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Note 13 - Goodwill and Other Intangible Assets (Tables)
12 Months Ended
Dec. 31, 2020
Notes Tables  
Schedule of Finite-Lived Intangible Assets [Table Text Block]
          

Weighted Average

 
  

December 31,

  

Amortization

 
  

2020

  

2019

  

Period

 

Finite-lived intangibles:

            

Customer relationships

 $131.7  $118.6   11.0 

Non-competition agreements

  7.9   6.9   6.6 

Trade names

  3.8   3.8   2.0 

LDC Network

  10.5   10.5   10.0 

Total finite-lived intangibles

  153.9   139.8     

Less accumulated amortization

  (47.1)  (33.3)    

Total identifiable intangible assets, net

 $106.8  $106.5