2017 Available-for-sale U.S. Treasury security $ 999 $ — $ 1 $ 998 U.S. Government agencies 8,350 — 50 8,300 Mortgage-backed securities of government agencies 50,452 340 286 50,506 Asset-backed securities of government agencies 1,198 — 4 1,194 State and political subdivisions 27,166 385 74 27,477 Corporate bonds 9,580 70 167 9,483 Equity securities 53 37 — 90 Total available-for-sale 97,798 832 582 98,048 Held-to-maturity U.S. Government agencies 9,475 21 153 9,343 Mortgage-backed securities of government agencies 12,300 170 96 12,374 State and political subdivisions 4,700 14 — 4,714 Total held-to-maturity 26,475 205 249 26,431 Restricted stock 4,614 — — 4,614 Total securities $ 128,887 $ 1,037 $ 831 $ 129,093 December 31, 2016 Available-for-sale U.S. Treasury security $ 1,001 $ — $ — $ 1,001 U.S. Government agencies 6,500 — 98 6,402 Mortgage-backed securities of government agencies 56,187 239 589 55,837 Other mortgage-backed securities 65 — — 65 Asset-backed securities of government agencies 1,312 — 46 1,266 State and political subdivisions 30,007 140 439 29,708 Corporate bonds 9,632 28 144 9,516 Equity securities 53 27 — 80 Total available-for-sale 104,757 434 1,316 103,875 Held-to-maturity U.S. Government agencies 9,472 17 396 9,093 Mortgage-backed securities of government agencies 14,411 141 201 14,351 Total held-to-maturity 23,883 158 597 23,444 Restricted stock 4,614 — — 4,614 Total securities $ 133,254 $ 592 $ 1,913 $ 131,933 The amortized cost and fair value of debt securities at September 30, 2017, by contractual maturity, are shown below. Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. (Dollars in thousands) Amortized Fair value Available-for-sale Due in one year or less $ 3,190 $ 3,208 Due after one through five years 18,798 18,917 Due after five through ten years 26,083 26,271 Due after ten years 49,674 49,562 Total debt securities available-for-sale $ 97,745 $ 97,958 Held-to-maturity Due in one year or less $ 4,700 $ 4,714 Due after one through five years 477 498 Due after five through ten years 3,000 2,914 Due after ten years 18,298 18,305 Total debt securities held-to-maturity $ 26,475 $ 26,431 Securities with a fair value of approximately $101 million and $95 million were pledged at September 30, 2017 and December 31, 2016, respectively, to secure public deposits, as well as other deposits and borrowings as required or permitted by law. Restricted stock primarily consists of investments in Federal Home Loan Bank of Cincinnati (FHLB) and Federal Reserve Bank stock. The Bank’s investment in FHLB stock amounted to approximately $4.1 million at September 30, 2017 and December 31, 2016. Federal Reserve Bank stock was $471 thousand at September 30, 2017 and December 31, 2016. There were no proceeds from sales of securities for the three or nine month periods ending September 30, 2017. There were proceeds received and gains recognized of $1 thousand on the conversion of restricted stock in the nine month period ending September 30, 2016. The following table presents gross unrealized losses and fair value of securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at September 30, 2017 and December 31, 2016: Securities in a continuous unrealized loss position Less than 12 months 12 months or more Total (Dollars in thousands) Gross Fair Gross Fair Gross Fair September 30, 2017 Available-for-sale U.S. Treasury security $ 1 $ 998 $ — $ — $ 1 $ 998 U.S. Government agencies 10 3,840 40 4,460 50 8,300 Mortgage-backed securities of government agencies 245 20,128 41 2,316 286 22,444 Asset-backed securities of government agencies — — 4 1,194 4 1,194 State and political subdivisions 9 1,693 65 2,961 74 4,654 Corporate bonds — — 167 2,333 167 2,333 Held-to-maturity U.S. Government agencies 32 3,966 121 4,879 153 8,845 Mortgage-backed securities of government agencies 3 2,011 93 3,274 96 5,285 Total temporarily impaired securities $ 300 $ 32,636 $ 531 $ 21,417 $ 831 $ 54,053 December 31, 2016 Available-for-sale U.S. Government agencies $ 98 $ 6,402 $ — $ — $ 98 $ 6,402 Mortgage-backed securities of government agencies 589 27,243 — — 589 27,243 Asset-backed securities of government agencies — — 46 1,266 46 1,266 State and political subdivisions 439 19,328 — — 439 19,328 Corporate bonds 33 3,593 111 1,889 144 5,482 Held-to-maturity U.S. Government agencies 396 8,602 — — 396 8,602 Mortgage-backed securities of government agencies 28 2,018 173 3,621 201 5,639 Total temporarily impaired securities $ 1,583 $ 67,186 $ 330 $ 6,776 $ 1,913 $ 73,962 There were forty-six

Loans

Loans	9 Months Ended
	Sep. 30, 2017
Receivables [Abstract]
Loans	NOTE 3 – LOANS Loans consist of the following: (Dollars in thousands) September 30, 2017 December 31, 2016 Commercial $ 137,459 $ 134,268 Commercial real estate 177,588 159,475 Residential real estate 153,281 144,489 Construction & land development 23,915 23,428 Consumer 16,686 13,308 Total loans before deferred costs 508,929 474,968 Deferred loan costs 529 481 Total Loans $ 509,458 $ 475,449 Loan Origination/Risk Management The Company has certain lending policies and procedures in place that are designed to maximize loan income within an acceptable level of risk. Management reviews and approves these policies and procedures on a regular basis. A reporting system supplements the review process by providing management with frequent reports related to loan production, loan quality, concentrations of credit, loan delinquencies and non-performing Commercial loans are underwritten after evaluating and understanding the borrower’s ability to operate profitably and prudently expand its business. Underwriting standards are designed to promote relationship banking rather than transactional banking. The Company’s management examines current and occasionally projected cash flows to determine the ability of the borrower to repay their obligations as agreed. Commercial loans are primarily made based on the identified cash flows of the borrower and secondarily on the underlying collateral provided by the borrower. The cash flows of borrowers; however, may not be as expected and the collateral securing these loans may fluctuate in value. Most commercial loans are secured by the assets being financed or other business assets such as accounts receivable or inventory and may incorporate a personal guarantee; however, some short-term loans may be made on an unsecured basis. In the case of loans secured by accounts receivable, the availability of funds for the repayment of these loans may be substantially dependent on the ability of the borrower to collect amounts due from its customers. Commercial real estate loans are subject to underwriting standards and processes similar to commercial loans, in addition to those of real estate loans. These loans are viewed primarily as cash flow loans and secondarily as loans secured by real estate. Commercial real estate lending typically involves higher loan principal amounts and the repayment of these loans is largely dependent on the successful operation of the property securing the loan or the business conducted on the property securing the loan. Commercial real estate loans may be adversely affected by conditions in the real estate markets or in the general economy. The properties securing the Company’s commercial real estate portfolio are diverse in terms of type. This diversity helps reduce the Company’s exposure to adverse economic events that affect any single industry. Management monitors and evaluates commercial real estate loans based on collateral, geography, and risk grade criteria. In addition, management tracks the level of owner-occupied commercial real estate loans versus non-owner With respect to loans to developers and builders that are secured by non-owner Construction and land development loans often involve the disbursement of substantial funds with repayment substantially dependent on the success of the ultimate project. Sources of repayment for these types of loans may be pre-committed on-site The Company originates consumer loans utilizing a judgmental underwriting process. To monitor and manage consumer loan risk, policies and procedures are developed and modified, as needed, jointly by line and staff personnel. This activity, coupled with relatively small loan amounts that are spread across many individual borrowers, minimizes risk. The Company maintains an independent loan review department that reviews and validates the credit risk program on a periodic basis. Results of these reviews are presented to management. The loan review process complements and reinforces the risk identification and assessment decisions made by lenders and credit personnel, as well as the Company’s policies and procedures. Loans serviced for others approximated $79.8 million and $85.9 million at September 30, 2017 and December 31, 2016, respectively. Concentrations of Credit Nearly all of the Company’s lending activity occurs within the state of Ohio, including the four (4) counties of Holmes, Stark, Tuscarawas and Wayne, as well as other markets. The majority of the Company’s loan portfolio consists of commercial and commercial real estate loans. As of September 30, 2017 and December 31, 2016, there were no concentrations of loans related to any single industry. Allowance for Loan Losses The following tables detail activity in the allowance for loan losses by portfolio segment for the three and nine months ended September 30, 2017 and 2016. Allocation of a portion of the allowance to one category of loans does not preclude its availability to absorb losses in other categories. The increase in the provision for loan losses for the three months ended September 30, 2017 related to commercial loans was primarily due to the increase in historical losses of loans in this category. The decrease in the provision related to commercial real estate loans was due to the decrease in the specific impairment amount related to one loan relationship. The decrease in the provision related to residential real estate loans is due to the decrease of loan delinquencies in this category. The increase in the provision for loan losses related to commercial loans for the nine months ended September 30, 2017 was due to the increase in the historical loss rate and the increase of special mention loans in this category. The increase in the provision related to commercial real estate loans was due to the increase in nonaccrual loans in this category and the increase of adversely classified loan balances. The changes in the provision for loan losses for the three and nine months ended September 30, 2016 related to commercial loans were primarily due to charge-offs of loans in this category as well as an increase in the specific reserve for one commercial relationship. The decrease in the provision related to commercial real estate loans for the nine month period in 2016 was primarily due to a recovery of a prior charge-off. Summary of Allowance for Loan Losses (Dollars in thousands) Commercial Commercial Residential Construction & Land Consumer Unallocated Total Three months ended September 30, 2017 Beginning balance $ 2,362 $ 1,718 $ 1,264 $ 222 $ 182 $ 541 $ 6,289 Provision for loan losses 881 (88 ) (53 ) 21 (5 ) (476 ) 280 Charge-offs (1,138 ) — — — — (1,138 ) Recoveries 4 — — — 1 5 Net charge-offs (1,134 ) — — — 1 (1,133 ) Ending balance $ 2,109 $ 1,630 $ 1,211 $ 243 $ 178 $ 65 $ 5,436 Nine months ended September 30, 2017 Beginning balance $ 2,207 $ 1,264 $ 1,189 $ 178 $ 141 $ 312 $ 5,291 Provision for loan losses 725 366 14 65 42 (247 ) 965 Charge-offs (1,178 ) — — — (7 ) (1,185 ) Recoveries 355 — 8 — 2 365 Net charge-offs (823 ) — 8 — (5 ) (820 ) Ending balance $ 2,109 $ 1,630 $ 1,211 $ 243 $ 178 $ 65 $ 5,436 Three months ended September 30, 2016 Beginning balance $ 2,376 $ 1,262 $ 1,095 $ 127 $ 110 $ 186 $ 5,156 Provision for loan losses 77 63 50 24 74 (124 ) 164 Charge-offs (261 ) (38 ) — — (47 ) (346 ) Recoveries 27 — 1 — — 28 Net charge-offs (234 ) (38 ) 1 — (47 ) (318 ) Ending balance $ 2,219 $ 1,287 $ 1,146 $ 151 $ 137 $ 62 $ 5,002 Nine months ended September 30, 2016 Beginning balance $ 1,664 $ 1,271 $ 1,086 $ 123 $ 86 $ 432 $ 4,662 Provision for loan losses 797 (117 ) 57 28 98 (370 ) 493 Charge-offs (276 ) (50 ) — — (48 ) (374 ) Recoveries 34 183 3 — 1 221 Net charge-offs (242 ) 133 3 — (47 ) (153 ) Ending balance $ 2,219 $ 1,287 $ 1,146 $ 151 $ 137 $ 62 $ 5,002 The following table presents the balance in the allowance for loan losses and the ending loan balances by portfolio class and based on the impairment method as of September 30, 2017 and December 31, 2016: (Dollars in thousands) Commercial Commercial Residential Construction Consumer Unallocated Total September 30, 2017 Allowance for loan losses: Individually evaluated for impairment $ 5 $ 20 $ 24 $ — $ — $ — $ 49 Collectively evaluated for impairment 2,104 1,610 1,187 243 178 65 5,387 Total ending allowance balance $ 2,109 $ 1,630 $ 1,211 $ 243 $ 178 $ 65 $ 5,436 Loans: Loans individually evaluated for impairment $ 1,241 $ 3,703 $ 1,486 $ — $ — $ 6,430 Loans collectively evaluated for impairment 136,218 173,885 151,795 23,915 16,686 502,499 Total ending loans balance $ 137,459 $ 177,588 $ 153,281 $ 23,915 $ 16,686 $ 508,929 December 31, 2016 Allowance for loan losses: Individually evaluated for impairment $ 705 $ — $ 24 $ — $ — $ — $ 729 Collectively evaluated for impairment 1,502 1,264 1,165 178 141 312 4,562 Total ending allowance balance $ 2,207 $ 1,264 $ 1,189 $ 178 $ 141 $ 312 $ 5,291 Loans: Loans individually evaluated for impairment $ 5,028 $ 621 $ 1,507 $ — $ — $ 7,156 Loans collectively evaluated for impairment 129,240 158,854 142,982 23,428 13,308 467,812 Total ending loans balance $ 134,268 $ 159,475 $ 144,489 $ 23,428 $ 13,308 $ 474,968 The following table presents loans individually evaluated for impairment by class of loans as of September 30, 2017 and December 31, 2016: (Dollars in thousands) Unpaid Recorded Recorded Total Related September 30, 2017 Commercial $ 2,868 $ 1,238 $ 5 $ 1,243 $ 5 Commercial real estate 3,901 3,653 51 3,704 20 Residential real estate 1,667 1,095 392 1,487 24 Total impaired loans $ 8,436 $ 5,986 $ 448 $ 6,434 $ 49 December 31, 2016 Commercial $ 5,476 $ 1,690 $ 3,354 $ 5,044 $ 705 Commercial real estate 796 600 21 621 — Residential real estate 1,681 1,036 472 1,508 24 Total impaired loans $ 7,953 $ 3,326 $ 3,847 $ 7,173 $ 729 The following table presents the average recorded investment in impaired loans and related interest income recognized for the periods indicated. Three months Nine months (Dollars in thousands) 2017 2016 2017 2016 Average recorded investment: Commercial $ 3,084 $ 6,389 $ 3,376 $ 6,393 Commercial real estate 4,712 660 2,934 799 Residential real estate 1,370 1,460 1,471 1,504 Average recorded investment in impaired loans $ 9,166 $ 8,509 $ 7,781 $ 8,696 Interest income recognized: Commercial $ 10 $ 54 $ 41 $ 176 Commercial real estate 7 3 9 9 Residential real estate 13 15 43 44 Interest income recognized on a cash basis on impaired loans $ 30 $ 72 $ 93 $ 229 The following table presents the aging of past due loans and nonaccrual loans as of September 30, 2017 and December 31, 2016 by class of loans: (Dollars in thousands) Current 30 - 59 60 - 89 90 Days + Non- Total Past Non- Total Loans September 30, 2017 Commercial $ 136,544 $ 28 $ — $ 144 $ 743 $ 915 $ 137,459 Commercial real estate 173,989 160 — 40 3,399 3,599 177,588 Residential real estate 151,684 914 108 68 507 1,597 153,281 Construction & land development 23,915 — — — — — 23,915 Consumer 16,561 87 9 1 28 125 16,686 Total Loans $ 502,693 $ 1,189 $ 117 $ 253 $ 4,677 $ 6,236 $ 508,929 December 31, 2016 Commercial $ 133,630 $ 151 $ 62 $ — $ 425 $ 638 $ 134,268 Commercial real estate 158,504 435 — 39 497 971 159,475 Residential real estate 142,926 816 61 196 490 1,563 144,489 Construction & land development 23,428 — — — — — 23,428 Consumer 13,234 21 16 — 37 74 13,308 Total Loans $ 471,722 $ 1,423 $ 139 $ 235 $ 1,449 $ 3,246 $ 474,968 Troubled Debt Restructurings All troubled debt restructurings (“TDR’s) are individually evaluated for impairment and a related allowance is recorded, as needed. Loans whose terms have been modified as TDR’s totaled $3.1 million as of September 30, 2017, and $6.4 million as of December 31, 2016, with $24 thousand and $711 thousand of specific reserves allocated to those loans, respectively. At September 30, 2017, $2.0 million of the loans classified as TDR’s were performing in accordance with their modified terms. Of the remaining $1.1 million, all were in nonaccrual of interest status. The Company held no foreclosed real estate as of September 30, 2017, or December 31, 2016. Consumer mortgage loans in the process of foreclosure were $154 thousand at September 30, 2017 and $448 thousand at December 31, 2016. The following table presents loans restructured during the three and nine month periods ended September 30, 2017 and 2016. (Dollars in thousands) Number of Pre- Post- For the three months ended September 30, 2017 Residential Real Estate 1 $ 38 $ 38 Total Restructured Loans 1 $ 38 $ 38 For the nine months ended September 30, 2017 Commercial Real Estate 4 $ 288 $ 288 Residential Real Estate 2 52 52 Total Restructured Loans 6 $ 340 $ 340 For the three months ended September 30, 2016 Residential Real Estate — $ — $ — Total Restructured Loans — $ — $ — For the nine months ended September 30, 2016 Residential Real Estate 3 $ 327 $ 327 Total Restructured Loans 3 $ 327 $ 327 The restructured loans were modified by changing the monthly payment to interest only. No principal reductions were made. There was one commercial loan in the amount of $3.3 million that was restructured in the fourth quarter of 2016 that has defaulted in 2017. None of the loans that were restructured in 2015 have subsequently defaulted in the nine month period ended September 30, 2016. Credit Quality Indicators The Company categorizes loans into risk categories based on relevant information about the ability of borrowers to service their debt such as: current financial information, historical payment experience, credit documentation, public information, and current economic trends, among other factors. The Company analyzes commercial loans individually by classifying the loans as to credit risk. This analysis includes commercial loans with an outstanding balance greater than $300 thousand. This analysis is performed on an annual basis. The Company uses the following definitions for risk ratings: Pass Special Mention Substandard Doubtful Loans not meeting the criteria above that are analyzed individually as part of the above described process are considered to be pass rated loans. Loans listed as not rated are either less than $300 thousand or are included in groups of homogeneous loans. Based on the most recent analysis performed, the risk category of loans by class is as follows as of September 30, 2017 and December 31, 2016: (Dollars in thousands) Pass Special Substandard Doubtful Not Rated Total September 30, 2017 Commercial $ 115,301 $ 16,167 $ 5,130 $ — $ 861 $ 137,459 Commercial real estate 160,677 9,933 6,744 — 234 177,588 Residential real estate 208 — 183 — 152,890 153,281 Construction & land development 18,171 1,410 — — 4,334 23,915 Consumer — — — — 16,686 16,686 Total $ 294,357 $ 27,510 $ 12,057 $ — $ 175,005 $ 508,929 December 31, 2016 Commercial $ 116,739 $ 6,874 $ 9,704 $ — $ 951 $ 134,268 Commercial real estate 149,630 4,168 4,766 — 911 159,475 Residential real estate 216 — 175 — 144,098 144,489 Construction & land development 17,183 981 504 — 4,760 23,428 Consumer — — — — 13,308 13,308 Total $ 283,768 $ 12,023 $ 15,149 $ — $ 164,028 $ 474,968 The following table presents loans that are not rated by class of loans as of September 30, 2017 and December 31, 2016. Nonperforming loans include loans past due 90 days or more and loans on nonaccrual of interest status. (Dollars in thousands) Performing Non-Performing Total September 30, 2017 Commercial $ 861 $ — $ 861 Commercial real estate 234 — 234 Residential real estate 152,315 575 152,890 Construction & land development 4,334 — 4,334 Consumer 16,657 29 16,686 Total $ 174,401 $ 604 $ 175,005 December 31, 2016 Commercial $ 951 $ — $ 951 Commercial real estate 911 — 911 Residential real estate 143,440 658 144,098 Construction & land development 4,760 — 4,760 Consumer 13,271 37 13,308 Total $ 163,333 $ 695 $ 164,028

Short-Term Borrowings

Short-Term Borrowings	9 Months Ended
	Sep. 30, 2017
Debt Disclosure [Abstract]
Short-Term Borrowings	NOTE 4 – SHORT-TERM BORROWINGS The following table provides additional detail regarding repurchase agreements accounted for as secured borrowings. Remaining Contractual Maturity (Dollars in thousands) September 30, December 31, Securities of U.S. Government Agencies and mortgage-backed securities of government agencies pledged, fair value $ 45,234 $ 48,866 Repurchase agreements 45,057 48,742

