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Note 10 - Fair Value Disclosures (Tables)
12 Months Ended
Dec. 31, 2020
Notes Tables  
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block]
  

December 31, 2020

  

December 31, 2019

 
  

Carrying Amount

  

Fair Value

  

Carrying Amount

  

Fair Value

 
  

(Dollars in thousands)

 
7.25% Senior Notes due 2025, net (1) $244,865  $256,875  $  $ 

7.25% Senior Notes due 2022, net (2)

 $  $  $304,832  $298,775