CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2018	Apr. 30, 2017
Income Statement [Abstract]
Net sales	$ 813,474	$ 802,038	$ 1,585,422	$ 1,490,384
Cost and expenses:
Cost of sales	703,410	655,283	1,405,511	1,261,674
Selling, general and administrative	55,037	43,641	107,612	89,711
Cost and expenses	758,447	698,924	1,513,123	1,351,385
Operating Income	55,027	103,114	72,299	138,999
Other income (expense):
Interest income	905	301	1,324	496
Interest expense	(506)	(428)	(1,029)	(860)
Other	4	3	6	5
Other income (expense)	403	(124)	301	(359)
Income before income taxes	55,430	102,990	72,600	138,640
Income tax expense (benefit)	13,482	35,975	(20,554)	47,600
Net income	$ 41,948	$ 67,015	$ 93,154	$ 91,040
Earnings per share:
Basic (in usd per share)	$ 1.84	$ 2.95	$ 4.08	$ 4.00
Diluted (in usd per share)	1.84	2.95	4.08	4.00
Dividends per share (in usd per share)	$ 0.32	$ 0.24	$ 0.64	$ 0.48