Employee Benefits and Stock-based Compensation - Stock Option Activities (Detail) - USD ($)
$ / shares in Units, $ in Thousands |
12 Months Ended |
Jan. 31, 2022 |
Jan. 31, 2021 |
Jan. 31, 2020 |
| Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
|
|
|
| Shares, Outstanding |
719,143
|
1,124,646
|
1,459,064
|
| Shares, Granted |
14,700
|
51,200
|
66,850
|
| Shares, Assumed |
163,581
|
|
|
| Shares, Exercised |
(269,287)
|
(421,736)
|
(366,886)
|
| Shares, Forfeited |
(7,669)
|
(11,618)
|
(14,931)
|
| Shares, Expired |
(1,146)
|
(23,349)
|
(19,451)
|
| Shares, Outstanding |
619,322
|
719,143
|
1,124,646
|
| Shares, Exercisable |
399,764
|
|
|
| Weighted-Average Exercise Price, Outstanding |
$ 38.33
|
$ 32.93
|
$ 28.31
|
| Weighted-Average Exercise Price, Granted |
110.19
|
59.54
|
50.56
|
| Weighted-Average Exercise Price, Assumed |
23.10
|
|
|
| Weighted-Average Exercise Price, Exercised |
28.23
|
24.52
|
15.52
|
| Weighted-Average Exercise Price, Forfeited |
68.95
|
46.69
|
46.29
|
| Weighted-Average Exercise Price, Expired |
9.86
|
70.11
|
64.53
|
| Weighted-Average Exercise Price, Outstanding |
40.08
|
38.33
|
32.93
|
| Weighted-Average Exercise Price, Exercisable |
42.40
|
|
|
| Weighted-Average Grant-date Fair Value, Granted |
50.28
|
$ 28.37
|
$ 25.35
|
| Weighted-Average Acquisition-date Fair Value, Assumed |
$ 173.04
|
|
|
| Total Intrinsic Value of options Exercised |
$ 25,622
|
$ 19,401
|
$ 13,263
|
| Weighted-Average Remaining Contractual Term, Outstanding |
5 years 3 months
|
|
|
| Weighted-Average Remaining Contractual Term, Exercisable |
3 years 11 months 1 day
|
|
|
| Aggregate Intrinsic Value, Outstanding |
$ 61,975
|
|
|
| Aggregate Intrinsic Value, Exercisable |
$ 39,076
|
|
|