Condensed Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 30, 2012	Apr. 30, 2011	Apr. 30, 2012	Apr. 30, 2011
Revenues	$ 162,831	$ 137,046	$ 295,202	$ 245,836
Cost of sales	146,374	125,450	269,083	227,895
Gross profit	16,457	11,596	26,119	17,941
Selling, general and administrative expenses	7,209	5,953	13,857	11,039
Asset recovery	(558)	(134)	(623)	(142)
Operating income	9,806	5,777	12,885	7,044
Interest expense	525	456	811	963
Other income (expense), net	(25)	112	22	111
Income before income taxes	9,256	5,433	12,096	6,192
Provision for income taxes	3,351	1,984	4,612	2,237
Net income	$ 5,905	$ 3,449	$ 7,484	$ 3,955
Earnings per share:
Basic earnings per share	$ 0.35	$ 0.21	$ 0.45	$ 0.24
Basic weighted average number of common shares	16,844	16,729	16,804	16,678
Diluted earnings per share	$ 0.35	$ 0.20	$ 0.44	$ 0.23
Diluted weighted average number of common shares	16,903	16,868	16,883	16,849