Commitments and Contingencies - Additional Information (Detail Textuals) - 9 months ended Sep. 30, 2015 - Ship Construction Contracts € in Millions, $ in Millions  | 
 USD ($)  
CruiseShip  
Gross_Ton  
Berth 
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 EUR (€)  
CruiseShip  
Gross_Ton  
Berth 
 | 
|---|---|---|
| Commitments and Contingencies Disclosure [Line Items] | ||
| Scheduled delivery date of ships under construction | spring of 2017, spring of 2018 and fall of 2019 | |
| Cruise ships to be built | 3 | 3 | 
| Capacity of ship, tons | Gross_Ton | 164,600 | 164,600 | 
| Capacity of ship, berths | Berth | 4,000 | 4,000 | 
| Aggregate contract price of new ships | $ 2,800.0 | € 2,500.0 | 
| Export credit facility financing as percentage of contract prices | 80.00% | 80.00% | 
| Fincantieri Shipyard | ||
| Commitments and Contingencies Disclosure [Line Items] | ||
| Aggregate contract price of new ships | $ 410.4 | € 367.2 | 
| Export credit facility financing as percentage of contract prices | 80.00% | 80.00% | 
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- Definition Represents the carrying capacity of ships. No definition available. 
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- Definition Commitments and Contingencies Disclosure [Line Items] No definition available. 
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- Definition Represents the aggregate contract value. No definition available. 
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- Definition Expected ship delivery date. No definition available. 
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- Definition Represents the financing percentage. No definition available. 
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- Definition Number of ships under construction. No definition available. 
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- Definition Represents the ship passenger capacity berths. No definition available. 
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- Details 
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- Details 
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