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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Common stock, par value per share $ 0.50 $ 0.50
Common stock, authorized shares 30,000,000 30,000,000
Common stock, issued shares 20,716,380 20,688,154
Common stock, outstanding shares 20,716,380 20,688,154
Real estate developments $ 234,235 $ 235,466
Centennial Founders, LLC    
Real estate developments $ 85,181 $ 84,194