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Related Party Transactions - Management/Subcontracting agreement - Narrative (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2021 | Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020 | Jun. 30, 2020
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Line of credit facility, letters of credit issued |  | $ 134,900 |  | $ 134,900 |  | $ 151,800 |
Noncontrolling interest, percentage of voting interests acquired | 15.00% |  |  |  |  |  |
Payments to non-controlling interests, including acquisition of interests and distributions | $ 6,800 |  |  | 8,965 | $ 719 |  |
Subcontracting Arrangements | Management | Line of Credit |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Line of credit facility, letters of credit issued |  | 15,000 |  | 15,000 |  |  |
Subcontracting Arrangements | Management | 2020 Acquisitions |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Receivables, net, related party |  | 200 |  | 200 |  | 400 |
Charges, related party |  | 200 | $ 600 | 600 | $ 600 |  |
Community Condotte DeMoya JV, LLC |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Equity method investments, ownership percentage |  |  |  |  |  |  | 25.00%
Negative equity method investment |  | 1,600 |  | 1,600 |  | 2,000 |
Community Condotte DeMoya JV, LLC | Subcontracting Arrangements | Management |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |
Receivables, net, related party |  | $ 2,300 |  | $ 2,300 |  | $ 1,900 |

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