Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data	Jul. 31, 2011	Oct. 31, 2010
Current assets:
Allowances for trade accounts receivable	$ 54,381	$ 48,043
Fixed assets accumulated depreciation and amortization	$ 276,192	$ 253,931
Equity:
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	285,000,000	285,000,000
Common stock, shares issued	168,047,077	166,867,127
Treasury stock, shares	2,885,200	2,885,200