REVENUE (Tables) |
12 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2020 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Revenue from Contract with Customer [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Sales and usage-based taxes are excluded from revenues. No sales to an individual customer or in a country other than the United States accounted for 10% or more of the sales for the periods listed on the following table. Revenue, classified by the major geographic areas in which our customers are located, was as follows: |
Sales and usage-based taxes are excluded from revenues. No sales to an individual customer or in a country other than the United States accounted for 10% or more of the sales for the periods listed on the following table. Revenue, classified by the major geographic areas in which our customers are located, was as follows: |
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| REVENUE |
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| REVENUE (Details 2) |
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| Deferred revenue recognized for the year ended December 31, 2020 and 2019 was $173.2 million and $165.0 million, respectively. Changes in unearned revenue were as follows: |
Deferred revenue recognized for the year ended December 31, 2020 and 2019 was $173.2 million and $165.0 million, respectively. Changes in unearned revenue were as follows: |
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| REVENUE (Details 3) |
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