Other Assets - Share of Equity Income From Investments (Details) - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Schedule of Investments [Line Items]
Share of equity (loss) income from investments		$ (29,085,000)	$ (78,013,000)	$ (137,044,000)	$ (140,258,000)
Dividends received	[1]	0	0	0	2,215,000
TUI Cruises
Schedule of Investments [Line Items]
Dividends received		$ 0	$ 0	$ 0	$ 0

[1] There were no dividends received from TUI Cruises for the quarters and nine months ended September 30, 2021 and September 30, 2020