Summary of Significant Accounting Policies - Schedule of Concentrations of Accounts Receivable (Details) (Americas geographic region [Member], Accounts Receivable [Member])	Dec. 31, 2011	Dec. 31, 2010
Acute and Extended Care Organizations [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	60.00%	56.00%
Managed Care, Insurance and Other [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	28.00%	32.00%
Medicare/Medicaid [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	10.00%	10.00%
Other [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	2.00%	2.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

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-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13537-108611

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

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-Section 50

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

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