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Business Segments (Financial Highlights By Business Segment) (Details) (USD $) In Thousands	3 Months Ended
	Jul. 31, 2011	Jul. 31, 2010
Fee revenue	$ 206,331	$ 175,112
Total revenue	214,590	183,162
Operating income (loss)	25,942	19,272
North America [Member]
Fee revenue	98,425	89,975
Total revenue	103,186	95,065
Operating income (loss)	24,026	19,675
EMEA [Member]
Fee revenue	43,242	36,268
Total revenue	44,526	37,138
Operating income (loss)	5,344	3,053
Asia Pacific [Member]
Fee revenue	25,675	21,142
Total revenue	26,211	21,603
Operating income (loss)	3,934	3,069
South America [Member]
Fee revenue	8,791	7,486
Total revenue	8,997	7,618
Operating income (loss)	2,283	1,879
Subtotal [Member]
Fee revenue	176,133	154,871
Total revenue	182,920	161,424
Operating income (loss)	35,587	27,676
Futurestep [Member]
Fee revenue	30,198	20,241
Total revenue	31,670	21,738
Operating income (loss)	2,306	989
Corporate [Member]
Operating income (loss)	$ (11,951)	$ (9,393)

X

- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ Details

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Namespace Prefix:	us-gaap
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Balance Type:	credit
Period Type:	duration

X

- Definition

Aggregate revenue during the period for services rendered in the normal course of business (before deducting allowances and discounts) which are not otherwise defined in the taxonomy.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 5
-Section 03
-Paragraph 1

Reference 2: 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(d))
-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

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X

- Definition

Aggregate revenue during the period from services rendered in the normal course of business, after deducting allowances and discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 5
-Section 03
-Paragraph 1

Reference 2: 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(d))
-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

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