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Leases - Lease Costs (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
May 31, 2021
May 31, 2020
May 31, 2021
May 31, 2020
Nov. 30, 2020
Leases [Abstract]          
Lease costs under long-term operating leases $ 2,009 $ 1,799 $ 4,144 $ 3,757  
Lease costs under short-term operating leases 4 99 19 144  
Variable lease cost under short-term and long-term operating leases 35 82 150 188  
Operating lease right-of-use asset impairment 36 266 36 1,189  
Total operating lease cost 2,084 2,246 4,349 5,278  
Cash paid for leases 2,209 1,720 4,467 4,076  
Right-of-use assets recognized for new leases and amendments (non-cash) $ 1,309 $ 231 $ 3,647 $ 231  
Weighted average remaining lease term in years 4 years 9 months 7 days   4 years 9 months 7 days   5 years 7 days
Weighted average discount rate 2.70%   2.70%   2.30%