Quarterly report pursuant to Section 13 or 15(d)

BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)

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BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Error Corrections and Prior Period Adjustments Restatement [Line Items]    
Net cash provided by (used in) operating activities $ 617,355 $ 630,797
Adjusted to increase net cash flows provided by investing activities (638,648) $ (554,586)
Misclassification between Operation and Financing Activities    
Error Corrections and Prior Period Adjustments Restatement [Line Items]    
Net cash provided by (used in) operating activities 21,800  
Adjusted to increase net cash flows provided by investing activities $ 21,800