Commitments and Contingent Liabilities - (Future MInimum Payments Under Noncancellable Leases) (Details) - USD ($) $ in Thousands	Feb. 28, 2021	Nov. 30, 2020
Commitments and Contingencies Disclosure [Abstract]
2021	$ 27,789
2022	32,762
2023	26,681
2024	21,188
2025	17,425
2026 and thereafter	71,131
Total future minimum lease payments	196,976
Less: Interest	23,248
Present value of lease liabilities	173,728	$ 122,836
Variable lease costs	14,300
Short-term lease costs	$ 2,200
Weighted-average remaining lease term (in years)	2 years 6 months	2 years 7 months 6 days
Weighted-average discount rate	3.00%	3.10%