Condensed Consolidated Statements of Financial Position (Parenthetical) (USD $) In Thousands, except Share data	Jun. 30, 2011	Dec. 31, 2010
Condensed Consolidated Statements of Financial Position
Accounts receivable, allowances	$ 20,761	$ 21,569
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, authorized	5,000,000	5,000,000
Preferred stock, issued	0	0
Preferred stock, outstanding	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, authorized	260,000,000	260,000,000
Common stock, issued	144,880,976	146,182,564
Common stock, outstanding	144,880,976	146,182,564