CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Current assets:
Cash and cash equivalents	$ 276,850	$ 232,704
Short-term investments	97,859us-gaap_ShortTermInvestments	102,717us-gaap_ShortTermInvestments
Accounts receivable, net	136,581us-gaap_AccountsReceivableNetCurrent	138,301us-gaap_AccountsReceivableNetCurrent
Inventory, net	56,676us-gaap_InventoryNet	57,132us-gaap_InventoryNet
Deferred tax assets	6,564us-gaap_DeferredTaxAssetsNetCurrent	11,776us-gaap_DeferredTaxAssetsNetCurrent
Other current assets	28,124us-gaap_OtherAssetsCurrent	13,657us-gaap_OtherAssetsCurrent
Total current assets	602,654us-gaap_AssetsCurrent	556,287us-gaap_AssetsCurrent
Long-term investments	107,590us-gaap_LongTermInvestments	100,342us-gaap_LongTermInvestments
Property, plant, and equipment, net	139,413us-gaap_PropertyPlantAndEquipmentNet	134,402us-gaap_PropertyPlantAndEquipmentNet
Goodwill and purchased intangibles, net	16,077	16,165
Other assets	10,308us-gaap_OtherAssetsNoncurrent	4,619us-gaap_OtherAssetsNoncurrent
Total assets	876,042us-gaap_Assets	811,815us-gaap_Assets
Current liabilities:
Accounts payable	32,781us-gaap_AccountsPayableCurrent	30,756us-gaap_AccountsPayableCurrent
Accrued liabilities	62,041us-gaap_AccruedLiabilitiesCurrent	66,851us-gaap_AccruedLiabilitiesCurrent
Total current liabilities	94,822us-gaap_LiabilitiesCurrent	97,607us-gaap_LiabilitiesCurrent
Long-term income taxes payable	12,984us-gaap_AccruedIncomeTaxesNoncurrent	12,719us-gaap_AccruedIncomeTaxesNoncurrent
Revolving line of credit	34,500us-gaap_LineOfCredit	0us-gaap_LineOfCredit
Other long-term liabilities	6,339us-gaap_OtherLiabilitiesNoncurrent	2,825us-gaap_OtherLiabilitiesNoncurrent
Total liabilities	148,645us-gaap_Liabilities	113,151us-gaap_Liabilities
Commitments and contingencies (Note 8)
Stockholders' equity:
Preferred stock, $0.01 par value per share; 1,000 shares authorized, no shares outstanding	0us-gaap_PreferredStockValueOutstanding	0us-gaap_PreferredStockValueOutstanding
Common stock, $0.01 par value per share; 100,000 shares authorized, 46,050 shares and 44,731 shares issued at 2015 and 2014, respectively	783us-gaap_CommonStockValue	770us-gaap_CommonStockValue
Additional paid-in capital	717,848	663,483
Accumulated other comprehensive income	10,120	2,638
Retained earnings	209,960	123,389
Total stockholders' equity before treasury stock	938,711	790,280
Less: Treasury stock (common: 4,449 shares and 2,082 shares at 2015 and 2014, respectively) at cost	(211,314)us-gaap_TreasuryStockValue	(91,616)us-gaap_TreasuryStockValue
Total stockholders' equity	727,397us-gaap_StockholdersEquity	698,664us-gaap_StockholdersEquity
Total liabilities and stockholders' equity	$ 876,042	$ 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.