v3.19.3.a.u2
HEALTH, SAFETY AND ENVIRONMENTAL MATTERS (Tables)
 12 Months Ended
Dec. 31, 2019
Environmental Remediation Obligations [Abstract]  
Schedule of Environmental Accrual Rollforward [Table Text Block]
The balance of and changes in the accruals for environmental matters were as follows:
 
Year Ended December 31,
 
2019
 
2018
 
(Thousands of Dollars)
Balance as of the beginning of year
$
7,753

 
$
5,095

Additions to accrual
3,700

 
5,708

Payments
(3,515
)
 
(3,050
)
Balance as of the end of year
$
7,938

 
$
7,753
Environmental Accruals By Balance Sheet Location [Table Text Block]
Accruals for environmental matters are included in the consolidated balance sheets as follows:
 
December 31,
 
2019
 
2018
 
(Thousands of Dollars)
Accrued liabilities
$
4,837

 
$
4,349

Other long-term liabilities
3,101

 
3,404

Accruals for environmental matters
$
7,938

 
$
7,753