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RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS - Additional Information (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Jan. 01, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Retained earnings | $ 3,437,093 | $ 3,190,578 |  |
Excess tax benefit on stock-based compensation | 13,657 | $ 18,462 | $ 8,548 |
Accounting Standards Update 2016-09 |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Excess tax benefit on stock-based compensation | $ 13,700 |  |  |
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09 | Pro Forma |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Retained earnings |  |  |  | $ 10,000

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