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LOANS AND ALLOWANCE FOR LOAN LOSSES - Loans and Leases by Class Modified as Troubled Debt Restructurings (Detail) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($) loan	Jun. 30, 2018 USD ($) loan	Jun. 30, 2019 USD ($) loan	Jun. 30, 2018 USD ($) loan
Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	12	0	12	2
Pre- Modification Outstanding Recorded Investment		$ 0		$ 171
Post-Modification Outstanding Recorded Investment	$ 17,889	$ 0	$ 17,889	$ 163
Commercial | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	10	0	10	2
Pre- Modification Outstanding Recorded Investment	$ 17,339	$ 0	$ 17,339	$ 171
Post-Modification Outstanding Recorded Investment	$ 17,020	$ 0	$ 17,020	$ 163
Commercial | SBA
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	2		2
Pre- Modification Outstanding Recorded Investment	$ 3,214		$ 3,214
Post-Modification Outstanding Recorded Investment	$ 869		$ 869
Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	12		12
Pre- Modification Outstanding Recorded Investment	$ 20,553		$ 20,553
Post-Modification Outstanding Recorded Investment	$ 17,889		$ 17,889
Consumer | Single family residential mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	0		0
Pre- Modification Outstanding Recorded Investment	$ 0		$ 0
Post-Modification Outstanding Recorded Investment	$ 0		$ 0

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

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524

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Amount, after troubled debt restructuring, of modified financing receivable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524

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Amount, before troubled debt restructuring, of financing receivable to be modified.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524

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