Annual report pursuant to Section 13 and 15(d)

Property, Plant and Equipment - Property, Plant and Equipment (Detail)

v2.4.1.9
Property, Plant and Equipment - Property, Plant and Equipment (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Property, Plant and Equipment [Line Items]    
Land 10,463us-gaap_Land $ 10,463us-gaap_Land
Buildings 63,837us-gaap_BuildingsAndImprovementsGross 62,515us-gaap_BuildingsAndImprovementsGross
Machinery and equipment 228,284us-gaap_MachineryAndEquipmentGross 198,611us-gaap_MachineryAndEquipmentGross
Furniture and fixtures 5,354us-gaap_FurnitureAndFixturesGross 5,143us-gaap_FurnitureAndFixturesGross
Transportation equipment 3,748gifi_TransportationEquipmentGross 3,224gifi_TransportationEquipmentGross
Improvements 125,265us-gaap_LandImprovements 123,201us-gaap_LandImprovements
Construction in progress 1,177us-gaap_ConstructionInProgressGross 7,450us-gaap_ConstructionInProgressGross
Property, plant and equipment, Gross 438,128us-gaap_PropertyPlantAndEquipmentGross 410,607us-gaap_PropertyPlantAndEquipmentGross
Less accumulated depreciation 213,351us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment 187,052us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Property, plant and equipment, Net 224,777us-gaap_PropertyPlantAndEquipmentNet $ 223,555us-gaap_PropertyPlantAndEquipmentNet
Land [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, estimated useful life 0 years  
Building [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, estimated useful life 25 years  
Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, estimated useful life 15 years  
Construction in Progress [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, estimated useful life 0 years  
Minimum [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, estimated useful life 3 years  
Minimum [Member] | Machinery and equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, estimated useful life 3 years  
Minimum [Member] | Furniture and fixtures [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, estimated useful life 3 years  
Minimum [Member] | Transportation equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, estimated useful life 3 years  
Maximum [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, estimated useful life 25 years  
Maximum [Member] | Machinery and equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, estimated useful life 25 years  
Maximum [Member] | Furniture and fixtures [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, estimated useful life 5 years  
Maximum [Member] | Transportation equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, estimated useful life 5 years