Stock-Based Compensation (Summary of Stock Option Activity) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Nov. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding, number of shares, beginning of year	1,989
Granted, number of shares	8
Exercised, number of shares	(736)	[1]
Canceled, number of shares	(46)
Options outstanding, number of shares, end of year	1,215
Exercisable, November 30, 2014, number of shares	1,146
Vested or expected to vest, November 30, 2014, number of shares	1,215
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)	$ 20.43
Granted, weighted average exercise price (in dollars per share)	$ 21.80
Exercised, weighted average exercise price (in dollars per share)	$ 18.81	[1]
Canceled, weighted average exercise price (in dollars per share)	$ 26.61
Options outstanding, weighted average exercise price, end of year (in dollars per share)	$ 21.19
Exercisable, November 30, 2014, weighted average exercise price (in dollars per share)	$ 21.09
Vested or expected to vest, November 30, 2014, weighted average exercise price (in dollars per share)	$ 21.19
Options Outstanding November 30, 2014, weighted average remaining contractual term (in years)	2 years 6 months 26 days
Exercisable, November 30, 2014 weighted average remaining contractual term (in years)	2 years 6 months
Vested or expected to vest, November 30, 2014, weighted average remaining contractual term (in years)	2 years 6 months 26 days
Options outstanding, November 30, 2014, aggregate intrinsic value	$ 6,880	[2]
Exercisable, November 30, 2014, aggregate intrinsic value	6,598	[2]
Vested or expected to vest, November 30, 2014, aggregate intrinsic value	$ 6,880	[2]

[1] Includes 46,000 options included in a stock-swap, which allowed optionees to pay the exercise price by surrendering shares already owned. The net shares of common stock resulting from option exercises is 690,000 as reflected in the statement of shareholders' equity.

[2] The aggregate intrinsic value was calculated based on the difference between the closing price of our stock on November 30, 2014 of $25.79 and the exercise prices for all in-the-money options outstanding.