Balance Sheet Components - Components of Certain Balance Sheet Asset Amounts (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Mar. 31, 2021
Accounts receivable, net:
Accounts receivable	$ 1,034,726	$ 867,868
Accounts receivable, net	728,074	612,225
Inventories:
Raw materials	205,991	146,886
Finished goods	621,719	514,230
Inventory, net	827,710	661,116
Other current assets:
Value-added tax receivables	79,381	67,710
Prepaid expenses and other assets	87,350	67,940
Other current assets, total	166,731	135,650
Property, plant and equipment, net:
Property, plant and equipment at cost	454,417	417,520
Accumulated depreciation and amortization	(342,792)	(303,460)
Property, plant and equipment, net	111,625	114,060
Other assets:
Deferred tax assets	204,655	210,888
Right-of-use assets	41,234	31,169
Trading investments for deferred compensation plan	28,375	24,809
Investments in privately held companies	42,749	43,402
Other assets	14,857	13,980
Other assets, total	$ 331,870	324,248
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other assets, total
Allowance for doubtful accounts
Accounts receivable, net:
Valuation allowance for accounts receivable	$ (249)	(1,161)
Allowance for sales returns
Accounts receivable, net:
Valuation allowance for accounts receivable	(10,857)	(14,438)
Allowance for cooperative marketing arrangements
Accounts receivable, net:
Valuation allowance for accounts receivable	(64,216)	(43,276)
Allowance for customer incentive programs
Accounts receivable, net:
Valuation allowance for accounts receivable	(94,413)	(76,200)
Allowance for pricing programs
Accounts receivable, net:
Valuation allowance for accounts receivable	$ (136,917)	$ (120,568)