Business combination recognized identifiable assets acquired and liabilities assumed junior subordinated debentures.

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Business combination recognized identifiable assets acquired and liabilities assumed junior subordinated debentures face value.

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Percentage of prepayment penalty.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

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Face (par) amount of debt instrument at time of issuance.

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Description of the frequency of periodic payments (monthly, quarterly, annual).

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Increase for accrued, but unpaid interest on the debt instrument for the period.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Contractual interest rate for funds borrowed, under the debt agreement.

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Amount of the required periodic payments applied to principal.

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- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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No definition available.

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Amount of short term borrowing where a bank borrows, at the federal funds rate, from another bank.

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Including the current and noncurrent portions, the carrying value of junior subordinated long-term debt owed to unconsolidated subsidiary trusts as of the balance sheet date. Such debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets and was initially scheduled to be repaid after one year or beyond the normal operating cycle if longer.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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The cash outflow for incremental, external costs directly pertaining to an early extinguishment of debt, including legal costs and prepayment penalties, and excluding interest and repayment of debt principal.

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No definition available.

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Amount of consideration received by subsidiary or equity investee in exchange for shares of stock issued or sold. Includes amount of cash received, fair value of noncash assets received, and fair value of liabilities assumed by the investor.

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No definition available.

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Amount of right to receive securities collateral under master netting arrangements that have not been offset against securities sold under agreement to repurchase.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

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Borrowings and Borrowing Capacity - Additional Information (Details) (USD $)	12 Months Ended	0 Months Ended	12 Months Ended
	Dec. 31, 2014	Nov. 13, 2014	Dec. 31, 2013	Oct. 15, 2013
Debt Instrument [Line Items]
Customer repurchase agreements	$ 14,900,000		$ 11,330,000
Federal funds purchased	0us-gaap_FederalFundsPurchased		0us-gaap_FederalFundsPurchased
Senior secured note			12,573,000us-gaap_SeniorNotes
Debt instrument, Frequency of periodic payment	Quarterly
Junior subordinated debentures	24,423,000		24,171,000
NBI Acquisition
Debt Instrument [Line Items]
Junior subordinated debentures, face value outstanding				32,990,000
Junior subordinated debentures, fair value			24,120,000	24,120,000
Senior Secured Note
Debt Instrument [Line Items]
Senior secured note			12,573,000
Debt instrument quarterly principal payment			314,000
Maturity date	Oct. 15, 2018
Debt instrument interest rate			4.50%
Senior secured note principal amount		11,300,000
Percentage of prepayment penalty		1.00%
Prepayment penalty		113,000
Accrued but unpaid interest		41,000
Minimum \| Senior Secured Note
Debt Instrument [Line Items]
Variable interest rate			4.50%
TSB
Debt Instrument [Line Items]
Unsecured federal funds line of credit	24,500,000
TCB
Debt Instrument [Line Items]
Unsecured federal funds line of credit	75,000,000
National Bancshares Capital Trusts II and III
Debt Instrument [Line Items]
Investments in nonconsolidated subsidiaries, percentage	100.00%
National Bancshares Capital Trusts II
Debt Instrument [Line Items]
Junior subordinated debentures	15,464,000
Obligated capital securities	15,000,000
National Bancshares Capital Trusts II \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Variable interest rate	3.00%
Maturity date	Sep. 15, 2033
Description of variable rate basis	three-month LIBOR
Effective interest rate	3.24%		3.24%
National Bancshares Capital Trusts III
Debt Instrument [Line Items]
Junior subordinated debentures	17,526,000
Obligated capital securities	$ 17,000,000
National Bancshares Capital Trusts III \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Variable interest rate	1.64%
Maturity date	Jul. 07, 2036
Description of variable rate basis	three-month LIBOR
Effective interest rate	1.87%		1.88%
Securities Sold Under Agreements to Repurchase
Debt Instrument [Line Items]
Securities maturity term	1 year
FHLB Advances
Debt Instrument [Line Items]
Securities maturity term	1 month