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BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) segment Country	Jan. 01, 2018 USD ($)	Dec. 31, 2017 USD ($)
Accounting Policies [Abstract]
Number of countries in which entity operates | Country	30
Number of reportable segments | segment	3
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Retained earnings	$ 1,738,545		$ 1,597,897
Other noncurrent assets	323,019		207,297
Deferred income tax liabilities	452,470		$ 436,879
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Retained earnings	(58,734)	$ 51,000
Other noncurrent assets	(73,247)	64,600
Deferred income tax liabilities	$ (15,735)	$ 15,600

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