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CONCENTRATION OF CREDIT RISK AND MAJOR CUSTOMERS (Tables)
12 Months Ended
Dec. 31, 2023
CONCENTRATION OF CREDIT RISK AND MAJOR CUSTOMERS  
Schedule of total revenues from major customers

Year Ended December 31, 

 

    

Segment

    

2023

2022

2021

 

(in thousands)

Customer A

 

Illinois Basin/Appalachia

$

332,500

$

$

Customer B

Illinois Basin

253,573

260,146

Customer C

Illinois Basin

328,406

239,482

Customer D

 

Illinois Basin/Appalachia

 

228,480