Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Property and equipment - net of depreciation	$ 146,542	$ 146,590
Common stock, par value per share	$ 0.50	$ 0.50
Common stock, authorized shares	30,000,000	30,000,000
Common stock, issued shares	20,563,023	20,085,865
Common stock, outstanding shares	20,563,023	20,085,865
Centennial Founders, LLC
Property and equipment - net of depreciation	$ 74,726	$ 72,115