Leases - Supplemental cash flow information related to leases (Details) $ in Thousands	9 Months Ended
	Nov. 30, 2019 USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows paid for operating leases	$ 469,207
Operating cash flows paid for interest portion of finance leases	2,536
Financing cash flows paid for principal portion of finance leases	4,939
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	265,612
Finance leases	$ 0