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Allowance for Loan Losses and Credit Quality Indicators (Details 3) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	$ 1,568,312	$ 1,396,067
Covered under loss share agreements	238,777
Commercial loans [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	873,971	712,040
Covered under loss share agreements	97,542
Commercial loans [Member] | Construction commercial [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	20,877	35,482
Covered under loss share agreements	17,770
Commercial loans [Member] | Land development [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	6,549	2,902
Covered under loss share agreements
Commercial loans [Member] | Other land loans [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	26,571	23,384
Covered under loss share agreements
Commercial loans [Member] | Commercial and industrial [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	99,364	91,939
Covered under loss share agreements	7,663
Commercial loans [Member] | Multi-family residential [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	86,040	77,050
Covered under loss share agreements	3,706
Commercial loans [Member] | Single family non-owner occupied [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	140,684	106,743
Covered under loss share agreements
Commercial loans [Member] | Non-farm, non-residential [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	453,820	336,005
Covered under loss share agreements	66,751
Commercial loans [Member] | Agricultural [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	1,643	1,374
Covered under loss share agreements	307
Commercial loans [Member] | Farmland [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	38,423	37,161
Covered under loss share agreements	1,345
Consumer real estate [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	612,710	604,031
Covered under loss share agreements	136,701
Consumer real estate [Member] | Single family non-owner occupied [Member]
Company's investment in loans held for investment by internal credit grade indicator
Covered under loss share agreements	45,691
Consumer real estate [Member] | Home equity lines [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	115,843	111,387
Covered under loss share agreements	88,508
Consumer real estate [Member] | Single family owner occupied [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	466,450	473,067
Consumer real estate [Member] | Owner occupied construction [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	30,417	19,577
Covered under loss share agreements	2,502
Consumer and other loans [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	81,631	79,996
Covered under loss share agreements	4,534
Consumer and other loans [Member] | Consumer loans [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	75,781	67,129
Covered under loss share agreements	4,534
Consumer and other loans [Member] | Other [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	5,850	12,867
Covered under loss share agreements
Pass [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	1,437,789	1,287,286
Covered under loss share agreements	180,939
Pass [Member] | Commercial loans [Member] | Construction commercial [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	19,390	34,512
Covered under loss share agreements	3,818
Pass [Member] | Commercial loans [Member] | Land development [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	6,377	2,479
Covered under loss share agreements
Pass [Member] | Commercial loans [Member] | Other land loans [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	23,178	17,171
Covered under loss share agreements
Pass [Member] | Commercial loans [Member] | Commercial and industrial [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	90,824	86,288
Covered under loss share agreements	6,986
Pass [Member] | Commercial loans [Member] | Multi-family residential [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	81,808	74,486
Covered under loss share agreements	2,432
Pass [Member] | Commercial loans [Member] | Single family non-owner occupied [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	126,382	93,444
Covered under loss share agreements
Pass [Member] | Commercial loans [Member] | Non-farm, non-residential [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	408,333	303,071
Covered under loss share agreements	41,419
Pass [Member] | Commercial loans [Member] | Agricultural [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	1,603	1,327
Covered under loss share agreements	305
Pass [Member] | Commercial loans [Member] | Farmland [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	35,057	35,568
Covered under loss share agreements	1,102
Pass [Member] | Consumer real estate [Member] | Single family non-owner occupied [Member]
Company's investment in loans held for investment by internal credit grade indicator
Covered under loss share agreements	33,234
Pass [Member] | Consumer real estate [Member] | Home equity lines [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	108,758	105,535
Covered under loss share agreements	86,685
Pass [Member] | Consumer real estate [Member] | Single family owner occupied [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	425,619	435,001
Pass [Member] | Consumer real estate [Member] | Owner occupied construction [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	29,892	19,190
Covered under loss share agreements	1,218
Pass [Member] | Consumer and other loans [Member] | Consumer loans [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	74,750	66,357
Covered under loss share agreements	3,740
Pass [Member] | Consumer and other loans [Member] | Other [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	5,818	12,857
Covered under loss share agreements
Special Mention [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	33,020	30,720
Covered under loss share agreements	15,706
