Leases - Lease Costs (Details) $ in Thousands	3 Months Ended
	Feb. 29, 2020 USD ($)
Leases [Abstract]
Lease costs under long-term operating leases	$ 1,958
Lease costs under short-term operating leases	45
Variable lease cost under short-term and long-term operating leases	106
Operating lease right-of-use asset impairment	923
Total operating lease cost	3,032
Cash paid for leases	2,356
Right-of-use assets recognized for new leases and amendments (non-cash)	$ 0
Weighted average remaining lease term in years	4 years 9 months 21 days
Weighted average discount rate	2.40%