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Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Revenue Recognition (Details) - USD ($) $ in Thousands	Aug. 31, 2018	Aug. 31, 2017	Aug. 31, 2018	Aug. 31, 2017	Feb. 28, 2018
Revenue Recognition
Receivables	$ 313,615		$ 313,615		$ 275,565
Sales revenue, net		$ 344,949		$ 670,440
Accrued expenses and other current liabilities	144,915		144,915		168,261
Selling, general and administrative expense (SG&A)	$ 103,654	103,770	$ 205,160	200,757
Restatement Adjustment \| ASU 2014-09
Revenue Recognition
Receivables					2,397
Sales revenue, net		(2,256)		(4,751)
Accrued expenses and other current liabilities					2,397
Selling, general and administrative expense (SG&A)		(2,256)		(4,751)
Scenario, Previously Reported
Revenue Recognition
Receivables					273,168
Sales revenue, net		347,205		675,191
Accrued expenses and other current liabilities					$ 165,864
Selling, general and administrative expense (SG&A)		$ 106,026		$ 205,508