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Revenue Recognition - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |
Unbilled receivables, net | $ 46,279 | $ 41,255 |
Contract with customer, liability | 5,000 | 5,000 |
Contract with customer, liability, revenue recognized | $ 2,200 | $ 7,900 |
Concentration risk, percentage | 100.01% | 100.00% | 100.00%
Revenue, remaining performance obligation, amount | $ 213,000 |  |
Product Concentration Risk | Transferred over Time | Revenue Benchmark |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |
Concentration risk, percentage | 57.00% | 57.00% |
Product Concentration Risk | Transferred at Point in Time | Revenue Benchmark |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |
Concentration risk, percentage | 43.00% | 43.00% |

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