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CONSOLIDATED SUPPLEMENTARY FINANCIAL DATA Narrative (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended			12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly Financial Data [Abstract]
Impairment of goodwill and long-lived assets	$ 9,700rmbs_ImpairmentOfGoodwillAndLongLivedAssets	$ 8,100rmbs_ImpairmentOfGoodwillAndLongLivedAssets		$ 0rmbs_ImpairmentOfGoodwillAndLongLivedAssets	$ 17,751rmbs_ImpairmentOfGoodwillAndLongLivedAssets	$ 35,471rmbs_ImpairmentOfGoodwillAndLongLivedAssets
Restructuring charges	$ 2,200us-gaap_RestructuringCharges	$ 1,100us-gaap_RestructuringCharges	$ 2,200us-gaap_RestructuringCharges	$ 39us-gaap_RestructuringCharges	$ 5,546us-gaap_RestructuringCharges	$ 7,301us-gaap_RestructuringCharges

X

- Definition

Impairment of Goodwill and Long Lived Assets

+ References

No definition available.

+ Details

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- Details

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X

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 420

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 420

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SAB TOPIC 5.P.4(b))

-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 420

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 5.P.3)

-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747



Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section P

-Subsection 3, 4

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