Income Taxes (Tables)

6 Months Ended

Apr. 30, 2018

Income Tax Disclosure [Abstract]

Schedule of Significant Components of Deferred Tax Assets and Liabilities

The significant components of DTA are as follows (in thousands):

	April 30,			October 31,
	2018			2017
Deferred tax assets:
Reserves and accrued liabilities	$	36,115		$	56,597
Depreciation and amortization	288,145			451,385
NOL and credit carry forward	538,869			803,622
Other	18,706			29,398
Gross deferred tax assets	881,835			1,341,002
Valuation allowance	(147,011		)	(185,898		)
Deferred tax asset, net of valuation allowance	$	734,824		$	1,155,104