EMPLOYEE BENEFIT PLANS (Tables)

3 Months Ended

Mar. 31, 2014

Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]

The components of net periodic benefit cost related to our defined benefit plans

The components of net periodic benefit cost related to our defined benefit plans were as follows:

	Pension Plans (a)						Other Postretirement Benefit Plans
	2014			2013			2014			2013
	(Thousands of Dollars)
For the three months ended March 31:
Components of net periodic benefit cost:
Service cost	$	2,012		$	4,080		$	94		$	293
Interest cost	1,057			1,259			93			235
Expected return on assets	(1,144		)	(1,134		)	—			—
Amortization of prior service credit	(516		)	(10		)	(286		)	(50		)
Amortization of net loss	45			518			28			52
Net periodic benefit cost before other charges	1,454			4,713			(71		)	530
Other charges (b)	—			180			—			—
Net periodic benefit cost	$	1,454		$	4,893		$	(71	)	$	530

(a) Includes amounts related to the pension plan, the excess pension plan and the supplemental executive retirement plan.

(b) Other charges in 2013 relate to NuStar Energy’s sale of its fuels refinery in San Antonio, Texas and related assets on January 1, 2013.