Schedule of Stock-Based Compensation Expense Expected to be Recognized (Details) - RSUs $ in Thousands	Dec. 31, 2017 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award
2018	$ 14,641
2019	9,232
2020	6,020
2021	3,249
2022	345
Total unrecognized compensation expense	$ 33,487

As of the balance-sheet date, the aggregate unrecognized cost of equity awards made with employees, directors and certain consultants qualifying for treatment as employees under share-based compensation plans that have yet to vest expected to be recognized during year five of the five succeeding fiscal years.

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