Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Consolidated Balance Sheets [Abstract]
Allowance for Doubtful Accounts Receivable	$ 11,460	$ 29,798
Common Stock, Par Value	$ 0.01	$ 0.01
Common Stock, Shares Authorized	200,000	200,000
Common Stock, Shares Issued	139,798	116,336
Common Stock, Shares Outstanding	137,899	114,784
Treasury Stock, Shares	1,899	1,552