Share-Based Compensation Expense (Details 1) (USD $) In Thousands, except Per Share data, unless otherwise specified	6 Months Ended
	Apr. 30, 2013	Oct. 31, 2012
Summarizes information with respect to stock options outstanding
Range of Exercise Price, Lower (in dollars per share)	$ 0.94
Range of Exercise Price, Upper (in dollars per share)	$ 55.79
Number of Underlying Shares, Options Outstanding	2,432
Weighted Average, Outstanding Options Remaining Contractual Life (Years)	2 years 9 months
Weighted Average Exercise Price, Options Outstanding (in dollars per share)	$ 26.88	$ 27.58
Aggregate Intrinsic Value, Options Outstanding	$ 1,710
Number of Underlying Shares, Vested Options	2,422
Weighted Average, Vested Options Remaining Contractual Life (Years)	2 years 8 months 27 days
Weighted Average Exercise Price, Vested Options (in dollars per share)	$ 26.94
Aggregate Intrinsic Value, Vested Options	1,686
Range of Exercise Price 0.94 to 16.31 [Member]
Summarizes information with respect to stock options outstanding
Range of Exercise Price, Lower (in dollars per share)	$ 0.94
Range of Exercise Price, Upper (in dollars per share)	$ 16.31
Number of Underlying Shares, Options Outstanding	274
Weighted Average, Outstanding Options Remaining Contractual Life (Years)	4 years 6 months 4 days
Weighted Average Exercise Price, Options Outstanding (in dollars per share)	$ 8.48
Aggregate Intrinsic Value, Options Outstanding	1,710
Number of Underlying Shares, Vested Options	264
Weighted Average, Vested Options Remaining Contractual Life (Years)	4 years 5 months 5 days
Weighted Average Exercise Price, Vested Options (in dollars per share)	$ 8.34
Aggregate Intrinsic Value, Vested Options	1,686
Range of Exercise Price 16.52 to 17.29 [Member]
Summarizes information with respect to stock options outstanding
Range of Exercise Price, Lower (in dollars per share)	$ 16.52
Range of Exercise Price, Upper (in dollars per share)	$ 17.29
Number of Underlying Shares, Options Outstanding	359
Weighted Average, Outstanding Options Remaining Contractual Life (Years)	2 years 1 month 28 days
Weighted Average Exercise Price, Options Outstanding (in dollars per share)	$ 16.67
Aggregate Intrinsic Value, Options Outstanding	0
Number of Underlying Shares, Vested Options	359
Weighted Average, Vested Options Remaining Contractual Life (Years)	2 years 1 month 28 days
Weighted Average Exercise Price, Vested Options (in dollars per share)	$ 16.67
Aggregate Intrinsic Value, Vested Options	0
Range of Exercise Price 17.43 to 24.50 [Member]
Summarizes information with respect to stock options outstanding
Range of Exercise Price, Lower (in dollars per share)	$ 17.43
Range of Exercise Price, Upper (in dollars per share)	$ 24.5
Number of Underlying Shares, Options Outstanding	480
Weighted Average, Outstanding Options Remaining Contractual Life (Years)	1 year 11 months 27 days
Weighted Average Exercise Price, Options Outstanding (in dollars per share)	$ 20.48
Aggregate Intrinsic Value, Options Outstanding	0
Number of Underlying Shares, Vested Options	480
Weighted Average, Vested Options Remaining Contractual Life (Years)	1 year 11 months 27 days
Weighted Average Exercise Price, Vested Options (in dollars per share)	$ 20.48
Aggregate Intrinsic Value, Vested Options	0
Range of Exercise Price 24.69 to 28.28 [Member]
Summarizes information with respect to stock options outstanding
Range of Exercise Price, Lower (in dollars per share)	$ 24.69
Range of Exercise Price, Upper (in dollars per share)	$ 28.28
Number of Underlying Shares, Options Outstanding	359
Weighted Average, Outstanding Options Remaining Contractual Life (Years)	3 years 6 months 4 days
Weighted Average Exercise Price, Options Outstanding (in dollars per share)	$ 26.97
Aggregate Intrinsic Value, Options Outstanding	0
Number of Underlying Shares, Vested Options	359
Weighted Average, Vested Options Remaining Contractual Life (Years)	3 years 6 months 4 days
Weighted Average Exercise Price, Vested Options (in dollars per share)	$ 26.97
