CONSOLIDATED CONDENSED BALANCE SHEETS (UNAUDITED) (Parenthetical) (USD $) In Thousands, except Share data	Sep. 30, 2011	Dec. 31, 2010
ASSETS
Property and Equipment, Accumulated Depreciation	$ 95,164	$ 79,942
Stockholders' Equity
Common Stock, par value (in dollars per share)	$ 1	$ 1
Common Stock , shares authorized (in shares)	75,000,000	75,000,000
Common Stock , shares issued (in shares)	47,315,050	47,089,593
Common Stock , shares outstanding (in shares)	47,315,050	47,089,593