Share-Based Compensation Expense - Stock Options Outstanding (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Oct. 31, 2017	Oct. 31, 2016
Summarizes information with respect to stock options outstanding
Weighted average exercise price, (in dollars per share)	$ 30.19	$ 26.90
$1.88 to $11.16
Summarizes information with respect to stock options outstanding
Range of exercise price, lower (in dollars per share)	1.88
Range of exercise price, upper (in dollars per share)	$ 11.16
Number of underlying shares (in shares)	65
Weighted average remaining contractual life (in years)	2 years 7 months 2 days
Weighted average exercise price, (in dollars per share)	$ 8.66
Aggregate intrinsic value	$ 801
Number of underlying shares, vested options (in shares)	65
Weighted average remaining contractual life, vested options (Years)	2 years 6 months 14 days
Weighted average exercise price, vested options (per share)	$ 8.64
Aggregate intrinsic value, vested options	$ 794
$11.34 to $17.24
Summarizes information with respect to stock options outstanding
Range of exercise price, lower (in dollars per share)	$ 11.34
Range of exercise price, upper (in dollars per share)	$ 17.24
Number of underlying shares (in shares)	176
Weighted average remaining contractual life (in years)	4 years 7 months 9 days
Weighted average exercise price, (in dollars per share)	$ 13.43
Aggregate intrinsic value	$ 1,321
Number of underlying shares, vested options (in shares)	172
Weighted average remaining contractual life, vested options (Years)	4 years 6 months 18 days
Weighted average exercise price, vested options (per share)	$ 13.40
Aggregate intrinsic value, vested options	$ 1,293
$17.50 to $30.46
Summarizes information with respect to stock options outstanding
Range of exercise price, lower (in dollars per share)	$ 17.50
Range of exercise price, upper (in dollars per share)	$ 30.46
Number of underlying shares (in shares)	127
Weighted average remaining contractual life (in years)	1 year 6 months 21 days
Weighted average exercise price, (in dollars per share)	$ 25.91
Aggregate intrinsic value	$ 73
Number of underlying shares, vested options (in shares)	121
Weighted average remaining contractual life, vested options (Years)	1 year 3 months 25 days
Weighted average exercise price, vested options (per share)	$ 26.20
Aggregate intrinsic value, vested options	$ 60
$31.93 to $37.10
Summarizes information with respect to stock options outstanding
Range of exercise price, lower (in dollars per share)	$ 31.93
Range of exercise price, upper (in dollars per share)	$ 37.10
Number of underlying shares (in shares)	291
Weighted average remaining contractual life (in years)	1 year 6 months 10 days
Weighted average exercise price, (in dollars per share)	$ 35.08
Aggregate intrinsic value	$ 0
Number of underlying shares, vested options (in shares)	290
Weighted average remaining contractual life, vested options (Years)	1 year 6 months 10 days
Weighted average exercise price, vested options (per share)	$ 35.08
Aggregate intrinsic value, vested options	$ 0
$37.82 to $55.63
Summarizes information with respect to stock options outstanding
Range of exercise price, lower (in dollars per share)	$ 37.82
Range of exercise price, upper (in dollars per share)	$ 55.63
Number of underlying shares (in shares)	216
Weighted average remaining contractual life (in years)	3 years 9 months 3 days
Weighted average exercise price, (in dollars per share)	$ 46.30
Aggregate intrinsic value	$ 0
Number of underlying shares, vested options (in shares)	216
Weighted average remaining contractual life, vested options (Years)	3 years 9 months 3 days
Weighted average exercise price, vested options (per share)	$ 46.30
Aggregate intrinsic value, vested options	$ 0
$1.88 to $55.63
Summarizes information with respect to stock options outstanding
Range of exercise price, lower (in dollars per share)	$ 1.88
Range of exercise price, upper (in dollars per share)	$ 55.63
Number of underlying shares (in shares)	875
Weighted average remaining contractual life (in years)	2 years 9 months 10 days
Weighted average exercise price, (in dollars per share)	$ 30.19
Aggregate intrinsic value	$ 2,195
Number of underlying shares, vested options (in shares)	864
Weighted average remaining contractual life, vested options (Years)	2 years 8 months 23 days
Weighted average exercise price, vested options (per share)	$ 30.35
Aggregate intrinsic value, vested options	$ 2,147
Stock Options
Summarizes information with respect to stock options outstanding
Expected volatility	35.87%
Risk-free interest rate	1.26%
Expected dividend yield	0.00%
Minimum | Stock Options
Summarizes information with respect to stock options outstanding
Expected term (years)	8 months 19 days
Maximum | Stock Options
Summarizes information with respect to stock options outstanding
Expected term (years)	6 years 10 months 17 days