Special Mention [Member] | Commercial loans [Member] | Construction commercial [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	149	15
Covered under loss share agreements	2,536
Special Mention [Member] | Commercial loans [Member] | Land development [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements
Covered under loss share agreements
Special Mention [Member] | Commercial loans [Member] | Other land loans [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	3,084	5,629
Covered under loss share agreements
Special Mention [Member] | Commercial loans [Member] | Commercial and industrial [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	951	568
Covered under loss share agreements	204
Special Mention [Member] | Commercial loans [Member] | Multi-family residential [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	1,420	965
Special Mention [Member] | Commercial loans [Member] | Single family non-owner occupied [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	2,711	1,346
Covered under loss share agreements
Special Mention [Member] | Commercial loans [Member] | Non-farm, non-residential [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	11,953	9,635
Covered under loss share agreements	6,565
Special Mention [Member] | Commercial loans [Member] | Agricultural [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	5	7
Special Mention [Member] | Commercial loans [Member] | Farmland [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	1,366	1,055
Covered under loss share agreements	1
Special Mention [Member] | Consumer real estate [Member] | Single family non-owner occupied [Member]
Company's investment in loans held for investment by internal credit grade indicator
Covered under loss share agreements	4,552
Special Mention [Member] | Consumer real estate [Member] | Home equity lines [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	1,947	2,237
Covered under loss share agreements	990
Special Mention [Member] | Consumer real estate [Member] | Single family owner occupied [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	8,774	8,936
Special Mention [Member] | Consumer real estate [Member] | Owner occupied construction [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	272	128
Covered under loss share agreements	283
Special Mention [Member] | Consumer and other loans [Member] | Consumer loans [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	363	198
Covered under loss share agreements	575
Special Mention [Member] | Consumer and other loans [Member] | Other [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	25	1
Covered under loss share agreements
Substandard [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	91,865	75,213
Covered under loss share agreements	41,309
Substandard [Member] | Commercial loans [Member] | Construction commercial [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	1,338	955
Covered under loss share agreements	11,319
Substandard [Member] | Commercial loans [Member] | Land development [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	172	423
Covered under loss share agreements
Substandard [Member] | Commercial loans [Member] | Other land loans [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	309	584
Covered under loss share agreements
Substandard [Member] | Commercial loans [Member] | Commercial and industrial [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	3,033	2,679
Covered under loss share agreements	279
Substandard [Member] | Commercial loans [Member] | Multi-family residential [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	2,812	1,599
Covered under loss share agreements	1,274
Substandard [Member] | Commercial loans [Member] | Single family non-owner occupied [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	11,230	11,953
Covered under loss share agreements
Substandard [Member] | Commercial loans [Member] | Non-farm, non-residential [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	33,072	22,855
Covered under loss share agreements	18,724
Substandard [Member] | Commercial loans [Member] | Agricultural [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	35	40
Covered under loss share agreements	2
Substandard [Member] | Commercial loans [Member] | Farmland [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	2,000	538
Covered under loss share agreements	242
Substandard [Member] | Consumer real estate [Member] | Single family non-owner occupied [Member]
Company's investment in loans held for investment by internal credit grade indicator
Covered under loss share agreements	7,522
Substandard [Member] | Consumer real estate [Member] | Home equity lines [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	4,888	3,615
Covered under loss share agreements	808
Substandard [Member] | Consumer real estate [Member] | Single family owner occupied [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	32,057	29,130
Substandard [Member] | Consumer real estate [Member] | Owner occupied construction [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	253	259
Covered under loss share agreements	985
Substandard [Member] | Consumer and other loans [Member] | Consumer loans [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	659	574
Covered under loss share agreements	154
Substandard [Member] | Consumer and other loans [Member] | Other [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	7	9
Covered under loss share agreements
Doubtful [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	5,638	2,848
Covered under loss share agreements	823
Doubtful [Member] | Commercial loans [Member] | Construction commercial [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements
Covered under loss share agreements	97
Doubtful [Member] | Commercial loans [Member] | Land development [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements
Covered under loss share agreements
Doubtful [Member] | Commercial loans [Member] | Other land loans [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements
