Foreclosed Assets (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012 Asset	Dec. 31, 2011 Asset
Summary of the activity in the balance of foreclosed assets
Beginning balance, net	$ 16,332	$ 9,913
Acquisitions		8,412
Additions/transfers from loans	9,365	6,943
Dispositions/sales	(16,471)	(6,952)
Valuation adjustments	(1,728)	(1,984)
Ending balance, net	7,498	16,332
Ending valuation allowance	(2,023)	(2,346)
Ending number of foreclosed assets	39	73
Proceeds from sale of foreclosed assets	17,257	7,632
Gain on sale of foreclosed assets	786	680
Noncovered [Member]
Summary of the activity in the balance of foreclosed assets
Beginning balance, net	13,268	5,000
Acquisitions		8,412
Additions/transfers from loans	8,732	6,909
Dispositions/sales	(14,776)	(5,794)
Valuation adjustments	(1,267)	(1,259)
Ending balance, net	5,957	13,268
Ending valuation allowance	(1,357)	(1,570)
Ending number of foreclosed assets	34	62
Proceeds from sale of foreclosed assets	15,319	6,368
Gain on sale of foreclosed assets	543	574
Covered [Member]
Summary of the activity in the balance of foreclosed assets
Beginning balance, net	3,064	4,913
Additions/transfers from loans	633	34
Dispositions/sales	(1,695)	(1,158)
Valuation adjustments	(461)	(725)
Ending balance, net	1,541	3,064
Ending valuation allowance	(666)	(776)
Ending number of foreclosed assets	5	11
Proceeds from sale of foreclosed assets	1,938	1,264
Gain on sale of foreclosed assets	$ 243	$ 106

Additions transfers from loans related to foreclosed assets.

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- Definition

Ending number of foreclosed assets.

+ References

No definition available.

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Ending valuation allowance.

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- Definition

The gains (losses) included in results of operations resulting from the sale or disposal of other assets.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

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Carrying amount as of the balance sheet date of other real estate and foreclosed assets. Other real estate may include real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations may also be included in real estate owned. Foreclosed assets include all assets obtained in full or partial satisfaction of a debt arrangement through foreclosure proceedings.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.10(4))

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

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-Publisher AICPA

-Name Audit and Accounting Guide (AAG)

-Number AAG-DEP

-Paragraph 2, 3, 4

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-Chapter 11

-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.

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Disposals of other real estate not separately disclosed, including, but not limited to, real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations may also be included in real estate owned. This excludes real estate assets taken in settlement of troubled loans through surrender or foreclosure.

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Valuation adjustments made to other real estate not separately disclosed, including, but not limited to, real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations may also be included in real estate owned. This excludes real estate assets taken in settlement of troubled loans through surrender or foreclosure.

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- Definition

The cash inflow from the sale assets received in full or partial satisfaction of a receivable including real and personal property; equity interests in corporations, partnerships, and joint ventures; and beneficial interests in trusts. Foreclosed assets also include loans that are treated as if the underlying collateral had been foreclosed because the institution has taken possession of the collateral, even though legal foreclosure or repossession proceedings have not taken place.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3179-108585

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 16

-Subparagraph c

-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.

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- Definition

Carrying amount as of the balance sheet date of land and buildings obtained through foreclosure proceedings or defeasance in full or partial satisfaction of a debt arrangement.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph c

-Subparagraph Schedule III

-Article 5

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 28

-Article 12

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-Publisher AICPA

-Name Statement of Position (SOP)

-Number 01-6

-Paragraph 13

-Subparagraph f

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 45

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6375948&loc=d3e4437-111522

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-IssueDate 2006-05-01

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