Goodwill and Trade Names - Changes in Carrying Amount of Goodwill (Details) $ in Thousands	12 Months Ended
Dec. 31, 2020 USD ($)
Goodwill [Line Items]
Impairment loss	$ (1,290,797)
Balance	98,134
Norwegian Cruise Line
Goodwill [Line Items]
Impairment loss	(403,805)
Oceania Cruises
Goodwill [Line Items]
Impairment loss	(523,026)
Regent Seven Seas Cruises
Goodwill [Line Items]
Impairment loss	(363,966)
Balance	$ 98,134

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration