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, 2019
Dec. 31, 2018
Dec. 31, 2017
Pension expense:      
Service cost $ 2,135 $ 2,167 $ 1,987
Interest cost 1,001 857 887
Amortization of prior service cost 378 378 378
Amortization of actuarial loss   51 40
Total pension expense 3,514 3,453 3,292
Change in projected benefit obligation:      
Projected benefit obligation at beginning of year 24,318 24,587 22,605
Service cost 2,135 2,167 1,987
Interest cost 1,001 857 887
Actuarial gain (loss) 2,308 (2,271) 458
Direct benefit payments (1,067) (1,022) (1,350)
Projected benefit obligation at end of year 28,695 24,318 24,587
Amounts recognized in the consolidated balance sheets:      
Projected benefit obligation 28,695 24,318 24,587
Amounts recognized in accumulated other comprehensive income (loss):      
Prior service cost (3,781) (4,159) (4,537)
Accumulated actuarial loss (3,413) (1,105) (3,426)
Accumulated other comprehensive income (loss) $ (7,194) $ (5,264) $ (7,963)