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurements	NOTE 5 – FAIR VALUE MEASUREMENTS The Company provides disclosures about assets and liabilities carried at fair value. The framework provides a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities and lowest priority to unobservable inputs. The three broad levels of the fair value hierarchy are described below: Level I: Inputs to the valuation methodology are unadjusted quoted prices for identical assets or liabilities in active markets that the Company has the ability to access. Level II: Inputs to the valuation methodology include quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar assets or liabilities in inactive markets; inputs other than quoted prices that are observable for the asset or liability; and inputs that are derived principally from or corroborated by observable market data by corroborated or other means. If the asset or liability has a specified (contractual) term, the Level II input must be observable for substantially the full term of the asset or liability. Level III: Inputs to the valuation methodology are unobservable and significant to the fair value measurement. The following table presents the assets reported on the Consolidated Balance Sheets at their fair value as of September 30, 2017 and December 31, 2016 by level within the fair value hierarchy. No liabilities are carried at fair value. Financial assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. Equity securities and U.S. Treasury Notes are valued at the closing price reported on the active market on which the individual securities are traded. Obligations of U.S. government agencies, mortgage-backed securities, asset-backed securities, obligations of states and political subdivisions and corporate bonds are valued at observable market data for similar assets. (Dollars in thousands) Level I Level II Level III Total September 30, 2017 Assets: Securities available-for-sale U.S. Treasury security $ 998 $ — $ — $ 998 U.S. Government agencies — 8,300 — 8,300 Mortgage-backed securities of government agencies — 50,506 — 50,506 Asset-backed securities of government agencies — 1,194 — 1,194 State and political subdivisions — 27,477 — 27,477 Corporate bonds — 9,483 — 9,483 Total debt securities 998 96,960 — 97,958 Equity securities 90 — — 90 Total available-for-sale $ 1,088 $ 96,960 $ — $ 98,048 December 31, 2016 Assets: Securities available-for-sale U.S. Treasury security $ 1,001 $ — $ — $ 1,001 U.S. Government agencies — 6,402 — 6,402 Mortgage-backed securities of government agencies — 55,837 — 55,837 Other mortgage-backed securities — 65 — 65 Asset-backed securities of government agencies — 1,266 — 1,266 State and political subdivisions — 29,708 — 29,708 Corporate bonds — 9,516 — 9,516 Total debt securities 1,001 102,794 — 103,795 Equity securities 80 — — 80 Total available-for-sale $ 1,081 $ 102,794 $ — $ 103,875 The following table presents the assets measured on a nonrecurring basis on the Consolidated Balance Sheets at their fair value as of September 30, 2017 and December 31, 2016, by level within the fair value hierarchy. Impaired loans are written down to fair value through the establishment of specific reserves. Techniques used to value the collateral that secure the impaired loans include: quoted market prices for identical assets classified as Level I inputs; and observable inputs, employed by certified appraisers, for similar assets classified as Level II inputs. In cases where valuation techniques included inputs that are unobservable and are based on estimates and assumptions developed by management based on the best information available under each circumstance, the asset valuation is classified as Level III inputs. (Dollars in thousands) Level I Level II Level III Total September 30, 2017 Assets measured on a nonrecurring basis: Impaired loans $ — $ — $ 6,381 $ 6,381 December 31, 2016 Assets measured on a nonrecurring basis: Impaired loans $ — $ — $ 6,427 $ 6,427 The following table presents additional quantitative information about assets measured at fair value on a nonrecurring basis and for which the Company has utilized Level III inputs to determine fair value: Quantitative Information about Level III Fair Value Measurements Fair Value Valuation Unobservable Input Range (Weighted Average) (Dollars in thousands) September 30, 2017 Impaired loans $ 2,120 Discounted cash flow Remaining term Discount rate 7 mo to 29.8 yrs (182 months) 3.5% to 9.8% (4.9%) 4,261 Appraisal of collateral (1) Appraisal adjustments (2) Liquidation expense (2) 0% to -25% (-20%) -10% December 31, 2016 Impaired loans $ 5,330 Discounted cash flow Remaining term Discount rate 6 mos to 29.9 yrs / (61.1 mos) 3.1% to 12.0% / (4.9%) 1,097 Appraisal of collateral (1) Appraisal adjustments (2) Liquidation expense (2) 0% to -50% (-21.7%) -10% (1) Fair value is generally determined through independent appraisals of the underlying collateral, which generally include various inputs which are not identifiable. (2) Appraisals may be adjusted by management for qualitative factors. The range of liquidation expenses and other appraisal adjustments are presented as a percent of the appraisal.

Fair Values of Financial Instru

Fair Values of Financial Instruments	9 Months Ended
	Sep. 30, 2017
Investments, All Other Investments [Abstract]
Fair Values of Financial Instruments	NOTE 6 – FAIR VALUES OF FINANCIAL INSTRUMENTS The estimated fair values of recognized financial instruments as of September 30, 2017 and December 31, 2016 are as follows: (Dollars in thousands) Carrying Level I Level II Level III Fair Value September 30, 2017 Financial assets Cash and cash equivalents $ 45,372 $ 45,372 $ — $ — $ 45,372 Securities available-for-sale 98,048 1,088 96,960 — 98,048 Securities held-to-maturity 26,475 — 26,431 — 26,431 Restricted stock 4,614 4,614 — — 4,614 Loans held for sale 1,108 1,108 — — 1,108 Net loans 504,022 — — 507,303 507,303 Bank-owned life insurance 13,131 13,131 — — 13,131 Accrued interest receivable 1,701 1,701 — — 1,701 Mortgage servicing rights 266 — — 266 266 Financial liabilities Deposits $ 571,626 $ 459,054 $ — $ 112,960 $ 572,014 Short-term borrowings 45,057 45,057 — — 45,057 Other borrowings 21,596 — — 20,734 20,734 Accrued interest payable 92 92 — — 92 December 31, 2016 Financial assets Cash and cash equivalents $ 36,838 $ 36,838 $ — $ — $ 36,838 Securities available-for-sale 103,875 1,081 102,794 — 103,875 Securities held-to-maturity 23,883 — 23,444 — 23,444 Restricted stock 4,614 4,614 — — 4,614 Net loans 470,158 — — 471,815 471,815 Bank-owned life insurance 10,361 10,361 — — 10,361 Accrued interest receivable 1,409 1,409 — — 1,409 Mortgage servicing rights 261 — — 261 261 Financial liabilities Deposits $ 540,785 $ 428,676 $ — $ 112,642 $ 541,318 Short-term borrowings 48,742 48,742 — — 48,742 Other borrowings 12,385 — — 12,511 12,511 Accrued interest payable 76 76 — — 76 For purposes of the above disclosures of estimated fair value, the following assumptions are used: Cash and cash equivalents; Loans held for sale; Accrued interest receivable; Short-term borrowings and Accrued interest payable The fair value of the above instruments is considered to be carrying value, classified as Level I in the fair value hierarchy. Securities The fair value of securities available-for-sale held-to-maturity Net loans The fair value for loans is estimated by discounting future cash flows using current market inputs at which loans with similar terms and qualities would be made to borrowers of similar credit quality. Where quoted market prices were available, primarily for certain residential mortgage loans, such market rates were utilized as estimates for fair value. Fair value of non-accrual Bank-owned life insurance The carrying amount of bank-owned life insurance is based on the cash surrender value of the policies and is a reasonable estimate of fair value, classified as Level I. Restricted stock Restricted stock includes Federal Home Loan Bank Stock and Federal Reserve Bank Stock. It is not practicable to determine the fair value of regulatory equity securities due to restrictions placed on their transferability. Fair value is based on carrying value, classified as Level I. Mortgage servicing rights The fair value of mortgage servicing rights is based on a valuation model that calculates the present value of estimated net servicing income. The valuation model incorporates discounted cash flow and repayment assumptions based on management’s best judgment, classified as Level III. Deposits The fair value of certificates of deposit is based on the discounted value of contractual cash flows. The discount rates are estimated using market rates currently offered for similar instruments with similar remaining maturities, resulting in a Level III classification. Demand, savings, and money market deposit accounts are valued at the amount payable on demand as of quarter end, resulting in a Level I classification. Other borrowings The fair value of Federal Home Loan Bank advances are estimated using a discounted cash flow analysis based on the current borrowing rates for similar types of borrowings, resulting in a Level III classification. The Company also has unrecognized financial instruments at September 30, 2017 and December 31, 2016. These financial instruments relate to commitments to extend credit and letters of credit. The aggregated contract amount of such financial instruments was approximately $177.8 million at September 30, 2017 and $163.7 million at December 31, 2016. Such amounts are also considered to be the fair values. The fair value estimates of financial instruments are made at a specific point in time based on relevant market information. These estimates do not reflect any premium or discount that could result from offering for sale at one time the entire holdings of a particular financial instrument over the value of anticipated future business and the value of assets and liabilities that are not considered financial instruments. Since no ready market exists for a significant portion of the financial instruments, fair value estimates are largely based on judgments after considering such factors as future expected credit losses, current economic conditions, risk characteristics of various financial instruments, and other factors. These estimates are subjective in nature and involve uncertainties and matters of significant judgment and therefore, cannot be determined with precision. Changes in assumptions could significantly affect these estimates.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2017
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	NOTE 7- The following table presents the changes in accumulated other comprehensive income (loss) by component net of tax for the three and nine month periods ended September 30, 2017 and 2016: (Dollars in thousands) Pretax Tax Effect After-tax Three months ended September 30, 2017 Balance as of June 30, 2017 $ 121 $ (43 ) $ 78 Unrealized holding gain on available-for-sale (255 ) 87 (168 ) Reclassify gain included in income — — — Amortization of held-to-maturity 27 (9 ) 18 Total other comprehensive income (loss) (228 ) 78 (150 ) Balance as of September 30, 2017 $ (107 ) $ 35 $ (72 ) Nine months ended September 30, 2017 Balance as of December 31, 2016 $ (1,323 ) $ 449 $ (874 ) Unrealized holding gain on available-for-sale 1,132 (385 ) 747 Reclassify gain included in income — — — Amortization of held-to-maturity 84 (29 ) 55 Total other comprehensive income (loss) 1,216 (414 ) 802 Balance as of September 30, 2017 $ (107 ) $ 35 $ (72 ) Three months ended September 30, 2016 Balance as of June 30, 2016 $ 1,012 $ (344 ) $ 668 Unrealized holding gain on available-for-sale 128 (43 ) 85 Reclassify gain included in income (1 ) — (1 ) Amortization of held-to-maturity 175 (60 ) 115 Total other comprehensive income (loss) 302 (103 ) 199 Balance as of September 30, 2016 $ 1,314 $ (447 ) $ 867 Nine months ended September 30, 2016 Balance as of December 31, 2015 $ (631 ) $ 214 $ (417 ) Unrealized holding gain on available-for-sale 1,455 (494 ) 961 Reclassify gain included in income (1 ) — (1 ) Amortization of held-to-maturity 491 (167 ) 324 Total other comprehensive income (loss) 1,945 (661 ) 1,284 Balance as of September 30, 2016 $ 1,314 $ (447 ) $ 867

