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Equity - Additional Information (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Feb. 28, 2018
Share Repurchase Plan, February 2018 |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |
Common stock authorized to repurchase by Board |  |  |  |  | $ 100,000,000
Common stock repurchased (in shares) |  |  | 0 |  |
Available authorization remaining for repurchase | $ 78,000,000 |  | $ 78,000,000 |  |
Convertible Debt Securities |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |
Securities excluded in the calculation of diluted earnings per share (in shares) |  |  |  | 34,100,000 |
Equity awards |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |
Securities excluded in the calculation of diluted earnings per share (in shares) | 18,645 | 11,561 | 17,053 | 16,405 |
At The Market Offerings | Common Stock |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |
Stock issuance program, authorized amount | $ 175,000,000 |  | $ 175,000,000 |  |
Remaining capacity | $ 110,000,000 |  | $ 110,000,000 |  |
Issuance of common stock (in shares) |  |  | 0 |  |
Common Stock |  |  |  |  |
Stockholders Equity Note [Line Items] |  |  |  |  |
Issuance of common stock (in shares) |  |  | 806,068 | 350,088 |
Direct stock purchase and dividend reinvestment plan (in shares) |  |  | 0 | 0 |

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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