INVESTMENTS (Net Unrealized Gains (Losses) Still Held (Details) - Equity Securities - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Equity Securities, FV-NI, Gain (Loss), Total	$ (4,063)	$ 2,384
Less: Net realized and unrealized gains (losses)	(635)	326
Net unrealized gains (losses) still held as of the end-of-period	$ (3,428)	$ 2,058

Amount of unrealized and realized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 321
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=116654751&loc=SL75117546-209714

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