Tax Receivable Agreement - Summary of Activity (Details) $ in Thousands |
3 Months Ended |
|---|---|
|
Mar. 31, 2018
USD ($)
| |
| Income Tax Disclosure [Abstract] | |
| Balance December 31, 2017 | $ 124,360 |
| Exchange of Class B units for Class A shares | 400 |
| Reduction of future payments due to the Buyout | (46,371) |
| Balance March 31, 2018 | $ 78,389 |