Other Assets - Share of Equity Income From Investments (Details) - USD ($)		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Schedule of Investments [Line Items]
Share of equity (loss) income from investments		$ (59,871,000)	$ (10,392,000)
Dividends received	[1]	0	1,991,000
TUI Cruises
Schedule of Investments [Line Items]
Dividends received		$ 0	$ 0

[1] There were no dividends received from TUI Cruises for the quarters ended March 31, 2021 and March 31, 2020