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Other Current Liabilities - Schedule of Other Current Liabilities (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Other Liabilities Disclosure [Abstract]    
Customer-related liabilities $ 10,986 $ 10,610
Accrued sales commissions 1,572 1,648
Income taxes payable 19 1,063
Other 6,924 8,399
Other current liabilities $ 19,501 $ 21,720