Share-Based Compensation Expense (Details 1) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Oct. 31, 2011 years	Oct. 31, 2010	Oct. 31, 2009	Oct. 31, 2008
Summarizes information with respect to stock options outstanding
Range of Exercise Price, Lower (per share)	$ 0.94
Range of Exercise Price, Upper (per share)	$ 267.52
Number of Shares, Options Outstanding	3,690
Number of Shares, Vested Options	3,531
Weighted Average, Outstanding Options Remaining Contractual Life (Years)	3.61
Weighted Average, Vested Options Remaining Contractual Life (Years)	3.45
Weighted Average Exercise Price, Options Outstanding (per share)	$ 30.01	$ 40.96	$ 45.80	$ 48.84
Weighted Average Exercise Price, Vested Options (per share)	$ 30.64
Aggregate Intrinsic Value, Options Outstanding	$ 2,161
Aggregate Intrinsic Value, Vested Options	1,780
Range of Exercise Price Range One [Member]
Summarizes information with respect to stock options outstanding
Range of Exercise Price, Lower (per share)	$ 0.94
Range of Exercise Price, Upper (per share)	$ 16.31
Number of Shares, Options Outstanding	380
Number of Shares, Vested Options	277
Weighted Average, Outstanding Options Remaining Contractual Life (Years)	6.03
Weighted Average, Vested Options Remaining Contractual Life (Years)	5.43
Weighted Average Exercise Price, Options Outstanding (per share)	$ 8.20
Weighted Average Exercise Price, Vested Options (per share)	$ 7.48
Aggregate Intrinsic Value, Options Outstanding	2,161
Aggregate Intrinsic Value, Vested Options	1,780
Range of Exercise Price Range Two [Member]
Summarizes information with respect to stock options outstanding
Range of Exercise Price, Lower (per share)	$ 16.52
Range of Exercise Price, Upper (per share)	$ 17.29
Number of Shares, Options Outstanding	404
Number of Shares, Vested Options	393
Weighted Average, Outstanding Options Remaining Contractual Life (Years)	3.76
Weighted Average, Vested Options Remaining Contractual Life (Years)	3.67
Weighted Average Exercise Price, Options Outstanding (per share)	$ 16.69
Weighted Average Exercise Price, Vested Options (per share)	$ 16.67
Aggregate Intrinsic Value, Options Outstanding	0
Aggregate Intrinsic Value, Vested Options	0
Range of Exercise Price Range Three [Member]
Summarizes information with respect to stock options outstanding
Range of Exercise Price, Lower (per share)	$ 17.43
Range of Exercise Price, Upper (per share)	$ 24.50
Number of Shares, Options Outstanding	555
Number of Shares, Vested Options	545
Weighted Average, Outstanding Options Remaining Contractual Life (Years)	3.63
Weighted Average, Vested Options Remaining Contractual Life (Years)	3.57
Weighted Average Exercise Price, Options Outstanding (per share)	$ 20.49
Weighted Average Exercise Price, Vested Options (per share)	$ 20.49
Aggregate Intrinsic Value, Options Outstanding	0
Aggregate Intrinsic Value, Vested Options	0
Range of Exercise Price Range Four [Member]
Summarizes information with respect to stock options outstanding
Range of Exercise Price, Lower (per share)	$ 24.69
Range of Exercise Price, Upper (per share)	$ 28.28
Number of Shares, Options Outstanding	422
Number of Shares, Vested Options	414
Weighted Average, Outstanding Options Remaining Contractual Life (Years)	5.01
Weighted Average, Vested Options Remaining Contractual Life (Years)	4.99
Weighted Average Exercise Price, Options Outstanding (per share)	$ 26.98
Weighted Average Exercise Price, Vested Options (per share)	$ 26.98
Aggregate Intrinsic Value, Options Outstanding	0
Aggregate Intrinsic Value, Vested Options	0
Range of Exercise Price Range Five [Member]
Summarizes information with respect to stock options outstanding
Range of Exercise Price, Lower (per share)	$ 28.61
Range of Exercise Price, Upper (per share)	$ 31.43
Number of Shares, Options Outstanding	284
