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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Common stock, par value per share $ 0.50 $ 0.50
Common stock, authorized shares 30,000,000 30,000,000
Common stock, issued shares 20,669,348 20,636,478
Common stock, outstanding shares 20,669,348 20,636,478
Real estate developments $ 227,125 $ 219,654
Centennial Founders, LLC    
Real estate developments $ 79,963 $ 77,131