Balance Sheet Components- Components of Certain Balance Sheet Asset Amounts (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Mar. 31, 2015
Accounts receivable, net:
Accounts receivable	$ 436,724	$ 344,455
Allowance for doubtful accounts	(1,247)	(1,093)
Allowance for sales returns	(20,146)	(17,901)
Allowance for cooperative marketing arrangements	(39,127)	(25,700)
Allowance for customer incentive programs	(67,461)	(48,497)
Allowance for pricing programs	(87,163)	(71,441)
Accounts receivable, net	221,580	179,823
Inventories:
Raw materials	50,199	36,376
Finished goods	277,308	234,354
Inventory, net	327,507	270,730
Other current assets:
Income tax and value-added tax receivables	19,548	19,403
Deferred tax assets	36,601	27,790
Prepaid expenses and other assets	17,161	17,236
Other current assets, total	73,310	64,429
Property, plant and equipment, net:
Property, plant and equipment, gross	364,638	349,235
Less accumulated depreciation and amortization	(262,969)	(257,642)
Property, plant and equipment, net	101,669	91,593
Other assets:
Deferred tax assets	38,534	39,310
Trading investments for deferred compensation plan	17,350	17,237
Other assets	6,454	6,441
Other assets, total	$ 62,338	$ 62,988