Stockholders' Equity - Range Of Exercise Prices (Details) - 2009 Stock Option Plan $ / shares in Units, $ in Thousands	3 Months Ended
	Feb. 29, 2020 USD ($) $ / shares shares
2009 Stock Option Plan
Outstanding at ending of the year (in shares) | shares	189,822
Weighted Avg. Exercise Price (in dollars per share)	$ 28.23
Weighted Avg. Remaining Contractual Life	4 years 9 months 18 days
Total Intrinsic Value | $	$ 2,280
$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	112,638
Weighted Avg. Exercise Price (in dollars per share)	$ 26.76
Weighted Avg. Remaining Contractual Life	6 years
Total Intrinsic Value | $	$ 1,519
$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	65,212
Weighted Avg. Exercise Price (in dollars per share)	$ 29.21
Weighted Avg. Remaining Contractual Life	2 years 3 months 18 days
Total Intrinsic Value | $	$ 719
$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	11,972
Weighted Avg. Exercise Price (in dollars per share)	$ 36.74
Weighted Avg. Remaining Contractual Life	7 years 9 months 18 days
Total Intrinsic Value | $	$ 42