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Business Segments (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 30, 2017 | Jan. 31, 2017 | Oct. 31, 2016 | Jul. 31, 2016 | Apr. 30, 2016 | Jan. 31, 2016 | Oct. 31, 2015 | Jul. 31, 2015 | Apr. 30, 2017 | Apr. 30, 2016 | Apr. 30, 2015
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fee revenue |  | $ 406,065 | $ 381,918 | $ 401,917 | $ 375,621 | $ 399,960 | $ 344,158 | $ 280,600 | $ 267,394 | $ 1,565,521 | $ 1,292,112 |  | $ 1,028,152 |
Deferred revenue adjustment due to acquisition |  |  |  |  |  |  |  |  |  | 3,535 | 10,967 |  |  |
Adjusted fee revenue |  |  |  |  |  |  |  |  |  | 1,569,056 | 1,303,079 |  |  |
Total revenue |  |  |  |  |  |  |  |  |  | 1,621,669 | 1,346,714 |  | 1,066,066 |
Net income attributable to Korn/Ferry International |  | 26,924 | 23,897 | 30,152 | 3,208 | 5,855 | (15,995) | 17,971 | 23,082 | 84,181 | 30,913 |  | 88,357 |
Net income attributable to noncontrolling interest |  |  |  |  |  |  |  |  |  | 3,057 | 520 |  |  |
Other (income) loss, net |  |  |  |  |  |  |  |  |  | (11,820) | 4,167 |  | (7,458) |
Interest (income) expense, net |  |  |  |  |  |  |  |  |  | 10,251 | (237) |  | 1,784 |
Equity in earnings of unconsolidated subsidiaries, net |  |  |  |  |  |  |  |  |  | (333) | (1,631) |  | (2,181) |
Income tax provision |  |  |  |  |  |  |  |  |  | 29,104 | 18,960 |  | 33,526 |
Operating income (loss) |  | 32,834 | $ 30,542 | $ 46,548 | $ 4,516 | 4,842 | $ (14,067) | $ 29,013 | $ 32,904 | 114,440 | 52,692 |  | 114,028 |
Depreciation and amortization |  |  |  |  |  |  |  |  |  | 47,260 | 36,220 |  | 27,597 |
Other income (loss), net |  |  |  |  |  |  |  |  |  | 11,820 | (4,167) |  | 7,458 |
Equity in earnings of unconsolidated subsidiaries, net |  |  |  |  |  |  |  |  |  | 333 | 1,631 |  | 2,181 |
EBITDA |  |  |  |  |  |  |  |  |  | 173,853 | 86,376 |  | 151,264 |
Restructuring charges, net |  |  |  |  |  |  |  |  |  | 34,600 | 33,013 |  | 9,468 |
Integration/acquisition costs |  |  |  |  |  |  |  |  |  | 22,379 | 45,409 | [1] | 959 | [2]
Venezuelan foreign currency loss |  |  |  |  |  |  |  |  |  |  | 13,720 |  |  |
Deferred revenue adjustment due to acquisition |  |  |  |  |  |  |  |  |  | 3,535 | 10,967 |  |  |
Separation costs |  |  |  |  |  |  |  |  |  | 609 | 744 |  |  |
Adjusted EBITDA |  |  |  |  |  |  |  |  |  | 234,976 | 190,229 |  | 161,691 |
Identifiable assets | [3] | 2,062,898 |  |  |  | 1,898,600 |  |  |  | 2,062,898 | 1,898,600 |  | 1,317,801 |
Long-lived assets | [3] | 109,567 |  |  |  | 95,436 |  |  |  | 109,567 | 95,436 |  | 62,088 |
Goodwill | [3] | 576,865 |  |  |  | 590,072 |  |  |  | 576,865 | 590,072 |  | 254,440 |
Operating Segments | Executive Search |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fee revenue |  |  |  |  |  |  |  |  |  | 617,676 | 622,914 |  | 597,407 |
Adjusted fee revenue |  |  |  |  |  |  |  |  |  | 617,676 | 622,914 |  |  |
Total revenue |  |  |  |  |  |  |  |  |  | 636,193 | 644,528 |  | 619,325 |
Operating income (loss) |  |  |  |  |  |  |  |  |  | 124,252 | 131,706 |  | 119,020 |
Depreciation and amortization |  |  |  |  |  |  |  |  |  | 6,385 | 5,549 |  | 6,674 |
Other income (loss), net |  |  |  |  |  |  |  |  |  | 1,813 | 619 |  | 849 |
Equity in earnings of unconsolidated subsidiaries, net |  |  |  |  |  |  |  |  |  | 333 | 437 |  | 426 |
EBITDA |  |  |  |  |  |  |  |  |  | 132,783 | 138,311 |  | 126,969 |
Restructuring charges, net |  |  |  |  |  |  |  |  |  | 4,616 | 7,205 |  | 5,384 |
Venezuelan foreign currency loss |  |  |  |  |  |  |  |  |  |  | 6,635 |  |  |
Adjusted EBITDA |  |  |  |  |  |  |  |  |  | 137,399 | 152,151 |  | 132,353 |
Identifiable assets | [3] | 613,738 |  |  |  | 488,411 |  |  |  | 613,738 | 488,411 |  | 602,945 |
Long-lived assets | [3] | 46,468 |  |  |  | 29,048 |  |  |  | 46,468 | 29,048 |  | 26,357 |
Goodwill | [3] | 92,149 |  |  |  | 95,485 |  |  |  | 92,149 | 95,485 |  | 96,497 |
Operating Segments | Executive Search | North America |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fee revenue |  |  |  |  |  |  |  |  |  | 356,625 | 371,345 |  | 330,634 |
Adjusted fee revenue |  |  |  |  |  |  |  |  |  | 356,625 | 371,345 |  |  |
Total revenue |  |  |  |  |  |  |  |  |  | 369,803 | 386,256 |  | 344,913 |
Operating income (loss) |  |  |  |  |  |  |  |  |  | 81,550 | 100,381 |  | 80,818 |
Depreciation and amortization |  |  |  |  |  |  |  |  |  | 3,812 | 3,267 |  | 3,515 |
Other income (loss), net |  |  |  |  |  |  |  |  |  | 844 | (147) |  | 288 |
Equity in earnings of unconsolidated subsidiaries, net |  |  |  |  |  |  |  |  |  | 333 | 437 |  | 426 |
EBITDA |  |  |  |  |  |  |  |  |  | 86,539 | 103,938 |  | 85,047 |
Restructuring charges, net |  |  |  |  |  |  |  |  |  | 1,719 | 499 |  | 1,151 |
Adjusted EBITDA |  |  |  |  |  |  |  |  |  | 88,258 | 104,437 |  | 86,198 |
Identifiable assets | [3] | 340,069 |  |  |  | 227,228 |  |  |  | 340,069 | 227,228 |  | 327,446 |
Long-lived assets | [3] | 23,746 |  |  |  | 19,044 |  |  |  | 23,746 | 19,044 |  | 17,271 |
Goodwill | [3] | 46,201 |  |  |  | 48,320 |  |  |  | 46,201 | 48,320 |  | 49,603 |
Operating Segments | Executive Search | EMEA |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fee revenue |  |  |  |  |  |  |  |  |  | 146,506 | 144,319 |  | 153,465 |
Adjusted fee revenue |  |  |  |  |  |  |  |  |  | 146,506 | 144,319 |  |  |
Total revenue |  |  |  |  |  |  |  |  |  | 150,113 | 148,285 |  | 158,052 |
Operating income (loss) |  |  |  |  |  |  |  |  |  | 27,854 | 20,607 |  | 18,867 |
Depreciation and amortization |  |  |  |  |  |  |  |  |  | 1,030 | 1,029 |  | 1,764 |
Other income (loss), net |  |  |  |  |  |  |  |  |  | (15) | 433 |  | 83 |
EBITDA |  |  |  |  |  |  |  |  |  | 28,869 | 22,069 |  | 20,714 |
Restructuring charges, net |  |  |  |  |  |  |  |  |  | 629 | 5,807 |  | 3,987 |
Adjusted EBITDA |  |  |  |  |  |  |  |  |  | 29,498 | 27,876 |  | 24,701 |
Identifiable assets | [3] | 158,927 |  |  |  | 150,516 |  |  |  | 158,927 | 150,516 |  | 156,072 |
Long-lived assets | [3] | 11,089 |  |  |  | 4,817 |  |  |  | 11,089 | 4,817 |  | 3,885 |
Goodwill | [3] | 44,976 |  |  |  | 46,193 |  |  |  | 44,976 | 46,193 |  | 45,922 |
Operating Segments | Executive Search | Asia Pacific |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fee revenue |  |  |  |  |  |  |  |  |  | 80,169 | 80,506 |  | 84,148 |
Adjusted fee revenue |  |  |  |  |  |  |  |  |  | 80,169 | 80,506 |  |  |
Total revenue |  |  |  |  |  |  |  |  |  | 81,744 | 83,206 |  | 87,142 |
Operating income (loss) |  |  |  |  |  |  |  |  |  | 8,580 | 12,572 |  | 14,631 |
Depreciation and amortization |  |  |  |  |  |  |  |  |  | 1,060 | 941 |  | 1,045 |
Other income (loss), net |  |  |  |  |  |  |  |  |  | 300 | 21 |  | 369 |
EBITDA |  |  |  |  |  |  |  |  |  | 9,940 | 13,534 |  | 16,045 |
Restructuring charges, net |  |  |  |  |  |  |  |  |  | 1,495 | 577 |  | 17 |
Adjusted EBITDA |  |  |  |  |  |  |  |  |  | 11,435 | 14,111 |  | 16,062 |
Identifiable assets | [3] | 87,845 |  |  |  | 86,394 |  |  |  | 87,845 | 86,394 |  | 94,099 |
Long-lived assets | [3] | 8,371 |  |  |  | 3,708 |  |  |  | 8,371 | 3,708 |  | 4,235 |
Goodwill | [3] | 972 |  |  |  | 972 |  |  |  | 972 | 972 |  | 972 |
Operating Segments | Executive Search | Latin America |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fee revenue |  |  |  |  |  |  |  |  |  | 34,376 | 26,744 |  | 29,160 |
Adjusted fee revenue |  |  |  |  |  |  |  |  |  | 34,376 | 26,744 |  |  |
Total revenue |  |  |  |  |  |  |  |  |  | 34,533 | 26,781 |  | 29,218 |
Operating income (loss) |  |  |  |  |  |  |  |  |  | 6,268 | (1,854) |  | 4,704 |
Depreciation and amortization |  |  |  |  |  |  |  |  |  | 483 | 312 |  | 350 |
Other income (loss), net |  |  |  |  |  |  |  |  |  | 684 | 312 |  | 109 |
EBITDA |  |  |  |  |  |  |  |  |  | 7,435 | (1,230) |  | 5,163 |
Restructuring charges, net |  |  |  |  |  |  |  |  |  | 773 | 322 |  | 229 |
Venezuelan foreign currency loss |  |  |  |  |  |  |  |  |  |  | 6,635 |  |  |
Adjusted EBITDA |  |  |  |  |  |  |  |  |  | 8,208 | 5,727 |  | 5,392 |
Identifiable assets | [3] | 26,897 |  |  |  | 24,273 |  |  |  | 26,897 | 24,273 |  | 25,328 |
Long-lived assets | [3] | 3,262 |  |  |  | 1,479 |  |  |  | 3,262 | 1,479 |  | 966 |
Operating Segments | Hay Group |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fee revenue |  |  |  |  |  |  |  |  |  | 724,186 | 471,145 |  | 267,018 |
Deferred revenue adjustment due to acquisition |  |  |  |  |  |  |  |  |  | 3,535 | 10,967 |  |  |
Adjusted fee revenue |  |  |  |  |  |  |  |  |  | 727,721 | 482,112 |  |  |
Total revenue |  |  |  |  |  |  |  |  |  | 741,533 | 488,217 |  | 275,220 |
Operating income (loss) |  |  |  |  |  |  |  |  |  | 47,302 | (3,415) |  | 28,175 |
Depreciation and amortization |  |  |  |  |  |  |  |  |  | 32,262 | 21,854 |  | 13,427 |
Other income (loss), net |  |  |  |  |  |  |  |  |  | 341 | (868) |  | (22) |
EBITDA |  |  |  |  |  |  |  |  |  | 79,905 | 17,571 |  | 41,580 |
Restructuring charges, net |  |  |  |  |  |  |  |  |  | 29,663 | 25,682 |  | 2,758 |
