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Other - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Other [Line Items]      
Depreciation and amortization expense $ 8,000 $ 7,200 $ 7,700
Accumulated depreciation and amortization 102,794 96,273  
Assets Held under Capital Leases      
Other [Line Items]      
Machinery, furniture and equipment 2,200 2,300  
Accumulated depreciation and amortization 2,000 $ 2,100  
Depreciation Adjustment      
Other [Line Items]      
Depreciation and amortization expense $ 1,200