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Related Party Transactions (Construction Management Firm and CCI) (Narrative) (Details) - CCI - Equipment - Immediate Family Member of Management - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020
Related Party Transaction [Line Items] |  |  |  |  |
Payments, net of rebates, related party | $ 5.6 | $ 1.0 | $ 10.7 | $ 1.4 |
Payables, related party | $ 5.1 |  | $ 5.1 |  | $ 4.2

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