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INVESTMENTS (Available For Sale Securities) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 10,800	$ 10,800
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(730)	(730)
Fair Value	10,070	10,070
Aggregate Fair Value	10,070	10,070
Gross Unrealized Losses	(730)	(730)
Auction Rate Securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	10,800	10,800
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(730)	(730)
Fair Value	10,070	10,070
Aggregate Fair Value	10,070	10,070
Gross Unrealized Losses	$ (730)	$ (730)

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- Definition

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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