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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Cash flows from operating activities:      
Consolidated net income $ 78.2 $ 94.0 $ 96.8
Adjustments to reconcile consolidated net income to cash flows from operating activities:      
Depreciation and amortization 59.1 52.9 36.1
Write down of demonstration inventories to net realizable value 31.5 30.0 24.4
Impairment of assets 23.8    
Stock-based compensation expense 7.8 7.9 6.9
Deferred income taxes (11.7) (4.8) (3.6)
Gain on disposal of product line (2.2)    
Other non-cash expenses, net 4.9 1.2 1.9
Changes in operating assets and liabilities, net of acquisitions:      
Accounts receivable 1.6 (52.8) (27.3)
Inventories (49.5) (103.3) (68.0)
Accounts payable and accrued expenses 4.6 23.4 29.6
Income taxes payable (2.4) (0.8) 20.6
Deferred revenue (4.4) 17.4 15.5
Customer advances (4.6) 31.3 27.9
Other changes in operating assets and liabilities, net (3.6) (8.7) (4.7)
Net cash provided by operating activities 133.1 87.7 156.1
Cash flows from investing activities:      
Cash paid for acquisitions, net of cash acquired (27.0) (14.3) (269.8)
Disposal of product line 3.3    
Purchases of property, plant and equipment (72.8) (61.6) (31.9)
Sales of property, plant and equipment 3.3 7.2 2.7
Net cash used in investing activities (93.2) (68.7) (299.0)
Cash flows from financing activities:      
Repayments of revolving lines of credit (216.5)    
Proceeds of revolving lines of credit 93.0 30.7 185.0
Proceeds from Note Purchase Agreement 240.0    
Repayment of other debt, net (83.2) (29.3) (21.6)
Payment of deferred financing costs (1.4) (1.3)  
Proceeds from issuance of common stock, net 4.5 3.3 6.0
Excess tax benefit related to exercise of stock awards   0.2 0.3
Changes in restricted cash (1.4) 0.1 (1.3)
Cash payments to noncontrolling interests (0.6) (0.4) (0.1)
Net cash provided by financing activities 34.4 3.3 168.3
Effect of exchange rate changes on cash and cash equivalents (9.7) (6.7) (2.1)
Net change in cash and cash equivalents 64.6 15.6 23.3
Cash and cash equivalents at beginning of year 246.0 230.4 207.1
Cash and cash equivalents at end of year 310.6 246.0 230.4
Supplemental disclosure of cash flow information:      
Cash paid for interest 10.1 6.7 4.5
Cash paid for taxes 79.9 69.7 38.7
Non-cash financing activities:      
Issuance of common stock in connection with acquisition of Michrom Bioresources Inc.   $ 2.9