Integration/acquisition costs |  |  |  |  |  |  |  |  |  | 14,440 | 17,607 |  |  |
Venezuelan foreign currency loss |  |  |  |  |  |  |  |  |  |  | 7,085 |  |  |
Deferred revenue adjustment due to acquisition |  |  |  |  |  |  |  |  |  | 3,535 | 10,967 |  |  |
Separation costs |  |  |  |  |  |  |  |  |  | 609 |  |  |  |
Adjusted EBITDA |  |  |  |  |  |  |  |  |  | 128,152 | 78,912 |  | 44,338 |
Identifiable assets | [3] | 1,057,611 |  |  |  | 1,005,457 |  |  |  | 1,057,611 | 1,005,457 |  | 265,546 |
Long-lived assets | [3] | 37,846 |  |  |  | 42,974 |  |  |  | 37,846 | 42,974 |  | 12,377 |
Goodwill | [3] | 457,241 |  |  |  | 465,937 |  |  |  | 457,241 | 465,937 |  | 129,549 |
Operating Segments | Futurestep |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fee revenue |  |  |  |  |  |  |  |  |  | 223,659 | 198,053 |  | 163,727 |
Adjusted fee revenue |  |  |  |  |  |  |  |  |  | 223,659 | 198,053 |  |  |
Total revenue |  |  |  |  |  |  |  |  |  | 243,943 | 213,969 |  | 171,521 |
Operating income (loss) |  |  |  |  |  |  |  |  |  | 29,986 | 26,702 |  | 19,940 |
Depreciation and amortization |  |  |  |  |  |  |  |  |  | 2,818 | 2,386 |  | 1,882 |
Other income (loss), net |  |  |  |  |  |  |  |  |  | (91) | 364 |  | 54 |
EBITDA |  |  |  |  |  |  |  |  |  | 32,713 | 29,452 |  | 21,876 |
Restructuring charges, net |  |  |  |  |  |  |  |  |  | 101 | 49 |  | 1,154 |
Adjusted EBITDA |  |  |  |  |  |  |  |  |  | 32,814 | 29,501 |  | 23,030 |
Identifiable assets | [3] | 116,717 |  |  |  | 104,396 |  |  |  | 116,717 | 104,396 |  | 103,782 |
Long-lived assets | [3] | 6,693 |  |  |  | 4,635 |  |  |  | 6,693 | 4,635 |  | 4,204 |
Goodwill | [3] | 27,475 |  |  |  | 28,650 |  |  |  | 27,475 | 28,650 |  | 28,394 |
Corporate |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating income (loss) |  |  |  |  |  |  |  |  |  | (87,100) | (102,301) |  | (53,107) |
Depreciation and amortization |  |  |  |  |  |  |  |  |  | 5,795 | 6,431 |  | 5,614 |
Other income (loss), net |  |  |  |  |  |  |  |  |  | 9,757 | (4,282) |  | 6,577 |
Equity in earnings of unconsolidated subsidiaries, net |  |  |  |  |  |  |  |  |  |  | 1,194 |  | 1,755 |
EBITDA |  |  |  |  |  |  |  |  |  | (71,548) | (98,958) |  | (39,161) |
Restructuring charges, net |  |  |  |  |  |  |  |  |  | 220 | 77 |  | 172 |
Integration/acquisition costs |  |  |  |  |  |  |  |  |  | 7,939 | 27,802 |  | 959 |
Separation costs |  |  |  |  |  |  |  |  |  |  | 744 |  |  |
Adjusted EBITDA |  |  |  |  |  |  |  |  |  | (63,389) | (70,335) |  | (38,030) |
Identifiable assets | [3] | 274,832 |  |  |  | 300,336 |  |  |  | 274,832 | 300,336 |  | 345,528 |
Long-lived assets | [3] | $ 18,560 |  |  |  | $ 18,779 |  |  |  | $ 18,560 | $ 18,779 |  | $ 19,150 |
