|
Share based awards - Summary of Options Outstanding and Options Exercisable Under Stock Option Plan (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
|
12 Months Ended |
|
Feb. 02, 2013
Y
|
| Compensation Related Costs Disclosure [Line Items] |
|
| Options outstanding Weighted- average remaining contractual life (years) |
8
|
| Options exercisable Weighted- average remaining contractual life (years) |
7
|
| Number of options, outstanding |
1,806,801
|
| Number of options, exercisable |
562,850
|
| Weighted- average exercise price, options outstanding |
$ 41.60
|
| Weighted- average exercise price, options exercisable |
$ 24.85
|
|
0.18 - 1.11 [Member]
|
|
| Compensation Related Costs Disclosure [Line Items] |
|
| Options outstanding Weighted- average remaining contractual life (years) |
2
|
| Options exercisable Weighted- average remaining contractual life (years) |
2
|
| Number of options, outstanding |
11,813
|
| Number of options, exercisable |
11,813
|
| Weighted- average exercise price, options outstanding |
$ 1.11
|
| Weighted- average exercise price, options exercisable |
$ 1.11
|
|
1.12 - 2.62 [Member]
|
|
| Compensation Related Costs Disclosure [Line Items] |
|
| Options outstanding Weighted- average remaining contractual life (years) |
2
|
| Options exercisable Weighted- average remaining contractual life (years) |
2
|
| Number of options, outstanding |
7,523
|
| Number of options, exercisable |
7,523
|
| Weighted- average exercise price, options outstanding |
$ 2.62
|
| Weighted- average exercise price, options exercisable |
$ 2.62
|
|
2.63 - 4.12 [Member]
|
|
| Compensation Related Costs Disclosure [Line Items] |
|
| Options outstanding Weighted- average remaining contractual life (years) |
4
|
| Options exercisable Weighted- average remaining contractual life (years) |
4
|
| Number of options, outstanding |
8,116
|
| Number of options, exercisable |
8,116
|
| Weighted- average exercise price, options outstanding |
$ 3.83
|
| Weighted- average exercise price, options exercisable |
$ 3.83
|
|
4.13 - 9.18 [Member]
|
|
| Compensation Related Costs Disclosure [Line Items] |
|
| Options outstanding Weighted- average remaining contractual life (years) |
7
|
| Options exercisable Weighted- average remaining contractual life (years) |
6
|
| Number of options, outstanding |
32,220
|
| Number of options, exercisable |
13,160
|
| Weighted- average exercise price, options outstanding |
$ 6.57
|
| Weighted- average exercise price, options exercisable |
$ 6.98
|
|
9.19 - 15.81 [Member]
|
|
| Compensation Related Costs Disclosure [Line Items] |
|
| Options outstanding Weighted- average remaining contractual life (years) |
6
|
| Options exercisable Weighted- average remaining contractual life (years) |
6
|
| Number of options, outstanding |
346,052
|
| Number of options, exercisable |
255,975
|
| Weighted- average exercise price, options outstanding |
$ 13.04
|
| Weighted- average exercise price, options exercisable |
$ 12.95
|
|
15.82 - 37.85 [Member]
|
|
| Compensation Related Costs Disclosure [Line Items] |
|
| Options outstanding Weighted- average remaining contractual life (years) |
8
|
| Options exercisable Weighted- average remaining contractual life (years) |
8
|
| Number of options, outstanding |
685,698
|
| Number of options, exercisable |
184,932
|
| Weighted- average exercise price, options outstanding |
$ 26.04
|
| Weighted- average exercise price, options exercisable |
$ 26.58
|
|
37.86 - 69.96 [Member]
|
|
| Compensation Related Costs Disclosure [Line Items] |
|
| Options outstanding Weighted- average remaining contractual life (years) |
9
|
| Options exercisable Weighted- average remaining contractual life (years) |
9
|
| Number of options, outstanding |
502,637
|
| Number of options, exercisable |
81,311
|
| Weighted- average exercise price, options outstanding |
$ 66.65
|
| Weighted- average exercise price, options exercisable |
$ 68.89
|
|
69.97 - 101.53 [Member]
|
|
| Compensation Related Costs Disclosure [Line Items] |
|
| Options outstanding Weighted- average remaining contractual life (years) |
10
|
| Options exercisable Weighted- average remaining contractual life (years) |
|
| Number of options, outstanding |
212,742
|
| Number of options, exercisable |
|
| Weighted- average exercise price, options outstanding |
$ 89.31
|
| Weighted- average exercise price, options exercisable |
|
|
Minimum [Member] | 0.18 - 1.11 [Member]
|
|
| Compensation Related Costs Disclosure [Line Items] |
|
| Options outstanding |
$ 0.18
|
|
Minimum [Member] | 1.12 - 2.62 [Member]
|
|
| Compensation Related Costs Disclosure [Line Items] |
|
| Options outstanding |
$ 1.12
|
|
Minimum [Member] | 2.63 - 4.12 [Member]
|
|
| Compensation Related Costs Disclosure [Line Items] |
|
| Options outstanding |
$ 2.63
|
|
Minimum [Member] | 4.13 - 9.18 [Member]
|
|
| Compensation Related Costs Disclosure [Line Items] |
|
| Options outstanding |
$ 4.13
|
|
Minimum [Member] | 9.19 - 15.81 [Member]
|
|
| Compensation Related Costs Disclosure [Line Items] |
|
| Options outstanding |
$ 9.19
|
|
Minimum [Member] | 15.82 - 37.85 [Member]
|
|
| Compensation Related Costs Disclosure [Line Items] |
|
| Options outstanding |
$ 15.82
|
|
Minimum [Member] | 37.86 - 69.96 [Member]
|
|
| Compensation Related Costs Disclosure [Line Items] |
|
| Options outstanding |
$ 37.86
|
|
Minimum [Member] | 69.97 - 101.53 [Member]
|
|
| Compensation Related Costs Disclosure [Line Items] |
|
| Options outstanding |
$ 69.97
|
|
Maximum [Member] | 0.18 - 1.11 [Member]
|
|
| Compensation Related Costs Disclosure [Line Items] |
|
| Options outstanding |
$ 1.11
|
|
Maximum [Member] | 1.12 - 2.62 [Member]
|
|
| Compensation Related Costs Disclosure [Line Items] |
|
| Options outstanding |
$ 2.62
|
|
Maximum [Member] | 2.63 - 4.12 [Member]
|
|
| Compensation Related Costs Disclosure [Line Items] |
|
| Options outstanding |
$ 4.12
|
|
Maximum [Member] | 4.13 - 9.18 [Member]
|
|
| Compensation Related Costs Disclosure [Line Items] |
|
| Options outstanding |
$ 9.18
|
|
Maximum [Member] | 9.19 - 15.81 [Member]
|
|
| Compensation Related Costs Disclosure [Line Items] |
|
| Options outstanding |
$ 15.81
|
|
Maximum [Member] | 15.82 - 37.85 [Member]
|
|
| Compensation Related Costs Disclosure [Line Items] |
|
| Options outstanding |
$ 37.85
|
|
Maximum [Member] | 37.86 - 69.96 [Member]
|
|
| Compensation Related Costs Disclosure [Line Items] |
|
| Options outstanding |
$ 69.96
|
|
Maximum [Member] | 69.97 - 101.53 [Member]
|
|
| Compensation Related Costs Disclosure [Line Items] |
|
| Options outstanding |
$ 101.53
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