Leases (Lease Assets and Liabilities) (Details) $ in Thousands	Feb. 29, 2020 USD ($)
Assets
Operating lease assets	$ 373,413
Finance lease assets	151,401
Total lease assets	524,814
Current
Operating lease liabilities	100,033
Finance lease liabilities	6,906
Non-current
Operating lease liabilities	311,879
Finance lease liabilities	156,798
Total lease liabilities	575,616
Operating lease assets, accumulated amortization	49,200
Finance lease assets, accumulated amortization	$ 9,600