RELATED PARTY TRANSACTIONS (Details)	12 Months Ended
Dec. 31, 2020 USD ($) shareholder	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
RELATED PARTY TRANSACTIONS
Capital expenditures	$ 402,700,000	$ 464,300,000
Vendor
RELATED PARTY TRANSACTIONS
Stock holders investment percentage	1.00%
Payment to vendor for product and subscription purchases	$ 400,000	600,000	$ 600,000
Due to Related Parties	$ 0	9,000
Shareholders and minority owners
RELATED PARTY TRANSACTIONS
Number of shareholders are minority owners in VIE \| shareholder	2
Revenue from related parties	$ 200,000	400,000	700,000
Accounts receivable due from related parties	16,000	24,000
Partially owned employee and shareholder
RELATED PARTY TRANSACTIONS
Revenue from related parties			1,000,000.0
Capital expenditures			800,000
Gain on sale of equipment			200,000
Stockholder's Spouse
RELATED PARTY TRANSACTIONS
Revenue from related parties	100,000	1,800,000	$ 100,000
Accounts receivable due from related parties	$ 37,000	$ 19,000

Number of shareholders who are minority owners.

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