Intangible Assets and Goodwill - Intangible Assets Narrative (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended		0 Months Ended	6 Months Ended
Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011	Dec. 31, 2011 Nine Technology LLC [Member]	Jun. 30, 2012 Nine Technology LLC [Member]	Dec. 20, 2011 Nine Technology LLC [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Accelerated amortized intangible assets carrying value	$ 1.3		$ 1.3
Intangible asset abandonment	1.3	0	1.3	0
Contingent consideration	6.4		6.4		9.2			1.0
Contingent consideration payments			$ 1.2	$ 0		$ (0.5)	$ (0.5)

This element represents the amount of any change, including any differences arising upon settlement, recognized during the reporting period in the value of a liability, arising from an item of contingent consideration, assumed in a business combination.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 50

-Paragraph 4

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e7008-128479

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 72

-Subparagraph b

-Clause 1

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration