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Business Segments (Detail) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Dec. 31, 2015 | Jan. 31, 2016 | Jan. 31, 2015 | Jan. 31, 2016 | Jan. 31, 2015
Segment Reporting Information [Line Items] |  |  |  |  |
Fee revenue |  | $ 344,158 | $ 249,545 | $ 892,152 | $ 756,435
Total revenue |  | 358,879 | 258,871 | 929,553 | 783,913
Net (loss) income |  | (15,995) | 22,939 | 25,058 | 62,875
Other loss (income), net |  | 7,092 | 1,478 | 9,812 | (3,061)
Interest (income) expense, net |  | 372 | (288) | 1,215 | 1,426
Equity in earnings of unconsolidated subsidiaries, net |  | (181) | (778) | (1,446) | (1,696)
Income tax (benefit) provision | $ (2,100) | (5,355) | 9,576 | 13,211 | 26,392
Operating income (loss) |  | (14,067) | 32,927 | 47,850 | 85,936
Depreciation and amortization |  | 10,330 | 6,814 | 24,933 | 20,363
Other (loss) income, net |  | (7,092) | (1,478) | (9,812) | 3,061
Equity in earnings of unconsolidated subsidiaries, net |  | 181 | 778 | 1,446 | 1,696
EBITDA |  | (10,648) | 39,041 | 64,417 | 111,056
Restructuring charges, net |  | 30,577 | (418) | 30,577 | 9,468
Integration/acquisition costs |  | 21,147 |  | 33,815 |
Acquisition costs |  |  | 445 |  | 445
Deferred revenue adjustment due to acquisition |  | 5,871 |  | 5,871 |
Separation costs |  | 744 |  | 744 |
Adjusted EBITDA |  | 47,691 | 39,068 | 135,424 | 120,969
Operating Segments | Executive Recruitment |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Fee revenue |  | 154,653 | 143,479 | 463,215 | 440,824
Total revenue |  | 159,662 | 148,987 | 479,096 | 457,581
Operating income (loss) |  | 34,605 | 33,583 | 108,748 | 87,680
Depreciation and amortization |  | 1,333 | 1,593 | 4,209 | 5,048
Other (loss) income, net |  | (358) | (135) | (19) | 537
Equity in earnings of unconsolidated subsidiaries, net |  | 26 | 103 | 252 | 281
EBITDA |  | 35,606 | 35,144 | 113,190 | 93,546
Restructuring charges, net |  | 7,255 | (148) | 7,255 | 5,384
Adjusted EBITDA |  | 42,861 | 34,996 | 120,445 | 98,930
Operating Segments | Executive Recruitment | North America |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Fee revenue |  | 93,520 | 78,026 | 276,667 | 243,055
Total revenue |  | 97,097 | 81,521 | 287,694 | 253,855
Operating income (loss) |  | 28,957 | 22,673 | 80,524 | 60,788
Depreciation and amortization |  | 812 | 867 | 2,471 | 2,662
Other (loss) income, net |  | (330) | (225) | (425) | 98
Equity in earnings of unconsolidated subsidiaries, net |  | 26 | 103 | 252 | 281
EBITDA |  | 29,465 | 23,418 | 82,822 | 63,829
Restructuring charges, net |  | 484 |  | 484 | 1,151
Adjusted EBITDA |  | 29,949 | 23,418 | 83,306 | 64,980
Operating Segments | Executive Recruitment | EMEA |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Fee revenue |  | 35,498 | 36,816 | 108,158 | 113,788
Total revenue |  | 36,417 | 37,868 | 111,097 | 117,351
Operating income (loss) |  | 1,707 | 5,073 | 14,912 | 13,337
Depreciation and amortization |  | 213 | 431 | 810 | 1,366
Other (loss) income, net |  | 77 | 24 | 227 | 69
EBITDA |  | 1,997 | 5,528 | 15,949 | 14,772
Restructuring charges, net |  | 5,866 |  | 5,866 | 3,987
Adjusted EBITDA |  | 7,863 | 5,528 | 21,815 | 18,759
Operating Segments | Executive Recruitment | Asia Pacific |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Fee revenue |  | 19,094 | 20,924 | 59,307 | 61,615
Total revenue |  | 19,603 | 21,874 | 61,210 | 63,959
Operating income (loss) |  | 2,775 | 4,096 | 9,668 | 10,042
Depreciation and amortization |  | 235 | 216 | 704 | 771
Other (loss) income, net |  | (114) | 25 | (102) | 283
EBITDA |  | 2,896 | 4,337 | 10,270 | 11,096
Restructuring charges, net |  | 577 |  | 577 | 17
Adjusted EBITDA |  | 3,473 | 4,337 | 10,847 | 11,113
Operating Segments | Executive Recruitment | South America |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Fee revenue |  | 6,541 | 7,713 | 19,083 | 22,366
Total revenue |  | 6,545 | 7,724 | 19,095 | 22,416
Operating income (loss) |  | 1,166 | 1,741 | 3,644 | 3,513
Depreciation and amortization |  | 73 | 79 | 224 | 249
Other (loss) income, net |  | 9 | 41 | 281 | 87
EBITDA |  | 1,248 | 1,861 | 4,149 | 3,849
Restructuring charges, net |  | 328 | (148) | 328 | 229
Adjusted EBITDA |  | 1,576 | 1,713 | 4,477 | 4,078
Operating Segments | Hay Group |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Fee revenue |  | 140,508 | 64,313 | 283,350 | 194,269
Total revenue |  | 146,079 | 66,048 | 293,511 | 199,945
Operating income (loss) |  | (21,559) | 8,577 | (6,286) | 19,799
Depreciation and amortization |  | 6,722 | 3,317 | 14,058 | 9,848
Other (loss) income, net |  | 143 | (156) | (737) | (111)
EBITDA |  | (14,694) | 11,738 | 7,035 | 29,536
Restructuring charges, net |  | 23,241 |  | 23,241 | 2,758
Integration/acquisition costs |  | 8,413 |  | 12,052 |
Deferred revenue adjustment due to acquisition |  | 5,871 |  | 5,871 |
Adjusted EBITDA |  | 22,831 | 11,738 | 48,199 | 32,294
Operating Segments | Futurestep |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Fee revenue |  | 48,997 | 41,753 | 145,587 | 121,342
Total revenue |  | 53,138 | 43,836 | 156,946 | 126,387
Operating income (loss) |  | 6,630 | 5,760 | 19,715 | 14,367
Depreciation and amortization |  | 609 | 469 | 1,772 | 1,374
Other (loss) income, net |  | 79 | 4 | 87 | 27
EBITDA |  | 7,318 | 6,233 | 21,574 | 15,768
Restructuring charges, net |  |  | (270) |  | 1,154
Adjusted EBITDA |  | 7,318 | 5,963 | 21,574 | 16,922
Corporate |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating income (loss) |  | (33,743) | (14,993) | (74,327) | (35,910)
Depreciation and amortization |  | 1,666 | 1,435 | 4,894 | 4,093
Other (loss) income, net |  | (6,956) | (1,191) | (9,143) | 2,608
Equity in earnings of unconsolidated subsidiaries, net |  | 155 | 675 | 1,194 | 1,415
EBITDA |  | (38,878) | (14,074) | (77,382) | (27,794)
Restructuring charges, net |  | 81 |  | 81 | 172
Integration/acquisition costs |  | 12,734 |  | 21,763 |
Acquisition costs |  |  | 445 |  | 445
Separation costs |  | 744 |  | 744 |
Adjusted EBITDA |  | $ (25,319) | $ (13,629) | $ (54,794) | $ (27,177)

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