Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

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Income Taxes - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Income Tax Contingency [Line Items]      
Penalties or interest liabilities accrued $ 0 $ 0  
Penalties or interest expense 0 0 0
Pretax income 0.2 1.0 0.9
Foreign taxes on undistributed earnings of foreign subsidiaries 3.8    
Foreign tax credit 1.5    
State and foreign tax credit carryforwards expiration beginning year 2015    
State and foreign tax credit carryforwards expiration ending year 2028    
Operating loss carryforwards, expiration dates These state net operating loss carryforwards amount to approximately $17.8 million and expire at various dates from 2027 through 2033    
Deferred tax assets 4.8    
Operating loss carryforwards expiration beginning year 2027    
Operating loss carryforwards expiration ending year 2033    
Tax benefits related to stock option exercises 1.3 1.2  
Estimated Benefits for research and development tax credits   0  
Tax benefits   0.7  
Tax benefits Reserve   0.7  
Amount recognized in tax credit   1.1  
State and Local Jurisdiction [Member]
      
Income Tax Contingency [Line Items]      
Net operating loss carryforwards $ 17.8    
Minimum [Member] | Federal Jurisdiction [Member]
      
Income Tax Contingency [Line Items]      
Year for tax examination 2011    
Minimum [Member] | State and Local Jurisdiction [Member]
      
Income Tax Contingency [Line Items]      
Year for tax examination 2010    
Maximum [Member] | Federal Jurisdiction [Member]
      
Income Tax Contingency [Line Items]      
Year for tax examination 2013    
Maximum [Member] | State and Local Jurisdiction [Member]
      
Income Tax Contingency [Line Items]      
Year for tax examination 2013