Stockholders' Equity - Range Of Exercise Prices (Details) - 2009 Stock Option Plan $ / shares in Units, $ in Thousands	6 Months Ended
	May 31, 2016 USD ($) $ / shares shares
2009 Stock Option Plan
Outstanding at ending of the year (in shares) | shares	330,320
Weighted Avg. Exercise Price (in dollars per share)	$ 29.26
Weighted Avg. Remaining Contractual Life	6 years
Total Intrinsic Value | $	$ 1,051
$23.00-$28.00
2009 Stock Option Plan
Exercise prices, low end of range (in dollars per share)	$ 23.00
Exercise prices, high end of range (in dollars per share)	$ 28.00
Outstanding at ending of the year (in shares) | shares	124,793
Weighted Avg. Exercise Price (in dollars per share)	$ 26.67
Weighted Avg. Remaining Contractual Life	9 years 4 months 24 days
Total Intrinsic Value | $	$ 676
$28.00-$32.00
2009 Stock Option Plan
Exercise prices, low end of range (in dollars per share)	$ 28.00
Exercise prices, high end of range (in dollars per share)	$ 32.00
Outstanding at ending of the year (in shares) | shares	122,452
Weighted Avg. Exercise Price (in dollars per share)	$ 29.02
Weighted Avg. Remaining Contractual Life	4 years 10 months 24 days
Total Intrinsic Value | $	$ 375
$32.00-$39.00
2009 Stock Option Plan
Exercise prices, low end of range (in dollars per share)	$ 32.00
Exercise prices, high end of range (in dollars per share)	$ 39.00
Outstanding at ending of the year (in shares) | shares	83,075
Weighted Avg. Exercise Price (in dollars per share)	$ 33.52
Weighted Avg. Remaining Contractual Life	2 years 4 months 24 days