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Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Common stock, par value $ 0.50 $ 0.50
Common stock, Authorized shares 30,000,000 30,000,000
Common stock, Issued shares 20,071,346 19,975,706
Common stock, outstanding shares 20,071,346 19,975,706
Property and equipment, attributable to Centennial Founders LLC $ 135,965 $ 128,430
Centennial
   
Property and equipment, attributable to Centennial Founders LLC $ 69,686