Annual report pursuant to Section 13 and 15(d)

Income Taxes (Detail Textuals)

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Income Taxes (Detail Textuals) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Schedule Of Income Taxes [Line Items]      
Unrecognized tax benefits $ 532 $ 11,144 $ 11,174
Valuation allowance   (3,594)  
US corporate income tax rate 35.00%    
Corporate income tax rate effective in 2018 21.00%    
Income tax expense due to reduction of deferred tax liabilties $ 7,400    
Unrecognized tax benefits, reversed (10,662)    
Prestige Cruises International Inc      
Schedule Of Income Taxes [Line Items]      
Net operating loss carryforwards $ 177,800 151,200  
U.S. net operating loss carryforwards, expiration year 2023    
U.S.      
Schedule Of Income Taxes [Line Items]      
Net operating loss carryforwards $ 254,800 256,300  
U.S. net operating loss carryforwards, expiration year 2023    
NORWAY      
Schedule Of Income Taxes [Line Items]      
Net operating loss carryforwards $ 13,900 22,900  
State and Local Jurisdiction      
Schedule Of Income Taxes [Line Items]      
Net operating loss carryforwards $ 8,900 12,400  
U.S. net operating loss carryforwards, expiration year 2025 through 2035    
U.K      
Schedule Of Income Taxes [Line Items]      
Net operating loss carryforwards $ 8,300 $ 9,500