Aggregate Intrinsic Value, Vested Options	0
Range of Exercise Price 28.61 to 31.43 [Member]
Summarizes information with respect to stock options outstanding
Range of Exercise Price, Lower (in dollars per share)	$ 28.61
Range of Exercise Price, Upper (in dollars per share)	$ 31.43
Number of Underlying Shares, Options Outstanding	162
Weighted Average, Outstanding Options Remaining Contractual Life (Years)	3 years 2 months 16 days
Weighted Average Exercise Price, Options Outstanding (in dollars per share)	$ 29.53
Aggregate Intrinsic Value, Options Outstanding	0
Number of Underlying Shares, Vested Options	162
Weighted Average, Vested Options Remaining Contractual Life (Years)	3 years 2 months 16 days
Weighted Average Exercise Price, Vested Options (in dollars per share)	$ 29.53
Aggregate Intrinsic Value, Vested Options	0
Range of Exercise Price 31.71 to 32.55 [Member]
Summarizes information with respect to stock options outstanding
Range of Exercise Price, Lower (in dollars per share)	$ 31.71
Range of Exercise Price, Upper (in dollars per share)	$ 32.55
Number of Underlying Shares, Options Outstanding	21
Weighted Average, Outstanding Options Remaining Contractual Life (Years)	4 years 7 months 17 days
Weighted Average Exercise Price, Options Outstanding (in dollars per share)	$ 31.92
Aggregate Intrinsic Value, Options Outstanding	0
Number of Underlying Shares, Vested Options	21
Weighted Average, Vested Options Remaining Contractual Life (Years)	4 years 7 months 17 days
Weighted Average Exercise Price, Vested Options (in dollars per share)	$ 31.92
Aggregate Intrinsic Value, Vested Options	0
Range of Exercise Price 33.00 to 37.10 [Member]
Summarizes information with respect to stock options outstanding
Range of Exercise Price, Lower (in dollars per share)	$ 33
Range of Exercise Price, Upper (in dollars per share)	$ 37.1
Number of Underlying Shares, Options Outstanding	297
Weighted Average, Outstanding Options Remaining Contractual Life (Years)	3 years 11 months 9 days
Weighted Average Exercise Price, Options Outstanding (in dollars per share)	$ 35.21
Aggregate Intrinsic Value, Options Outstanding	0
Number of Underlying Shares, Vested Options	297
Weighted Average, Vested Options Remaining Contractual Life (Years)	3 years 11 months 9 days
Weighted Average Exercise Price, Vested Options (in dollars per share)	$ 35.21
Aggregate Intrinsic Value, Vested Options	0
Range Of Exercise Price 37.31 to 47.32 [Member]
Summarizes information with respect to stock options outstanding
Range of Exercise Price, Lower (in dollars per share)	$ 37.31
Range of Exercise Price, Upper (in dollars per share)	$ 47.32
Number of Underlying Shares, Options Outstanding	456
Weighted Average, Outstanding Options Remaining Contractual Life (Years)	1 year 5 months 16 days
Weighted Average Exercise Price, Options Outstanding (in dollars per share)	$ 44.92
Aggregate Intrinsic Value, Options Outstanding	0
Number of Underlying Shares, Vested Options	456
Weighted Average, Vested Options Remaining Contractual Life (Years)	1 year 5 months 16 days
Weighted Average Exercise Price, Vested Options (in dollars per share)	$ 44.92
Aggregate Intrinsic Value, Vested Options	0
Range Of Exercise Price 47.53 to 55.79 [Member]
Summarizes information with respect to stock options outstanding
Range of Exercise Price, Lower (in dollars per share)	$ 47.53
Range of Exercise Price, Upper (in dollars per share)	$ 55.79
Number of Underlying Shares, Options Outstanding	24
Weighted Average, Outstanding Options Remaining Contractual Life (Years)	5 months 19 days
Weighted Average Exercise Price, Options Outstanding (in dollars per share)	$ 48.97
Aggregate Intrinsic Value, Options Outstanding	0
Number of Underlying Shares, Vested Options	24
Weighted Average, Vested Options Remaining Contractual Life (Years)	5 months 19 days
Weighted Average Exercise Price, Vested Options (in dollars per share)	$ 48.97
Aggregate Intrinsic Value, Vested Options	$ 0