Summary of Significant Accoun16

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2017
Accounting Policies [Abstract]
Revenue Recognition	ASU 2014-09 2014-09 one-year year-end,
Financial Instruments	ASU 2016-01
Lease	ASU 2016-02 right-of-use
Credit Losses	ASU 2016-13 one-time one-time
Classification of Certain Cash Receipts and Cash Payments	ASU 2016-15
Goodwill Impairment	ASU 2017-04

Securities (Tables)

Securities (Tables)	9 Months Ended
	Sep. 30, 2017
Investments, Debt and Equity Securities [Abstract]
Summary of Securities Available-for-Sale and Restricted Stock	Securities consist of the following at September 30, 2017 and December 31, 2016: (Dollars in thousands) Amortized Gross Gross Fair value September 30, 2017 Available-for-sale U.S. Treasury security $ 999 $ — $ 1 $ 998 U.S. Government agencies 8,350 — 50 8,300 Mortgage-backed securities of government agencies 50,452 340 286 50,506 Asset-backed securities of government agencies 1,198 — 4 1,194 State and political subdivisions 27,166 385 74 27,477 Corporate bonds 9,580 70 167 9,483 Equity securities 53 37 — 90 Total available-for-sale 97,798 832 582 98,048 Held-to-maturity U.S. Government agencies 9,475 21 153 9,343 Mortgage-backed securities of government agencies 12,300 170 96 12,374 State and political subdivisions 4,700 14 — 4,714 Total held-to-maturity 26,475 205 249 26,431 Restricted stock 4,614 — — 4,614 Total securities $ 128,887 $ 1,037 $ 831 $ 129,093 December 31, 2016 Available-for-sale U.S. Treasury security $ 1,001 $ — $ — $ 1,001 U.S. Government agencies 6,500 — 98 6,402 Mortgage-backed securities of government agencies 56,187 239 589 55,837 Other mortgage-backed securities 65 — — 65 Asset-backed securities of government agencies 1,312 — 46 1,266 State and political subdivisions 30,007 140 439 29,708 Corporate bonds 9,632 28 144 9,516 Equity securities 53 27 — 80 Total available-for-sale 104,757 434 1,316 103,875 Held-to-maturity U.S. Government agencies 9,472 17 396 9,093 Mortgage-backed securities of government agencies 14,411 141 201 14,351 Total held-to-maturity 23,883 158 597 23,444 Restricted stock 4,614 — — 4,614 Total securities $ 133,254 $ 592 $ 1,913 $ 131,933
Summary of Amortized Cost and Fair Value of Debt Securities	The amortized cost and fair value of debt securities at September 30, 2017, by contractual maturity, are shown below. Actual maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. (Dollars in thousands) Amortized Fair value Available-for-sale Due in one year or less $ 3,190 $ 3,208 Due after one through five years 18,798 18,917 Due after five through ten years 26,083 26,271 Due after ten years 49,674 49,562 Total debt securities available-for-sale $ 97,745 $ 97,958 Held-to-maturity Due in one year or less $ 4,700 $ 4,714 Due after one through five years 477 498 Due after five through ten years 3,000 2,914 Due after ten years 18,298 18,305 Total debt securities held-to-maturity $ 26,475 $ 26,431
Summary of Gross Unrealized Losses and Fair Value of Available for Sale Securities	The following table presents gross unrealized losses and fair value of securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, at September 30, 2017 and December 31, 2016: Securities in a continuous unrealized loss position Less than 12 months 12 months or more Total (Dollars in thousands) Gross Fair Gross Fair Gross Fair September 30, 2017 Available-for-sale U.S. Treasury security $ 1 $ 998 $ — $ — $ 1 $ 998 U.S. Government agencies 10 3,840 40 4,460 50 8,300 Mortgage-backed securities of government agencies 245 20,128 41 2,316 286 22,444 Asset-backed securities of government agencies — — 4 1,194 4 1,194 State and political subdivisions 9 1,693 65 2,961 74 4,654 Corporate bonds — — 167 2,333 167 2,333 Held-to-maturity U.S. Government agencies 32 3,966 121 4,879 153 8,845 Mortgage-backed securities of government agencies 3 2,011 93 3,274 96 5,285 Total temporarily impaired securities $ 300 $ 32,636 $ 531 $ 21,417 $ 831 $ 54,053 December 31, 2016 Available-for-sale U.S. Government agencies $ 98 $ 6,402 $ — $ — $ 98 $ 6,402 Mortgage-backed securities of government agencies 589 27,243 — — 589 27,243 Asset-backed securities of government agencies — — 46 1,266 46 1,266 State and political subdivisions 439 19,328 — — 439 19,328 Corporate bonds 33 3,593 111 1,889 144 5,482 Held-to-maturity U.S. Government agencies 396 8,602 — — 396 8,602 Mortgage-backed securities of government agencies 28 2,018 173 3,621 201 5,639 Total temporarily impaired securities $ 1,583 $ 67,186 $ 330 $ 6,776 $ 1,913 $ 73,962

Loans (Tables)

