CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Accounts receivable, allowance for doubtful accounts	$ 18,159	$ 25,250
Common Stock, par value	$ 0.01	$ 0.01
Common Stock, shares authorized	120,000,000	120,000,000
Common Stock, shares issued	76,107,506	76,047,506
Common Stock, shares outstanding	76,107,506	76,047,506
Preferred Stock, par value	$ 0.01	$ 0.01
Preferred Stock, shares authorized	1,000,000	1,000,000
Preferred Stock, shares issued
Preferred Stock, shares outstanding
Treasury Stock at cost, shares	246,037	246,037