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2. Acquisitions (Details)
 0 Months Ended 3 Months Ended 1 Months Ended
Sep. 30, 2013
USD ($)
Dec. 31, 2012
USD ($)
Jan. 10, 2013
AbD Serotec [Member]
USD ($)
Sep. 30, 2013
AbD Serotec [Member]
USD ($)
Mar. 31, 2013
AbD Serotec [Member]
USD ($)
Feb. 28, 2013
CellSorter [Member]
USD ($)
Aug. 31, 2012
CellSorter [Member]
USD ($)
Jul. 30, 2012
Benelux [Member]
USD ($)
Jul. 30, 2012
Benelux [Member]
EUR (€)
Jan. 18, 2012
Portland [Member]
USD ($)
Aug. 31, 2012
Fair Value, Measurements, Recurring [Member]
Estimate of Fair Value, Fair Value Disclosure [Member]
CellSorter [Member]
USD ($)
Aug. 31, 2012
Development [Member]
CellSorter [Member]
USD ($)
Aug. 31, 2012
Sales milestone minimum payment [Member]
CellSorter [Member]
USD ($)
Business Acquisition [Line Items]                          
Cash Acquired from Acquisition         $ 7,300,000                
Finite-Lived Intangible Assets, Purchase Accounting Adjustments       1,700,000                  
Goodwill, Purchase Accounting Adjustments       (2,100,000)                  
bio_NetAssetPurchaseAccountingAdjustment       400,000                  
Business Combination, Consideration Transferred     62,200,000       49,600,000 5,600,000 4,600,000 12,500,000      
Goodwill 513,705,000 495,418,000 14,900,000       17,400,000 3,000,000   1,100,000      
Finite-lived Intangible Assets Acquired     44,000,000       32,100,000 4,900,000   5,100,000      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net     3,300,000       100,000 (2,300,000)   6,300,000      
Employment agreement                   2,000,000      
Business Acquisition, Cost of Acquired Entity, Cash Paid           5,000,000              
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability                     $ 44,600,000 $ 19,900,000 $ 24,700,000