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Balance and Interest Income Related to Impaired Loan Pools (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Financing Receivable, Recorded Investment [Line Items]
Interest income recognized	$ 169	$ 128	$ 555	$ 523
PCI loans
Financing Receivable, Recorded Investment [Line Items]
Interest income recognized	12	96	130	273
TDRs | PCI loans
Financing Receivable, Recorded Investment [Line Items]
Interest income recognized	$ 143	$ 148	$ 296	$ 456

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5212-111524

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- Details

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