Stockholders' Equity - Range Of Exercise Prices (Details) - 2009 Stock Option Plan $ / shares in Units, $ in Thousands	3 Months Ended
	Feb. 28, 2019 USD ($) $ / shares shares
2009 Stock Option Plan
Outstanding at ending of the year (in shares) | shares	222,252
Weighted Avg. Exercise Price (in dollars per share)	$ 28.15
Weighted Avg. Remaining Contractual Life	5 years 2 months 12 days
Total Intrinsic Value | $	$ 1,332
$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
Total Intrinsic Value | $	$ 838
$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 1 month 6 days
Total Intrinsic Value | $	$ 490
$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	7,065
Weighted Avg. Exercise Price (in dollars per share)	$ 36.78
Weighted Avg. Remaining Contractual Life	7 years 8 months 12 days
Total Intrinsic Value | $	$ 4