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Investments in and Advances to Joint Ventures - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Letters of credit outstanding amount | $ 221.2 |  | $ 221.2 |  | $ 193.1
Write-down on unconsolidated joint venture | 5.5 |  | 10.6 |  |
Decrease in operating income | 5.5 |  | 10.6 |  |
Decrease in net income net of tax | $ 4.1 |  | $ 7.9 |  |
Decrease in earnings per share diluted | $ 0.04 |  | $ 0.07 |  |
Unconsolidated Joint Ventures |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Net distributions from (contributions to) unconsolidated joint ventures | $ (7.3) | $ 11.2 | $ (0.5) | $ 23.2 |
Consolidated Joint Ventures |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Letters of credit outstanding amount | $ 75.0 |  | $ 75.0 |  | $ 59.3

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