Quarterly financial data (unaudited) (Tables)

12 Months Ended

Oct. 31, 2011

Quarterly financial data (Tables) [Abstract]

Quarterly financial data

	First		Second		Third		Fourth
2011:
Sales	$	270,962	$	318,924	$	312,255	$	331,018
Gross margin		166,171		197,752		188,050		196,459
Net income		45,897		65,242		56,550		54,675
Earnings per share:
Basic		0.67		0.96		0.83		0.82
Diluted		0.67		0.95		0.82		0.81
2010:
Sales	$	220,589	$	251,659	$	279,121	$	290,182
Gross margin		131,675		153,867		165,801		170,271
Net income		26,732		32,431		55,329		53,556
Earnings per share:
Basic		0.40		0.48		0.81		0.79
Diluted		0.39		0.47		0.80		0.78