LEASES - Balance Sheet Components (Details) $ in Thousands	May 31, 2020 USD ($)
Assets:
Operating assets	$ 120,931
Finance assets	43,477
Total leased assets	164,408
Operating lease liabilities:
Current	28,291
Long-term	98,903
Total operating lease liabilities	127,194
Finance lease liabilities:
Current	12,668
Long-term	30,837
Total finance lease liabilities	43,505
Total lease liabilities	$ 170,699