Income Taxes (Details Textual)	3 Months Ended			9 Months Ended		12 Months Ended
	Jul. 31, 2018 USD ($)	Jan. 31, 2018 USD ($)	Jul. 31, 2017 USD ($)	Jul. 31, 2018 USD ($)	Jul. 31, 2017 USD ($)	Oct. 31, 2019	Oct. 31, 2017
Income Taxes (Textual) [Abstract]
Income tax provision	$ 59,839,000		$ 55,011,000	$ 100,268,000	$ 168,947,000
Effective Income Tax Rate Reconciliation, Percent	23.60%		27.00%	18.70%	33.00%
Number of states	21			21
Unrecognized Tax Benefits	$ 17,600,000			$ 17,600,000
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range Not Possible				During the next 12 months, it is reasonably possible that our unrecognized tax benefits will change, but we are not able to provide a range of such change.
Corporate Taxes per the Tax Cuts and Jobs Acts (TCJA) [Abstract]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount	$ (5,000,000.00)	$ (31,200,000.00)		$ (36,200,000.00)
Subsequent Event [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	23.30%			23.30%			35.00%
Subsequent Event [Member]
Subsequent Event [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent						21.00%
State and Local Jurisdiction [Member]
Income Taxes (Textual) [Abstract]
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent				7.20%	6.50%