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RELATED PARTY TRANSACTIONS - Other (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Real estate expenses      
Related Party Transactions      
Insurance expense recognized of amounts reimbursed to related party $ 1,267,000 $ 1,091,000 $ 927,000
Chairman | General and administrative expense      
Related Party Transactions      
Aggregate fees paid 298,000 298,000 289,000
Vice Chairman | General and administrative expense      
Related Party Transactions      
Aggregate fees paid $ 119,000 $ 119,000 116,000
Gould Investors L.P.      
Related Party Transactions      
Number of common stock shares owned by the related party 1,921,712 1,894,883  
Ownership percentage held by a related party 9.20% 9.20%  
Amount of insurance reimbursed $ 1,402,000 $ 1,168,000 $ 1,025,000