CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Mar. 31, 2014
Current assets:
Cash and cash equivalents	$ 280,350	$ 232,704
Short-term investments	90,647us-gaap_ShortTermInvestments	102,717us-gaap_ShortTermInvestments
Accounts receivable, net	157,322us-gaap_AccountsReceivableNetCurrent	138,301us-gaap_AccountsReceivableNetCurrent
Inventory, net	57,724us-gaap_InventoryNet	57,132us-gaap_InventoryNet
Deferred tax assets	11,349us-gaap_DeferredTaxAssetsNetCurrent	11,776us-gaap_DeferredTaxAssetsNetCurrent
Other current assets	25,597us-gaap_OtherAssetsCurrent	13,657us-gaap_OtherAssetsCurrent
Total current assets	622,989us-gaap_AssetsCurrent	556,287us-gaap_AssetsCurrent
Long-term investments	112,796us-gaap_LongTermInvestments	100,342us-gaap_LongTermInvestments
Property, plant, and equipment, net	139,292us-gaap_PropertyPlantAndEquipmentNet	134,402us-gaap_PropertyPlantAndEquipmentNet
Goodwill and purchased intangibles, net	16,140	16,165
Other assets	3,173us-gaap_OtherAssetsNoncurrent	4,619us-gaap_OtherAssetsNoncurrent
Total assets	894,390us-gaap_Assets	811,815us-gaap_Assets
Current liabilities:
Accounts payable	33,151us-gaap_AccountsPayableCurrent	30,756us-gaap_AccountsPayableCurrent
Accrued liabilities	65,598us-gaap_AccruedLiabilitiesCurrent	66,851us-gaap_AccruedLiabilitiesCurrent
Total current liabilities	98,749us-gaap_LiabilitiesCurrent	97,607us-gaap_LiabilitiesCurrent
Long-term income taxes payable	13,814us-gaap_AccruedIncomeTaxesNoncurrent	12,719us-gaap_AccruedIncomeTaxesNoncurrent
Other long-term liabilities	5,662us-gaap_OtherLiabilitiesNoncurrent	2,825us-gaap_OtherLiabilitiesNoncurrent
Total liabilities	118,225us-gaap_Liabilities	113,151us-gaap_Liabilities
Commitments and contingencies (Note 5)
Stockholders' equity:
Common stock	782us-gaap_CommonStockValue	770us-gaap_CommonStockValue
Additional paid-in capital	704,403	663,483
Accumulated other comprehensive income	5,924	2,638
Retained earnings	190,569	123,389
Total stockholders' equity before treasury stock	901,678	790,280
Less: Treasury stock, at cost	(125,513)us-gaap_TreasuryStockValue	(91,616)us-gaap_TreasuryStockValue
Total stockholders' equity	776,165us-gaap_StockholdersEquity	698,664us-gaap_StockholdersEquity
Total liabilities and stockholders' equity	$ 894,390	$ 811,815

Sum of the carrying amounts (original costs for current and prior period additions adjusted for impairment, if any, less accumulated amortization on finite-lived intangibles) as of the balance sheet date of goodwill and finite-lived purchased intangible assets.

No definition available.