Loans (Tables)	9 Months Ended
	Sep. 30, 2017
Receivables [Abstract]
Summary of Loans	Loans consist of the following: (Dollars in thousands) September 30, 2017 December 31, 2016 Commercial $ 137,459 $ 134,268 Commercial real estate 177,588 159,475 Residential real estate 153,281 144,489 Construction & land development 23,915 23,428 Consumer 16,686 13,308 Total loans before deferred costs 508,929 474,968 Deferred loan costs 529 481 Total Loans $ 509,458 $ 475,449
Schedule of Allowances for Loan Losses by Portfolio Segment	The following tables detail activity in the allowance for loan losses by portfolio segment for the three and nine months ended September 30, 2017 and 2016. (Dollars in thousands) Commercial Commercial Residential Construction & Land Consumer Unallocated Total Three months ended September 30, 2017 Beginning balance $ 2,362 $ 1,718 $ 1,264 $ 222 $ 182 $ 541 $ 6,289 Provision for loan losses 881 (88 ) (53 ) 21 (5 ) (476 ) 280 Charge-offs (1,138 ) — — — — (1,138 ) Recoveries 4 — — — 1 5 Net charge-offs (1,134 ) — — — 1 (1,133 ) Ending balance $ 2,109 $ 1,630 $ 1,211 $ 243 $ 178 $ 65 $ 5,436 Nine months ended September 30, 2017 Beginning balance $ 2,207 $ 1,264 $ 1,189 $ 178 $ 141 $ 312 $ 5,291 Provision for loan losses 725 366 14 65 42 (247 ) 965 Charge-offs (1,178 ) — — — (7 ) (1,185 ) Recoveries 355 — 8 — 2 365 Net charge-offs (823 ) — 8 — (5 ) (820 ) Ending balance $ 2,109 $ 1,630 $ 1,211 $ 243 $ 178 $ 65 $ 5,436 Three months ended September 30, 2016 Beginning balance $ 2,376 $ 1,262 $ 1,095 $ 127 $ 110 $ 186 $ 5,156 Provision for loan losses 77 63 50 24 74 (124 ) 164 Charge-offs (261 ) (38 ) — — (47 ) (346 ) Recoveries 27 — 1 — — 28 Net charge-offs (234 ) (38 ) 1 — (47 ) (318 ) Ending balance $ 2,219 $ 1,287 $ 1,146 $ 151 $ 137 $ 62 $ 5,002 Nine months ended September 30, 2016 Beginning balance $ 1,664 $ 1,271 $ 1,086 $ 123 $ 86 $ 432 $ 4,662 Provision for loan losses 797 (117 ) 57 28 98 (370 ) 493 Charge-offs (276 ) (50 ) — — (48 ) (374 ) Recoveries 34 183 3 — 1 221 Net charge-offs (242 ) 133 3 — (47 ) (153 ) Ending balance $ 2,219 $ 1,287 $ 1,146 $ 151 $ 137 $ 62 $ 5,002
Allowances for Loan Losses and Ending Balances by Portfolio Class and Based on Impairment Method	The following table presents the balance in the allowance for loan losses and the ending loan balances by portfolio class and based on the impairment method as of September 30, 2017 and December 31, 2016: (Dollars in thousands) Commercial Commercial Residential Construction Consumer Unallocated Total September 30, 2017 Allowance for loan losses: Individually evaluated for impairment $ 5 $ 20 $ 24 $ — $ — $ — $ 49 Collectively evaluated for impairment 2,104 1,610 1,187 243 178 65 5,387 Total ending allowance balance $ 2,109 $ 1,630 $ 1,211 $ 243 $ 178 $ 65 $ 5,436 Loans: Loans individually evaluated for impairment $ 1,241 $ 3,703 $ 1,486 $ — $ — $ 6,430 Loans collectively evaluated for impairment 136,218 173,885 151,795 23,915 16,686 502,499 Total ending loans balance $ 137,459 $ 177,588 $ 153,281 $ 23,915 $ 16,686 $ 508,929 December 31, 2016 Allowance for loan losses: Individually evaluated for impairment $ 705 $ — $ 24 $ — $ — $ — $ 729 Collectively evaluated for impairment 1,502 1,264 1,165 178 141 312 4,562 Total ending allowance balance $ 2,207 $ 1,264 $ 1,189 $ 178 $ 141 $ 312 $ 5,291 Loans: Loans individually evaluated for impairment $ 5,028 $ 621 $ 1,507 $ — $ — $ 7,156 Loans collectively evaluated for impairment 129,240 158,854 142,982 23,428 13,308 467,812 Total ending loans balance $ 134,268 $ 159,475 $ 144,489 $ 23,428 $ 13,308 $ 474,968
Schedule of Impairment by Class of Loans	The following table presents loans individually evaluated for impairment by class of loans as of September 30, 2017 and December 31, 2016: (Dollars in thousands) Unpaid Recorded Recorded Total Related September 30, 2017 Commercial $ 2,868 $ 1,238 $ 5 $ 1,243 $ 5 Commercial real estate 3,901 3,653 51 3,704 20 Residential real estate 1,667 1,095 392 1,487 24 Total impaired loans $ 8,436 $ 5,986 $ 448 $ 6,434 $ 49 December 31, 2016 Commercial $ 5,476 $ 1,690 $ 3,354 $ 5,044 $ 705 Commercial real estate 796 600 21 621 — Residential real estate 1,681 1,036 472 1,508 24 Total impaired loans $ 7,953 $ 3,326 $ 3,847 $ 7,173 $ 729
Schedule of Average Recorded Investment in Impaired Loans and Related Interest Income Recognized	The following table presents the average recorded investment in impaired loans and related interest income recognized for the periods indicated. Three months Nine months (Dollars in thousands) 2017 2016 2017 2016 Average recorded investment: Commercial $ 3,084 $ 6,389 $ 3,376 $ 6,393 Commercial real estate 4,712 660 2,934 799 Residential real estate 1,370 1,460 1,471 1,504 Average recorded investment in impaired loans $ 9,166 $ 8,509 $ 7,781 $ 8,696 Interest income recognized: Commercial $ 10 $ 54 $ 41 $ 176 Commercial real estate 7 3 9 9 Residential real estate 13 15 43 44 Interest income recognized on a cash basis on impaired loans $ 30 $ 72 $ 93 $ 229
Schedule of Aging of Past Due and Nonaccrual Loans	The following table presents the aging of past due loans and nonaccrual loans as of September 30, 2017 and December 31, 2016 by class of loans: (Dollars in thousands) Current 30 - 59 60 - 89 90 Days + Non- Total Past Non- Total Loans September 30, 2017 Commercial $ 136,544 $ 28 $ — $ 144 $ 743 $ 915 $ 137,459 Commercial real estate 173,989 160 — 40 3,399 3,599 177,588 Residential real estate 151,684 914 108 68 507 1,597 153,281 Construction & land development 23,915 — — — — — 23,915 Consumer 16,561 87 9 1 28 125 16,686 Total Loans $ 502,693 $ 1,189 $ 117 $ 253 $ 4,677 $ 6,236 $ 508,929 December 31, 2016 Commercial $ 133,630 $ 151 $ 62 $ — $ 425 $ 638 $ 134,268 Commercial real estate 158,504 435 — 39 497 971 159,475 Residential real estate 142,926 816 61 196 490 1,563 144,489 Construction & land development 23,428 — — — — — 23,428 Consumer 13,234 21 16 — 37 74 13,308 Total Loans $ 471,722 $ 1,423 $ 139 $ 235 $ 1,449 $ 3,246 $ 474,968
Summary of Troubled Debt Restructurings	The following table presents loans restructured during the three and nine month periods ended September 30, 2017 and 2016. (Dollars in thousands) Number of Pre- Post- For the three months ended September 30, 2017 Residential Real Estate 1 $ 38 $ 38 Total Restructured Loans 1 $ 38 $ 38 For the nine months ended September 30, 2017 Commercial Real Estate 4 $ 288 $ 288 Residential Real Estate 2 52 52 Total Restructured Loans 6 $ 340 $ 340 For the three months ended September 30, 2016 Residential Real Estate — $ — $ — Total Restructured Loans — $ — $ — For the nine months ended September 30, 2016 Residential Real Estate 3 $ 327 $ 327 Total Restructured Loans 3 $ 327 $ 327
Summary of Loans by Credit Quality Indicator	Based on the most recent analysis performed, the risk category of loans by class is as follows as of September 30, 2017 and December 31, 2016: (Dollars in thousands) Pass Special Substandard Doubtful Not Rated Total September 30, 2017 Commercial $ 115,301 $ 16,167 $ 5,130 $ — $ 861 $ 137,459 Commercial real estate 160,677 9,933 6,744 — 234 177,588 Residential real estate 208 — 183 — 152,890 153,281 Construction & land development 18,171 1,410 — — 4,334 23,915 Consumer — — — — 16,686 16,686 Total $ 294,357 $ 27,510 $ 12,057 $ — $ 175,005 $ 508,929 December 31, 2016 Commercial $ 116,739 $ 6,874 $ 9,704 $ — $ 951 $ 134,268 Commercial real estate 149,630 4,168 4,766 — 911 159,475 Residential real estate 216 — 175 — 144,098 144,489 Construction & land development 17,183 981 504 — 4,760 23,428 Consumer — — — — 13,308 13,308 Total $ 283,768 $ 12,023 $ 15,149 $ — $ 164,028 $ 474,968
Schedule of Loans Not Rated by Class of Loans	The following table presents loans that are not rated by class of loans as of September 30, 2017 and December 31, 2016. Nonperforming loans include loans past due 90 days or more and loans on nonaccrual of interest status. (Dollars in thousands) Performing Non-Performing Total September 30, 2017 Commercial $ 861 $ — $ 861 Commercial real estate 234 — 234 Residential real estate 152,315 575 152,890 Construction & land development 4,334 — 4,334 Consumer 16,657 29 16,686 Total $ 174,401 $ 604 $ 175,005 December 31, 2016 Commercial $ 951 $ — $ 951 Commercial real estate 911 — 911 Residential real estate 143,440 658 144,098 Construction & land development 4,760 — 4,760 Consumer 13,271 37 13,308 Total $ 163,333 $ 695 $ 164,028

Short-Term Borrowings (Tables)

Short-Term Borrowings (Tables)	9 Months Ended
	Sep. 30, 2017
Debt Disclosure [Abstract]
Summary of Repurchase Agreements Accounted for as Secured Borrowings	The following table provides additional detail regarding repurchase agreements accounted for as secured borrowings. Remaining Contractual Maturity (Dollars in thousands) September 30, December 31, Securities of U.S. Government Agencies and mortgage-backed securities of government agencies pledged, fair value $ 45,234 $ 48,866 Repurchase agreements 45,057 48,742

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Schedule of Fair Value of Assets Measured on Recurring Basis	The following table presents the assets reported on the Consolidated Balance Sheets at their fair value as of September 30, 2017 and December 31, 2016 by level within the fair value hierarchy. (Dollars in thousands) Level I Level II Level III Total September 30, 2017 Assets: Securities available-for-sale U.S. Treasury security $ 998 $ — $ — $ 998 U.S. Government agencies — 8,300 — 8,300 Mortgage-backed securities of government agencies — 50,506 — 50,506 Asset-backed securities of government agencies — 1,194 — 1,194 State and political subdivisions — 27,477 — 27,477 Corporate bonds — 9,483 — 9,483 Total debt securities 998 96,960 — 97,958 Equity securities 90 — — 90 Total available-for-sale $ 1,088 $ 96,960 $ — $ 98,048 December 31, 2016 Assets: Securities available-for-sale U.S. Treasury security $ 1,001 $ — $ — $ 1,001 U.S. Government agencies — 6,402 — 6,402 Mortgage-backed securities of government agencies — 55,837 — 55,837 Other mortgage-backed securities — 65 — 65 Asset-backed securities of government agencies — 1,266 — 1,266 State and political subdivisions — 29,708 — 29,708 Corporate bonds — 9,516 — 9,516 Total debt securities 1,001 102,794 — 103,795 Equity securities 80 — — 80 Total available-for-sale $ 1,081 $ 102,794 $ — $ 103,875
Schedule of Fair Value of Assets Measured on Nonrecurring Basis	The following table presents the assets measured on a nonrecurring basis on the Consolidated Balance Sheets at their fair value as of September 30, 2017 and December 31, 2016, by level within the fair value hierarchy. (Dollars in thousands) Level I Level II Level III Total September 30, 2017 Assets measured on a nonrecurring basis: Impaired loans $ — $ — $ 6,381 $ 6,381 December 31, 2016 Assets measured on a nonrecurring basis: Impaired loans $ — $ — $ 6,427 $ 6,427
Schedule of Quantitative Information of Assets Measured at Fair Value on Nonrecurring Basis	The following table presents additional quantitative information about assets measured at fair value on a nonrecurring basis and for which the Company has utilized Level III inputs to determine fair value: Quantitative Information about Level III Fair Value Measurements Fair Value Valuation Unobservable Input Range (Weighted Average) (Dollars in thousands) September 30, 2017 Impaired loans $ 2,120 Discounted cash flow Remaining term Discount rate 7 mo to 29.8 yrs (182 months) 3.5% to 9.8% (4.9%) 4,261 Appraisal of collateral (1) Appraisal adjustments (2) Liquidation expense (2) 0% to -25% (-20%) -10% December 31, 2016 Impaired loans $ 5,330 Discounted cash flow Remaining term Discount rate 6 mos to 29.9 yrs / (61.1 mos) 3.1% to 12.0% / (4.9%) 1,097 Appraisal of collateral (1) Appraisal adjustments (2) Liquidation expense (2) 0% to -50% (-21.7%) -10% (1) Fair value is generally determined through independent appraisals of the underlying collateral, which generally include various inputs which are not identifiable. (2) Appraisals may be adjusted by management for qualitative factors. The range of liquidation expenses and other appraisal adjustments are presented as a percent of the appraisal.