Covered under loss share agreements
Doubtful [Member] | Commercial loans [Member] | Commercial and industrial [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	4,556	2,404
Covered under loss share agreements	194
Doubtful [Member] | Commercial loans [Member] | Multi-family residential [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements
Doubtful [Member] | Commercial loans [Member] | Single family non-owner occupied [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	361
Covered under loss share agreements
Doubtful [Member] | Commercial loans [Member] | Non-farm, non-residential [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	462	444
Covered under loss share agreements	43
Doubtful [Member] | Commercial loans [Member] | Agricultural [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements
Doubtful [Member] | Commercial loans [Member] | Farmland [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements
Doubtful [Member] | Consumer real estate [Member] | Single family non-owner occupied [Member]
Company's investment in loans held for investment by internal credit grade indicator
Covered under loss share agreements	383
Doubtful [Member] | Consumer real estate [Member] | Home equity lines [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	250
Covered under loss share agreements	25
Doubtful [Member] | Consumer real estate [Member] | Single family owner occupied [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements
Doubtful [Member] | Consumer real estate [Member] | Owner occupied construction [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements
Covered under loss share agreements	16
Doubtful [Member] | Consumer and other loans [Member] | Consumer loans [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements	9
Covered under loss share agreements	65
Doubtful [Member] | Consumer and other loans [Member] | Other [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements
Covered under loss share agreements
Loss [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements
Covered under loss share agreements
Loss [Member] | Commercial loans [Member] | Construction commercial [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements
Covered under loss share agreements
Loss [Member] | Commercial loans [Member] | Land development [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements
Covered under loss share agreements
Loss [Member] | Commercial loans [Member] | Other land loans [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements
Covered under loss share agreements
Loss [Member] | Commercial loans [Member] | Commercial and industrial [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements
Covered under loss share agreements
Loss [Member] | Commercial loans [Member] | Multi-family residential [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements
Covered under loss share agreements
Loss [Member] | Commercial loans [Member] | Single family non-owner occupied [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements
Covered under loss share agreements
Loss [Member] | Commercial loans [Member] | Non-farm, non-residential [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements
Covered under loss share agreements
Loss [Member] | Commercial loans [Member] | Agricultural [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements
Covered under loss share agreements
Loss [Member] | Commercial loans [Member] | Farmland [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements
Covered under loss share agreements
Loss [Member] | Consumer real estate [Member] | Single family non-owner occupied [Member]
Company's investment in loans held for investment by internal credit grade indicator
Covered under loss share agreements
Loss [Member] | Consumer real estate [Member] | Home equity lines [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements
Covered under loss share agreements
Loss [Member] | Consumer real estate [Member] | Single family owner occupied [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements
Loss [Member] | Consumer real estate [Member] | Owner occupied construction [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements
Covered under loss share agreements
Loss [Member] | Consumer and other loans [Member] | Consumer loans [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements
Covered under loss share agreements
Loss [Member] | Consumer and other loans [Member] | Other [Member]
Company's investment in loans held for investment by internal credit grade indicator
Not covered under loss share agreements
Covered under loss share agreements

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- Definition

Aggregate gross carrying amount of loans and leases receivable covered by loss sharing agreements.

+ References

No definition available.

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X

- Definition

Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

+ References

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

-Publisher OTS

-Name Federal Regulation (FR)

-Number Title 12

-Section 563c.102

-Paragraph 8

-Subparagraph e

-Chapter V

-Subsection I

-LegacyDoc This is a non-GAAP reference that was included in the 2009 taxonomy. It will be removed from future versions of this taxonomy.



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

-Publisher AICPA

-Name Audit and Accounting Guide (AAG)

-Number AAG-DEP

-Paragraph 116

-IssueDate 2006-05-01

-Chapter 8

-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 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5074-111524



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6375948&loc=d3e4428-111522



Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Statement of Position (SOP)

-Number 01-6

-Paragraph 13

-Subparagraph e

-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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