Property and Equipment (Details) - passenger	1 Months Ended
Apr. 30, 2019	Mar. 31, 2019
NAA Segment
Property, Plant and Equipment [Line Items]
Passenger capacity of ship sold	1,260	1,680

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration