Nonaccrual, Restructured and Impaired Loans (Detail) (Non Covered Loans, USD $) In Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2011	Jun. 30, 2011	Dec. 31, 2010
Financing Receivable, Modifications [Line Items]
Nonaccrual loans	$ 56,536	$ 56,536	$ 62,302
Restructured loans	17,482	17,482	17,613
Total	74,018	74,018	79,915
Less: restructured loans - accruing	(3,039)	(3,039)	(3,508)
Total impaired loans	70,979	70,979	76,407
Interest income effect
Gross amount of interest that would have been recorded under original terms	1,304	2,713
Interest included in income
Nonaccrual loans	105	250
Restructured loans	84	166
Total interest included in income	189	416
Net impact on interest income	1,115	2,297
Real estate-construction
Financing Receivable, Modifications [Line Items]
Nonaccrual loans	13,237	13,237	12,921
Commercial
Financing Receivable, Modifications [Line Items]
Nonaccrual loans	9,811	9,811	13,729
Real estate-commercial
Financing Receivable, Modifications [Line Items]
Nonaccrual loans	26,213	26,213	28,342
Real estate-residential
Financing Receivable, Modifications [Line Items]
Nonaccrual loans	4,564	4,564	4,607
Installment
Financing Receivable, Modifications [Line Items]
Nonaccrual loans	335	335	150
Home equity
Financing Receivable, Modifications [Line Items]
Nonaccrual loans	$ 2,376	$ 2,376	$ 2,553

Financing Receivable, Impaired, Interest Income Lost on Nonaccrual and Restructured Loans

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Financing Receivable, Impaired, Interest Income Recorded on Nonaccrual and Restructured Loans

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Financing Receivable, Impaired, Interest Income Recorded on Nonaccrual Loans

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Financing Receivable, Impaired, Interest Income Recorded on Restructured Loans

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Financing Receivable, Impaired, Interest Income that would have been recorded

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Financing Receivable, Modifications, Recorded Investment, Accrual Status

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Financing Receivable, Recorded Investment, Modifications and Nonaccrual Status

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Total Impaired Loans

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The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 32
-URI http://asc.fasb.org/extlink&oid=6965416&loc=SL6953670-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=6965416&loc=SL6953676-111524

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6951948&loc=d3e18845-111554

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Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6965416&loc=d3e5111-111524
-Subparagraph (d)

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