INCOME TAXES (Tables)

12 Months Ended

Dec. 31, 2016

Income Tax Disclosure [Abstract]

Components of income tax benefit (expense)

Components of income tax benefit (expense) were as follows:

	Year Ended December 31,
	2016			2015			2014
	(Thousands of Dollars)
Current:
U.S. federal	$	—		$	—		$	1,123
U.S. state	(9		)	51			42
Total current	(9		)	51			1,165
Deferred:
U.S. federal	76			(940		)	415
U.S. state	(1		)	(12		)	206
Total deferred	75			(952		)	621
Total income tax benefit (expense)	$	66		$	(901	)	$	1,786

The tax effects of significant temporary differences representing deferred income tax assets and liabilities

The tax effects of significant temporary differences representing deferred income tax assets and liabilities were as follows:

	December 31,
	2016			2015
	(Thousands of Dollars)
Deferred income tax assets:
Unit-based compensation	$	—		$	2,115
Pension	—			7,561
Capital loss	1,344			1,290
Net operating loss	5,239			4,346
Foreign tax credits	74			69
Other	80			14
Total deferred income tax assets	6,737			15,395
Less: Valuation allowance	(1,418		)	(1,359		)
Net deferred income tax assets	5,319			14,036
Deferred income tax liabilities:
Investment in Riverwalk Logistics, L.P. and NuStar Energy	(233		)	(249		)
Other employee benefits	—			(11,189		)
Deferred income tax liabilities	(233		)	(11,438		)
Total net deferred income tax assets	$	5,086		$	2,598
Reported on the consolidated balance sheets as:
Deferred income tax assets, net (long-term)	$	5,086		$	5,258
Deferred income tax liabilities, net (current)	—			(2,660		)
Total net deferred income tax assets	$	5,086		$	2,598