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3. Fair Value Measurements 3. Contingent Consideration (Details) (USD $)
3 Months Ended 3 Months Ended
Mar. 31, 2014
Sales milestone minimum payment [Member]
CellSorter [Member]
Mar. 31, 2014
Sales milestone year 1 maximum payment percentage [Member]
CellSorter [Member]
Mar. 31, 2014
Sales milestone year 2 maximum payment percentage [Member]
CellSorter [Member]
Mar. 31, 2014
Sales milestone year 3 maximum payment percentage [Member]
CellSorter [Member]
Mar. 31, 2014
Credit Adjusted Discount Rates Lower [Member]
CellSorter [Member]
Mar. 31, 2014
Credit Adjusted Discount Rate Higher [Member]
CellSorter [Member]
Mar. 31, 2014
Market Price of Risk [Member]
CellSorter [Member]
Mar. 31, 2014
Projected Volatility of Growth Rate [Member]
CellSorter [Member]
Mar. 31, 2014
Projected Volatility of Growth Rate Higher [Member]
CellSorter [Member]
Mar. 31, 2014
Sales Milestone year 1 bookings [Member]
CellSorter [Member]
Mar. 31, 2014
Sales milestone year 2 bookings [Member]
CellSorter [Member]
Mar. 31, 2014
Sales milestone year 3 bookings [Member]
CellSorter [Member]
Mar. 31, 2014
Fair Value, Measurements, Recurring [Member]
Estimate of Fair Value, Fair Value Disclosure [Member]
Dec. 31, 2013
Fair Value, Measurements, Recurring [Member]
Estimate of Fair Value, Fair Value Disclosure [Member]
Mar. 31, 2014
Fair Value, Measurements, Recurring [Member]
Estimate of Fair Value, Fair Value Disclosure [Member]
CellSorter [Member]
Mar. 31, 2014
Fair Value, Measurements, Recurring [Member]
Fair Value, Inputs, Level 1 [Member]
Dec. 31, 2013
Fair Value, Measurements, Recurring [Member]
Fair Value, Inputs, Level 1 [Member]
Mar. 31, 2014
Fair Value, Measurements, Recurring [Member]
Fair Value, Inputs, Level 2 [Member]
Dec. 31, 2013
Fair Value, Measurements, Recurring [Member]
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                                      
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low $ 0                                    
(Decrease) increase in fair value of contingent consideration included in SGA                             (4,900,000)        
Contingent Consideration at Fair Value                         15,900,000 [1] 20,800,000 [1] 15,900,000 0 [1] 0 [1] 0 [1] 0 [1]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High                   $ 20,000,000 $ 30,000,000 $ 45,000,000              
Business Acquisition, Contingent Consideration, Potential Percentage Payout   60.00% 51.32% 50.38%                              
Contingent Consideration Level 3 Inputs         .0067 .0145 .0125 .13 .20                    
[1] Contingent consideration liability is included in the following accounts in the Condensed Consolidated Balance Sheets (in millions): March 31, 2014 December 31, 2013Other current liabilities$3.0 $6.1Other long-term liabilities12.9 14.7 Total$15.9 $20.8