Real Estate - Schedule of Construction in Progress (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Real Estate [Line Items]
Development in process	$ 205,911	$ 69,477
Twinbrook Quarter
Real Estate [Line Items]
Development in process	138,069	0
Hampden House
Real Estate [Line Items]
Development in process	56,898	50,723
The Waycroft
Real Estate [Line Items]
Development in process	0	8,651
Other
Real Estate [Line Items]
Development in process	$ 10,944	$ 10,103