Property and Equipment (Schedule of Property and Equipment) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
Ships	$ 31,357,703	$ 29,872,655
Ship improvements	2,152,457	2,108,922
Ships under construction	1,180,486	1,078,243
Land, buildings and improvements, including leasehold improvements and port facilities	746,785	524,849
Computer hardware and software, transportation equipment and other	1,650,249	1,678,903
Total property and equipment	37,087,680	35,263,572
Less-accumulated depreciation and amortization	(11,179,731)	(10,016,977)
Property and equipment, net	$ 25,907,949	$ 25,246,595