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INCOME TAXES - Consolidated Income (loss) Before Income Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Income Tax Disclosure [Abstract]      
Domestic $ 94,978 $ 121,897 $ 185,042
Foreign 1,026 641 375
Income before income tax $ 96,004 $ 122,538 $ 185,417