Document And Entity Information [Abstract] Document And Entity Information [Abstract] Statement [Table] Statement [Line Items] Document Type Amendment Flag Document Period End Date Document Fiscal Year Focus Document Fiscal Period Focus Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Entity Filer Category Entity Common Stock, Shares Outstanding Condensed Consolidated Balance Sheets [Abstract] Assets Abstract ASSETS Cash and cash equivalents Cash and cash equivalents, at end of period Cash and cash equivalents, at beginning of period Cash and cash equivalents Short-term investments Short-term investments Accounts receivable, net Accounts receivable, net Inventory Net Inventories Inventories Deferred Tax Liabilities Current Deferred Tax Assets, Net, Current, Ending Balance Deferred Tax Assets, Net, Current, Beginning Balance Deferred income taxes Deferred Tax Assets, Net, Current, Total Prepaid Expense and Other Assets, Current Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current, Total Assets, Current Total current assets Property and equipment, net Property, Plant and Equipment, Net, Ending Balance Property, Plant and Equipment, Net, Beginning Balance Property and equipment, net Intangibles, net Intangibles, net Goodwill Goodwill, Ending Balance Goodwill, Beginning Balance Goodwill, Total Other non-current assets Other Assets, Noncurrent, Total Assets Total assets LIABILITIES AND STOCKHOLDERS' EQUITY. LIABILITIES AND STOCKHOLDERS' EQUITY Accounts payable Accounts Payable, Current, Total Accrued employee compensation Employee-related Liabilities, Current, Total Accrued Liabilities Current Other accrued liabilities Accrued Liabilities, Current, Total Deferred revenue Deferred Revenue, Current, Total Income taxes payable Liabilities, Current Total current liabilities Non-current income taxes payable Other non-current liabilities Other Liabilities, Noncurrent, Total Liabilities Total liabilities Commitments and contingencies (Note 13) Stockholders' equity: Common stock Common Stock, Value, Issued, Ending Balance Common Stock, Value, Issued, Beginning Balance Common Stock, Value, Issued, Total Additional paid-in capital Additional Paid in Capital, Ending Balance Additional Paid in Capital, Beginning Balance Additional paid-in capital Cumulative other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance Cumulative other comprehensive income Retained earnings Retained Earnings (Accumulated Deficit), Ending Balance Retained Earnings (Accumulated Deficit), Beginning Balance Retained earnings Stockholders' Equity Attributable to Parent Stockholders' Equity Attributable to Parent, Ending Balance Stockholders' Equity Attributable to Parent, Beginning Balance Total stockholders' equity Liabilities and Stockholders' Equity Total liabilities and stockholders' equity Condensed Consolidated Statements Of Operations [Abstract] Net revenue Net revenue Cost Of Goods And Services Sold Cost of revenue Cost of revenue Gross Profit Gross profit Operating expenses: Research And Development Expense Research and development Research and Development Expense, Total Sales and marketing Sales and marketing General and administrative General and administrative Restructuring and other Charges Restructuring and other Charges. Restructuring and other charges Litigation reserves, net Litigation reserves, net Gain (Loss) Related to Litigation Settlement, Total Operating Expenses Total operating expenses Operating Income (Loss) Income from operations Interest income Other income (expense), net Other income (expense), net Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Cumulative Effects of Changes in Accounting Principles, Noncontrolling Interest Income before income taxes Provision for income taxes Provision for income taxes Net income Net income Net Income Per Share [Abstract] Net income per share: Earnings Per Share Basic Basic Basic Earnings Per Share Diluted Diluted Diluted Weighted average shares outstanding used to compute net income per share: Basic Weighted Average Number of Shares Outstanding, Basic, Total Diluted Weighted Average Number of Shares Outstanding, Diluted, Total Condensed Consolidated Statements Of Cash Flows [Abstract] Cash and Cash Equivalents, Period Increase (Decrease) [Abstract] Cash flows from operating activities: Adjustments to reconcile net income to net cash provided by operating activities: Depreciation and amortization Depreciation and amortization Purchase premium amortization on investments