Discontinued Operations and Assets Held for Sale (Tables)

12 Months Ended

Dec. 31, 2016

Discontinued Operations and Assets Held for Sale [Abstract]

Major Categories of Assets and Liabilities Reflected as Held for Sale

(Thousands of dollars)	2016		2015
Current assets
Cash	$	4,126	7,927
Accounts receivable		22,944	29,358
Other		–	1,055
Total current assets held for sale	$	27,070	38,340
Current liabilities
Accounts payable	$	270	2,433
Accrued compensation and severance		–	2,179
Refinery decommissioning cost		2,506	2,685
Total current liabilities associated with assets held for sale	$	2,776	7,297
Non-current liabilities
Asset retirement obligation – Seal asset	$	85,900	–
Total non-current liabilities associated with assets held for sale	$	85,900	–

Results of Operations Associated with Discontinued Operations

(Thousands of dollars)	2016		2015	2014
Revenues	$	–	381,747	2,786,394
Loss from operations before income taxes	$	(2,027)	(6,758)	(261,873)
Gain (loss) on sale before income taxes		–	(4,990)	101,684
Total loss from discontinued operations before taxes		(2,027)	(11,748)	(160,189)
Income tax expense (benefit)		–	3,313	(40,827)
Loss from discontinued operations	$	(2,027)	(15,061)	(119,362)