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Loans - Restructured in Troubled Debt (Detail) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015 USD ($) Loans	Dec. 31, 2014 USD ($) Loans
Financing Receivable, Modifications [Line Items]
Number of Loans | Loans	15	15
Loan Balance	$ 17,203	$ 18,658
Specific Reserve	$ 3,112	$ 2,670
Commercial, Industrial, and Agricultural [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | Loans	7	7
Loan Balance	$ 3,983	$ 3,920
Specific Reserve	$ 661	$ 179
Commercial Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | Loans	8	8
Loan Balance	$ 13,220	$ 14,738
Specific Reserve	$ 2,451	$ 2,491
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | Loans	0	0
Loan Balance	$ 0	$ 0
Specific Reserve	$ 0	$ 0
Consumer [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | Loans	0	0
Loan Balance	$ 0	$ 0
Specific Reserve	$ 0	$ 0
Credit Cards [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | Loans	0	0
Loan Balance	$ 0	$ 0
Specific Reserve	$ 0	$ 0

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- Definition

Financing receivable modifications specific reserve.

+ References

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- Definition

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+ References

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- Definition

Number of 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 33



-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953676-111524

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- Definition

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 40



-Section 50



-Paragraph 4



-URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554

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