DETAILS OF CERTAIN BALANCE SHEET ACCOUNTS - Accounts Receivable, net (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Mar. 31, 2019
Accounts receivable, net [Line Items]
Accounts receivable	$ 394,264	$ 393,415
Accounts receivable, net	337,077	337,671
Provision for promotions, rebates and other [Member]
Accounts receivable, net [Line Items]
Accounts receivable, reserves	(54,238)	(50,789)
Provisions for doubtful accounts and sales allowances [Member]
Accounts receivable, net [Line Items]
Accounts receivable, reserves	$ (2,949)	$ (4,956)