DEI Document	9 Months Ended
	Sep. 30, 2013	Nov. 05, 2013	Dec. 31, 2012
DEI [Abstract]
Common Stock, Shares, Issued			28,471,000
Entity Registrant Name	Radisys Corporation
Entity Central Index Key	0000873044
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		29,097,024
Common Stock, Shares, Outstanding			28,471,000