Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data	Jun. 30, 2011	Dec. 31, 2010
Consolidated Condensed Balance Sheet
Accounts receivable, allowance for doubtful accounts	$ 34,586	$ 20,357
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	120,000,000	120,000,000
Common stock, shares issued	72,732,559	70,752,670
Treasury stock, shares	246,037	246,037