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LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Summary of TDR Modification Type (Details) - 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
Post-Modification Outstanding Recorded Investment | $	$ 0	$ 519	$ 2,433	$ 10,067
Change in Principal Payments and Interest Rates
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan		0	2	34
Post-Modification Outstanding Recorded Investment | $		$ 0	$ 1,290	$ 8,622
Change in Principal Payments
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan		0	1	4
Post-Modification Outstanding Recorded Investment | $		$ 0	$ 1,143	$ 780
Change in Interest Rates
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan		0	0	2
Post-Modification Outstanding Recorded Investment | $		$ 0	$ 0	$ 146
Bankruptcy Discharges
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan		1	0	1
Post-Modification Outstanding Recorded Investment | $		$ 519	$ 0	$ 519
Single family residential mortgage
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan	0	1	3	41
Post-Modification Outstanding Recorded Investment | $	$ 0	$ 519	$ 2,433	$ 10,067
Single family residential mortgage | Change in Principal Payments and Interest Rates
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan		0	2	34
Post-Modification Outstanding Recorded Investment | $		$ 0	$ 1,290	$ 8,622
Single family residential mortgage | Change in Principal Payments
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan		0	1	4
Post-Modification Outstanding Recorded Investment | $		$ 0	$ 1,143	$ 780
Single family residential mortgage | Change in Interest Rates
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan		0	0	2
Post-Modification Outstanding Recorded Investment | $		$ 0	$ 0	$ 146
Single family residential mortgage | Bankruptcy Discharges
Financing Receivable, Modifications [Line Items]
Number of Loans | Loan		1	0	1
Post-Modification Outstanding Recorded Investment | $		$ 519	$ 0	$ 519

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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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