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Acquisitions - Additional Information (Detail)
 6 Months Ended 1 Months Ended 6 Months Ended 1 Months Ended 1 Months Ended
Jun. 30, 2013
USD ($)
Dec. 31, 2012
USD ($)
Mar. 31, 2013
FTL Seals Technology, Ltd
USD ($)
Mar. 31, 2013
FTL Seals Technology, Ltd
GBP (£)
Jun. 30, 2013
FTL Seals Technology, Ltd
USD ($)
Jun. 30, 2013
FTL Seals Technology, Ltd
GBP (£)
Mar. 18, 2013
FTL Seals Technology, Ltd
USD ($)
Apr. 30, 2012
Precision Photonics Corporation
USD ($)
Apr. 11, 2012
Precision Photonics Corporation
USD ($)
Apr. 30, 2012
ERC
USD ($)
Apr. 30, 2012
ERC
JPY (¥)
Apr. 30, 2013
Matcon Group Limited
USD ($)
Jul. 31, 2012
Matcon Group Limited
USD ($)
Jul. 31, 2012
Matcon Group Limited
GBP (£)
Jun. 30, 2013
Matcon Group Limited
USD ($)
Jul. 20, 2012
Matcon Group Limited
USD ($)
Business Acquisition [Line Items]                                
Annual revenue of entity acquired         $ 22,500,000 £ 15,000,000                    
Aggregate purchase price     34,500,000 23,100,000       20,600,000   18,000,000 1,470,000,000   45,800,000 29,100,000    
Business acquisition, amount financed with borrowings under the revolving facility     34,500,000             13,300,000           15,000,000
Goodwill 1,329,797,000 1,321,727,000         17,994,000   13,900,000 8,500,000           28,000,000
Intangible assets recognized in acquisition             13,000,000   5,100,000 5,600,000           14,100,000
Goodwill not deductible for tax purpose             17,994,000   13,900,000 8,500,000           28,000,000
Acquisition-related transaction costs 1,400,000                              
Non-cash acquisition fair value inventory charges 1,800,000                              
Acquisition cash payment made for funded from operation                 20,600,000              
Business acquisition, cash consideration paid                   13,300,000     35,000,000      
Business acquisition, assumption of debt             5,939,000     4,700,000            
Business acquisition, working capital adjustments                         2,400,000      
Contingent consideration fair value 4,890,000 9,043,000                         4,900,000 8,400,000
Payment under contingent consideration arrangement                       3,800,000        
Business acquisition, minimum potential undiscounted amount of all future payments                               0
Business acquisition, maximum potential undiscounted amount of all future payments                               $ 4,900,000