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Investments in Unconsolidated Subsidiaries - Equity Method Investments (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Mar. 31, 2022 | Dec. 31, 2021
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Schedule of Equity Method Investments [Line Items] |  |  |
Total investment in unconsolidated subsidiaries | $ 1,317,705 |  | $ 1,196,088
Real Estate Investments |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Total investment in unconsolidated subsidiaries | 622,826 |  | 453,813
Altus Power |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Total investment in unconsolidated subsidiaries | 219,624 |  | 368,368
Class A common stock |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Total investment in unconsolidated subsidiaries | $ 160,093 |  | 229,900
Common stock shares (in shares) | 24,550,000 |  |
Shares converted to Class A common stock (in shares) |  | 2,011 |
Alignment shares |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Total investment in unconsolidated subsidiaries | $ 59,530 |  | 114,727
Alignment shares converted (in shares) |  | 201,250 |
Private placement warrants |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Total investment in unconsolidated subsidiaries | 0 |  | 23,741
Other |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Total investment in unconsolidated subsidiaries | $ 475,256 |  | $ 373,907
Private Placement Warrants |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Warrants, exercised (in shares) |  | 2,552,390 |
Conversion rate |  | 27.63% |

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