Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data	Jun. 30, 2011	Dec. 31, 2010
Condensed Consolidated Balance Sheets
Accounts receivable, allowances	$ 6,900	$ 10,500
Preferred stock, par value	$ 1	$ 1
Preferred stock, authorized	5,000,000	5,000,000
Preferred stock, issued	0	0
Common stock, par value	$ 0.25	$ 0.25
Common stock, authorized	600,000,000	600,000,000
Common stock, issued	86,646,307	84,973,586
Common stock, outstanding	86,646,307	84,973,586