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Business Segments (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Oct. 31, 2012 | Oct. 31, 2011 | Oct. 31, 2012 | Oct. 31, 2011
Segment Reporting Information [Line Items] |  |  |  |
Fee revenue | $ 196,231 | $ 200,136 | $ 382,925 | $ 406,467
Segment income (loss) | 18,264 | 25,407 | 35,273 | 51,349
Restructuring charges, net | 15,495 |  | 15,495 |
Operating income (loss) | 2,769 | 25,407 | 19,778 | 51,349
North America |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Fee revenue | 69,441 | 77,525 | 141,547 | 157,449
Segment income (loss) | 14,453 | 21,291 | 32,527 | 42,816
Restructuring charges, net | 5,436 |  | 5,436 |
Operating income (loss) | 9,017 |  | 27,091 |
EMEA |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Fee revenue | 33,142 | 35,408 | 62,965 | 74,239
Segment income (loss) | 3,823 | 5,028 | 5,611 | 10,032
Restructuring charges, net | 4,752 |  | 4,752 |
Operating income (loss) | (929) |  | 859 |
Asia Pacific |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Fee revenue | 18,338 | 21,827 | 35,721 | 44,323
Segment income (loss) | 1,693 | 3,590 | 2,191 | 7,461
Restructuring charges, net | 613 |  | 613 |
Operating income (loss) | 1,080 |  | 1,578 |
South America |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Fee revenue | 6,827 | 7,707 | 14,961 | 15,948
Segment income (loss) | 1,217 | 2,215 | 3,306 | 4,885
Operating income (loss) | 1,217 |  | 3,306 |
Subtotal |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Fee revenue | 127,748 | 142,467 | 255,194 | 291,959
Segment income (loss) | 21,186 | 32,124 | 43,635 | 65,194
Restructuring charges, net | 10,801 |  | 10,801 |
Operating income (loss) | 10,385 |  | 32,834 |
Leadership and Talent Consulting Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Fee revenue | 38,452 | 29,085 | 66,844 | 55,726
Segment income (loss) | 6,929 | 4,227 | 11,191 | 6,194
Restructuring charges, net | 677 |  | 677 |
Operating income (loss) | 6,252 |  | 10,514 |
Futurestep |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Fee revenue | 30,031 | 28,584 | 60,887 | 58,782
Segment income (loss) | 3,323 | 2,815 | 6,505 | 5,671
Restructuring charges, net | 3,086 |  | 3,086 |
Operating income (loss) | 237 |  | 3,419 |
Corporate |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Segment income (loss) | (13,174) | (13,759) | (26,058) | (25,710)
Restructuring charges, net | 931 |  | 931 |
Operating income (loss) | $ (14,105) |  | $ (26,989) |

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