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Segments and Other Geographic Information (Details) - USD ($) $ in Thousands	3 Months Ended																12 Months Ended
	Jul. 31, 2015	[1]	Apr. 30, 2015	[1]	Jan. 31, 2015	[1]	Oct. 31, 2014	[1]	Jul. 31, 2014	[1]	Apr. 30, 2014	[1]	Jan. 31, 2014	[1]	Oct. 31, 2013	[1]	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2013
Segment Reporting Information, Profit (Loss) [Abstract]
Revenues	$ 282,293		$ 297,142		$ 276,258		$ 290,386		$ 287,450		$ 309,722		$ 286,434		$ 279,883		$ 1,146,079	$ 1,163,489	$ 1,046,386
Other
Segment Reporting Information, Profit (Loss) [Abstract]
Revenues																	21,813	24,244	11,170
International
Segment Reporting Information, Profit (Loss) [Abstract]
Revenues																	243,199	269,915	228,945
Operating segments | North America
Segment Reporting Information, Profit (Loss) [Abstract]
Revenues																	914,443	904,000	826,030
Operating segments | United Kingdom
Segment Reporting Information, Profit (Loss) [Abstract]
Revenues																	$ 209,823	$ 235,245	$ 209,186
[1] Earnings per share were computed independently for each of the periods presented; therefore, the sum of the earnings per share amounts for the quarters may not equal the total for the year.

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- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 225



-SubTopic 10



-Section S99



-Paragraph 2



-Subparagraph (SX 210.5-03.1)



-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher SEC



-Name Regulation S-X (SX)



-Number 210



-Section 03



-Paragraph 1



-Article 5

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