Difference Between U.S. Statutory Tax Rate and Effective Income Tax Rate (Detail)	12 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2011
Reconciliation of Statutory Federal Tax Rate [Line Items]
Statutory rate	35.00%	35.00%	35.00%
State and local income taxes, net of federal tax benefit	6.50%	6.50%	6.30%
Federal and state tax credits	(8.60%)	(5.50%)	(5.10%)
Impact of change in state tax rate	0.50%	1.20%	(0.40%)
Tax liabilities no longer required	(1.40%)	(7.20%)	(4.00%)
Nondeductible expenses and other, net	3.20%	2.30%	3.20%
Annual tax rate	35.20%	32.30%	35.00%