v3.19.3.a.u2
COMMITMENTS AND CONTINGENCIES (Tables)
12 Months Ended
Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Future Minimum Payments for Operating Leases and Purchase Obligations [Table Text Block]
Future minimum rental payments applicable to all noncancellable purchase obligations as of December 31, 2019 are as follows:
 
Payments Due by Period
 
2020
 
2021
 
2022
 
2023
 
2024
 
There-
after
 
Total
 
(Thousands of Dollars)
Purchase obligations
$
8,935

 
$
7,643

 
$
6,202

 
$
1,485

 
$
812

 
$
5,157

 
$
30,234