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Net Income per Share - Narrative (Details) - USD ($) $ in Millions |  | 3 Months Ended
--- | --- | ---
Feb. 13, 2020 | Mar. 31, 2020 | Mar. 31, 2019
Class of Stock [Line Items] |  |  |
Dilutive awards (in shares) |  | 167,000 | 119,000
2016 Equity Plan |  |  |
Class of Stock [Line Items] |  |  |
Dilutive awards (in shares) |  | 55,329 |
Phantom Share Units (PSUs) | 2016 and 2017 Equity Plans |  |  |
Class of Stock [Line Items] |  |  |
Settlement period |  | 5 years |
Phantom Share Units (PSUs) | 2016 Equity Plan |  |  |
Class of Stock [Line Items] |  |  |
Common stock shares contingently issuable (in shares) |  | 43,580 |
Restricted Stock Units (RSUs) | 2017 Equity Plan |  |  |
Class of Stock [Line Items] |  |  |
Common stock shares contingently issuable (in shares) |  | 13,157 |
Restricted Stock Units (RSUs) | 2017 Equity Plan, 2019 Award |  |  |
Class of Stock [Line Items] |  |  |
Restricted stock unit awards awarded (in shares) | 420,303 |  |
Stock compensation expense |  | $ 0.5 |
Restricted Stock Units (RSUs) | 2017 Equity Plan, Additional 2019 Award |  |  |
Class of Stock [Line Items] |  |  |
Shares to be issued upon settlement of awards (in shares) |  | 141,243 |
Dilutive awards (in shares) |  | 87,879 |
Service-based RSUs | 2016 Equity Plan |  |  |
Class of Stock [Line Items] |  |  |
RSUs excluded from computation of earnings per share (in shares) |  | 73,429 |
Service-based RSUs | 2017 Equity Plan |  |  |
Class of Stock [Line Items] |  |  |
RSUs excluded from computation of earnings per share (in shares) |  | 248,294 |
Dilutive awards (in shares) |  | 23,295 |
Service-based RSUs | 2017 Equity Plan, 2019 Award |  |  |
Class of Stock [Line Items] |  |  |
Vesting period |  | 3 years |
Performance and market-based RSUs | 2017 Equity Plan |  |  |
Class of Stock [Line Items] |  |  |
RSUs excluded from computation of earnings per share (in shares) |  | 454,130 |
Performance and market-based RSUs | 2017 Equity Plan, 2019 Award |  |  |
Class of Stock [Line Items] |  |  |
Vesting period |  | 3 years |

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