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Aggregate dividends paid during the period for each share of common stock outstanding.

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Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

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Amount of cash outflow to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award.

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Stockholders' Equity - Additional Information (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended		3 Months Ended
	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2015	Jan. 31, 2014	Oct. 31, 2014
Stock Based Compensation And Stockholders Equity [Line Items]
Stock-based compensation	$ 1,762us-gaap_ShareBasedCompensation	$ 1,272us-gaap_ShareBasedCompensation	$ 3,327us-gaap_ShareBasedCompensation	$ 2,648us-gaap_ShareBasedCompensation
Withholding taxes payable			1,562	1,251
Dividends declared and paid			28,824us-gaap_DividendsCommonStockCash
Regular Dividend
Stock Based Compensation And Stockholders Equity [Line Items]
Dividends declared and paid per common share	$ 0.27				$ 0.27
Dividends declared and paid			28,824
Discontinued Operations
Stock Based Compensation And Stockholders Equity [Line Items]
Total compensation expenses			0	480
Restricted Stock
Stock Based Compensation And Stockholders Equity [Line Items]
Withholding taxes payable			$ 1,562	$ 1,251