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Equity - Non-controlling Interests (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Variable Interest Entity [Line Items]      
Income attributable to non-controlling interests $ 6,363 $ 4,771 $ 2,661
Non-controlling interests 4,791 3,539  
Distributions to non-controlling interests 5,404 2,526 $ 4,038
VIE      
Variable Interest Entity [Line Items]      
Net Assets 13,200 12,000  
Non-controlling interests $ 4,800 $ 3,500