Annual report pursuant to Section 13 and 15(d)

Employee Benefits and Share-Based Compensation - Amounts Related to Shipboard Retirement Plan (Details)

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Employee Benefits and Share-Based Compensation - Amounts Related to Shipboard Retirement Plan (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Pension expense:      
Service cost $ 2,902 $ 2,665 $ 2,135
Interest cost 717 895 1,001
Amortization of prior service cost 378 378 378
Amortization of actuarial loss 15 29  
Total pension expense 4,012 3,967 3,514
Change in projected benefit obligation:      
Projected benefit obligation at beginning of year 31,619 28,695 24,318
Service cost 2,902 2,665 2,135
Interest cost 717 895 1,001
Actuarial (gain) loss   62 2,308
Direct benefit payments (550) (698) (1,067)
Projected benefit obligation at end of year 34,688 31,619 28,695
Amounts recognized in the consolidated balance sheets:      
Projected benefit obligation 34,688 31,619 28,695
Amounts recognized in accumulated other comprehensive income (loss):      
Prior service cost (3,025) (3,403) (3,781)
Accumulated actuarial loss (3,431) (3,446) (3,413)
Accumulated other comprehensive income (loss) $ (6,456) $ (6,849) $ (7,194)