INCOME TAXES (Tables)

12 Months Ended

Dec. 31, 2013

Income Tax Disclosure [Abstract]

Components of income tax (expense) benefit

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

	Year Ended December 31,
	2013			2012			2011
	(Thousands of Dollars)
Current:
U.S. federal	$	—		$	465		$	129
U.S. state	(368		)	(42		)	8
Total current	(368		)	423			137
Deferred:
U.S. federal	(599		)	433			251
U.S. state	175			10			13
Total deferred	(424		)	443			264
Total income tax (expense) benefit	$	(792	)	$	866		$	401

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,
	2013			2012
	(Thousands of Dollars)
Deferred income tax assets:
Share/option compensation	$	2,976		$	4,444
Pension	4,318			15,815
Capital loss	474			270
Other state	—			1,263
Net operating loss	3,519			1,104
Foreign tax credits	44			20
Deferred income tax assets	11,331			22,916
Deferred income tax liabilities:
Investment in Riverwalk Logistics, L.P. and NuStar Energy	(233		)	(213		)
Other state	(191		)	—
Other employee benefits	(13,531		)	(1,351		)
Total net deferred income tax (liabilities) assets	$	(2,624	)	$	21,352