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Business Segments (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jan. 31, 2013 | Jan. 31, 2012 | Jan. 31, 2013 | Jan. 31, 2012
Segment Reporting Information [Line Items] |  |  |  |
Fee revenue | $ 202,004 | $ 185,951 | $ 584,929 | $ 592,418
Segment income (loss) | 13,147 | 17,094 | 48,420 | 68,443
Restructuring charges, net | 4,441 | 929 | 19,936 | 929
Operating income (loss) | 8,706 | 16,165 | 28,484 | 67,514
North America |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Fee revenue | 71,259 | 72,000 | 212,806 | 229,449
Segment income (loss) | 14,637 | 15,601 | 47,164 | 58,417
Restructuring charges, net |  | (15) | 5,436 | (15)
Operating income (loss) | 14,637 | 15,616 | 41,728 | 58,432
EMEA |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Fee revenue | 33,600 | 34,442 | 96,565 | 108,681
Segment income (loss) | 4,177 | 4,419 | 9,788 | 14,451
Restructuring charges, net |  | 897 | 4,752 | 897
Operating income (loss) | 4,177 | 3,522 | 5,036 | 13,554
Asia Pacific |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Fee revenue | 18,301 | 18,383 | 54,022 | 62,706
Segment income (loss) | 1,913 | 1,397 | 4,104 | 8,858
Restructuring charges, net |  |  | 613 |
Operating income (loss) | 1,913 | 1,397 | 3,491 | 8,858
South America |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Fee revenue | 7,334 | 7,256 | 22,295 | 23,204
Segment income (loss) | 920 | 1,687 | 4,226 | 6,572
Restructuring charges, net |  | (99) |  | (99)
Operating income (loss) | 920 | 1,786 | 4,226 | 6,671
Subtotal |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Fee revenue | 130,494 | 132,081 | 385,688 | 424,040
Segment income (loss) | 21,647 | 23,104 | 65,282 | 88,298
Restructuring charges, net |  | 783 | 10,801 | 783
Operating income (loss) | 21,647 | 22,321 | 54,481 | 87,515
Leadership & Talent Consulting |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Fee revenue | 41,155 | 28,031 | 107,999 | 83,757
Segment income (loss) | 1,643 | 5,195 | 12,834 | 11,389
Restructuring charges, net | 4,441 |  | 5,118 |
Operating income (loss) | (2,798) | 5,195 | 7,716 | 11,389
Futurestep |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Fee revenue | 30,355 | 25,839 | 91,242 | 84,621
Segment income (loss) | 3,722 | 1,587 | 10,227 | 7,258
Restructuring charges, net |  | 146 | 3,086 | 146
Operating income (loss) | 3,722 | 1,441 | 7,141 | 7,112
Corporate |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Segment income (loss) | (13,865) | (12,792) | (39,923) | (38,502)
Restructuring charges, net |  |  | 931 |
Operating income (loss) | $ (13,865) | $ (12,792) | $ (40,854) | $ (38,502)

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