| 
           Acquisition - Additional Information (Detail) (USD $) 
        In Millions, unless otherwise specified  | 
        1 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
| 
           Jul. 30, 2012 
         | 
        
           May 28, 2013
 
          Peco, Inc. [Member] 
         | 
        
           Jul. 30, 2012
 
          Max-Viz, Inc. [Member] 
         | 
        
           Jun. 29, 2013
 
          Max-Viz, Inc. [Member] 
         | 
      |
| Loans At Acquisition Date [Line Items] | ||||
| Purchase consideration in cash | $ 136.0 | $ 10.7 | ||
| Percentage of acquired stock | 100.00% | 100.00% | ||
| Acquisition contingent consideration | 8.0 | |||
| Target period of growth | 3 years | 3 years | ||
| Revenue through acquisition | $ 5.4 | |||
| Goodwill and purchased intangible assets deductible for tax purposes period | 15 years | |||
| X | ||||||||||
| 
             
- Definition 
          Business acquisition goodwill and intangible assets expected tax deductible period. No definition available. 
  | 
        
| X | ||||||||||
| 
             
- Details 
          
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Period for meeting revenue growth targets as condition of contingent consideration. No definition available. 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Percentage of voting equity interests acquired at the acquisition date in the business combination. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Total revenue reported by the acquired entity for its previous full fiscal year before the business acquisition. No definition available. 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  |