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BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2019 USD ($) segment Country | Jan. 01, 2019 USD ($)
Accounting Policies [Abstract] |  |
Number of countries in which entity operates | Country | 32 |
Number of reportable segments | segment | 3 |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Total operating lease liabilities | $ 259,340 | $ 274,036
Operating lease right-of-use assets | $ 219,006 | 235,979
Accounting Standards Update 2016-02 |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Total operating lease liabilities |  | 274,000
Operating lease right-of-use assets |  | $ 236,000

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