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Goodwill and Other Intangible Assets - Summary of Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 40,206 $ 43,185
Accumulated Amortization 34,429 35,265
Total 5,777 7,920
Customer Relationships [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 33,927 33,759
Accumulated Amortization 28,552 26,644
Total 5,375 7,115
Research Content [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 4,699 7,043
Accumulated Amortization 4,699 7,043
Technology [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 1,507 1,507
Accumulated Amortization 1,105 702
Total 402 805
Trademarks [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 73 876
Accumulated Amortization $ 73 $ 876