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General and Administrative Expenses (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
General and Administrative Expense [Abstract]      
Management fees – related parties $ 19,221 $ 18,884 $ 18,050
Professional fees (legal and accounting) 854 832 720
Directors fees and expenses 759 644 468
Listing fees and expenses 101 93 97
Miscellaneous 1,563 1,049 1,304
Total $ 22,498 $ 21,502 $ 20,639