CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Accounts receivable, allowance	$ 7,296	$ 5,971
Accounts payable, contractor payables	$ 32,275	$ 18,110
Preferred Stock
Preferred Stock, par value	$ 0.0001	$ 0.0001
Preferred Stock, shares authorized	100,000,000	100,000,000
Preferred Stock, issued
Preferred Stock, outstanding
Series A Preferred Convertible Stock
Preferred Stock, par value	$ 0.0001	$ 0.0001
Preferred Stock, shares authorized	1	1
Preferred Stock, issued
Preferred Stock, outstanding
Voting Common Stock
Common Stock, par value	$ 0.0001	$ 0.0001
Common Stock, shares authorized	865,000,000	865,000,000
Common Stock, shares issued	297,175,777	290,682,693
Common Stock, shares outstanding	297,175,777	290,682,693
Nonvoting Common Stock
Common Stock, par value	$ 0.0001	$ 0.0001
Common Stock, shares authorized	135,000,000	135,000,000
Common Stock, shares issued	55,881,512	19,275,750
Common Stock, shares outstanding	55,881,512	19,275,750