Recently Issued Accounting Standards - Financial Statement Line Items Affected by the Adoption of New Standard (Detail) - USD ($) $ in Thousands	Jan. 31, 2017	Oct. 31, 2016
Assets:
Other assets	$ 26,319	$ 23,759
Liabilities:
Long-term debt	$ 912,403	942,771
Adjustments for New Accounting Pronouncement
Assets:
Other assets		23,759
Liabilities:
Long-term debt		942,771
Adjustments for New Accounting Pronouncement | As Originally Reported [Member]
Assets:
Other assets		25,541
Liabilities:
Long-term debt		944,553
Adjustments for New Accounting Pronouncement | Effect of Change [Member]
Assets:
Other assets		1,782
Liabilities:
Long-term debt		$ 1,782