Derivative Financial Instruments (Narrative) (Details) (USD $)	Dec. 31, 2014 derivative_instrument	Dec. 31, 2013 derivative_instrument
Designated as Hedging Instrument [Member] \| Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Number of derivative instruments held	2	2
Notional amount	$ 22,700,000	$ 22,700,000
Pledged collateral to derivative counterparties	939,000	1,600,000
Not Designated as Hedging Instrument [Member] \| Interest rate swaps with customers [Member]
Derivatives, Fair Value [Line Items]
Notional amount	165,800,000	105,600,000
Not Designated as Hedging Instrument [Member] \| Mirror swaps with counterparties [Member]
Derivatives, Fair Value [Line Items]
Notional amount	$ 165,800,000	$ 105,600,000

The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4H

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624258-113959

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Nominal or face amount used to calculate payments on the derivative asset.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1B

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5580258-113959

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1A

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5579245-113959

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Notional Amount

-URI http://asc.fasb.org/extlink&oid=6519104

+ Details

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- Definition

The number of derivative instruments of a particular group held by the entity.

+ References

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Period Type:	instant

- Details

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Balance Type:	na
Period Type:	duration

- Details

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- Details

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