CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2019	Apr. 30, 2018
Income Statement [Abstract]
Net sales	$ 845,229	$ 813,474	$ 1,588,617	$ 1,585,422
Cost and expenses:
Cost of sales	740,833	703,410	1,449,233	1,405,511
Selling, general and administrative	49,230	55,037	107,765	107,612
Cost and expenses	790,063	758,447	1,556,998	1,513,123
Operating income	55,166	55,027	31,619	72,299
Other income (expense):
Interest income	0	905	0	1,324
Interest expense	(1,173)	(506)	(1,682)	(1,029)
Other	2	4	2	6
Other income (expense)	(1,171)	403	(1,680)	301
Income before income taxes	53,995	55,430	29,939	72,600
Income tax expense (benefit)	13,359	13,482	7,136	(20,554)
Net income	$ 40,636	$ 41,948	$ 22,803	$ 93,154
Earnings per share:
Basic (in usd per share)	$ 1.83	$ 1.84	$ 1.03	$ 4.08
Diluted (in usd per share)	1.83	1.84	1.03	4.08
Dividends per share (in usd per share)	$ 0.32	$ 0.32	$ 0.64	$ 0.64