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Acquisitions (Narrative) (Details)
 12 Months Ended 0 Months Ended 0 Months Ended 0 Months Ended 0 Months Ended
Dec. 31, 2011
USD ($)
Dec. 31, 2010
USD ($)
years
Dec. 31, 2011
Advanced Thin Films, LLC [Member]
USD ($)
Jan. 31, 2011
Advanced Thin Films, LLC [Member]
USD ($)
Mar. 11, 2011
Microfluidics International Corporation [Member]
USD ($)
Dec. 31, 2011
Microfluidics International Corporation [Member]
USD ($)
Jun. 10, 2011
CVI Melles Griot [Member]
USD ($)
Dec. 31, 2011
CVI Melles Griot [Member]
USD ($)
Apr. 15, 2010
PPE [Member]
USD ($)
Apr. 15, 2010
PPE [Member]
GBP (£)
Jul. 21, 2010
OBL [Member]
USD ($)
Jul. 21, 2010
OBL [Member]
EUR (€)
Sep. 17, 2010
Periflo [Member]
USD ($)
Nov. 01, 2010
Fitzpatrick [Member]
USD ($)
Dec. 31, 2011
Trade Names [Member]
CVI Melles Griot [Member]
USD ($)
Dec. 31, 2011
Other Intangible Assets [Member]
USD ($)
Jan. 31, 2011
Maximum [Member]
USD ($)
Jan. 31, 2011
Maximum [Member]
Advanced Thin Films, LLC [Member]
USD ($)
Business Acquisition [Line Items]                                    
Annual revenues of acquired entity         $ 16,000,000   $ 178,000,000   $ 32,000,000 £ 21,000,000 $ 10,900,000 € 8,500,000 $ 3,500,000 $ 22,000,000     $ 9,000,000  
Aggregate purchase price         18,500,000   394,700,000   54,000,000                 34,500,000
Purchase price paid in cash             393,300,000   51,300,000   15,400,000   4,300,000 20,300,000       31,800,000
Contingent consideration                                 3,000,000 2,700,000
Assumption of debt             1,400,000   2,700,000                  
Cash payment financed with borrowings under Company's revolving credit facility             365,000,000                      
Goodwill recognized in acquisition 231,189,000 45,915,000 18,187,000     5,740,000   207,262,000 29,700,000   7,700,000   2,500,000 6,000,000        
Intangible assets 136,929,000 29,861,000 11,435,000     9,717,000   115,777,000 17,200,000   4,000,000   700,000 8,000,000 47,000,000 89,900,000    
Goodwill deductible for tax purpose       18,200,000     117,700,000           2,500,000          
Goodwill not deductible for tax purposes         5,700,000       29,700,000   7,700,000     6,000,000        
Acquired intangible assets amortization life, minimum   2                                
Acquired intangible assets amortization life, maximum   15                                
Acquisition related transaction costs 5,800,000 4,000,000                                
Pre-tax acquisition fair value inventory charges and adjustments $ 24,100,000 $ 16,400,000