Description Of Business And Basis Of Presentation (Schedule of Ship Operating) (Details)	3 Months Ended
	Mar. 31, 2023
Mein Schiff 6 [Member]
Operation start date	Jun. 11, 2021
Operation end date	Apr. 18, 2022
TUI Cruises [Member] | Mein Schiff Herz [Member]
Operation start date	Apr. 05, 2022
Operation end date description	April 16, 2023