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Significant Accounting Policies - Summary of Real Estate Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Accounting Policies [Abstract]    
Real estate under development, current (included in other current assets) $ 55,072 $ 14,757
Real estate and other assets held for sale (included in other current assets) 3,710 5,066
Real estate under development 277,630 185,508
Real estate held for investment (included in other assets, net) 3,795 8,101
Total real estate $ 340,207 $ 213,432