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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Real estate development $ 287,444 $ 283,385
Common stock, par value per share (in dollars per share) $ 0.50 $ 0.50
Common stock, authorized shares (in shares) 30,000,000 30,000,000
Common stock, issued shares (in shares) 26,020,953 25,972,080
Common stock, outstanding shares (in shares) 26,020,953 25,972,080
Centennial    
Real estate development $ 101,331 $ 100,311