XML 48 R61.htm IDEA: XBRL DOCUMENT v2.4.0.8
Goodwill - Changes in Carrying Value of Goodwill (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2013
Goodwill [Line Items]    
Goodwill, Beginning Balance $ 82,029 $ 81,689
Foreign currency exchange rate changes (340)  
Goodwill, Ending Balance 81,689 81,689
MVSD [Member]
    
Goodwill [Line Items]    
Goodwill, Beginning Balance 77,556 77,388
Foreign currency exchange rate changes (168)  
Goodwill, Ending Balance 77,388 77,388
SISD [Member]
    
Goodwill [Line Items]    
Goodwill, Beginning Balance 4,473 4,301
Foreign currency exchange rate changes (172)  
Goodwill, Ending Balance $ 4,301 $ 4,301