Common Stock - Narrative (Details) - USD ($) $ in Thousands |
1 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Mar. 31, 2018 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
|
| Class of Stock [Line Items] | ||||
| Common stock, outstanding (in shares) | 68,358,074 | 66,318,849 | ||
| Common stock sold excluding overallotment shares (in shares) | 3,700,000 | |||
| Common stock offered and sold (in shares) | 4,300,000 | |||
| Proceeds from issuance of common stock | $ 79,200 | $ 0 | $ 79,165 | $ 0 |
| Overallotment Option | ||||
| Class of Stock [Line Items] | ||||
| Overallotment option included in sale of stock (percent) | 15.00% | |||