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Investment, Real Estate and Other Assets - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 | Sep. 09, 2020
Westside Boulder, LLC. [Member] | Boulder Road LLC [Member] |  |
Schedule of Cost-method Investments [Line Items] |  |
Undivided interest sold percentage |  | 50.00%
Colorado Corporation [Member] |  |
Schedule of Cost-method Investments [Line Items] |  |
Cost method investment, ownership percentage | 10.00% |
Purchase of investments | $ 10.0 |

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- Details
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