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Fair Value Measurements - Non-Recurring Measurements (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Impairment Loss      
Investment properties, total impairment loss $ 0 $ 9,002 $ 2,359
Fair Value, Measurements, Nonrecurring      
Impairment Loss      
Investment properties, total impairment loss 0 9,002 2,359
Fair Value, Measurements, Nonrecurring | Level 3      
Fair Value      
Investment properties $ 0 $ 5,500 $ 42,250