EMPLOYEE BENEFIT PLANS - Estimate Amounts of Amortized Transition Obligation (Details) $ in Thousands	Dec. 31, 2018 USD ($)
Retirement Benefits [Abstract]
Transition obligation	$ (4)

Amount included in accumulated other comprehensive income (loss) for transition asset (obligation) expected to be recognized in net periodic benefit (cost) credit for fiscal year following most recent annual statement of financial position.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (s)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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