Condensed Consolidated Balance Sheets Parentheticals (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Allowance for uncollectible accounts	$ 476	$ 601
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	100,000,000	100,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	364,492,637	362,460,395
Common stock, shares outstanding	364,492,637	362,460,395
Treasury stock, shares	1,057,237	602,881