Fair Values of Financial Inst21

Fair Values of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2017
Investments, All Other Investments [Abstract]
Schedule of Estimated Fair Values of Recognized Financial Instruments	The estimated fair values of recognized financial instruments as of September 30, 2017 and December 31, 2016 are as follows: (Dollars in thousands) Carrying Level I Level II Level III Fair Value September 30, 2017 Financial assets Cash and cash equivalents $ 45,372 $ 45,372 $ — $ — $ 45,372 Securities available-for-sale 98,048 1,088 96,960 — 98,048 Securities held-to-maturity 26,475 — 26,431 — 26,431 Restricted stock 4,614 4,614 — — 4,614 Loans held for sale 1,108 1,108 — — 1,108 Net loans 504,022 — — 507,303 507,303 Bank-owned life insurance 13,131 13,131 — — 13,131 Accrued interest receivable 1,701 1,701 — — 1,701 Mortgage servicing rights 266 — — 266 266 Financial liabilities Deposits $ 571,626 $ 459,054 $ — $ 112,960 $ 572,014 Short-term borrowings 45,057 45,057 — — 45,057 Other borrowings 21,596 — — 20,734 20,734 Accrued interest payable 92 92 — — 92 December 31, 2016 Financial assets Cash and cash equivalents $ 36,838 $ 36,838 $ — $ — $ 36,838 Securities available-for-sale 103,875 1,081 102,794 — 103,875 Securities held-to-maturity 23,883 — 23,444 — 23,444 Restricted stock 4,614 4,614 — — 4,614 Net loans 470,158 — — 471,815 471,815 Bank-owned life insurance 10,361 10,361 — — 10,361 Accrued interest receivable 1,409 1,409 — — 1,409 Mortgage servicing rights 261 — — 261 261 Financial liabilities Deposits $ 540,785 $ 428,676 $ — $ 112,642 $ 541,318 Short-term borrowings 48,742 48,742 — — 48,742 Other borrowings 12,385 — — 12,511 12,511 Accrued interest payable 76 76 — — 76

Accumulated Other Comprehensi22

Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2017
Equity [Abstract]
Schedule of Changes in Accumulated Other Comprehensive Income (Loss) by Component Net of Tax	The following table presents the changes in accumulated other comprehensive income (loss) by component net of tax for the three and nine month periods ended September 30, 2017 and 2016: (Dollars in thousands) Pretax Tax Effect After-tax Three months ended September 30, 2017 Balance as of June 30, 2017 $ 121 $ (43 ) $ 78 Unrealized holding gain on available-for-sale (255 ) 87 (168 ) Reclassify gain included in income — — — Amortization of held-to-maturity 27 (9 ) 18 Total other comprehensive income (loss) (228 ) 78 (150 ) Balance as of September 30, 2017 $ (107 ) $ 35 $ (72 ) Nine months ended September 30, 2017 Balance as of December 31, 2016 $ (1,323 ) $ 449 $ (874 ) Unrealized holding gain on available-for-sale 1,132 (385 ) 747 Reclassify gain included in income — — — Amortization of held-to-maturity 84 (29 ) 55 Total other comprehensive income (loss) 1,216 (414 ) 802 Balance as of September 30, 2017 $ (107 ) $ 35 $ (72 ) Three months ended September 30, 2016 Balance as of June 30, 2016 $ 1,012 $ (344 ) $ 668 Unrealized holding gain on available-for-sale 128 (43 ) 85 Reclassify gain included in income (1 ) — (1 ) Amortization of held-to-maturity 175 (60 ) 115 Total other comprehensive income (loss) 302 (103 ) 199 Balance as of September 30, 2016 $ 1,314 $ (447 ) $ 867 Nine months ended September 30, 2016 Balance as of December 31, 2015 $ (631 ) $ 214 $ (417 ) Unrealized holding gain on available-for-sale 1,455 (494 ) 961 Reclassify gain included in income (1 ) — (1 ) Amortization of held-to-maturity 491 (167 ) 324 Total other comprehensive income (loss) 1,945 (661 ) 1,284 Balance as of September 30, 2016 $ 1,314 $ (447 ) $ 867

Securities - Summary of Securit

Securities - Summary of Securities Available-for-Sale and Restricted Stock (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost, Available-for-sale	$ 97,798	$ 104,757
Gross Unrealized Gains, Available-for-sale	832	434
Gross Unrealized Losses, Available-for-sale	582	1,316
Fair Value, Available-for-sale	98,048	103,875
Amortized Cost, Held to maturity	26,475	23,883
Gross Unrealized Gains, Held to maturity	205	158
Gross Unrealized Losses, Held to maturity	249	597
Fair Value, Held to maturity	26,431	23,444
Amortized Cost	128,887	133,254
Gross Unrealized Gains	1,037	592
Gross Unrealized Losses	831	1,913
Fair Value	129,093	131,933
U.S. Government Agencies [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost, Available-for-sale	8,350	6,500
Gross Unrealized Losses, Available-for-sale	50	98
Fair Value, Available-for-sale	8,300	6,402
Amortized Cost, Held to maturity	9,475	9,472
Gross Unrealized Gains, Held to maturity	21	17
Gross Unrealized Losses, Held to maturity	153	396
Fair Value, Held to maturity	9,343	9,093
Mortgage-Backed Securities of Government Agencies [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost, Available-for-sale	50,452	56,187
Gross Unrealized Gains, Available-for-sale	340	239
Gross Unrealized Losses, Available-for-sale	286	589
Fair Value, Available-for-sale	50,506	55,837
Amortized Cost, Held to maturity	12,300	14,411
Gross Unrealized Gains, Held to maturity	170	141
Gross Unrealized Losses, Held to maturity	96	201
Fair Value, Held to maturity	12,374	14,351
State and Political Subdivisions [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost, Available-for-sale	27,166	30,007
Gross Unrealized Gains, Available-for-sale	385	140
Gross Unrealized Losses, Available-for-sale	74	439
Fair Value, Available-for-sale	27,477	29,708
Amortized Cost, Held to maturity	4,700
Gross Unrealized Gains, Held to maturity	14
Fair Value, Held to maturity	4,714
U.S. Treasury Security [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost, Available-for-sale	999	1,001
Gross Unrealized Losses, Available-for-sale	1
Fair Value, Available-for-sale	998	1,001
Other Mortgage-Backed Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost, Available-for-sale		65
Fair Value, Available-for-sale		65
Asset-Backed Securities of Government Agencies [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost, Available-for-sale	1,198	1,312
Gross Unrealized Losses, Available-for-sale	4	46
Fair Value, Available-for-sale	1,194	1,266
Corporate Bonds [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost, Available-for-sale	9,580	9,632
Gross Unrealized Gains, Available-for-sale	70	28
Gross Unrealized Losses, Available-for-sale	167	144
Fair Value, Available-for-sale	9,483	9,516
Equity Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost, Available-for-sale	53	53
Gross Unrealized Gains, Available-for-sale	37	27
Fair Value, Available-for-sale	90	80
Restricted Stock [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized Cost	4,614	4,614
Fair Value	$ 4,614	$ 4,614

Securities - Summary of Amortiz

Securities - Summary of Amortized Cost and Fair Value of Debt Securities (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Available-for-sale
Due in one year or less, Amortized Cost	$ 3,190
Due after one through five years, Amortized Cost	18,798
Due after five through ten years, Amortized Cost	26,083
Due after ten years, Amortized Cost	49,674
Total debt securities available-for-sale, Amortized Cost	97,745
Due in one year or less, Fair Value	3,208
Due after one through five years, Fair Value	18,917
Due after five through ten years, Fair Value	26,271
Due after ten years, Fair Value	49,562
Total debt securities available-for-sale, Fair Value	97,958
Held-to-maturity
Due in one year or less, Amortized Cost	4,700
Due after one through five years, Amortized Cost	477
Due after five through ten years, Amortized Cost	3,000
Due after ten years, Amortized cost	18,298
Amortized Cost, Held to maturity	26,475	$ 23,883
Due in one year or less, Fair Value	4,714
Due after one through five years, Fair Value	498
Due after five through ten years, Fair Value	2,914
Due after ten years, Fair Value	18,305
Total debt securities held-to-maturity, Fair Value	$ 26,431	$ 23,444

Securities - Additional Informa

Securities - Additional Information (Detail) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017USD ($)Securities	Sep. 30, 2017USD ($)Securities	Sep. 30, 2016USD ($)	Dec. 31, 2016USD ($)
Schedule of Available-for-sale Securities [Line Items]
Fair value of pledged securities	$ 101,000	$ 101,000		$ 95,000
Restricted stock investment in FHLB stock	4,100	4,100		4,100
Federal Reserve Bank stock	471	471		$ 471
Proceeds from sales of securities	$ 0	$ 0	$ 1
Number of securities in an unrealized loss position, Total | Securities	46	46
Number of securities in continuous unrealized loss position, 12 months or more | Securities		20
Restricted Stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Gain on conversion of stock			$ 1

Securities - Summary of Gross U

Securities - Summary of Gross Unrealized Losses and Fair Value of Available for Sale Securities (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]
Held-to-maturity, Gross Unrealized Losses, Total	$ 249	$ 597
Gross Unrealized Losses, Total	582	1,316
Gross Unrealized Losses, Less Than 12 Months	300	1,583
Fair Value, Less Than 12 Months	32,636	67,186
Gross Unrealized Losses, 12 Months Or More	531	330
Fair Value, 12 Months Or More	21,417	6,776
Gross Unrealized Losses, Total	831	1,913
Fair Value, Total	54,053	73,962
U.S. Treasury Security [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Losses, Less Than 12 Months	1
Fair Value, Less Than 12 Months	998
Gross Unrealized Losses, Total	1
Fair Value, Total	998
U.S. Government Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Held-to-maturity, Gross Unrealized Losses, Less Than 12 Months	32	396
Held-to-maturity, Fair Value, Less Than 12 Months	3,966	8,602
Held-to-maturity, Gross Unrealized Losses, 12 Months Or More	121
Held-to-maturity, Fair Value, 12 Months Or More	4,879
Held-to-maturity, Gross Unrealized Losses, Total	153	396
Held-to-maturity, Fair Value, Total	8,845	8,602
Gross Unrealized Losses, Less Than 12 Months	10	98
Fair Value, Less Than 12 Months	3,840	6,402
Gross Unrealized Losses, 12 Months Or More	40
Fair Value, 12 Months Or More	4,460
Gross Unrealized Losses, Total	50	98
Fair Value, Total	8,300	6,402
Mortgage-Backed Securities of Government Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Held-to-maturity, Gross Unrealized Losses, Less Than 12 Months	3	28
Held-to-maturity, Fair Value, Less Than 12 Months	2,011	2,018
Held-to-maturity, Gross Unrealized Losses, 12 Months Or More	93	173
Held-to-maturity, Fair Value, 12 Months Or More	3,274	3,621
Held-to-maturity, Gross Unrealized Losses, Total	96	201
Held-to-maturity, Fair Value, Total	5,285	5,639
Gross Unrealized Losses, Less Than 12 Months	245	589
Fair Value, Less Than 12 Months	20,128	27,243
Gross Unrealized Losses, 12 Months Or More	41
Fair Value, 12 Months Or More	2,316
Gross Unrealized Losses, Total	286	589
Fair Value, Total	22,444	27,243
Asset-Backed Securities of Government Agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Losses, 12 Months Or More	4	46
Fair Value, 12 Months Or More	1,194	1,266
Gross Unrealized Losses, Total	4	46
Fair Value, Total	1,194	1,266
State and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Losses, Less Than 12 Months	9	439
Fair Value, Less Than 12 Months	1,693	19,328
Gross Unrealized Losses, 12 Months Or More	65
Fair Value, 12 Months Or More	2,961
Gross Unrealized Losses, Total	74	439
Fair Value, Total	4,654	19,328
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Losses, Less Than 12 Months		33
Fair Value, Less Than 12 Months		3,593
Gross Unrealized Losses, 12 Months Or More	167	111
Fair Value, 12 Months Or More	2,333	1,889
Gross Unrealized Losses, Total	167	144
Fair Value, Total	$ 2,333	$ 5,482

