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v3.19.1

Revenue Recognition (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 | Dec. 31, 2018
Contract with Customer, Asset, Gross | $ 629,435 | $ 673,616
Contract with Customer, Liability, Current | 15,995 | $ 19,566
Contract with Customer, Liability, Revenue Recognized | 8,000 |
Revenue, Remaining Performance Obligation, Amount | $ 28,000 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 2 years |
Minimum [Member] |  |
License Agreement, Term of Agreement | 1 year |
Long-Duration Contracts, Assumptions by Product and Guarantee, Discount Rate | 3.00% |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 1 year |
Maximum [Member] |  |
License Agreement, Term of Agreement | 7 years |
Long-Duration Contracts, Assumptions by Product and Guarantee, Discount Rate | 6.00% |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 3 years |

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