Annual report pursuant to Section 13 and 15(d)

Estimated Useful Lives Of Property, Plant and Equipment (Detail)

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Estimated Useful Lives Of Property, Plant and Equipment (Detail)
12 Months Ended
Dec. 31, 2012
Building
 
Property, Plant, and Equipment Disclosure [Line Items]  
Property, Plant and Equipment, Useful Life 30 years
Leasehold Improvements | Minimum
 
Property, Plant, and Equipment Disclosure [Line Items]  
Property, Plant and Equipment, Useful Life 3 years
Leasehold Improvements | Maximum
 
Property, Plant, and Equipment Disclosure [Line Items]  
Property, Plant and Equipment, Useful Life 5 years
Equipment and Computers | Minimum
 
Property, Plant, and Equipment Disclosure [Line Items]  
Property, Plant and Equipment, Useful Life 3 years
Equipment and Computers | Maximum
 
Property, Plant, and Equipment Disclosure [Line Items]  
Property, Plant and Equipment, Useful Life 5 years
Furniture and Fixtures
 
Property, Plant, and Equipment Disclosure [Line Items]  
Property, Plant and Equipment, Useful Life 5 years