Loans - Summary of Loans (Detai

Loans - Summary of Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans before deferred costs	$ 508,929	$ 474,968
Deferred loan costs	529	481
Total Loans	509,458	475,449
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans before deferred costs	137,459	134,268
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans before deferred costs	177,588	159,475
Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans before deferred costs	153,281	144,489
Construction & Land Development [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans before deferred costs	23,915	23,428
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans before deferred costs	$ 16,686	$ 13,308

Loans - Additional Information

Loans - Additional Information (Detail)	3 Months Ended	9 Months Ended		12 Months Ended
	Dec. 31, 2016USD ($)Contract	Sep. 30, 2017USD ($)	Sep. 30, 2016Contract	Dec. 31, 2016USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans serviced for others		$ 79,800,000		$ 85,900,000
Concentrations of loans related to a single industry	$ 0	0		0
Loans classified as troubled debt restructurings	6,400,000	3,100,000		6,400,000
Reserves allocated to customers whose loan terms are modified in troubled debt restructurings	711,000	24,000		711,000
Loans payable in nonaccrual of interest status		1,100,000
Foreclosed real estate	$ 0	0		0
Mortgage loans in process of foreclosure amount		154,000		$ 448,000
Loans restructured, subsequently defaulted | Contract			0
Outstanding balance of commercial loans classified under credit risk, minimum amount		300,000
Loans listed as not rated under risk category, maximum amount		300,000
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans restructured, subsequently defaulted | Contract	1
Loans restructured, subsequently defaulted	$ 3,300,000
Performing [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans classified as troubled debt restructurings		$ 2,000,000

Loans - Schedule of Allowances

Loans - Schedule of Allowances for Loan Losses by Portfolio Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	$ 6,289	$ 5,156	$ 5,291	$ 4,662
PROVISION FOR LOAN LOSSES	280	164	965	493
Charge-offs	(1,138)	(346)	(1,185)	(374)
Recoveries	5	28	365	221
Net charge-offs	(1,133)	(318)	(820)	(153)
Ending balance	5,436	5,002	5,436	5,002
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	2,362	2,376	2,207	1,664
PROVISION FOR LOAN LOSSES	881	77	725	797
Charge-offs	(1,138)	(261)	(1,178)	(276)
Recoveries	4	27	355	34
Net charge-offs	(1,134)	(234)	(823)	(242)
Ending balance	2,109	2,219	2,109	2,219
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	1,718	1,262	1,264	1,271
PROVISION FOR LOAN LOSSES	(88)	63	366	(117)
Charge-offs		(38)		(50)
Recoveries				183
Net charge-offs		(38)		133
Ending balance	1,630	1,287	1,630	1,287
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	1,264	1,095	1,189	1,086
PROVISION FOR LOAN LOSSES	(53)	50	14	57
Recoveries		1	8	3
Net charge-offs		1	8	3
Ending balance	1,211	1,146	1,211	1,146
Construction & Land Development [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	222	127	178	123
PROVISION FOR LOAN LOSSES	21	24	65	28
Ending balance	243	151	243	151
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	182	110	141	86
PROVISION FOR LOAN LOSSES	(5)	74	42	98
Charge-offs		(47)	(7)	(48)
Recoveries	1		2	1
Net charge-offs	1	(47)	(5)	(47)
Ending balance	178	137	178	137
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	541	186	312	432
PROVISION FOR LOAN LOSSES	(476)	(124)	(247)	(370)
Ending balance	$ 65	$ 62	$ 65	$ 62

Loans - Allowances for Loan Los

Loans - Allowances for Loan Losses and Ending Balances by Portfolio Class and Based on Impairment Method (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	$ 49		$ 729
Collectively evaluated for impairment	5,387		4,562
Total ending allowance balance	5,436	$ 6,289	5,291	$ 5,002	$ 5,156	$ 4,662
Loans:
Loans individually evaluated for impairment	6,430		7,156
Loans collectively evaluated for impairment	502,499		467,812
Total ending loans balance	508,929		474,968
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	5		705
Collectively evaluated for impairment	2,104		1,502
Total ending allowance balance	2,109	2,362	2,207	2,219	2,376	1,664
Loans:
Loans individually evaluated for impairment	1,241		5,028
Loans collectively evaluated for impairment	136,218		129,240
Total ending loans balance	137,459		134,268
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	20
Collectively evaluated for impairment	1,610		1,264
Total ending allowance balance	1,630	1,718	1,264	1,287	1,262	1,271
Loans:
Loans individually evaluated for impairment	3,703		621
Loans collectively evaluated for impairment	173,885		158,854
Total ending loans balance	177,588		159,475
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	24		24
Collectively evaluated for impairment	1,187		1,165
Total ending allowance balance	1,211	1,264	1,189	1,146	1,095	1,086
Loans:
Loans individually evaluated for impairment	1,486		1,507
Loans collectively evaluated for impairment	151,795		142,982
Total ending loans balance	153,281		144,489
Construction & Land Development [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	243		178
Total ending allowance balance	243	222	178	151	127	123
Loans:
Loans collectively evaluated for impairment	23,915		23,428
Total ending loans balance	23,915		23,428
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	178		141
Total ending allowance balance	178	182	141	137	110	86
Loans:
Loans collectively evaluated for impairment	16,686		13,308
Total ending loans balance	16,686		13,308
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment	65		312
Total ending allowance balance	$ 65	$ 541	$ 312	$ 62	$ 186	$ 432

Loans - Schedule of Impairment

Loans - Schedule of Impairment by Class of Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	$ 8,436	$ 7,953
Recorded Investment with no Allowance	5,986	3,326
Recorded Investment with Allowance	448	3,847
Total Recorded Investment	6,434	7,173
Related Allowance	49	729
Commercial [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	2,868	5,476
Recorded Investment with no Allowance	1,238	1,690
Recorded Investment with Allowance	5	3,354
Total Recorded Investment	1,243	5,044
Related Allowance	5	705
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	3,901	796
Recorded Investment with no Allowance	3,653	600
Recorded Investment with Allowance	51	21
Total Recorded Investment	3,704	621
Related Allowance	20
Residential Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance	1,667	1,681
Recorded Investment with no Allowance	1,095	1,036
Recorded Investment with Allowance	392	472
Total Recorded Investment	1,487	1,508
Related Allowance	$ 24	$ 24

Loans - Schedule of Average Rec

Loans - Schedule of Average Recorded Investment in Impaired Loans and Related Interest Income Recognized (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Average recorded investment:
Average recorded investment in impaired loans	$ 9,166	$ 8,509	$ 7,781	$ 8,696
Interest income recognized:
Interest income recognized on a cash basis on impaired loans	30	72	93	229
Commercial [Member]
Average recorded investment:
Average recorded investment in impaired loans	3,084	6,389	3,376	6,393
Interest income recognized:
Interest income recognized on a cash basis on impaired loans	10	54	41	176
Commercial Real Estate [Member]
Average recorded investment:
Average recorded investment in impaired loans	4,712	660	2,934	799
Interest income recognized:
Interest income recognized on a cash basis on impaired loans	7	3	9	9
Residential Real Estate [Member]
Average recorded investment:
Average recorded investment in impaired loans	1,370	1,460	1,471	1,504
Interest income recognized:
Interest income recognized on a cash basis on impaired loans	$ 13	$ 15	$ 43	$ 44

Loans - Schedule of Aging of Pa

Loans - Schedule of Aging of Past Due and Nonaccrual Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 502,693	$ 471,722
Nonaccrual	4,677	1,449
Total Past Due and Nonaccrual	6,236	3,246
Total ending loans balance	508,929	474,968
30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	1,189	1,423
60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	117	139
90 Days Plus Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	253	235
Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	136,544	133,630
Nonaccrual	743	425
Total Past Due and Nonaccrual	915	638
Total ending loans balance	137,459	134,268
Commercial [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	28	151
Commercial [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due		62
Commercial [Member] | 90 Days Plus Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	144
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	173,989	158,504
Nonaccrual	3,399	497
Total Past Due and Nonaccrual	3,599	971
Total ending loans balance	177,588	159,475
Commercial Real Estate [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	160	435
Commercial Real Estate [Member] | 90 Days Plus Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	40	39
Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	151,684	142,926
Nonaccrual	507	490
Total Past Due and Nonaccrual	1,597	1,563
Total ending loans balance	153,281	144,489
Residential Real Estate [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	914	816
Residential Real Estate [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	108	61
Residential Real Estate [Member] | 90 Days Plus Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	68	196
Construction & Land Development [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	23,915	23,428
Total ending loans balance	23,915	23,428
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	16,561	13,234
Nonaccrual	28	37
Total Past Due and Nonaccrual	125	74
Total ending loans balance	16,686	13,308
Consumer [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	87	21
Consumer [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	9	$ 16
Consumer [Member] | 90 Days Plus Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Past Due	$ 1

