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Acquisitions Acquisitions - Purchase Price (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2012
Ipsogen [Member]
Dec. 31, 2012
Cellestis [Member]
Aug. 29, 2011
Cellestis [Member]
May 03, 2012
AmniSure [Member]
Dec. 31, 2012
Developed Technology, Licenses, and Know How [Member]
Ipsogen [Member]
Dec. 31, 2012
Developed Technology, Licenses, and Know How [Member]
Cellestis [Member]
May 03, 2012
Developed Technology, Licenses, and Know How [Member]
AmniSure [Member]
Dec. 31, 2012
Customer Relationships [Member]
Ipsogen [Member]
Dec. 31, 2012
Customer Relationships [Member]
Cellestis [Member]
May 03, 2012
Customer Relationships [Member]
AmniSure [Member]
Dec. 31, 2012
Trade Names [Member]
Ipsogen [Member]
Dec. 31, 2012
Trade Names [Member]
Cellestis [Member]
May 03, 2012
Trade Names [Member]
AmniSure [Member]
May 03, 2012
In Process Research and Development [Member]
AmniSure [Member]
Business Acquisition [Line Items]                                  
Cash consideration paid       $ 57,436 $ 372,452 $ 372,500 $ 101,415                    
Fair value of remaining shares       42,437                          
Fair value of contingent consideration 19,000           4,530                    
Purchase price       99,873 372,452   105,945                    
Working capital       15,284 18,465   5,297                    
Deferred tax asset of acquired NOLs       8,997                          
Fixed and other long-term assets       2,429 1,112   267                    
Intangible assets               44,500 67,500 28,941 11,000 48,800 25,520 1,400 12,000 2,692 4,522
Goodwill 1,759,898 1,733,722 1,352,281 37,500 258,886   44,369                    
Deferred tax liability on fair value of identifiable intangible assets acquired       (19,325) (34,079)   (5,202)                    
Long-term liabilities assumed       (1,912) (232)   (461)                    
Assets acquired, goodwill, and liabilities assumed, net       $ 99,873 $ 372,452   $ 105,945