COMMITMENTS AND CONTINGENCIES COMMITMENTS AND CONTINGENCIES (Narrative) (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Legal Proceedings [Line Items]
Contractual Amounts Of Financial Instrument	$ 769,370,000	$ 739,860,000
Loss Contingency Accrual	0	0
Cancellable Commitment [Member]
Legal Proceedings [Line Items]
Contractual Amounts Of Financial Instrument	$ 272,500,000	$ 274,600,000

Amount of loss contingency liability.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349

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