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Condensed Consolidated Financial Statements - Summary of Other Current Liabilities (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Other Current Liabilities    
Operating lease liabilities $ 15,112 $ 0
Vendor financed licenses 8,217 3,551
Royalties payable 6,643 11,318
Accrued interest 3,606 8,407
Other 36,101 38,412
Total other current liabilities $ 69,679 $ 61,688