Annual report pursuant to Section 13 and 15(d)

Basic and Diluted Earnings per Common Share Attributable to Common Stockholders (Detail)

v3.7.0.1
Basic and Diluted Earnings per Common Share Attributable to Common Stockholders (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ 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
Earnings Per Share Disclosure [Line Items]                      
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
Less: distributed and undistributed earnings to nonvested restricted stockholders                 765 280 860
Basic net earnings attributable to common stockholders                 83,416 30,633 87,497
Add: undistributed earnings to nonvested restricted stockholders                 560 82 815
Less: reallocation of undistributed earnings to nonvested restricted stockholders                 553 81 804
Diluted net earnings attributable to common stockholders                 $ 83,423 $ 30,634 $ 87,508
Basic weighted-average number of common shares outstanding                 56,205 52,372 49,052
Diluted weighted-average number of common shares outstanding                 56,900 52,929 49,766
Basic earnings per share $ 0.48 $ 0.42 $ 0.53 $ 0.06 $ 0.10 $ (0.30) $ 0.36 $ 0.46 $ 1.48 $ 0.58 $ 1.78
Diluted earnings per share $ 0.47 $ 0.42 $ 0.52 $ 0.06 $ 0.10 $ (0.30) $ 0.35 $ 0.46 $ 1.47 $ 0.58 $ 1.76
ESPP                      
Earnings Per Share Disclosure [Line Items]                      
Stock                 25 20 4
Restricted Stock                      
Earnings Per Share Disclosure [Line Items]                      
Stock                 646 487 605
Stock Options                      
Earnings Per Share Disclosure [Line Items]                      
Stock                 24 50 105