CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016
Income Statement [Abstract]
Net sales	$ 802,038	$ 692,089	$ 1,490,384	$ 1,297,255
Cost and expenses:
Cost of sales	655,283	578,276	1,261,674	1,133,337
Selling, general and administrative	43,641	40,039	89,711	70,333
Cost and expenses	698,924	618,315	1,351,385	1,203,670
Operating Income	103,114	73,774	138,999	93,585
Other income (expense):
Interest income	301	0	496	0
Interest expense	(428)	(420)	(860)	(851)
Other	3	7	5	10
Other income (expense)	(124)	(413)	(359)	(841)
Income before income taxes	102,990	73,361	138,640	92,744
Income tax expense	36,047	25,759	48,524	34,461
Net income	$ 66,943	$ 47,602	$ 90,116	$ 58,283
Earnings per share:
Basic (in usd per share)	$ 2.94	$ 2.11	$ 3.96	$ 2.58
Diluted (in usd per share)	2.94	2.11	3.96	2.58
Dividends per share (in usd per share)	$ 0.24	$ 0.22	$ 0.48	$ 0.44