Equity Incentive Plan - Assumptions used to estimate fair value of performance unit awards (Details) - $ / shares |
3 Months Ended | |
---|---|---|
Mar. 31, 2021 |
Mar. 05, 2021 |
|
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Closing stock price (USD per share) | $ 34.24 | |
Performance unit awards | March 9, 2021 | ||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
Remaining performance period | 2 years 9 months 21 days | |
Risk-free interest rate (as a percent) | 0.32% | |
Dividend yield (as a percent) | 0.00% | |
Expected volatility (as a percent) | 114.60% | |
Closing stock price (USD per share) | $ 34.66 |