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REVENUE FROM CONTRACTS WITH CUSTOMERS Table 2 - Contract Assets and Liabilities (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2018
USD ($)
Contract assets  
Balance as of January 1, 2018 $ 2,127
Additions 1,086
Transfer to accounts receivable (2,576)
Total activity (1,490)
Balance as of September 30, 2018 637
Less current portion 227
Noncurrent portion 410
Contract liabilities  
Balance as of January 1, 2018 (60,464)
Additions (64,492)
Transfer to revenues 42,417
Total activity (22,075)
Balance as of September 30, 2018 (82,539)
Less current portion (45,456)
Noncurrent portion $ (37,083)