Stockholders' Equity - Range Of Exercise Prices (Details) - 2009 Stock Option Plan $ / shares in Units, $ in Thousands	12 Months Ended
	Nov. 30, 2018 USD ($) $ / shares shares
2009 Stock Option Plan
Outstanding at ending of the year (in shares) | shares	224,001
Weighted Avg. Exercise Price (in dollars per share)	$ 28.20
Weighted Avg. Remaining Contractual Life	5 years 4 months 24 days
Total Intrinsic Value | $	$ 1,640
$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	115,137
Weighted Avg. Exercise Price (in dollars per share)	$ 26.76
Weighted Avg. Remaining Contractual Life	7 years 2 months 12 days
Total Intrinsic Value | $	$ 1,001
$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	100,050
Weighted Avg. Exercise Price (in dollars per share)	$ 29.14
Weighted Avg. Remaining Contractual Life	3 years 3 months 18 days
Total Intrinsic Value | $	$ 631
$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	8,814
Weighted Avg. Exercise Price (in dollars per share)	$ 36.29
Weighted Avg. Remaining Contractual Life	6 years 4 months 24 days
Total Intrinsic Value | $	$ 8