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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Loans and Leases (Details)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Threshold period past due for nonperforming status of financing receivables	90 days
Threshold period past due for write-off of financing receivable	180 days

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- Definition

Threshold Period Past Due for Nonperforming Status of Financing Receivables

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

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- References

No definition available.

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- Definition

Threshold period past due for financing receivable to write off as uncollectible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_ThresholdPeriodPastDueForWriteoffOfFinancingReceivable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration