| Schedule of convertible debt instruments | 
 The following is a summary of NCLC’s exchangeable notes as of June 30, 2022 (in thousands): 
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Unamortized   | 
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  | 
  | 
  | 
 
   | 
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Principal  | 
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Deferred  | 
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Net Carrying  | 
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Fair Value  | 
 
  | 
      | 
Amount  | 
      | 
Financing Fees  | 
      | 
Amount  | 
      | 
Amount  | 
      | 
Leveling  | 
 
2024 Exchangeable Notes  | 
  | 
$  | 
 146,601  | 
  | 
$  | 
 (2,715)  | 
  | 
$  | 
 143,886  | 
  | 
$  | 
 157,902  | 
  | 
Level 2  | 
 
2025 Exchangeable Notes  | 
  | 
  | 
 450,000  | 
  | 
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 (7,543)  | 
  | 
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 442,457  | 
  | 
  | 
 423,477  | 
  | 
Level 2  | 
 
2027 1.125% Exchangeable Notes  | 
  | 
  | 
 1,150,000  | 
  | 
  | 
 (26,268)  | 
  | 
  | 
 1,123,732  | 
  | 
  | 
 738,323  | 
  | 
Level 2  | 
 
2027 2.5% Exchangeable Notes  | 
  | 
  | 
 473,175  | 
  | 
  | 
 (11,423)  | 
  | 
  | 
 461,752  | 
  | 
  | 
 323,595  | 
  | 
Level 2  | 
 
 
The following is a summary of NCLC’s exchangeable notes as of December 31, 2021 (in thousands): 
 
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Unamortized Debt   | 
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Discount,  | 
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   | 
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Principal  | 
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including Deferred  | 
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Net Carrying  | 
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Fair Value  | 
 
  | 
      | 
Amount  | 
      | 
Financing Fees  | 
      | 
Amount  | 
      | 
Amount  | 
      | 
Leveling  | 
 
2024 Exchangeable Notes  | 
  | 
$  | 
 146,601  | 
  | 
$  | 
 (3,408)  | 
  | 
$  | 
 143,193  | 
  | 
$  | 
 249,358  | 
  | 
Level 2  | 
 
2025 Exchangeable Notes  | 
  | 
  | 
 450,000  | 
  | 
  | 
 (8,525)  | 
  | 
  | 
 441,475  | 
  | 
  | 
 642,591  | 
  | 
Level 2  | 
 
2027 1.125% Exchangeable Notes  | 
  | 
  | 
 1,150,000  | 
  | 
  | 
 (28,948)  | 
  | 
  | 
 1,121,052  | 
  | 
  | 
 1,088,510  | 
  | 
Level 2  | 
 
 
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| Schedule of interest expense of convertible debt instruments | 
  
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Unamortized Debt   | 
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  | 
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  | 
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Discount,  | 
  | 
  | 
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  | 
 
   | 
  | 
Principal  | 
  | 
including Deferred  | 
  | 
Net Carrying  | 
  | 
Fair Value  | 
 
  | 
      | 
Amount  | 
      | 
Financing Fees  | 
      | 
Amount  | 
      | 
Amount  | 
      | 
Leveling  | 
 
2024 Exchangeable Notes  | 
  | 
$  | 
 146,601  | 
  | 
$  | 
 (3,408)  | 
  | 
$  | 
 143,193  | 
  | 
$  | 
 249,358  | 
  | 
Level 2  | 
 
2025 Exchangeable Notes  | 
  | 
  | 
 450,000  | 
  | 
  | 
 (8,525)  | 
  | 
  | 
 441,475  | 
  | 
  | 
 642,591  | 
  | 
Level 2  | 
 
2027 1.125% Exchangeable Notes  | 
  | 
  | 
 1,150,000  | 
  | 
  | 
 (28,948)  | 
  | 
  | 
 1,121,052  | 
  | 
  | 
 1,088,510  | 
  | 
Level 2  | 
 
 
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| Schedule of principal repayments on long-term debt including finance lease obligations | 
 The following are scheduled principal repayments on our long-term debt including finance lease obligations as of June 30, 2022 for each of the following periods (in thousands): 
 
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Year  | 
      | 
Amount  | 
 
Remainder of 2022  | 
  | 
$  | 
 529,276  | 
 
2023  | 
  | 
   | 
 937,406  | 
 
2024  | 
  | 
   | 
 3,686,473  | 
 
2025  | 
  | 
   | 
 1,070,738  | 
 
2026  | 
  | 
   | 
 1,973,939  | 
 
2027  | 
  | 
  | 
 3,024,927  | 
 
Thereafter  | 
  | 
   | 
 2,201,918  | 
 
Total  | 
  | 
$  | 
 13,424,677  | 
 
 
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