Quarterly report pursuant to Section 13 or 15(d)

Accumulated Other Comprehensive Income (Loss) (Details)

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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Accumulated other comprehensive income (loss) at beginning of period $ 26,966  
Accumulated other comprehensive income (loss) at end of period 73,862  
Accumulated Other Comprehensive Income (Loss)    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Accumulated other comprehensive income (loss) at beginning of period 26,966 $ (314,473)
Current period other comprehensive income before reclassifications 48,576 (7,283)
Amounts reclassified into earnings (1,680) 9,810
Accumulated other comprehensive income (loss) at end of period 73,862 (311,946)
Change Related to Cash Flow Hedges    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Accumulated other comprehensive income (loss) at beginning of period 33,861 (307,618)
Current period other comprehensive income before reclassifications 48,576 (7,283)
Amounts reclassified into earnings [1] (1,785) 9,705
Accumulated other comprehensive income (loss) at end of period 80,652 [2] (305,196)
Change Related to Shipboard Retirement Plan    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Accumulated other comprehensive income (loss) at beginning of period (6,895) (6,855)
Current period other comprehensive income before reclassifications 0 0
Amounts reclassified into earnings [3] 105 105
Accumulated other comprehensive income (loss) at end of period $ (6,790) $ (6,750)
[1] We refer you to Note 7 "Fair Value Measurements and Derivatives" for the affected line items in the consolidated statements of operations.
[2] Includes $9.5 million of gain expected to be reclassified into earnings in the next 12 months.
[3] Amortization of prior-service cost and actuarial loss reclassified to other income (expense).