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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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

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-Publisher FASB

-Name Accounting Standards Codification

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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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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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Stockholders' Equity - Additional Information (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Apr. 30, 2015	Jan. 31, 2015	Oct. 31, 2014	Apr. 30, 2014	Apr. 30, 2015	Apr. 30, 2014
Stock Based Compensation And Stockholders Equity [Line Items]
Stock-based compensation	$ 1,720us-gaap_ShareBasedCompensation			$ 1,295us-gaap_ShareBasedCompensation	$ 5,047us-gaap_ShareBasedCompensation	$ 3,943us-gaap_ShareBasedCompensation
Withholding taxes payable					1,562	1,251
Dividends declared and paid					43,237us-gaap_DividendsCommonStockCash
Regular Dividend
Stock Based Compensation And Stockholders Equity [Line Items]
Dividends declared and paid per common share	$ 0.27	$ 0.27	$ 0.27	$ 0.23	$ 0.81	$ 0.69
Dividends declared and paid					43,237
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