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Summary of Estimated Useful Lives (Detail) | 12 Months Ended
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Dec. 31, 2011 Year
Building and Improvements |
Property, Plant and Equipment [Line Items] |
Property, plant and equipment, minimum useful life | 20
Property, plant and equipment, maximum useful life | 40
Furniture and Fixtures |
Property, Plant and Equipment [Line Items] |
Property, plant and equipment, minimum useful life | 3
Property, plant and equipment, maximum useful life | 7
Machinery and Equipment |
Property, Plant and Equipment [Line Items] |
Property, plant and equipment, minimum useful life | 3
Property, plant and equipment, maximum useful life | 10

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The maximum useful life of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLifeMaximum
Namespace Prefix: | us-gaap_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition The minimum useful life of long lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLifeMinimum
Namespace Prefix: | us-gaap_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration