Loans - Troubled Debt Restructurings that Defaulted Subsequent to Modifications Occurring Within Previous Twelve Months, Disaggregated by Loan Class (Detail) $ in Thousands	12 Months Ended
Dec. 31, 2015 USD ($) SecurityLoan	Dec. 31, 2014 USD ($) SecurityLoan	Dec. 31, 2013 USD ($) SecurityLoan
Financing Receivable, Modifications [Line Items]
Number of Loans \| SecurityLoan	2	6	4
Recorded Investment \| $	$ 590	$ 3,561	$ 338
Real estate loans [Member] \| Retail [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans \| SecurityLoan	0	1	0
Recorded Investment \| $	$ 0	$ 1,856	$ 0
Real estate loans [Member] \| Gas station [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans \| SecurityLoan	0	0	1
Recorded Investment \| $	$ 0	$ 0	$ 90
Real estate loans [Member] \| Other [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans \| SecurityLoan	1	3	1
Recorded Investment \| $	$ 412	$ 1,352	$ 125
Commercial and industrial loans [Member] \| Commercial term [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans \| SecurityLoan	1	0	2
Recorded Investment \| $	$ 178	$ 0	$ 123
Commercial and industrial loans [Member] \| Commercial lines of credit [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans \| SecurityLoan	0	2	0
Recorded Investment \| $	$ 0	$ 353	$ 0

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No definition available.

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- Definition

Number of financing receivables that have been modified by troubled debt restructurings within the previous 12 months and for which there was a payment default.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953682-111524

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- Definition

Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which there was a payment default.

+ References

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