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Goodwill and Intangible Assets - Intangible Assets - Finite Life (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]    
Cost $ 51,446 $ 52,709
Accumulated Amortization 11,047 5,896
Patents [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Cost 1,429 1,423
Accumulated Amortization 1,420 1,383
Employment agreements [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Cost 716 762
Accumulated Amortization 387 221
Technology [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Cost 8,522 8,942
Accumulated Amortization 2,018 789
Customer lists [Member]
    
Finite-Lived Intangible Assets [Line Items]    
Cost 40,779 41,582
Accumulated Amortization $ 7,222 $ 3,503