Commitments and Contingencies - Summary of Company's Exit Liability Activity (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| Organization Consolidation And Presentation Of Financial Statements [Abstract] | |||
| Beginning balance | $ 779 | $ 2,085 | |
| Change in estimated loss from exit | 1,120 | 525 | $ 3,804 |
| Non-cash adjustment | 1,120 | ||
| Amortization of liability | (1,052) | (1,831) | (2,839) |
| Ending balance | $ 847 | $ 779 | $ 2,085 |