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Fair Value - Assets and Liabilities at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 23,456	$ 14,299	$ 19,169	$ 13,057
Interest bearing deposits in other banks	15,098	4,013	301
Securities available for sale	282,293	223,039	215,933
Securities to be held to maturity	188,770	240,023	245,322
Securities to be held to maturity	195,797	243,123	248,344
Restricted equity securities	14,048	14,257	13,912
Loans held for sale	1,228	349	200
Mortgage servicing rights	1,683	1,915	2,014
Demand deposits	158,476	130,566	128,555
NOW deposits	295,708	242,638	246,155
Money market deposits	76,685	92,994	95,217
Savings deposits	218,425	206,009	199,131
Total deposits	1,173,749	1,043,189	1,058,365
Carrying value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	23,456	14,299	19,169
Interest bearing deposits in other banks	15,098	4,013	301
Securities available for sale	282,293	223,039	215,933
Securities to be held to maturity	188,770	240,023	245,322
Restricted equity securities	14,048	14,257	13,912
Loans held for sale	1,228	349	200
Loans	1,018,694	978,722	953,474
Mortgage servicing rights	1,071	1,093	1,095
Interest rate swap agreements	90
Accrued interest receivable	5,079	4,912	5,189
Demand deposits	158,476	130,566	128,555
NOW deposits	295,708	242,638	246,155
Money market deposits	76,685	92,994	95,217
Savings deposits	218,425	206,009	199,131
Local certificates of deposit	211,402	201,420	195,607
National certificates of deposit	213,053	169,562	193,700
Total deposits	1,173,749	1,043,189	1,058,365
Repurchase agreements	87,970	87,103	100,498
Federal Home Loan Bank advances	180,128	250,354	196,871
Total borrowed funds	268,098	337,457	297,369
Accrued interest payable	508	435	499
Carrying value | Commercial | Real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	293,167	265,616	264,807
Carrying value | Commercial | Construction
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	18,452	24,166	22,927
Carrying value | Commercial | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	129,258	126,551	117,379
Carrying value | Municipal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	26,132	19,730	21,357
Carrying value | Residential | Construction
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	14,226	8,421	12,002
Carrying value | Residential | Term
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	401,597	401,315	383,691
Carrying value | Home equity line of credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	110,989	109,101	108,265
Carrying value | Consumer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	24,873	23,822	23,046
Total Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	23,456	14,299	19,169
Interest bearing deposits in other banks	15,098	4,013	301
Securities available for sale	282,293	223,039	215,933
Securities to be held to maturity	195,797	243,123	248,344
Restricted equity securities	14,048	14,257	13,912
Loans held for sale	1,228	349	200
Loans	1,022,649	978,707	957,290
Mortgage servicing rights	1,683	1,915	2,014
Interest rate swap agreements	90
Accrued interest receivable	5,079	4,912	5,189
Demand deposits	163,498	125,651	124,979
NOW deposits	296,393	224,627	230,680
Money market deposits	71,714	82,050	84,535
Savings deposits	206,331	181,010	176,791
Local certificates of deposit	213,622	201,013	196,663
National certificates of deposit	213,332	169,617	193,774
Total deposits	1,164,890	983,968	1,007,422
Repurchase agreements	87,246	82,168	95,078
Federal Home Loan Bank advances	181,918	250,027	197,795
Total borrowed funds	269,164	332,195	292,873
Accrued interest payable	508	435	499
Total Fair Value | Commercial | Real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	289,015	262,763	262,197
Total Fair Value | Commercial | Construction
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	18,191	23,906	22,701
Total Fair Value | Commercial | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	129,143	126,141	117,427
Total Fair Value | Municipal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	27,270	20,331	21,907
Total Fair Value | Residential | Construction
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	14,170	8,379	11,960
Total Fair Value | Residential | Term
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	409,916	405,315	390,392
Total Fair Value | Home equity line of credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	110,220	108,118	107,589
Total Fair Value | Consumer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	24,724	23,754	23,117
Total Fair Value | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	23,456	14,299	19,169
Interest bearing deposits in other banks	15,098	4,013	301
Securities available for sale	0	0	0
Securities to be held to maturity	0	0	0
Restricted equity securities	0	0	0
Loans held for sale	0	0	0
Loans	0	0	0
Mortgage servicing rights	0	0	0
Accrued interest receivable	0	0	0
Demand deposits	0	0	0
NOW deposits	0	0	0
Money market deposits	0	0	0
Savings deposits	0	0	0
Local certificates of deposit	0	0	0
National certificates of deposit	0	0	0
Total deposits	0	0	0
Repurchase agreements	0	0	0
Federal Home Loan Bank advances	0	0	0
Total borrowed funds	0	0	0
Accrued interest payable	0	0	0
Total Fair Value | Level 1 | Commercial | Real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0	0
Total Fair Value | Level 1 | Commercial | Construction
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0	0
Total Fair Value | Level 1 | Commercial | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0	0
Total Fair Value | Level 1 | Municipal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0	0
Total Fair Value | Level 1 | Residential | Construction
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0	0
Total Fair Value | Level 1 | Residential | Term
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0	0
Total Fair Value | Level 1 | Home equity line of credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0	0
Total Fair Value | Level 1 | Consumer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0	0
Total Fair Value | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0	0	0
Interest bearing deposits in other banks	0	0	0
Securities available for sale	282,293	223,039	215,933
Securities to be held to maturity	195,797	243,123	248,344
Restricted equity securities	14,048	14,257	13,912
Loans held for sale	1,228	349	200
Loans	1,311	699	1,413
Mortgage servicing rights	1,683	1,915	2,014
Interest rate swap agreements	90
Accrued interest receivable	5,079	4,912	5,189
Demand deposits	163,498	125,651	124,979
NOW deposits	296,393	224,627	230,680
Money market deposits	71,714	82,050	84,535
Savings deposits	206,331	181,010	176,791
Local certificates of deposit	213,622	201,013	196,663
National certificates of deposit	213,332	169,617	193,774
Total deposits	1,164,890	983,968	1,007,422
Repurchase agreements	87,246	82,168	95,078
Federal Home Loan Bank advances	181,918	250,027	197,795
Total borrowed funds	269,164	332,195	292,873
Accrued interest payable	508	435	499
Total Fair Value | Level 2 | Commercial | Real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	544	0	0
Total Fair Value | Level 2 | Commercial | Construction
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0	0
Total Fair Value | Level 2 | Commercial | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0	0
Total Fair Value | Level 2 | Municipal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0	0
Total Fair Value | Level 2 | Residential | Construction
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	0	0
Total Fair Value | Level 2 | Residential | Term
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	703	0	1,413
Total Fair Value | Level 2 | Home equity line of credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	0	699	0
Total Fair Value | Level 2 | Consumer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	64	0	0
Total Fair Value | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0	0	0
Interest bearing deposits in other banks	0	0	0
Securities available for sale	0	0	0
Securities to be held to maturity	0	0	0
Restricted equity securities	0	0	0
Loans held for sale	0	0	0
Loans	1,021,338	978,008	955,877
Mortgage servicing rights	0	0	0
Interest rate swap agreements	0
Accrued interest receivable	0	0	0
Demand deposits	0	0	0
NOW deposits	0	0	0
Money market deposits	0	0	0
Savings deposits	0	0	0
Local certificates of deposit	0	0	0
National certificates of deposit	0	0	0
Total deposits	0	0	0
Repurchase agreements	0	0	0
Federal Home Loan Bank advances	0	0	0
Total borrowed funds	0	0	0
Accrued interest payable	0	0	0
Total Fair Value | Level 3 | Commercial | Real estate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	288,471	262,763	262,197
Total Fair Value | Level 3 | Commercial | Construction
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	18,191	23,906	22,701
Total Fair Value | Level 3 | Commercial | Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	129,143	126,141	117,427
Total Fair Value | Level 3 | Municipal
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	27,270	20,331	21,907
Total Fair Value | Level 3 | Residential | Construction
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	14,170	8,379	11,960
Total Fair Value | Level 3 | Residential | Term
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	409,213	405,315	388,979
Total Fair Value | Level 3 | Home equity line of credit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	110,220	107,419	107,589
Total Fair Value | Level 3 | Consumer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	$ 24,660	$ 23,754	$ 23,117

X

- Definition

Represents the portion of the balance sheet assertion valued at fair value whether such amount is presented as a separate caption or as a parenthetical disclosure. Element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. May be used in both the balance sheet and disclosure in the same submission. This item represents the amount shown on an entity's books for accrued interest receivable.

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The aggregate amount of local time deposits, including certificates of deposits, individual retirement accounts and open accounts.

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The aggregate amount of national time deposits, including certificates of deposits, individual retirement accounts and open accounts.

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Amount of stock held at Federal Home Loan Bank and Federal Reserve Bank. Federal Home Loan Bank (FHLB) stock and Federal Reserve Bank Stock represents an equity interest in a FHLB of FRB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity).

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Fair value portion of accrued expenses.

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Amount to be repaid to the counterparty to the repurchase agreement when the carrying amount (or market value, if higher than the carrying amount) of securities or other assets sold under the repurchase agreement exceeds 10 percent of total assets.

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

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The amount of money in accounts that may bear interest and that the depositor is entitled to withdraw at any time without prior notice.

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The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others.

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Amount of deposits in accounts that offer many of the same services as checking accounts although transactions may be somewhat more limited, share some of the characteristics of a money market fund and are insured by the Federal government, also known as money market accounts.

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Amount of deposits in interest-bearing transaction accounts at banks or savings and loans, that are restricted in regard to ownership and can usually only be held by individuals, nonprofit entities and governments. Negotiable order of withdrawal accounts differ from money market demand accounts as they typically have higher reserve requirements and no limit on the number of checks that can be written.

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Amount of interest bearing deposits with no stated maturity, which may include passbook and statement savings accounts and money-market deposit accounts (MMDAs).

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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