Derivative Instruments and Hedging Activities, Derivative Contract Type (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended	12 Months Ended
Sep. 30, 2013	Sep. 30, 2013	Dec. 31, 2012
Derivatives in cash flow hedging relationships [Abstract]
Amount of gain (loss) recognized in OCI on derivatives, net of tax (effective portion)		$ 166	$ (181)
Location of gain or (loss) recognized in income on derivative (ineffective portion)		Not applicable	Not applicable
Amount of gain (loss) recognized in income on derivative (ineffective portion)		0	0
Interest Rate Swap [Member]
Derivatives in fair value hedging relationships [Abstract]
Description of income statement classification	Interest income		Income Statement Classification
Gain or (Loss) on swaps		38	(51)
Interest Rate Swap-10 Year Cash Flow [Member] \| Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Notional/ contract amount	4,000	4,000	4,000
Estimated net fair value	(295)	(295)	(547)
Fair value balance sheet location	Other Liabilities		Other Liabilities
Expiration date	Sep. 15, 2020		Sep. 15, 2020
Interest Rate Swap-10 Year Fair Value 1 [Member] \| Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Notional/ contract amount	2,172	2,172	2,204
Estimated net fair value	(25)	(25)	(148)
Fair value balance sheet location	Other Liabilities		Other Liabilities
Expiration date	Aug. 15, 2021		Aug. 15, 2021
Interest Rate Swap-10 Year Fair Value 2 [Member] \| Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Notional/ contract amount	2,048	2,048	2,078
Estimated net fair value	(25)	(25)	(141)
Fair value balance sheet location	Other Liabilities		Other Liabilities
Expiration date	Aug. 15, 2021		Aug. 15, 2021
Interest Rate Swap-10 Year Fair Value 3 [Member] \| Other Assets [Member]
Derivatives, Fair Value [Line Items]
Notional/ contract amount	1,032	1,032
Estimated net fair value	54	54
Fair value balance sheet location	Other Assets
Expiration date	Sep. 26, 2022
Interest Rate Swap-10 Year Fair Value 3 [Member] \| Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Notional/ contract amount			1,050
Estimated net fair value			$ (5)
Fair value balance sheet location			Other Liabilities
Expiration date			Sep. 26, 2022

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

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Fair value of the assets less the liabilities of a derivative or group of derivatives.

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The portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness.

+ References

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The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

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Date the derivative contract matures, in CCYY-MM-DD format.

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Description of where the net gain (loss) on interest rate derivatives are reported in the statement of income or other statement of financial performance.

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Description of where the net gain (loss) on interest rate derivatives designated as fair value hedges are reported in the statement of income or other statement of financial performance.

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Description of where the interest rate derivatives designated as fair value hedges are reported in the balance sheet.

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Total amount of gain (loss) derived from fair value hedges recognized in earnings in the period.

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