Fair Value of Financial Assets and Liabilities, Quantitative Information about Level 3 Fair Value Measurements (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Sep. 30, 2015	Dec. 31, 2014
Mortgage Servicing Rights [Member] \| Minimum [Member]
Unobservable inputs [Abstract]
Constant prepayment rate	6.10%	4.60%
Probability of default	0.00%	0.00%
Discount rate	10.00%	10.00%
Mortgage Servicing Rights [Member] \| Maximum [Member]
Unobservable inputs [Abstract]
Constant prepayment rate	23.90%	25.10%
Probability of default	100.00%	100.00%
Discount rate	11.50%	11.50%
Mortgage Servicing Rights [Member] \| Weighted Average [Member]
Unobservable inputs [Abstract]
Constant prepayment rate	11.30%	11.30%
Probability of default	2.70%	3.60%
Discount rate	10.10%	10.10%
Mortgage Servicing Rights [Member] \| Discount Cash Flows, Computer Pricing Model [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value	$ 3,030	$ 2,968
Impaired Loans (Collateral Dependent) [Member] \| Minimum [Member]
Unobservable inputs [Abstract]
Marketability discount	5.00%	5.00%
Impaired Loans (Collateral Dependent) [Member] \| Maximum [Member]
Unobservable inputs [Abstract]
Marketability discount	10.00%	10.00%
Impaired Loans (Collateral Dependent) [Member] \| Weighted Average [Member]
Unobservable inputs [Abstract]
Marketability discount	7.00%	7.00%
Impaired Loans (Collateral Dependent) [Member] \| Market Comparable Properties [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value	$ 2,195	$ 4,665
Other Real Estate/Asset Owned [Member] \| Minimum [Member]
Unobservable inputs [Abstract]
Comparability adjustments	5.00%	3.00%
Other Real Estate/Asset Owned [Member] \| Maximum [Member]
Unobservable inputs [Abstract]
Comparability adjustments	30.00%	67.00%
Other Real Estate/Asset Owned [Member] \| Weighted Average [Member]
Unobservable inputs [Abstract]
Comparability adjustments	10.50%	18.00%
Other Real Estate/Asset Owned [Member] \| Market Comparable Properties [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value	$ 4,015	$ 6,472

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

+ Details

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Balance Type:	debit
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- References

No definition available.

+ Details

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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.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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- Definition

Percentage of adjustment to the observed price for a similar asset or liability when an identical transaction does not exist, used as an input to measure fair value.

+ References