Stock-Based Compensation and Benefit Plans - Summary of Company's Stock Option, Performance Share Unit and Restricted Share Activity (Detail) shares in Thousands | 3 Months Ended |
Apr. 30, 2017$ / sharesshares |
Stock Options | |
Number of Stock Options | |
Number of Stock Options, Beginning Balance (in shares) | shares | 918 |
Number of Stock Options, Granted (in shares) | shares | 572 |
Number of Stock Options, Exercised/released (in shares) | shares | 11 |
Number of Stock Options, Forfeited (in shares) | shares | 30 |
Number of Stock Options, Ending Balance (in shares) | shares | 1,449 |
Number of Stock Options, Exercisable at End of Period (in shares) | shares | 333 |
Weighted-Average Exercise Price of Stock Options | |
Weighted-Average Exercise Price, Options, Beginning Balance (in dollars per share) | $ / shares | $ 59.20 |
Weighted-Average Exercise Price, Options, Granted (in dollars per share) | $ / shares | 51.90 |
Weighted-Average Exercise Price, Options, Exercised/released (in dollars per share) | $ / shares | 25.82 |
Weighted-Average Exercise Price, Options, Forfeited (in dollars per share) | $ / shares | 60.99 |
Weighted-Average Exercise Price, Options, Ending Balance (in dollars per share) | $ / shares | 56.52 |
Weighted-Average Exercise Price, Options, Exercisable (in dollars per share) | $ / shares | $ 56.97 |
Performance-Based Restricted Stock Units | |
Number of Performance-Based Restricted Stock Units and Restricted Shares | |
Number of Units/Shares, Beginning Balance (in shares) | shares | 390 |
Number of Units/Shares, Granted (in shares) | shares | 176 |
Number of Units/Shares, Exercised/released (in shares) | shares | 0 |
Number of Units/Shares, Forfeited (in shares) | shares | 147 |
Number of Units/Shares, Ending Balance (in shares) | shares | 419 |
Weighted-Average Grant Date Fair Value | |
Weighted-Average Grant Date Fair Value, Beginning Balance (in dollars per share) | $ / shares | $ 61.05 |
Weighted-Average Grant Date Fair Value, Granted (in dollars per share) | $ / shares | 51.90 |
Weighted-Average Grant Date Fair Value, Exercised/released (in dollars per share) | $ / shares | 0 |
Weighted-Average Grant Date Fair Value, Forfeited (in dollars per share) | $ / shares | 52.50 |
Weighted-Average Grant Date Fair Value, Ending Balance (in dollars per share) | $ / shares | $ 60.21 |
Restricted Shares | |
Number of Performance-Based Restricted Stock Units and Restricted Shares | |
Number of Units/Shares, Beginning Balance (in shares) | shares | 14 |
Number of Units/Shares, Granted (in shares) | shares | 0 |
Number of Units/Shares, Exercised/released (in shares) | shares | 0 |
Number of Units/Shares, Forfeited (in shares) | shares | 0 |
Number of Units/Shares, Ending Balance (in shares) | shares | 14 |
Weighted-Average Grant Date Fair Value | |
Weighted-Average Grant Date Fair Value, Beginning Balance (in dollars per share) | $ / shares | $ 70.54 |
Weighted-Average Grant Date Fair Value, Granted (in dollars per share) | $ / shares | 52.26 |
Weighted-Average Grant Date Fair Value, Exercised/released (in dollars per share) | $ / shares | 0 |
Weighted-Average Grant Date Fair Value, Forfeited (in dollars per share) | $ / shares | 0 |
Weighted-Average Grant Date Fair Value, Ending Balance (in dollars per share) | $ / shares | $ 70.29 |
Restricted Stock Units | |
Number of Performance-Based Restricted Stock Units and Restricted Shares | |
Number of Units/Shares, Beginning Balance (in shares) | shares | 360 |
Number of Units/Shares, Granted (in shares) | shares | 298 |
Number of Units/Shares, Exercised/released (in shares) | shares | 88 |
Number of Units/Shares, Forfeited (in shares) | shares | 18 |
Number of Units/Shares, Ending Balance (in shares) | shares | 552 |
Weighted-Average Grant Date Fair Value | |
Weighted-Average Grant Date Fair Value, Beginning Balance (in dollars per share) | $ / shares | $ 62.99 |
Weighted-Average Grant Date Fair Value, Granted (in dollars per share) | $ / shares | 52.07 |
Weighted-Average Grant Date Fair Value, Exercised/released (in dollars per share) | $ / shares | 66 |
Weighted-Average Grant Date Fair Value, Forfeited (in dollars per share) | $ / shares | 58.38 |
Weighted-Average Grant Date Fair Value, Ending Balance (in dollars per share) | $ / shares | $ 56.77 |