[1] | On December 1, 2015, the Company completed its acquisition of Legacy Hay, a global leader in people strategy and organizational performance, for $476.9 million, net of cash acquired. The purchase price consisted of $259.0 million in cash ($54 million from foreign locations), net of estimated cash acquired and 5,922,136 shares of the Company's common stock, par value $0.01 per share (the "Consideration Shares"), representing an aggregate value of $217.9 million based on the closing price of the Company's common stock on The New York Stock Exchange on November 30, 2015. On November 23, 2015, the Company borrowed $150 million from the Term Facility, to finance a portion of the Legacy Hay acquisition purchase price. As part of the acquisition, the Company has committed to a $40 million retention pool (of which $9.0 million was paid in fiscal 2017) for certain employees of Legacy Hay subject to certain circumstances. Of the remaining balance, 50% will be payable within 45 days after November 30, 2017 and the remaining 50% will be payable within 45 days after November 30, 2018. The acquisition strengthens the Company's intellectual property, enhances our geographical presence, adds complimentary capabilities to further leverage search relationships and broadens capabilities for assessment and development. It improves our ability to support the global business community not only in attracting top talent and designing compensation and reward incentives, but also with an integrated approach to the entire leadership and people continuum. Actual results of operations of Legacy Hay are included in the Company's consolidated financial statements from December 1, 2015, the effective date of the acquisition, and includes $186.8 million, $740.2 million and $28.5 million in fee revenue, total assets and Adjusted EBITDA, respectively, with an Adjusted EBITDA margin of 14.4%, during fiscal 2016. Legacy Hay is included in the Hay Group segment.
[2] | On March 1, 2015, the Company acquired all outstanding membership interests of Pivot Leadership, a global provider of innovative, customized and scalable executive development programs, for $17.5 million, net of cash acquired, which includes $2.2 million in contingent consideration. As of April 30, 2017 and 2016, the fair value of the contingent consideration is $1.3 million and $3.0 million and is included in other liabilities in the accompanying consolidated balance sheets. The contingent consideration is based on the achievement of certain revenue targets and can be up to $6.5 million, payable in four installments in fiscal 2017 to 2020. In fiscal 2017, the Company paid $1.1 million due to meeting certain revenue targets. The acquisition allows us to integrate the Company's talent management solution with Pivot's executive learning capabilities. Actual results of operations of Pivot Leadership are included in the Company's consolidated financial statements from March 1, 2015, the effective date of the acquisition, and includes $3.7 million and $20.0 million in fee revenue and total assets, respectively, during fiscal 2015. Tax deductible goodwill from the Pivot Leadership acquisition was $7.4 million as of April 30, 2017 and 2016.
[3] | As of the end of the fiscal year.

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