Disclosures About Fair Value of Assets and Liabilities (Details 5) (USD $) In Thousands, unless otherwise specified	9 Months Ended
Sep. 30, 2012
Impaired loans [Member]
Unobservable inputs in recurring and nonrecurring level three fair value measurements
Unobservable Inputs	Discount to reflect current market conditions and ultimate collectability
Mortgage servicing rights [Member]
Unobservable inputs in recurring and nonrecurring level three fair value measurements
Unobservable Inputs	Discount to reflect current market conditions
Level 3 [Member] \| Impaired loans [Member]
Unobservable inputs in recurring and nonrecurring level three fair value measurements
Fair Value at September 30, 2012	10,462
Valuation Technique	Collateral based measurement
Level 3 [Member] \| Mortgage servicing rights [Member]
Unobservable inputs in recurring and nonrecurring level three fair value measurements
Fair Value at September 30, 2012	4,602
Valuation Technique	Discounted cashflows
Maximum [Member] \| Level 3 [Member] \| Impaired loans [Member]
Unobservable inputs in recurring and nonrecurring level three fair value measurements
Range (Weighted Average)	50.00%
Maximum [Member] \| Level 3 [Member] \| Mortgage servicing rights [Member]
Unobservable inputs in recurring and nonrecurring level three fair value measurements
Range (Weighted Average)	20.00%
Minimum [Member] \| Level 3 [Member] \| Impaired loans [Member]
Unobservable inputs in recurring and nonrecurring level three fair value measurements
Range (Weighted Average)	0.00%
Minimum [Member] \| Level 3 [Member] \| Mortgage servicing rights [Member]
Unobservable inputs in recurring and nonrecurring level three fair value measurements
Range (Weighted Average)	0.00%

Fair value measurements weighted average range.

No definition available.

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- Definition

Fair value measurement with unobservable inputs recurring and nonrecurring basis excluding goodwill.

+ References

No definition available.

+ Details

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- Details

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Balance Type:	na
Period Type:	duration

- Definition

This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

+ References

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=7578670&loc=d3e19207-110258

+ Details

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

- Definition

Description of the inputs and valuation technique(s) used to measure fair value.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (bbb)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

+ Details

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