Loans and Loans Held for Sale - Summary of Nonperforming Assets of Defaulted TDRs (Detail) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2016 USD ($) contract	Sep. 30, 2015 USD ($) contract	Sep. 30, 2016 USD ($) contract	Sep. 30, 2015 USD ($) contract
Financing Receivable, Modifications [Line Items]
Number of Defaults \| contract	0	0	0	4
Recorded Investment \| $	$ 0	$ 0	$ 0	$ 307
Commercial and Industrial
Financing Receivable, Modifications [Line Items]
Number of Defaults \| contract	0	0	0	0
Recorded Investment \| $	$ 0	$ 0	$ 0	$ 0
Commercial Real Estate
Financing Receivable, Modifications [Line Items]
Number of Defaults \| contract	0	0	0	0
Recorded Investment \| $	$ 0	$ 0	$ 0	$ 0
Commercial Construction
Financing Receivable, Modifications [Line Items]
Number of Defaults \| contract	0	0	0	0
Recorded Investment \| $	$ 0	$ 0	$ 0	$ 0
Residential Real Estate
Financing Receivable, Modifications [Line Items]
Number of Defaults \| contract	0	0	0	1
Recorded Investment \| $	$ 0	$ 0	$ 0	$ 183
Home Equity
Financing Receivable, Modifications [Line Items]
Number of Defaults \| contract	0	0	0	3
Recorded Investment \| $	$ 0	$ 0	$ 0	$ 124
Installment and Other Consumer
Financing Receivable, Modifications [Line Items]
Number of Defaults \| contract	0	0	0	0
Recorded Investment \| $	$ 0	$ 0	$ 0	$ 0
Consumer Construction
Financing Receivable, Modifications [Line Items]
Number of Defaults \| contract	0	0	0	0
Recorded Investment \| $	$ 0	$ 0	$ 0	$ 0

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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=66008989&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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