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Consolidated Statements of Total Equity (Unaudited) (Parenthetical) - shares | 3 Months Ended |  |  |
--- | --- | --- | --- | ---
Mar. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2020 | Mar. 31, 2020 | Sep. 30, 2019
At-the-market Equity Offering Program, Common Stock Issued | 1,000,000.0 |  |  |  |  |
Common Stock [Member] |  |  |  |  |  |
Common Stock, Shares, Outstanding | 49,124,801 | 48,076,643 | 48,025,359 | 48,061,921 | 48,025,359 | 47,997,366
Stock issued under employee incentive plans (shares) | 29,655 | 14,722 | 27,993 |  |  |
At-the-market Equity Offering Program, Common Stock Issued | 1,018,503 |  |  |  |  |

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