Goodwill And Other Intangible Assets (Estimated Future Amortization Expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2012
Loan Servicing Rights [Member]
Finite-Lived Intangible Assets [Line Items]
2012	$ 1,743
2013	2,517
2014	1,907
2015	1,353
2016	1,011
Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
2012	2,752
2013	3,078
2014	2,359
2015	1,758
2016	1,195
Others [Member]
Finite-Lived Intangible Assets [Line Items]
2012	492
2013	541
2014	466
2015	434
2016	$ 233

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The amount of amortization expense expected to be recognized during year five of the five succeeding fiscal years.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph a(3)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=6905858&loc=d3e16323-109275

+ Details

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- Definition

The amount of amortization expense expected to be recognized during year four of the five succeeding fiscal years.

+ References

+ Details

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- Definition

The amount of amortization expense expected to be recognized during year one of the five succeeding fiscal years.

+ References

+ Details

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- Definition

The amount of amortization expense expected to be recognized during year three of the five succeeding fiscal years.

+ References

+ Details

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- Definition

The amount of amortization expense expected to be recognized during year two of the five succeeding fiscal years.

+ References

+ Details

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