Loans - Summary of Troubled Deb

Loans - Summary of Troubled Debt Restructurings (Detail) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017USD ($)Contract	Sep. 30, 2017USD ($)Contract	Sep. 30, 2016USD ($)Contract
Financing Receivable, Modifications [Line Items]
Number of loans restructured | Contract	1	6	3
Pre-Modification Recorded Investment	$ 38	$ 340	$ 327
Post-Modification Recorded Investment	$ 38	$ 340	$ 327
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of loans restructured | Contract		4
Pre-Modification Recorded Investment		$ 288
Post-Modification Recorded Investment		$ 288
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of loans restructured | Contract	1	2	3
Pre-Modification Recorded Investment	$ 38	$ 52	$ 327
Post-Modification Recorded Investment	$ 38	$ 52	$ 327

Loans - Summary of Loans by Cre

Loans - Summary of Loans by Credit Quality Indicator (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 508,929	$ 474,968
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	137,459	134,268
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	177,588	159,475
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	153,281	144,489
Construction & Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	23,915	23,428
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	16,686	13,308
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	294,357	283,768
Pass [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	115,301	116,739
Pass [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	160,677	149,630
Pass [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	208	216
Pass [Member] | Construction & Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	18,171	17,183
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	27,510	12,023
Special Mention [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	16,167	6,874
Special Mention [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	9,933	4,168
Special Mention [Member] | Construction & Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,410	981
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	12,057	15,149
Substandard [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	5,130	9,704
Substandard [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	6,744	4,766
Substandard [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	183	175
Substandard [Member] | Construction & Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans		504
Not Rated [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	175,005	164,028
Not Rated [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	861	951
Not Rated [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	234	911
Not Rated [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	152,890	144,098
Not Rated [Member] | Construction & Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	4,334	4,760
Not Rated [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 16,686	$ 13,308

Loans - Schedule of Loans Not R

Loans - Schedule of Loans Not Rated by Class of Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Loans not rated by class of loans	$ 175,005	$ 164,028
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans not rated by class of loans	861	951
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans not rated by class of loans	234	911
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans not rated by class of loans	152,890	144,098
Construction & Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans not rated by class of loans	4,334	4,760
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans not rated by class of loans	16,686	13,308
Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans not rated by class of loans	174,401	163,333
Performing [Member] | Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans not rated by class of loans	861	951
Performing [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans not rated by class of loans	234	911
Performing [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans not rated by class of loans	152,315	143,440
Performing [Member] | Construction & Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans not rated by class of loans	4,334	4,760
Performing [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans not rated by class of loans	16,657	13,271
Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans not rated by class of loans	604	695
Nonperforming [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans not rated by class of loans	575	658
Nonperforming [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans not rated by class of loans	$ 29	$ 37

Short-Term Borrowings - Summary

Short-Term Borrowings - Summary of Repurchase Agreements Accounted for as Secured Borrowings (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Short-term Debt [Abstract]
Securities of U.S. Government agencies and mortgage-backed securities of government agencies pledged, fair value	$ 45,234	$ 48,866
Repurchase agreements	$ 45,057	$ 48,742

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail) - USD ($)	Sep. 30, 2017	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Liabilities carried at fair value	$ 0	$ 0

Fair Value Measurements - Sched

Fair Value Measurements - Schedule of Fair Value of Assets Measured on Recurring Basis (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Total Securities Available-for-sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	$ 98,048	$ 103,875
U.S. Treasury Security [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	998	1,001
U.S. Government Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	8,300	6,402
Mortgage-Backed Securities of Government Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	50,506	55,837
Other Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets		65
Asset-Backed Securities of Government Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	1,194	1,266
State and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	27,477	29,708
Corporate Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	9,483	9,516
Total Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	97,958	103,795
Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	90	80
Level I [Member] | Total Securities Available-for-sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	1,088	1,081
Level I [Member] | U.S. Treasury Security [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	998	1,001
Level I [Member] | Total Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	998	1,001
Level I [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	90	80
Level II [Member] | Total Securities Available-for-sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	96,960	102,794
Level II [Member] | U.S. Government Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	8,300	6,402
Level II [Member] | Mortgage-Backed Securities of Government Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	50,506	55,837
Level II [Member] | Other Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets		65
Level II [Member] | Asset-Backed Securities of Government Agencies [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	1,194	1,266
Level II [Member] | State and Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	27,477	29,708
Level II [Member] | Corporate Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	9,483	9,516
Level II [Member] | Total Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	$ 96,960	$ 102,794

Fair Value Measurements - Sch40

Fair Value Measurements - Schedule of Fair Value of Assets Measured on Nonrecurring Basis (Detail) - Fair Value, Measurements, Nonrecurring [Member] - Impaired Loans [Member] - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	$ 6,381	$ 6,427
Level III [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	$ 6,381	$ 6,427

Fair Value Measurements - Sch41

Fair Value Measurements - Schedule of Quantitative Information of Assets Measured at Fair Value on Nonrecurring Basis (Detail) - Level III [Member] - Impaired Loans [Member] - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Discounted Cash Flow [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Estimate	$ 2,120	$ 5,330
Discounted Cash Flow [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Remaining term	7 months	6 months
Discount rate	3.50%	3.10%
Discounted Cash Flow [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Remaining term	29 years 9 months 18 days	29 years 10 months 25 days
Discount rate	9.80%	12.00%
Discounted Cash Flow [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Remaining term	182 months	61 months 3 days
Discount rate	4.90%	4.90%
Appraisal of Collateral [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Estimate	$ 4,261	$ 1,097
Liquidation expense	(10.00%)	(10.00%)
Appraisal of Collateral [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Appraisal adjustments	0.00%	0.00%
Appraisal of Collateral [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Appraisal adjustments	(25.00%)	(50.00%)
Appraisal of Collateral [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Appraisal adjustments	(20.00%)	(21.70%)

Fair Values of Financial Inst42

Fair Values of Financial Instruments - Schedule of Estimated Fair Values of Recognized Financial Instruments (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financial assets
Securities available-for-sale	$ 98,048	$ 103,875
Securities held-to-maturity	26,431	23,444
Loans held for sale	1,108
Bank-owned life insurance	13,131	10,361
Carrying Value [Member]
Financial assets
Cash and cash equivalents	45,372	36,838
Securities available-for-sale	98,048	103,875
Securities held-to-maturity	26,475	23,883
Restricted stock	4,614	4,614
Loans held for sale	1,108
Net loans	504,022	470,158
Bank-owned life insurance	13,131	10,361
Accrued interest receivable	1,701	1,409
Financial liabilities
Deposits	571,626	540,785
Short-term borrowings	45,057	48,742
Other borrowings	21,596	12,385
Accrued interest payable	92	76
Carrying Value [Member] | Mortgage Servicing Rights [Member]
Financial assets
Mortgage servicing rights	266	261
Fair Value [Member]
Financial assets
Cash and cash equivalents	45,372	36,838
Securities available-for-sale	98,048	103,875
Securities held-to-maturity	26,431	23,444
Restricted stock	4,614	4,614
Loans held for sale	1,108
Net loans	507,303	471,815
Bank-owned life insurance	13,131	10,361
Accrued interest receivable	1,701	1,409
Financial liabilities
Deposits	572,014	541,318
Short-term borrowings	45,057	48,742
Other borrowings	20,734	12,511
Accrued interest payable	92	76
Fair Value [Member] | Mortgage Servicing Rights [Member]
Financial assets
Mortgage servicing rights	266	261
Fair Value [Member] | Level I [Member]
Financial assets
Cash and cash equivalents	45,372	36,838
Securities available-for-sale	1,088	1,081
Restricted stock	4,614	4,614
Loans held for sale	1,108
Bank-owned life insurance	13,131	10,361
Accrued interest receivable	1,701	1,409
Financial liabilities
Deposits	459,054	428,676
Short-term borrowings	45,057	48,742
Accrued interest payable	92	76
Fair Value [Member] | Level II [Member]
Financial assets
Securities available-for-sale	96,960	102,794
Securities held-to-maturity	26,431	23,444
Fair Value [Member] | Level III [Member]
Financial assets
Net loans	507,303	471,815
Financial liabilities
Deposits	112,960	112,642
Other borrowings	20,734	12,511
Fair Value [Member] | Level III [Member] | Mortgage Servicing Rights [Member]
Financial assets
Mortgage servicing rights	$ 266	$ 261

Fair Values of Financial Inst43

Fair Values of Financial Instruments - Additional Information (Detail) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Commitments to extend credit and letters of credit	$ 177.8	$ 163.7

Accumulated Other Comprehensi44

Accumulated Other Comprehensive Income (Loss) - Schedule of Changes in Accumulated Other Comprehensive Income (Loss) by Component Net of Tax (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Unrealized holding gain on available-for-sale securities arising during the period, Pretax	$ (255)	$ 128	$ 1,132	$ 1,455
Reclassify gain included in income, Pretax		(1)		(1)
Unrealized holding gain on available-for-sale securities arising during the period, Tax Effect	(78)	103	414	661
Reclassify gain included in income, Tax effect	0	0	0	0
Beginning balance, After-tax			(874)
Other comprehensive income (loss)	(150)	199	802	1,284
Ending Balance, After-tax	(72)		(72)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, Pretax	121	1,012	(1,323)	(631)
Unrealized holding gain on available-for-sale securities arising during the period, Pretax	(255)	128	1,132	1,455
Reclassify gain included in income, Pretax		(1)		(1)
Amortization of held-to-maturity discount resulting from transfer, Pretax	27	175	84	491
Total other comprehensive income (loss), Pretax	(228)	302	1,216	1,945
Ending balance, Pretax	(107)	1,314	(107)	1,314
Beginning balance, Tax Effect	(43)	(344)	449	214
Unrealized holding gain on available-for-sale securities arising during the period, Tax Effect	87	(43)	(385)	(494)
Reclassify gain included in income, Tax effect	0	0	0	0
Amortization of held-to-maturity discount resulting from transfer, Tax Effect	(9)	(60)	(29)	(167)
Total other comprehensive income (loss), Tax Effect	78	(103)	(414)	(661)
Ending Balance, Tax Effect	35	(447)	35	(447)
Beginning balance, After-tax	78	668	(874)	(417)
Unrealized holding gain on available-for-sale securities arising during the period, After-tax	(168)	85	747	961
Reclassify gain included in income, After tax		(1)		(1)
Amortization of held-to-maturity discount resulting from transfer, After-tax	18	115	55	324
Other comprehensive income (loss)	(150)	199	802	1,284
Ending Balance, After-tax	$ (72)	$ 867	$ (72)	$ 867