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LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Loans and Leases by Class Modified as Troubled Debt Restructurings (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) Loan	Mar. 31, 2017 USD ($) Loan
Commercial
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan	2
Post-Modification Outstanding Recorded Investment	$ 163
Commercial | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan	2	0
Pre- Modification Outstanding Recorded Investment	$ 171	$ 0
Post-Modification Outstanding Recorded Investment	$ 163	$ 0
Consumer
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan	2	2
Pre- Modification Outstanding Recorded Investment	$ 171	$ 1,266
Post-Modification Outstanding Recorded Investment	$ 163	$ 1,273
Consumer | Single family residential mortgage
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan	0	2
Pre- Modification Outstanding Recorded Investment	$ 0	$ 1,266
Post-Modification Outstanding Recorded Investment	$ 0	$ 1,273

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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=84173941&loc=SL6953676-111524

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Post-modification amount of investment in financing receivables 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=84173941&loc=SL6953676-111524

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Pre-modification amount of investment in financing receivables 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=84173941&loc=SL6953676-111524

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