Stock-Based Compensation (Summary of Stock Option Activity) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Nov. 30, 2012 Y
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding, number of shares, beginning of year	7,743
Granted, number of shares	1,026
Exercised, number of shares	(1,488)
Canceled, number of shares	(2,077)
Options outstanding, number of shares, end of year	5,204
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Options outstanding, weighted average exercise price, beginning of year (in dollars per share)	$ 19.77
Granted, weighted average exercise price (in dollars per share)	$ 20.87
Exercised, weighted average exercise price (in dollars per share)	$ 15.75
Canceled, weighted average exercise price (in dollars per share)	$ 22.63
Options outstanding, weighted average exercise price, end of year (in dollars per share)	$ 19.99
Options Outstanding November 30, 2012, weighted average remaining contractual term (in years)	2.38
Options outstanding, November 30, 2012, aggregate intrinsic value (in dollars)	$ 8,975	[1]
Exercisable, November 30, 2012, number of shares	4,123
Exercisable, November 30, 2012, weighted average exercise price (in dollars per share)	$ 19.47
Exercisable, November 30, 2012, weighted average remaining contractual term (in years)	1.88
Exercisable, November 30, 2012, aggregate intrinsic value (in dollars)	7,866	[1]
Vested or expected to vest, November 30, 2012, number of shares	5,204
Vested or expected to vest, November 30, 2012, weighted average exercise price (in dollars per share)	$ 19.99
Vested or expected to vest, November 30, 2012, weighted average remaining contractual term (in years)	2.38
Vested or expected to vest, November 30, 2012, aggregate intrinsic value (in dollars)	$ 8,975	[1]

[1] The aggregate intrinsic value was calculated based on the difference between the closing price of our stock on November 30, 2012 of $20.11 and the exercise prices for all in-the-money options outstanding.