Subsequent Events (Details) - Subsequent Event - passenger	1 Months Ended
	Jul. 31, 2020	Jun. 30, 2020
NAA Segment | Ship One Sold in June
Subsequent Event [Line Items]
Capacity of ship sold		1,350
NAA Segment | Ship Two Sold in June
Subsequent Event [Line Items]
Capacity of ship sold		1,260
NAA Segment | Ship One Sold in July
Subsequent Event [Line Items]
Capacity of ship sold	2,060
NAA Segment | Ship Two Sold in July
Subsequent Event [Line Items]
Capacity of ship sold	2,050
EA Segment | Ship One Sold in June
Subsequent Event [Line Items]
Capacity of ship sold		2,010
EA Segment | Ship Two Sold in June
Subsequent Event [Line Items]
Capacity of ship sold		1,930