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Property, Plant, and Equipment (Detail) (USD $)
Dec. 31, 2013
Dec. 31, 2012
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 78,191,000 $ 71,674,000
Less accumulated depreciation and amortization 37,855,000 31,565,000
Property, plant and equipment- net 40,336,000 40,109,000
Land
    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 650,000 650,000
Building and Leasehold Improvements
    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 20,041,000 19,366,000
Equipment and Fixtures
    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 57,345,000 51,511,000
Vehicle
    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 155,000 $ 147,000