STOCK-BASED COMPENSATION (Compensation Expense Related to Stock Options and Their Intrinsic Values) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Sep. 30, 2018	Dec. 31, 2019	Dec. 31, 2017
STOCK-BASED COMPENSATION [Abstract]
Intrinsic value of stock options exercised	$ 59,345	$ 31,315	$ 12,217
Stock-based compensation expense	21,899	26,085	14,686
Net stock-based compensation capitalized into inventory	320	331	196
Total stock-based compensation cost	$ 22,219	$ 26,416	$ 14,882

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount of cost capitalized for award under share-based payment arrangement.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Amount of cost expensed and capitalized for award under share-based payment arrangement.

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