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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)	3 Months Ended	9 Months Ended
	Sep. 30, 2018 USD ($)	Sep. 30, 2018 USD ($) Loan	Sep. 30, 2017 USD ($) Loan
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	$ 0
Commercial
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan		2
Pre- Modification Outstanding Recorded Investment		$ 171,000
Post-Modification Outstanding Recorded Investment		$ 163,000
Commercial | Commercial and industrial
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan		2
Pre- Modification Outstanding Recorded Investment		$ 171,000
Post-Modification Outstanding Recorded Investment		$ 163,000
Consumer
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan			3
Pre- Modification Outstanding Recorded Investment			$ 2,416,000
Post-Modification Outstanding Recorded Investment			$ 2,433,000
Consumer | Single family residential mortgage
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan			3
Pre- Modification Outstanding Recorded Investment			$ 2,416,000
Post-Modification Outstanding Recorded Investment			$ 2,433,000

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Number of financing receivables that have been modified by troubled debt restructurings.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
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-Topic 310
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-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
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