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RELATED-PARTY TRANSACTIONS - Legal Fees and Other Matters (Details) - Entity Affiliated with Former President and Chief Executive Officer $ in Thousands	1 Months Ended	3 Months Ended	9 Months Ended	15 Months Ended
	Feb. 28, 2018 letter_of_credit	Mar. 31, 2017 USD ($)	Sep. 30, 2018	Jun. 30, 2018 USD ($)	Dec. 31, 2017 letter_of_credit
Legal Fees and Credit
Related Party Transaction [Line Items]
Legal services period (more than four months)			4 months
Expenses from transactions with related parties | $		$ 330		$ 0
Number of letters of credit outstanding | letter_of_credit					3
Number of letters or credit that were canceled | letter_of_credit	3
Reimbursement of Legal Dispute
Related Party Transaction [Line Items]
Expenses from transactions with related parties | $		$ 100

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- Definition

Loans And Leases Receivable, Number Of Letters Of Credit Canceled, Related Party

+ References

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- Definition

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- Definition

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- Definition

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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