Allowance for Loan Losses to Nonperforming Loans Minimum Under Debt Covenant

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Distributions on Capital Securities, Deferred, Number of Consecutive Semiannual Periods

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Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Fixed Rate Initial Period

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Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Maturities Period

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- Definition

Fixed charge coverage ratio minimum required by debt covenant

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Interest rate over 3-Month LIBOR on capital securities

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Maturity Period of Long-Term Borrowing

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- Definition

Nonperforming Assets to Tangible Capital plus Allowance for Loan Losses Maximum Under Debt Covenant

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Repurchase Agreements, Call Option Features at Buyer Discretion, Initial Call Period

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Repurchase Agreements, Maturities Period

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- Definition

Total Risk-Based Capital Ratio Minimum Under Debt Covenant

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

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Gross amount of debt extinguished.

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States the weighted average interest rate applicable to the advances from the Federal Home Loan Bank outstanding as of the Balance Sheet date.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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-Name Accounting Standards Codification

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Including the current and noncurrent portions, carrying value as of the balance sheet date of long-term debt (with maturities initially due after one year or beyond the operating cycle if longer) identified as Junior Subordinated Notes, which have a lower priority than senior instruments.

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Total assets that cannot be used for operating purposes because of contract or regulatory requirements that are in effect for a period that extends beyond one year.

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The cash inflow from the issuance of long-term debt that is not secured by collateral. Excludes proceeds from tax exempt unsecured debt.

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-Name Accounting Standards Codification

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The cash outflow for a borrowing supported by a written promise to pay an obligation.

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Long-Term Borrowings (Narrative) (Details) $ in Thousands				6 Months Ended
Long-Term Borrowings (Narrative) (Details) $ in Thousands	Jul. 24, 2015 USD ($)	Mar. 06, 2015 USD ($) semi_annual_period	Dec. 18, 2012 USD ($)	Jun. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)	Aug. 04, 2014 USD ($)
Proceeds from issuance of unsecured debt			$ 24,000
Maturity period of long-term borrowing			5 years
Weighted- Average Rate			3.80%	3.50%	3.50%	3.50%
Total risk-based capital ratio minimum under debt covenant						12.50%
Nonperforming assets to tangible capital plus allowance for loan losses maximum under debt covenant						20.00%
Fixed charge coverage ratio minimum required by debt covenant						125.00%
Other restricted assets						$ 2,000
Allowance for loan losses to nonperforming loans minimum under debt covenant						70.00%
Losses on extinguishment of debt				$ 520
Subordinated debt				$ 6,637	$ 0
Interest rate on capital securities		1.50%
Subsequent Event [Member]
Repayments of notes payable	$ 12,000
Minimum
Repurchase agreements, maturities period				5 years
Repurchase agreements, call option features at buyer discretion, initial call period				3 months
Maximum
Repurchase agreements, maturities period				10 years
Repurchase agreements, call option features at buyer discretion, initial call period				5 years
Distributions on capital securities, deferred, number of consecutive semi-annual periods \| semi_annual_period		20
Federal Home Loan Bank Advances, Fixed Rate, Amortizing [Member]
Weighted- Average Rate				2.61%	2.13%
Federal Home Loan Bank Advances, Fixed Rate, Amortizing [Member] \| Minimum
Federal Home Loan Bank, advances, general debt obligations, disclosures, maturities period				10 years
Federal Home Loan Bank Advances, Fixed Rate, Amortizing [Member] \| Maximum
Federal Home Loan Bank, advances, general debt obligations, disclosures, maturities period				20 years
Federal Home Loan Bank Advances, Fixed Rate, Putable Non-amortizing [Member]
Weighted- Average Rate				3.32%	3.30%
Federal Home Loan Bank Advances, Fixed Rate, Putable Non-amortizing [Member] \| Minimum
Federal Home Loan Bank, advances, general debt obligations, disclosures, maturities period				10 years
Federal Home Loan Bank Advances, Fixed Rate, Putable Non-amortizing [Member] \| Maximum
Federal Home Loan Bank, advances, general debt obligations, disclosures, maturities period				20 years
Federal Home Loan Bank Advances, Convertible Rate Advances [Member] \| Minimum
Federal Home Loan Bank, advances, general debt obligations, disclosures, fixed rate initial period				3 months
Federal Home Loan Bank Advances, Convertible Rate Advances [Member] \| Maximum
Federal Home Loan Bank, advances, general debt obligations, disclosures, fixed rate initial period				5 years
Repayments of debt [Member] \| Federal Home Loan Bank Advances, Fixed Rate, Putable Non-amortizing [Member]
Extinguishment of debt, amount				$ 52,100
Weighted- Average Rate				1.49%
NB&T Financial Group, Inc.
Subordinated debt		$ 6,600