Basis of Presentation Statement of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of sales	$ 239,815	$ 257,983	$ 463,953	$ 493,149
Gross profit	33,216	26,281	57,016	42,170
Selling, general and administrative expenses	21,695	16,992	41,883	34,336
Asset impairment, net	0	0	41	273
Operating income	10,957	8,724	13,963	6,432
Other Nonoperating Income (Expense)	(205)	365	(495)	(31)
Income before income taxes	6,552	4,573	4,458	(2,465)
Provision (benefit) for income taxes	2,323	364	2,247	(1,547)
Net loss	$ 4,229	$ 4,209	$ 2,211	$ (918)
Basic income (loss) per share	$ 0.24	$ 0.24	$ 0.12	$ (0.05)
Diluted income (loss) per share	$ 0.24	$ 0.24	$ 0.12	$ (0.05)
Timing And Recognition Of Certain Transactions [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of sales		$ 257,983
Gross profit		26,281
Operating income		8,724
Other Nonoperating Income (Expense)		(365)
Income before income taxes		4,573
Provision (benefit) for income taxes		364
Net loss		$ 4,209		$ (918)
Basic income (loss) per share		$ 0.24
Diluted income (loss) per share		$ 0.24
Timing And Recognition Of Certain Transactions [Member] | Scenario, Previously Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of sales		$ 259,039		494,113
Gross profit		25,225		41,206
Selling, general and administrative expenses				34,576
Asset impairment, net				0
Operating income		7,668		5,501
Other Nonoperating Income (Expense)		83		479
Income before income taxes		3,069		(3,844)
Provision (benefit) for income taxes		12		(1,842)
Net loss		$ 3,057		$ (2,002)
Basic income (loss) per share		$ 0.17		$ (0.11)
Diluted income (loss) per share		$ 0.17		$ (0.11)
Timing And Recognition Of Certain Transactions [Member] | Restatement Adjustment [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cost of sales		$ (1,056)		$ (964)
Gross profit		1,056		964
Selling, general and administrative expenses				(240)
Asset impairment, net				273
Operating income		1,056		931
Other Nonoperating Income (Expense)		(448)		(448)
Income before income taxes		1,504		1,379
Provision (benefit) for income taxes		352		295
Net loss		$ 1,152		$ 1,084
Basic income (loss) per share		$ 0.07		$ 0.06
Diluted income (loss) per share		$ 0.07		$ 0.06