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Investments in and Advances to Joint Ventures - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Schedule Of Equity Method Investments [Line Items] |  |  |
Letters of credit outstanding amount | $ 193.1 | $ 197.3 |
Write-down on unconsolidated joint venture | $ 15.5 |  |
Decrease in operating and net income net of tax percentage | 25.40% |  |
Decrease in operating income | $ 15.5 |  |
Decrease in net income net of tax | $ 11.5 |  |
Decrease in earnings per share diluted | $ 0.11 |  |
Unconsolidated Joint Ventures |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |
Net distributions from unconsolidated joint ventures | $ 30.5 | 38.9 | $ 41.9
Consolidated Joint Ventures |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |
Letters of credit outstanding amount | $ 59.3 | $ 55.0 |

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