Significant Accounting Policies	9 Months Ended
Sep. 30, 2011
Significant Accounting Policies [Abstract]
Significant Accounting Policies	Significant Accounting Policies Radisys Corporation (the “Company” or “Radisys”) has adhered to the accounting policies set forth in its Annual Report on Form 10-K for the year ended December 31, 2010 in preparing the accompanying interim consolidated financial statements. The preparation of these statements in conformity with U.S. generally accepted accounting principles (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenue and expenses, and related disclosure of contingent assets and liabilities. Actual results could differ from those estimates. Additionally, the accompanying financial data as of September 30, 2011 and for the three and nine months ended September 30, 2011 and 2010 has been prepared by the Company, without audit, pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been omitted pursuant to such rules and regulations. However, the Company believes that the disclosures are adequate to make the information presented not misleading. These consolidated financial statements should be read in conjunction with the consolidated financial statements and the notes thereto included in the Company's Annual Report on Form 10-K for the year ended December 31, 2010. The financial information included herein reflects all normal recurring adjustments that are, in the opinion of management, necessary for a fair presentation of the results for interim periods. Contingent Consideration Contingent consideration is recorded at the acquisition date estimated fair value of the contingent payment for all acquisitions. The fair value of the contingent consideration is remeasured each reporting period with any adjustments in fair value included in the Company’s Consolidated Statement of Income. Recent Accounting Pronouncements In May 2011, the Financial Accounting Standards Board ("FASB") issued Accounting Standard Update ("ASU") No. 2011-04, "Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and International Financial Reporting Standards," that amends some fair value measurement principles and disclosure requirements. This ASU states that the concepts of highest and best use and valuation premise are only relevant when measuring the fair value of nonfinancial assets and prohibits the grouping of financial instruments for purposes of determining their fair values when the unit of account is specified in other guidance. The provisions of this ASU will be applied prospectively for interim and annual periods beginning after December 15, 2011, with early adoption prohibited. The standard is not expected to have a material impact on the Company's financial position or results of operations. In June 2011, the FASB issued ASU No. 2011-05, “Comprehensive Income”. ASU 2011-05 requires that all non-owner changes in stockholders’ equity be presented either in a single continuous statement of comprehensive income or in two separate but consecutive statements, eliminating the option to present other comprehensive income in the statement of changes in stockholders' equity. The provisions of this ASU will be applied retrospectively for interim and annual periods beginning after December 15, 2011, with early application permitted. The standard is not expected to have a material impact on the Company's financial position or results of operations; however it will change the manner in which the Company presents comprehensive income. In September 2011, the FASB issued ASU No. 2011-08, “Intangibles-Goodwill and Other” that will allow an entity to first assess qualitative factors to determine whether it is necessary to perform the two-step quantitative goodwill impairment test. Under these amendments, an entity would not be required to calculate the fair value of a reporting unit unless the entity determines, based on a qualitative assessment, that it is more likely than not that its fair value is less than its carrying amount. The amendments include a number of events and circumstances for an entity to consider in conducting the qualitative assessment. The guidance is effective for fiscal years beginning after December 15, 2011 with early adoption permitted. The standard is not expected to have a material impact on the Company's financial position or results of operations; however it will change the manner in which we assess goodwill for impairment.

Significant Accounting Policies

Radisys Corporation (the “Company” or “Radisys”) has adhered to the accounting policies set forth in its Annual Report on Form 10-K for the year ended December 31, 2010 in preparing the accompanying interim consolidated financial statements. The preparation of these statements in conformity with U.S. generally accepted accounting principles (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenue and expenses, and related disclosure of contingent assets and liabilities. Actual results could differ from those estimates. Additionally, the accompanying financial data as of September 30, 2011 and for the three and nine months ended September 30, 2011 and 2010 has been prepared by the Company, without audit, pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been omitted pursuant to such rules and regulations. However, the Company believes that the disclosures are adequate to make the information presented not misleading. These consolidated financial statements should be read in conjunction with the consolidated financial statements and the notes thereto included in the Company's Annual Report on Form 10-K for the year ended December 31, 2010.

The financial information included herein reflects all normal recurring adjustments that are, in the opinion of management, necessary for a fair presentation of the results for interim periods.

Contingent Consideration

Contingent consideration is recorded at the acquisition date estimated fair value of the contingent payment for all acquisitions. The fair value of the contingent consideration is remeasured each reporting period with any adjustments in fair value included in the Company’s Consolidated Statement of Income.

Recent Accounting Pronouncements

In May 2011, the Financial Accounting Standards Board ("FASB") issued Accounting Standard Update ("ASU") No. 2011-04, "Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and International Financial Reporting Standards," that amends some fair value measurement principles and disclosure requirements. This ASU states that the concepts of highest and best use and valuation premise are only relevant when measuring the fair value of nonfinancial assets and prohibits the grouping of financial instruments for purposes of determining their fair values when the unit of account is specified in other guidance. The provisions of this ASU will be applied prospectively for interim and annual periods beginning after December 15, 2011, with early adoption prohibited. The standard is not expected to have a material impact on the Company's financial position or results of operations.

In June 2011, the FASB issued ASU No. 2011-05, “Comprehensive Income”. ASU 2011-05 requires that all non-owner changes in stockholders’ equity be presented either in a single continuous statement of comprehensive income or in two separate but consecutive statements, eliminating the option to present other comprehensive income in the statement of changes in stockholders' equity. The provisions of this ASU will be applied retrospectively for interim and annual periods beginning after December 15, 2011, with early application permitted. The standard is not expected to have a material impact on the Company's financial position or results of operations; however it will change the manner in which the Company presents comprehensive income.

In September 2011, the FASB issued ASU No. 2011-08, “Intangibles-Goodwill and Other” that will allow an entity to first assess qualitative factors to determine whether it is necessary to perform the two-step quantitative goodwill impairment test. Under these amendments, an entity would not be required to calculate the fair value of a reporting unit unless the entity determines, based on a qualitative assessment, that it is more likely than not that its fair value is less than its carrying amount. The amendments include a number of events and circumstances for an entity to consider in conducting the qualitative assessment. The guidance is effective for fiscal years beginning after December 15, 2011 with early adoption permitted. The standard is not expected to have a material impact on the Company's financial position or results of operations; however it will change the manner in which we assess goodwill for impairment.