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Goodwill and Other Intangibles - Finite and Indefinite-Lived Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Finite-lived intangible assets      
Gross Carrying Amount $ 21,256 $ 22,045  
Accumulated Amortization (9,469) (8,007)  
Indefinite-lived intangible assets      
Goodwill 13,873 15,537 12,199
Patents [Member]
     
Finite-lived intangible assets      
Gross Carrying Amount 4,824 4,819  
Accumulated Amortization (4,434) (4,135)  
Land Use Rights [Member]
     
Finite-lived intangible assets      
Gross Carrying Amount 1,380 1,322  
Accumulated Amortization (153) (125)  
Trademark [Member]
     
Finite-lived intangible assets      
Gross Carrying Amount 1,590 1,674  
Accumulated Amortization (680) (529)  
Customer Backlog [Member]
     
Finite-lived intangible assets      
Gross Carrying Amount 578 578  
Accumulated Amortization (578) (578)  
Technology [Member]
     
Finite-lived intangible assets      
Gross Carrying Amount 2,751 2,924  
Accumulated Amortization (538) (361)  
Customer Relationships [Member]
     
Finite-lived intangible assets      
Gross Carrying Amount 10,133 10,728  
Accumulated Amortization $ (3,086) $ (2,279)