Number of Shares, Vested Options	276
Weighted Average, Outstanding Options Remaining Contractual Life (Years)	3.85
Weighted Average, Vested Options Remaining Contractual Life (Years)	3.77
Weighted Average Exercise Price, Options Outstanding (per share)	$ 29.78
Weighted Average Exercise Price, Vested Options (per share)	$ 29.76
Aggregate Intrinsic Value, Options Outstanding	0
Aggregate Intrinsic Value, Vested Options	0
Range of Exercise Price Range Six [Member]
Summarizes information with respect to stock options outstanding
Range of Exercise Price, Lower (per share)	$ 31.71
Range of Exercise Price, Upper (per share)	$ 32.55
Number of Shares, Options Outstanding	524
Number of Shares, Vested Options	521
Weighted Average, Outstanding Options Remaining Contractual Life (Years)	1.34
Weighted Average, Vested Options Remaining Contractual Life (Years)	1.31
Weighted Average Exercise Price, Options Outstanding (per share)	$ 31.72
Weighted Average Exercise Price, Vested Options (per share)	$ 31.72
Aggregate Intrinsic Value, Options Outstanding	0
Aggregate Intrinsic Value, Vested Options	0
Range of Exercise Price Range Seven [Member]
Summarizes information with respect to stock options outstanding
Range of Exercise Price, Lower (per share)	$ 33.00
Range of Exercise Price, Upper (per share)	$ 37.10
Number of Shares, Options Outstanding	350
Number of Shares, Vested Options	337
Weighted Average, Outstanding Options Remaining Contractual Life (Years)	5.54
Weighted Average, Vested Options Remaining Contractual Life (Years)	5.51
Weighted Average Exercise Price, Options Outstanding (per share)	$ 35.17
Weighted Average Exercise Price, Vested Options (per share)	$ 35.19
Aggregate Intrinsic Value, Options Outstanding	0
Aggregate Intrinsic Value, Vested Options	0
Range Of Exercise Price Range Eight [Member]
Summarizes information with respect to stock options outstanding
Range of Exercise Price, Lower (per share)	$ 37.31
Range of Exercise Price, Upper (per share)	$ 47.32
Number of Shares, Options Outstanding	511
Number of Shares, Vested Options	508
Weighted Average, Outstanding Options Remaining Contractual Life (Years)	2.95
Weighted Average, Vested Options Remaining Contractual Life (Years)	2.93
Weighted Average Exercise Price, Options Outstanding (per share)	$ 44.72
Weighted Average Exercise Price, Vested Options (per share)	$ 44.72
Aggregate Intrinsic Value, Options Outstanding	0
Aggregate Intrinsic Value, Vested Options	0
Range Of Exercise Price Range Nine [Member]
Summarizes information with respect to stock options outstanding
Range of Exercise Price, Lower (per share)	$ 47.53
Range of Exercise Price, Upper (per share)	$ 167.09
Number of Shares, Options Outstanding	257
Number of Shares, Vested Options	257
Weighted Average, Outstanding Options Remaining Contractual Life (Years)	0.57
Weighted Average, Vested Options Remaining Contractual Life (Years)	0.57
Weighted Average Exercise Price, Options Outstanding (per share)	$ 66.85
Weighted Average Exercise Price, Vested Options (per share)	$ 66.85
Aggregate Intrinsic Value, Options Outstanding	0
Aggregate Intrinsic Value, Vested Options	0
Range Of Exercise Price Range Ten [Member]
Summarizes information with respect to stock options outstanding
Range of Exercise Price, Lower (per share)	$ 267.52
Range of Exercise Price, Upper (per share)	$ 267.52
Number of Shares, Options Outstanding	3
Number of Shares, Vested Options	3
Weighted Average, Outstanding Options Remaining Contractual Life (Years)	0.75
Weighted Average, Vested Options Remaining Contractual Life (Years)	0.75
Weighted Average Exercise Price, Options Outstanding (per share)	$ 267.52
Weighted Average Exercise Price, Vested Options (per share)	$ 267.52
Aggregate Intrinsic Value, Options Outstanding	0
Aggregate Intrinsic Value, Vested Options	$ 0