Leases - Supplemental Balance Sheet (Details) - USD ($) $ in Thousands	Aug. 31, 2020	Feb. 29, 2020
Leases [Abstract]
Operating lease assets	$ 444,158	$ 449,094
Finance Lease, Right-of-Use Asset	84,545	75,320
Total lease assets	528,703	524,414
Current portion of operating lease liabilities	31,616	30,980
Finance Lease, Liability, Current	5,997	5,066
Operating lease liabilities, excluding current portion	435,113	440,671
Finance Lease, Liability, Noncurrent	92,201	79,327
Total lease liabilities	564,927	556,044
Finance Lease Accumulated Depreciation	$ 12,500	$ 9,100