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Financial Instruments with Off-Balance Sheet Risk and Derivative Transactions - Interest Rate Derivatives (Details) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015 USD ($) item	Dec. 31, 2014 USD ($) item
Not designated
Financial Instruments with Off-Balance Sheet Risk and Derivative Transactions
Asset Derivatives, Fair Value	$ 387	$ 173
Liability Derivatives, Fair Value	157	30
Interest rate swap agreements net of swap credit valuation | Cash Flow Hedging [Member]
Financial Instruments with Off-Balance Sheet Risk and Derivative Transactions
Unrealized loss	(816)
Notional or Contractual Amount	25,774
Interest rate swap agreements net of swap credit valuation | Not designated
Financial Instruments with Off-Balance Sheet Risk and Derivative Transactions
Investment securities pledged with financial institutions, dollars	$ 2,000	$ 3,000
Number of correspondent financial institutions where investment securities are pledged | item	2	3
Weighted average maturity	4 years 6 months	2 years 8 months 12 days
Notional or Contractual Amount	$ 17,670	$ 16,334
Asset Derivatives, Fair Value	157	30
Liability Derivatives, Fair Value	157	30
Commitments | Not designated
Financial Instruments with Off-Balance Sheet Risk and Derivative Transactions
Notional or Contractual Amount	231,466	201,946
Asset Derivatives, Fair Value	230	143
Forward MBS contracts and forward loan contracts | Not designated
Financial Instruments with Off-Balance Sheet Risk and Derivative Transactions
Notional or Contractual Amount	$ 19,000	$ 14,000

X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher SEC



-Name Regulation S-X (SX)



-Number 210



-Article 12



-Section 13



-Sentence Column B

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- Definition

Represents the number of financial institutions where investment securities are pledged.

+ References

No definition available.

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 210



-SubTopic 20



-Section 50



-Paragraph 3



-Subparagraph (c)



-URI http://asc.fasb.org/extlink&oid=34720828&loc=SL20225862-175312



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 815



-SubTopic 10



-Section 45



-Paragraph 6



-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958



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-Name Accounting Standards Codification



-Topic 825



-SubTopic 10



-Section 50



-Paragraph 10



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-Name Accounting Standards Codification



-Topic 815



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X

- Definition

Average remaining period until maturity of the derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Fair value, after the effects of master netting arrangements, of a financial liability or 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 liabilities not subject to a master netting arrangement and not elected to be offset.

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-Publisher FASB



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-Topic 210



-SubTopic 20



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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

The carrying amount as of the date of the latest financial statement presented of securities which are owned but transferred to serve as collateral for debt facilities other than FHLB loans, repurchase agreements and letter of credit arrangements, and for which the transferee does not have the right by contract or custom to sell or re-pledge them to an unrelated party.

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-Name Accounting Standards Codification



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-SubTopic 30



-Section 50



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-Subparagraph (b)(1)(i)



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- Definition

The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



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-Paragraph 28



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