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Revenue - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |  |
Unbilled receivables, net | $ 41,859 |  | $ 41,859 |  | $ 46,279
Contract with customer, liability | 10,900 |  | 10,900 |  | $ 5,000
Contract with customer, liability, revenue recognized |  |  | 1,500 | $ 2,000 |
Revenue, remaining performance obligation | $ 171,000 |  | $ 171,000 |  |
Sales Revenue, Net | Product Concentration Risk | Transferred at Point in Time |  |  |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |  |
Concentration risk, percentage | 50.00% | 43.00% | 50.00% | 43.00% |
Sales Revenue, Net | Product Concentration Risk | Transferred over Time |  |  |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |  |
Concentration risk, percentage | 50.00% | 57.00% | 50.00% | 57.00% |

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