General form of registration statement for all companies including face-amount certificate companies

Estimated Useful Lives of Assets (Detail)

v2.4.0.8
Estimated Useful Lives of Assets (Detail)
12 Months Ended
Dec. 31, 2012
Ships
 
Property, Plant and Equipment [Line Items]  
Property and equipment useful life 30 years
Buildings | Minimum
 
Property, Plant and Equipment [Line Items]  
Property and equipment useful life 15 years
Buildings | Maximum
 
Property, Plant and Equipment [Line Items]  
Property and equipment useful life 30 years
Computer hardware and software | Minimum
 
Property, Plant and Equipment [Line Items]  
Property and equipment useful life 3 years
Computer hardware and software | Maximum
 
Property, Plant and Equipment [Line Items]  
Property and equipment useful life 5 years
Other property and equipment | Minimum
 
Property, Plant and Equipment [Line Items]  
Property and equipment useful life 3 years
Other property and equipment | Maximum
 
Property, Plant and Equipment [Line Items]  
Property and equipment useful life 40 years
Leasehold improvements
 
Property, Plant and Equipment [Line Items]  
Property and equipment useful life Shorter of lease term or asset life