Revenue from Contracts with Customers - Revenue by sales channel (Details) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
|
| Disaggregation of Revenue [Line Items] | ||||
| Revenues | $ 230,828 | |||
| Direct | ||||
| Disaggregation of Revenue [Line Items] | ||||
| Revenues | $ 139,908 | |||
| Partner | ||||
| Disaggregation of Revenue [Line Items] | ||||
| Revenues | $ 90,920 | |||
| ASC 606 | ||||
| Disaggregation of Revenue [Line Items] | ||||
| Revenues | $ 321,607 | |||
| ASC 606 | Direct | ||||
| Disaggregation of Revenue [Line Items] | ||||
| Revenues | 186,130 | |||
| ASC 606 | Partner | ||||
| Disaggregation of Revenue [Line Items] | ||||
| Revenues | $ 135,477 | |||
| Operating Lease Expected Revenue | ||||
| Disaggregation of Revenue [Line Items] | ||||
| Revenues | $ 278,889 | |||
| Operating Lease Expected Revenue | Direct | ||||
| Disaggregation of Revenue [Line Items] | ||||
| Revenues | 164,084 | |||
| Operating Lease Expected Revenue | Partner | ||||
| Disaggregation of Revenue [Line Items] | ||||
| Revenues | $ 114,805 | |||