| Schedule of convertible debt instruments | 
 The following is a summary of NCLC’s exchangeable notes as of March 31, 2023 (in thousands): 
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  | 
  | 
  | 
  | 
  | 
Unamortized   | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
 
   | 
  | 
Principal  | 
  | 
Deferred  | 
  | 
Net Carrying  | 
  | 
Fair Value  | 
 
  | 
      | 
Amount  | 
      | 
Financing Fees  | 
      | 
Amount  | 
      | 
Amount  | 
      | 
Leveling  | 
 
2024 Exchangeable Notes  | 
  | 
$  | 
 146,601  | 
  | 
$  | 
 (1,678)  | 
  | 
$  | 
 144,923  | 
  | 
$  | 
 171,352  | 
  | 
Level 2  | 
 
2025 Exchangeable Notes  | 
  | 
  | 
 450,000  | 
  | 
  | 
 (5,828)  | 
  | 
  | 
 444,172  | 
  | 
  | 
 471,600  | 
  | 
Level 2  | 
 
2027 1.125% Exchangeable Notes  | 
  | 
  | 
 1,150,000  | 
  | 
  | 
 (22,145)  | 
  | 
  | 
 1,127,855  | 
  | 
  | 
 847,861  | 
  | 
Level 2  | 
 
2027 2.5% Exchangeable Notes  | 
  | 
  | 
 473,175  | 
  | 
  | 
 (9,652)  | 
  | 
  | 
 463,523  | 
  | 
  | 
 366,815  | 
  | 
Level 2  | 
 
 
The following is a summary of NCLC’s exchangeable notes as of December 31, 2022 (in thousands): 
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  | 
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Unamortized Debt   | 
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  | 
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  | 
  | 
  | 
  | 
 
  | 
  | 
  | 
  | 
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Discount,  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
  | 
 
   | 
  | 
Principal  | 
  | 
including Deferred  | 
  | 
Net Carrying  | 
  | 
Fair Value  | 
 
  | 
      | 
Amount  | 
      | 
Financing Fees  | 
      | 
Amount  | 
      | 
Amount  | 
      | 
Leveling  | 
 
2024 Exchangeable Notes  | 
  | 
$  | 
 146,601  | 
  | 
$  | 
 (1,993)  | 
  | 
$  | 
 144,608  | 
  | 
$  | 
 161,840  | 
  | 
Level 2  | 
 
2025 Exchangeable Notes  | 
  | 
  | 
 450,000  | 
  | 
  | 
 (6,312)  | 
  | 
  | 
 443,688  | 
  | 
  | 
 433,580  | 
  | 
Level 2  | 
 
2027 1.125% Exchangeable Notes  | 
  | 
  | 
 1,150,000  | 
  | 
  | 
 (23,457)  | 
  | 
  | 
 1,126,543  | 
  | 
  | 
 763,830  | 
  | 
Level 2  | 
 
2027 2.5% Exchangeable Notes  | 
  | 
  | 
 473,175  | 
  | 
  | 
 (10,184)  | 
  | 
  | 
 462,991  | 
  | 
  | 
 331,743  | 
  | 
Level 2  | 
 
 
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| Schedule of interest expense of convertible debt instruments | 
 The following provides a summary of the interest expense of NCLC’s exchangeable notes (in thousands): 
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  | 
  | 
Three Months Ended   | 
 
  | 
  | 
March 31,   | 
 
  | 
  | 
2023  | 
      | 
2022  | 
 
Coupon interest  | 
  | 
$  | 
 14,438  | 
  | 
$  | 
 12,992  | 
 
Amortization of deferred financing fees  | 
  | 
  | 
 2,643  | 
  | 
  | 
 2,275  | 
 
Total  | 
  | 
$  | 
 17,081  | 
  | 
$  | 
 15,267  | 
 
 
 
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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 exchangeable notes which can be settled in shares and finance lease obligations as of March 31, 2023 (in thousands): 
 
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Year  | 
      | 
Amount  | 
 
Remainder of 2023  | 
  | 
$  | 
 770,436  | 
 
2024  | 
  | 
   | 
 1,943,331  | 
 
2025  | 
  | 
   | 
 1,846,760  | 
 
2026  | 
  | 
   | 
 2,053,382  | 
 
2027  | 
  | 
   | 
 3,106,106  | 
 
2028  | 
  | 
  | 
 1,762,008  | 
 
Thereafter  | 
  | 
   | 
 1,883,802  | 
 
Total  | 
  | 
$  | 
 13,365,825  | 
 
 
 
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