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Acquisitions and Divestitures - Divestitures (Details) - USD ($)
$ in Thousands
3 Months Ended 7 Months Ended 8 Months Ended 9 Months Ended 12 Months Ended
Dec. 30, 2016
Oct. 10, 2016
Sep. 09, 2016
Jul. 29, 2016
Sep. 30, 2017
Dec. 31, 2016
Sep. 30, 2016
Jul. 29, 2016
Sep. 09, 2016
Sep. 30, 2017
Oct. 10, 2016
Sep. 30, 2016
Dec. 31, 2016
Dec. 30, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                            
Gain (loss) on sale of businesses - net         $ 0   $ (2,067)     $ 0   $ (2,067)    
Revenue         $ 574,490   530,356     1,701,408   $ 1,582,624    
Hydra-Stop Product Line | Disposed of by Sale                            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                            
Proceeds from sale of business       $ 15,000                    
Gain (loss) on sale of businesses - net             5,800              
Additional proceeds from sale of business       $ 2,000                    
Earnings for achievement                         $ 1,000  
Possible earnings for achievement                   $ 1,000        
Revenue               $ 7,500            
Melles Griot KK Subsidiary | Disposed of by Sale                            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                            
Proceeds from sale of business     $ 17,500                      
Gain (loss) on sale of businesses - net             $ (7,900)              
Revenue                 $ 13,100          
IETG and 40Seven Subsidiaries | Disposed of by Sale                            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                            
Proceeds from sale of business   $ 2,700                        
Gain (loss) on sale of businesses - net           $ (4,200)                
Revenue                     $ 8,300      
Korea Electro-Optics Co., Ltd. (CVI Korea) | Disposed of by Sale                            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                            
Proceeds from sale of business $ 3,800                          
Gain (loss) on sale of businesses - net           $ (16,000)                
Revenue                           $ 11,700