Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Property and equipment - net of depreciation	$ 149,918	$ 146,542
Common stock, par value per share	$ 0.50	$ 0.50
Common stock, authorized shares	30,000,000	30,000,000
Common stock, issued shares	20,585,793	20,085,865
Common stock, outstanding shares	20,585,793	20,085,865
Centennial Founders, LLC
Property and equipment - net of depreciation	$ 75,394	$ 74,726