v3.19.3

REVENUE - Deferred Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Jun. 30, 2019 | Dec. 31, 2018 | Jun. 30, 2018 | Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |
Deferred revenue | $ 45,263 | $ 33,614 | $ 45,263 | $ 33,614 | $ 44,812 | $ 36,451 | $ 27,155 | $ 1,590
Deferred revenue arising from business combination | 0 | 22,800 | 0 | 22,800 |  |  |  |
Revenue recognized in the period from amounts included in deferred revenue at the beginning of the period | $ 12,656 | $ 10,165 | $ 28,280 | $ 1,539 |  |  |  |
Balances without adoption of ASC 606 |  |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |
Deferred revenue |  |  |  |  | 44,812 | 36,451 | 27,155 | 5,893
Accounting Standards Update 2014-09 | Effect of change |  |  |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |  |  |
Deferred revenue |  |  |  |  | $ 0 | $ 0 | $ 0 | $ (4,303)

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