Other Intangible Assets, Net - Narrative (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | |||
---|---|---|---|---|---|
Jun. 30, 2018 |
Jun. 30, 2017 |
Jun. 30, 2018 |
Jun. 30, 2017 |
Dec. 31, 2017 |
|
Acquired Finite-Lived Intangible Assets [Line Items] | |||||
Increase in finite-lived intangible assets | $ 5,747 | $ 5,747 | $ 4,351 | ||
Amortization of other intangible assets | 400 | $ 300 | $ 800 | $ 600 | |
Intangible asset, weighted average amortization period | 3 years 9 months 15 days | ||||
Customer and Contractual Relationships | |||||
Acquired Finite-Lived Intangible Assets [Line Items] | |||||
Increase in finite-lived intangible assets | 276 | $ 276 | 371 | ||
Internal-use software | |||||
Acquired Finite-Lived Intangible Assets [Line Items] | |||||
Increase in finite-lived intangible assets | $ 5,471 | $ 5,471 | $ 3,980 |