CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 30, 2015	Apr. 30, 2014	Apr. 30, 2015	Apr. 30, 2014
Income Statement [Abstract]
Net sales	$ 716,592	$ 660,717	$ 1,383,955	$ 1,245,600
Cost and expenses:
Cost of sales	577,567	552,311	1,103,768	1,068,396
Selling, general and administrative	29,503	29,915	67,608	53,514
Cost and Expenses, Total	607,070	582,226	1,171,376	1,121,910
Operating Income	109,522	78,491	212,579	123,690
Other income (expense):
Interest income	13	10	39	22
Interest expense	(686)	(741)	(1,113)	(1,652)
Other	29	32	63	48
Nonoperating Income (Expense), Total	(644)	(699)	(1,011)	(1,582)
Income before income taxes	108,878	77,792	211,568	122,108
Income tax expense	37,632	26,804	73,819	42,249
Net income	$ 71,246	$ 50,988	$ 137,749	$ 79,859
Earnings per share:
Basic (in usd per share)	$ 3.13	$ 2.21	$ 6.00	$ 3.46
Diluted (in usd per share)	$ 3.13	$ 2.21	$ 6.00	$ 3.46
Dividends per share (in usd per share)	$ 0.22	$ 0.20	$ 0.44	$ 0.40