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DIVIDEND REINVESTMENT AND COMMON STOCK REPURCHASE PLAN (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Class of Stock [Line Items]      
Issuance of common stock for dividend reinvestment plan (in shares) 47,157 42,438 42,872
Stock issued during period under dividend reinvestment plan, average price per share (in dollars per share) $ 30.21 $ 34.04  
Purchase of common stock 1,035,901 66,467 1,459,148
Repurchase of common stock, cost $ 30,989 $ 2,181 $ 47,193