Leases - Supplemental Balance Sheet (Details) - USD ($) $ in Thousands	May 31, 2020	Feb. 29, 2020
Leases [Abstract]
Operating lease assets	$ 443,678	$ 449,094
Finance Lease, Right-of-Use Asset	75,412	75,320
Total lease assets	519,090	524,414
Current portion of operating lease liabilities	30,881	30,980
Finance Lease, Liability, Current	5,442	5,066
Operating lease liabilities, excluding current portion	435,325	440,671
Finance Lease, Liability, Noncurrent	82,974	79,327
Total lease liabilities	554,622	556,044
Finance Lease Accumulated Depreciation	$ 10,800	$ 9,100