Income Taxes (Tables)

9 Months Ended

Jul. 31, 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):

	July 31,			October 31,
	2018			2017
Deferred tax assets:
Reserves and accrued liabilities	$	35,022		$	56,597
Depreciation and amortization	317,526			451,385
NOL and credit carry forward	496,327			803,622
Other	20,077			29,398
Gross deferred tax assets	868,952			1,341,002
Valuation allowance	(144,865		)	(185,898		)
Deferred tax asset, net of valuation allowance	$	724,087		$	1,155,104