EMPLOYEE BENEFIT PLANS

3 Months Ended

Mar. 31, 2013

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



	Pension Plans (a)						Other Postretirement Benefit Plans
	2013			2012			2013			2012
	(Thousands of Dollars)
For the three months ended March 31:
Components of net periodic benefit cost:
Service cost	$	4,080		$	3,904		$	293		$	315
Interest cost	1,259			1,003			235			244
Expected return on assets	(1,134		)	(979		)	—			—
Amortization of prior service credit	(10		)	(4		)	(50		)	—
Amortization of net loss	518			348			52			35
Net periodic benefit cost before disposition charge	$	4,713		$	4,272		$	530		$	594
Disposition charge (b)	180			—			—			—
Net periodic benefit cost	$	4,893		$	4,272		$	530		$	594


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


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

- Definition

The entire disclosure for pension and other postretirement benefits.

+ References

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+ Details