Consolidated balance sheets (Parenthetical) - $ / shares |
Mar. 31, 2020 |
Mar. 31, 2019 |
Dec. 31, 2018 |
|---|---|---|---|
| Statement of Financial Position [Abstract] | |||
| Common stock, par value (in USD per share) | $ 0.01 | $ 0.01 | $ 0.01 |
| Common stock, shares authorized (in shares) | 250,000,000 | 250,000,000 | 250,000,000 |
| Common stock, shares issued (in shares) | 50,003,531 | 49,645,450 | 48,715,276 |
| Common stock, shares outstanding (in shares) | 50,003,531 | 49,645,450 | 48,715,276 |