Annual report pursuant to Section 13 and 15(d)

INCOME TAXES - Summary of Effective Income Tax Rate Reconciliation (Details)

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INCOME TAXES - Summary of Effective Income Tax Rate Reconciliation (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Tax Disclosure [Abstract]      
Income tax benefit (provision) at U.S. statutory rate $ 31,871 $ 26,446 $ 80,946
Share-based compensation 0 0 0
Impairment 0 0 (27,969)
Change in U.S. tax rate 0 0 (30,562)
Change in valuation allowance due to change in U.S. tax rate 0 0 30,562
U.S. state tax 7,529 7,955 0
Change in valuation allowance (38,953) (32,086) (51,030)
Other (447) (2,125) (2,132)
Total income tax benefit (provision) $ 0 $ 190 $ (185)