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Property, Plant And Equipment (Property, Plant and Equipment) (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 55,754 $ 75,494
Less accumulated depreciation and amortization 36,001 46,465
Property, plant and equipment- net 19,753 29,029
Land [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 565 650
Building and Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 12,698 13,122
Equipment and Fixtures [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 42,342 61,573
Vehicles [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 149 $ 149