Shareholders' Equity - Summary of Company's Stock Options and Changes During the Period (Detail) - USD ($)
$ / shares in Units, $ in Thousands |
3 Months Ended |
12 Months Ended |
Jan. 31, 2016 |
Oct. 31, 2015 |
| Summary of Company's Stock Option Plans |
|
|
| Option Plan, options exercisable |
0
|
|
| 2005 Option Plan [Member] |
|
|
| Summary of Company's Stock Option Plans |
|
|
| Option Plan, options exercisable |
0
|
|
| Stock Options [Member] |
|
|
| Summary of Company's Stock Option Plans |
|
|
| Weighted Average Exercise Price per Option, Options outstanding, Beginning Balance |
$ 29.98
|
|
| Weighted Average Exercise Price per Option, Exercised |
33.80
|
|
| Weighted Average Exercise Price per Option, Options outstanding, Ending Balance |
29.59
|
$ 29.98
|
| Weighted Average Exercise Price per Option, Vested and expected to vest |
29.59
|
|
| Weighted Average Exercise Price per Option, Exercisable |
$ 29.27
|
|
| Weighted Average Remaining Contractual Term (years) |
|
|
| Weighted Average Remaining Contractual Term, Options outstanding |
3 years 7 months 6 days
|
3 years 8 months 12 days
|
| Weighted Average Remaining Contractual Term, Vested and expected to vest |
3 years 7 months 6 days
|
|
| Weighted Average Remaining Contractual Term, Exercisable |
3 years 3 months 18 days
|
|
| Aggregate Intrinsic Value |
|
|
| Aggregate Intrinsic Value, Options outstanding |
$ 2,797
|
$ 2,801
|
| Aggregate Intrinsic Value, Vested and expected to vest |
2,797
|
|
| Aggregate Intrinsic Value, Exercisable |
$ 2,503
|
|
| Stock Options [Member] | 2005 Option Plan [Member] |
|
|
| Summary of Company's Stock Option Plans |
|
|
| Option Plan, Options outstanding, Beginning Balance |
56,000
|
|
| Option Plan, Exercised |
(5,200)
|
|
| Option Plan, Options outstanding, Ending Balance |
50,800
|
56,000
|
| Option Plan, Vested and expected to vest |
50,800
|
|
| Option Plan, options exercisable |
45,200
|
50,400
|
| Stock Options [Member] | Minimum [Member] |
|
|
| Option plan |
|
|
| Option Price Per Share, Options outstanding, Beginning Balance |
$ 17.07
|
|
| Option Price Per Share, Exercised |
33.67
|
|
| Option Price Per Share, Options outstanding, Ending Balance |
17.07
|
$ 17.07
|
| Stock Options [Member] | Maximum [Member] |
|
|
| Option plan |
|
|
| Option Price Per Share, Options outstanding, Beginning Balance |
42.60
|
|
| Option Price Per Share, Exercised |
33.84
|
|
| Option Price Per Share, Options outstanding, Ending Balance |
$ 42.60
|
$ 42.60
|