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, 2020
Dec. 31, 2019
Dec. 31, 2018
Pension expense:      
Service cost $ 2,665 $ 2,135 $ 2,167
Interest cost 895 1,001 857
Amortization of prior service cost 378 378 378
Amortization of actuarial loss 29   51
Total pension expense 3,967 3,514 3,453
Change in projected benefit obligation:      
Projected benefit obligation at beginning of year 28,695 24,318 24,587
Service cost 2,665 2,135 2,167
Interest cost 895 1,001 857
Actuarial (gain) loss 62 2,308 (2,271)
Direct benefit payments (698) (1,067) (1,022)
Projected benefit obligation at end of year 31,619 28,695 24,318
Amounts recognized in the consolidated balance sheets:      
Projected benefit obligation 31,619 28,695 24,318
Amounts recognized in accumulated other comprehensive income (loss):      
Prior service cost (3,403) (3,781) (4,159)
Accumulated actuarial loss (3,446) (3,413) (1,105)
Accumulated other comprehensive income (loss) $ (6,849) $ (7,194) $ (5,264)