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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) - Consumer $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017 USD ($) Loan	Sep. 30, 2016 USD ($) Loan	Sep. 30, 2017 USD ($) Loan	Sep. 30, 2016 USD ($) Loan
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan	0	1	3	41
Pre- Modification Outstanding Recorded Investment	$ 0	$ 522	$ 2,416	$ 10,070
Post-Modification Outstanding Recorded Investment	$ 0	$ 519	$ 2,433	$ 10,067
Single family residential mortgage
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan	0	1	3	41
Pre- Modification Outstanding Recorded Investment	$ 0	$ 522	$ 2,416	$ 10,070
Post-Modification Outstanding Recorded Investment	$ 0	$ 519	$ 2,433	$ 10,067

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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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- Definition

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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