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NEW ACCOUNTING STANDARDS - CUMULATIVE EFFECT OF CHANGES DUE TO ADOPTION OF ASU 2014-09 (TABLES) (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Jan. 01, 2018 | Dec. 31, 2017
--- | --- | --- | ---
ASSETS. |  |  |
Prepaids and other current assets | $ 86,054 | $ 74,465 | $ 63,668
Deferred tax assets, net, noncurrent | 22,335 | 16,018 | 12,012
LIABILITIES. |  |  |
Deferred revenue | 33,555 | 46,413 | 21,628
Retained earnings | $ 705,218 | $ 711,682 | $ 721,664

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