Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2016	Jan. 31, 2015
Income Tax Disclosure [Abstract]
Effective income tax rate reconciliation, percent	(2.30%)	(8.30%)
Tax Credit	$ 5.0	$ 3.6
Tax credit state employment based		$ 1.8