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Acquisition - Additional Information (Detail) (Aarding Thermal Acoustics [Member])
In Millions, except Share data, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2013
USD ($)
Jun. 30, 2013
USD ($)
Jun. 30, 2013
EUR (€)
Business Acquisition [Line Items]      
Cash paid on acquisition   $ 24.4  
Company's common stock   763,673 763,673
Fair value of common stock issued 7.4 7.4  
Business combination contingent consideration paid 5.2 5.2 4.0
Prepaid compensation recognized in Prepaid expenses and other current assets 1 1  
Prepaid compensation recognized in Deferred Charges and other assets 3.8 3.8  
Business combination compensation expenses 0.2 0.3  
Earn out payment upon attainment of gross profit   7.2 5.5
Earn out expenses 0.4 0.5  
Earn out expenses included in accounts payable and accrued expenses $ 0.5 $ 0.5