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Other Assets - Share of Equity Income From Investments (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Schedule of Investments [Line Items]        
Share of equity (loss) income from investments $ (48,088,000) $ (51,853,000) $ (107,959,000) $ (62,245,000)
Dividends received [1] 0 0 0 $ 1,991,000
TUI Cruises        
Schedule of Investments [Line Items]        
Dividends received $ 0 $ 0 $ 0  
[1] There were no dividends received from TUI Cruises for the quarters and six months ended June 30, 2021 and June 30, 2020