Purchase premium amortization on investments Non-cash stock-based compensation Non-cash stock-based compensation Income tax benefit (detriment) associated with stock option exercises Income tax benefit associated with stock option exercises Excess tax benefit from stock-based compensation Excess tax benefit from stock-based compensation Deferred Income Tax Expense Benefit Deferred income taxes Deferred Income Tax Expense (Benefit), Total Changes in assets and liabilities, net of effect of acquisitions: Accounts receivable Accounts receivable Inventories Inventories Inventories Prepaid expenses and other assets Prepaid expenses and other assets Prepaid expenses and other assets Increase Decrease In Accounts Payable Accounts payable Accounts payable Increase Decrease In Employee Related Liabilities Accrued employee compensation Accrued employee compensation Other accrued liabilities Increase Decrease In Deferred Revenue Deferred revenue Increase Decrease In Accrued Income Taxes Payable Income taxes payable Net Cash Provided by (Used in) Operating Activities Net cash provided by operating activities Cash flows from investing activities: Payments To Acquire Short Term Investments Purchases of short-term investments Purchases of short-term investments Proceeds from sale of short-term investments Purchase of property and equipment Purchase of property and equipment Purchase of property and equipment Payments for (Proceeds from) Loans and Leases Loan issued Payments for (Proceeds from) Loans and Leases, Total Payments for patents Payments for patents Payments made in connection with business acquisitions Payments made in connection with business acquisitions Payments made in connection with business acquisitions Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Cash flows from financing activities: Purchase and retirement of treasury stock Purchase and retirement of treasury stock Proceeds from exercise of stock options Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options Proceeds from issuance of common stock under employee stock purchase plan Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options, Total Excess Tax Benefit From Share Based Compensation Financing Activities Excess tax benefit from stock-based compensation Net Cash Provided by (Used in) Financing Activities Net cash provided by financing activities Cash and Cash Equivalents, Period Increase (Decrease) Net increase (decrease) in cash and cash equivalents The Company And Summary Of Significant Accounting Policies [Abstract] Significant Accounting Policies [Text Block] The Company And Summary Of Significant Accounting Policies Recent Accounting Pronouncements [Abstract] Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Text Block] Recent Accounting Pronouncements Business Acquisitions [Abstract] Business Combination Disclosure [Text Block] Business Acquisitions Stock-Based Compensation [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Stock-Based Compensation Product Warranties [Abstract] Product Warranty Disclosure [Text Block] Product Warranties Shipping And Handling Fees And Costs [Abstract] Shipping And Handling Fees And Costs [Abstract] Shipping And Handling Fees And Costs [Text Block] Shipping and Handling Fees and Costs [Text Block] Shipping And Handling Fees And Costs Restructuring And Other Charges [Abstract] Restructuring and Related Activities Disclosure [Text Block] Restructuring Restructuring And Other Charges Derivative Financial Instruments [Abstract] Schedule of Derivative Instruments [Text Block] Derivative Financial Instruments Balance Sheet Components [Abstract] Balance Sheet Components [Text Block] Balance Sheet Components [Text Block] Balance Sheet Components Earnings Per Share [Text Block] Net Income Per Share Income Taxes [Abstract] Income Tax Disclosure [Text Block] Income Taxes Segment Information, Operations By Geographic Area And Significant Customers [Abstract] Segment Reporting Disclosure [Text Block] Segment Information, Operations By Geographic Area And Significant Customers Commitments And Contingencies [Abstract] Commitments and Contingencies Disclosure [Text Block] Commitments And Contingencies Fair Value Of Financial Instruments [Abstract] Fair Value Disclosures [Text Block] Fair Value Of Financial Instruments Comprehensive Income And Cumulative Other Comprehensive Income, Net [Abstract] Comprehensive Income Note Text Block Comprehensive Income And Cumulative Other Comprehensive Income, Net