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

Shareholders and their Share Ownership (Parenthetical) (Detail)

v2.4.0.8
Shareholders and their Share Ownership (Parenthetical) (Detail)
Jun. 30, 2013
Dec. 31, 2012
Dec. 31, 2011
Related Party Transaction [Line Items]      
Number of Shares 204,014,702 21,000,000 21,000,000
Apollo Funds
      
Related Party Transaction [Line Items]      
Number of Shares   7,875,000 [1]  
Apollo Funds | NCL Investment Ltd.
      
Related Party Transaction [Line Items]      
Number of Shares   2,795,968  
Apollo Funds | NCL Investment II Ltd.
      
Related Party Transaction [Line Items]      
Number of Shares   5,079,032  
TPG Viking Funds
      
Related Party Transaction [Line Items]      
Number of Shares   2,625,000 [2]  
TPG Viking Funds | TPG Viking I, L.P.
      
Related Party Transaction [Line Items]      
Number of Shares   1,957,525  
TPG Viking Funds | TPG Viking II, L.P.
      
Related Party Transaction [Line Items]      
Number of Shares   576,118  
TPG Viking Funds | TPG Viking AIV-III, L.P.
      
Related Party Transaction [Line Items]      
Number of Shares   91,357  
[1] The Apollo Funds own their ordinary shares indirectly through NCL Investment Ltd., a Bermuda company (2,795,968 ordinary shares) and NCL Investment II Ltd., a Cayman Islands company (5,079,032 ordinary shares).
[2] The TPG Viking Funds own their ordinary shares through TPG Viking I, L.P., a Cayman Islands exempted limited partnership (1,957,525 ordinary shares), TPG Viking II, L.P., a Cayman Islands exempted limited partnership (576,118 ordinary shares) and TPG Viking AIV-III, L.P., a Delaware limited partnership (91,357 ordinary shares).