v3.8.0.1
ACCRUED LIABILITIES (Tables)
12 Months Ended
Dec. 31, 2017
Accrued Liabilities, Current [Abstract]
Schedule of Accrued Liabilities [Table Text Block]
Accrued liabilities consisted of the following:
December 31,
2017
2016
(Thousands of Dollars)
Employee wages and benefit costs
$
16,963
$
30,807
Unearned income
18,243
14,355
Other
26,372
15,323
Accrued liabilities
$
61,578
$
60,485
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Tabular disclosure of the components of accrued liabilities.
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