Condensed Consolidated Financial Statements - Summary of Other Current Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Other Current Liabilities
Operating lease liabilities	$ 15,193	$ 0
Vendor financed licenses	13,574	3,551
Accrued interest	9,660	8,407
Royalties payable	5,693	11,318
Other	37,036	38,412
Total other current liabilities	$ 81,156	$ 61,688

Carrying value as of the balance sheet date of obligations incurred through that date and payable for royalties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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