1021 - Disclosure - Selected Quarterly Financial Data (Details) link:presentationLink link:calculationLink link:definitionLink 1020 - Disclosure - Industry Segment Geographic Information and Significant Customers (Details) link:presentationLink link:calculationLink link:definitionLink 1010 - Disclosure - Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 1006 - Disclosure - Property and Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 1004 - Disclosure - Fair Value Measurements (Details) link:presentationLink link:calculationLink link:definitionLink 1002 - Disclosure - Acquisitions (Details) link:presentationLink link:calculationLink link:definitionLink 1001 - Disclosure - Significant Accounting Policies (Details) link:presentationLink link:calculationLink link:definitionLink 0921 - Disclosure - Selected Quarterly Financial Data (Tables) link:presentationLink link:calculationLink link:definitionLink 0920 - Disclosure - Industry Segment Geographic Information and Significant Customers (Tables) link:presentationLink link:calculationLink link:definitionLink 0917 - Disclosure - Commitments and Contingencies (Tables) link:presentationLink link:calculationLink link:definitionLink 0910 - Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 0906 - Disclosure - Property and Equipment (Table) link:presentationLink link:calculationLink link:definitionLink 0904 - Disclosure - Fair Value Measurements (Tables) link:presentationLink link:calculationLink link:definitionLink 0902 - Disclosure - Acquisitions (Tables) link:presentationLink link:calculationLink link:definitionLink 0901 - Disclosure - Significant Accounting Policies (Tables) link:presentationLink link:calculationLink link:definitionLink 0621 - Disclosure - Selected Quarterly Financial Data (unaudited) link:presentationLink link:calculationLink link:definitionLink 0620 - Disclosure - Industry Segment Geographic Information and Significant Customers link:presentationLink link:calculationLink link:definitionLink 0610 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 0606 - Disclosure - Property and Equipment link:presentationLink link:calculationLink link:definitionLink 0605 - Disclosure - Financial Instruments link:presentationLink link:calculationLink link:definitionLink 0604 - Disclosure - Fair Value Measurements link:presentationLink link:calculationLink link:definitionLink 03 - Statement - Consolidated Statements of Equity and Comprehensive Income link:presentationLink link:calculationLink link:definitionLink 1015 - Disclosure - Comprehensive Income (Details) link:presentationLink link:calculationLink link:definitionLink 0915 - Disclosure - Comprehensive Income (Tables) link:presentationLink link:calculationLink link:definitionLink 0615 - Disclosure - Comprehensive Income link:presentationLink link:calculationLink link:definitionLink 1018 - Disclosure - Credit Agreement (Details) link:presentationLink link:calculationLink link:definitionLink 0801 - Disclosure - Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 1014 - Disclosure - Equity (Details) link:presentationLink link:calculationLink link:definitionLink 1017 - Disclosure - Commitments and Contingencies (Details) link:presentationLink link:calculationLink link:definitionLink 1012 - Disclosure - Benefit Plans (Details) link:presentationLink link:calculationLink link:definitionLink 1019 - Disclosure - Non Operating Income (Expense) (Details) link:presentationLink link:calculationLink link:definitionLink 0919 - Disclosure - Non Operating Income (Expense) (Table) link:presentationLink link:calculationLink link:definitionLink 1016 - Disclosure - Net Income Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 0916 - Disclosure - Net Income Per Share (Tables) link:presentationLink link:calculationLink link:definitionLink 1011 - Disclosure - Restructuring (Details) link:presentationLink link:calculationLink link:definitionLink 0911 - Disclosure - Restructuring (Tables) link:presentationLink link:calculationLink link:definitionLink 1013 - Disclosure - Stock Based Compensation (Details) link:presentationLink link:calculationLink link:definitionLink 0913 - Disclosure - Stock Based Compensation (Tables) link:presentationLink link:calculationLink link:definitionLink 1009 - Disclosure - Accrued Expenses (Details) link:presentationLink link:calculationLink link:definitionLink 0909 - Disclosure - Accrued Expenses (Table) link:presentationLink link:calculationLink link:definitionLink 1008 - Disclosure - Other Assets (Details) link:presentationLink link:calculationLink link:definitionLink 0908 - Disclosure - Other Assets (Table) link:presentationLink link:calculationLink link:definitionLink 1007 - Disclosure - Goodwill and Purchased and Other Intangibles (Details) link:presentationLink link:calculationLink link:definitionLink 0907 - Disclosure - Goodwill and Purchased and Other Intangibles (Tables) link:presentationLink link:calculationLink link:definitionLink 1005 - Disclosure - Financial Instruments (Details) link:presentationLink link:calculationLink link:definitionLink 0905 - Disclosure - Financial Instruments (Tables) link:presentationLink link:calculationLink link:definitionLink 1003 - Disclosure - Cash, Cash Equivalents and Short-term Investments (Details) link:presentationLink link:calculationLink link:definitionLink 0903 - Disclosure - Cash, Cash Equivalents and Short Term Investments (Table) link:presentationLink link:calculationLink link:definitionLink 0602 - Disclosure - Acquisitions link:presentationLink link:calculationLink link:definitionLink 0603 - Disclosure - Cash, Cash Equivalents and Short Term Investments link:presentationLink link:calculationLink link:definitionLink 011 - Statement - Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 04 - Statement - Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 01 - Statement - Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 02 - Statement - Consolidated Statements of Income link:presentationLink link:calculationLink link:definitionLink 0613 - Disclosure - Stock Based Compensation link:presentationLink link:calculationLink link:definitionLink 0614 - Disclosure - Stockholders Equity link:presentationLink link:calculationLink link:definitionLink 0619 - Disclosure - Non Operating Income (Expense) link:presentationLink link:calculationLink link:definitionLink 0618 - Disclosure - Credit Agreement link:presentationLink link:calculationLink link:definitionLink 0617 - Disclosure - Commitments and Contingencies link:presentationLink link:calculationLink link:definitionLink 0616 - Disclosure - Net Income Per Share link:presentationLink link:calculationLink link:definitionLink 0611 - Disclosure - Restructuring link:presentationLink link:calculationLink link:definitionLink 0612 - Disclosure - Benefit Plan link:presentationLink link:calculationLink link:definitionLink 0609 - Disclosure - Accrued Expenses link:presentationLink link:calculationLink link:definitionLink 0608 - Disclosure - Other Assets link:presentationLink link:calculationLink link:definitionLink 0607 - Disclosure - Goodwill and Purchased and Other Intangibles link:presentationLink link:calculationLink link:definitionLink 0601 - Disclosure - Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 00 - Document - Document and Company Information link:presentationLink link:calculationLink link:definitionLink