LOANS AND LEASES AND ALLOWANCE FOR LOAN AND LEASE LOSSES - Allowance for Loan and Lease Losses Additional Information (Details) $ in Millions	3 Months Ended	12 Months Ended
Jun. 30, 2017 USD ($) rolling_quarter	Mar. 31, 2017 rolling_quarter	Dec. 31, 2016 USD ($) rolling_quarter
Accounts, Notes, Loans and Financing Receivable [Line Items]
Credit risk monitoring look back period \| rolling_quarter	37	36	28
Unfunded Loan Commitment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unfunded loan commitments \| $	$ 4.0		$ 2.4

A valuation allowance for financing receivables that are expected to be uncollectible.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

Name:	us-gaap_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant