Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Property and equipment - net of depreciation	$ 274,791	$ 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	20,595,980	20,563,023
Common stock, outstanding shares	20,595,980	20,563,023
Centennial Founders, LLC
Property and equipment - net of depreciation	$ 76,358	$ 74,726