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Commitments and Contingencies - Additional Information (Detail Textuals)

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Commitments and Contingencies - Additional Information (Detail Textuals) - 6 months ended Jun. 30, 2016 - Ship Construction Contracts
€ in Millions, $ in Millions
USD ($)
Berth
Gross_Ton
EUR (€)
Berth
Gross_Ton
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 | Berth 3 3
Capacity of ship, tons | Gross_Ton 164,600 164,600
Aggregate contract price of new ships $ 2,900.0 € 2,600.0
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 $ 468.7 € 422.0
Export credit facility financing as percentage of contract prices 80.00% 80.00%