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Note 7 - Debt, Credit Facility and Leases (Tables)
3 Months Ended
Mar. 31, 2022
Notes Tables  
Schedule of Long-Term Debt Instruments [Table Text Block]
  

March 31, 2022

 
  

Senior Notes

  

IQ Notes

  

Total

 

Principal

 $475,000  $38,605  $513,605 

Unamortized discount/premium and issuance costs

  (5,324)  571   (4,753)

Long-term debt balance

 $469,676  $39,176  $508,852 
  

December 31, 2021

 
  

Senior Notes

  

IQ Notes

  

Total

 

Principal

 $475,000  $38,051  $513,051 

Unamortized discount/premium and issuance costs

  (5,552)  596   (4,956)

Long-term debt balance

 $469,448  $38,647  $508,095 
Schedule of Maturities of Long Term Debt and Finance and Operating Lease Liabilities [Table Text Block]

Twelve-month period ending March 31,

 

Senior Notes

  

IQ Notes

  

Finance Leases

  

Operating Leases

 

2023

 $34,438  $2,515  $6,365  $3,057 

2024

  34,438   2,515   4,881   2,528 

2025

  34,438   2,515   3,313   1,079 

2026

  34,438   39,295   943   1,059 

2027

  34,438         1,041 

Thereafter

  505,130         6,174 

Total

 $677,320  $46,840  $15,502  $14,938