Regulatory Matters - Additional Information (Detail)	12 Months Ended
Jun. 30, 2012 Day	Jun. 30, 2011	Dec. 31, 2010
Rate And Regulatory Matters [Line Items]
Tangible capital to adjusted total assets ratio	1.50%	1.50%
Tier 1 (Core) Capital to adjusted total assets ratio	4.00%	4.00%
Tier 1 (Core) Capital to risk weighted assets ratio	4.00%	4.00%
Total Capital to risk weighted assets ratio	8.00%	8.00%
Total capital to risk weighted assets required under regulatory bank order	12.00%	12.00%
Due date on capital requirements of bank	15
Percentage of reduction on classified assets and allowance for loan and lease losses			50.00%
Percentage of reduction on classified and designated assets and allowance for loan and lease losses			65.00%
Percentage of profitability on classified assets to core capital and allowance for loan and lease losses	48.20%
Percentage of profitability on classified and designated assets and allowance for loan and lease losses	55.00%
Percentage of bank order on classified assets to core capital and allowance for loan and lease losses	50.00%
Percentage of bank order on classified and designated assets and allowance for loan and lease losses	65.00%

Bank Capital Requirements, Due Date

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Percentage Of Bank Order On Classified And Designated Assets And Allowance For Loan And Lease Losses

+ References

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- Definition

Percentage Of Bank Order On Classified Assets To Core Capital And Allowance For Loan And Lease Losses

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- Definition

Percentage Of Classified And Designated Assets And Allowance For Loan And Lease Losses

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- Definition

Percentage Of Classified Assets And Allowance For Loan And Lease Losses

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- Definition

Percentage Of Profitability On Classified And Designated Assets And Allowance For Loan And Lease Losses

+ References

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- Definition

Percentage Of Profitability On Classified Assets To Core Capital And Allowance For Loan And Lease Losses

+ References

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- Definition

Total Capital To Risk Weighted Assets Required Under Regulatory

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- Definition

The minimum Total risk based capital ratio (total capital divided by risk weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action.

+ References

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

-Publisher AICPA

-Name Audit and Accounting Guide (AAG)

-Number AAG-DEP

-Paragraph 22

-IssueDate 2006-05-01

-Chapter 17

-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 942

-SubTopic 505

-Section 50

-Paragraph 1B

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-Publisher AICPA

-Name Audit and Accounting Guide (AAG)

-Number AAG-DEP

-Paragraph 15

-Subparagraph 3a

-IssueDate 2006-05-01

-Chapter 17

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 505

-Section 50

-Paragraph 1

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- Definition

The minimum amount of Tangible Capital divided by tangible assets (Tangible Capital Ratio) as defined in the regulations.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 505

-Section 50

-Paragraph 1B

-URI http://asc.fasb.org/extlink&oid=7881181&loc=SL5958570-112826

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 505

-Section 50

-Paragraph 1H

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=7881181&loc=d3e65071-112826

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

-Publisher AICPA

-Name Audit and Accounting Guide (AAG)

-Number AAG-DEP

-Paragraph 15

-Subparagraph 3a

-IssueDate 2006-05-01

-Chapter 17

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 505

-Section 50

-Paragraph 1

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=7881181&loc=SL5958568-112826

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- Definition

The minimum amount of Tier 1 Leverage Capital for capital adequacy purposes divided by average assets as defined in the regulations.

+ References

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- Definition

The minimum Tier One Capital Ratio (Tier one capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action.

+ References

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