ADOPTION OF NEW ACCOUNTING STANDARDS - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Jun. 30, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification from AOCI, Current Period, Stranded Tax Effects ASU 2018-02, Tax		$ 161
Amortization	$ 6,500	13,300
Accounting Standards Update 2016-18
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase to net cash used in operating activities			$ 500
Other Current Assets
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred Costs	3,400	3,400
Other Noncurrent Assets
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred Costs	$ 11,500	$ 11,500