CONSOLIDATED CONDENSED BALANCE SHEETS (UNAUDITED) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
ASSETS
Accumulated Depreciation, Property and Equipment	$ 125,971	$ 104,541
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)	47,556,056	47,329,275
Common Stock, shares outstanding (in shares)	47,556,056	47,329,275