Leases - Lease Costs (Details) $ in Thousands	3 Months Ended	6 Months Ended
	May 31, 2020 USD ($)	May 31, 2020 USD ($)
Leases [Abstract]
Lease costs under long-term operating leases	$ 1,799	$ 3,757
Lease costs under short-term operating leases	99	144
Variable lease cost under short-term and long-term operating leases	82	188
Operating lease right-of-use asset impairment	266	1,189
Total operating lease cost	$ 2,246	5,278
Cash paid for leases		4,076
Right-of-use assets recognized for new leases and amendments (non-cash)		$ 231
Weighted average remaining lease term in years	4 years 8 months 1 day	4 years 8 months 1 day
Weighted average discount rate	2.30%	2.30%