| 
           Commitments and Contingencies - Additional Information (Detail) 
         | 
        1 Months Ended | 9 Months Ended | ||||
|---|---|---|---|---|---|---|
| 
           Sep. 30, 2012
 
          USD ($) 
         | 
        
           Feb. 28, 2011
 
          LegalMatter 
         | 
        
           Sep. 30, 2013
 
          Contractual Agreement One
 
          USD ($)
 
          T
 
          Seat 
         | 
        
           Sep. 30, 2013
 
          Contractual Agreement One
 
          EUR (€) 
         | 
        
           Sep. 30, 2013
 
          Contractual Agreement Two
 
          USD ($)
 
          Vessel
 
          Seat
 
          T 
         | 
        
           Sep. 30, 2013
 
          Contractual Agreement Two
 
          EUR (€) 
         | 
      |
| Commitments and Contingencies Disclosure [Line Items] | ||||||
| Scheduled delivery date of ships under construction | January 2014 | January 2014 | Fourth quarter of 2015 and the first quarter of 2017 | Fourth quarter of 2015 and the first quarter of 2017 | ||
| Capacity of ship, tons | 144,000 | 144,000 | 163,000 | 163,000 | ||
| Capacity of ship, berths | 4,000 | 4,000 | 4,200 | 4,200 | ||
| Aggregate contract price of new ships | $ 849,100,000 | € 627,700,000 | $ 1,900,000,000 | € 1,400,000,000 | ||
| Export credit facility financing as percentage of contract price | 90.00% | 90.00% | 80.00% | 80.00% | ||
| Cruising ships to be built | 2 | 2 | ||||
| Number of individual plaintiff's claims | 6 | |||||
| Awarded wages to plaintiffs | $ 100,000 | |||||
| X | ||||||||||
| 
             
- Definition 
          Carrying Capacity Of Ships No definition available. 
  | 
        
| X | ||||||||||
| 
             
- Details 
          
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Contract Value No definition available. 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Expected Ship Delivery Date No definition available. 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Financing Percentage No definition available. 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Number Of Ships Under Construction No definition available. 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Ship Passenger Capacity Berths No definition available. 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Amount of damages awarded to the plaintiff in the legal matter. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          The total number of new claims filed pertaining to a loss contingency during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  |