Time Certificates of Deposit (Schedule of Time Certifcates of Deposit Maturities) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Deposits [Abstract]
Time deposits amounts scheduled to mature July 1, 2012 through December 31, 2012	$ 355,866
Time deposits weighted average rate for maturities July 1, 2012 to December 31, 2012	0.58%
Time deposits amounts scheduled to mature in 2013	225,934
Time deposits weighted average rate for maturities in 2013	1.54%
Time deposits amounts scheduled to mature in 2014	136,114
Time deposits weighted average rate for maturities in 2014	1.90%
Time deposits amounts scheduled to mature in 2015	86,170
Time deposits weighted average rate for maturities in 2015	2.63%
Time deposits amounts scheduled to mature in 2016	69,109
Time deposits weighted average rate for maturities in 2016	1.82%
Time deposits amounts schedule to mature in 2017 and after	19,190
Time deposits weighted average rate for maturities in 2017 and after	1.77%
Time deposits	$ 892,383	$ 878,794

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Amount of time deposits (including certificates of deposits, individual retirement accounts and open accounts) held by the entity with a remaining term of greater than five years.

+ References

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

-Publisher AICPA

-Name Audit and Accounting Guide (AAG)

-Number AAG-DEP

-Chapter 13

-Paragraph 45

-Subparagraph a

-IssueDate 2006-05-01

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 470

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601

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Amount of time deposits (including certificates of deposits, individual retirement accounts and open accounts) held by the entity with a remaining term of greater than four years but five years or less.

+ References

+ Details

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Amount of time deposits (including certificates of deposits, individual retirement accounts and open accounts) held by the entity with a remaining term of greater than three years but four years or less.

+ References

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Amount of time deposits (including certificates of deposits, individual retirement accounts and open accounts) held by the entity with a remaining term of twelve months or less.

+ References

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Amount of time deposits (including certificates of deposits, individual retirement accounts and open accounts) held by the entity with a remaining term of greater than two years but three years or less.

+ References

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Amount of time deposits (including certificates of deposits, individual retirement accounts and open accounts) held by the entity with a remaining term of greater than twelve months, but two years or less.

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The aggregate amount of time deposits, including certificates of deposits, individual retirement accounts and open accounts.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 12

-Article 9

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.12)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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Weighted average interest rate for time deposits held by the entity with maturities greater than five years.

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No definition available.

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Weighted average interest rate for time deposits held by the entity with maturities greater than four years, but five years or less.

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Weighted average interest rate for time deposits held by the entity with maturities greater than three years, but four years or less.

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No definition available.

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Weighted average interest rate for time deposits held by the entity with maturities of one year or less.

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No definition available.

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Weighted average interest rate for time deposits held by the entity with maturities greater than two years, but three years or less.

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No definition available.

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Weighted average interest rate for time deposits held by the entity with maturities greater than one year, but two years or less.

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