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EMPLOYEE BENEFIT PLANS
 6 Months Ended
Jun. 30, 2014
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]  
EMPLOYEE BENEFIT PLANS
EMPLOYEE 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 June 30:
 
 
 
 
 
 
 
Service cost
$
2,012

 
$
4,080

 
$
94

 
$
293

Interest cost
1,056

 
1,259

 
93

 
235

Expected return on assets
(1,144
)
 
(1,134
)
 
—

 
—

Amortization of prior service credit
(516
)
 
(10
)
 
(286
)
 
(50
)
Amortization of net (gain) loss
(260
)
 
518

 
28

 
52

Other (b)
(214
)
 
—

 
—

 
—

Net periodic benefit cost
$
934

 
$
4,713

 
$
(71
)
 
$
530

 
 
 
 
 
 
 
 
For the six months ended June 30:
 
 
 
 
 
 
 
Service cost
$
4,024

 
$
8,160

 
$
188

 
$
586

Interest cost
2,113

 
2,518

 
186

 
470

Expected return on assets
(2,288
)
 
(2,268
)
 
—

 
—

Amortization of prior service credit
(1,032
)
 
(20
)
 
(572
)
 
(100
)
Amortization of net (gain) loss
(215
)
 
1,036

 
56

 
104

Other (b)
(214
)
 
180

 
—

 
—

Net periodic benefit cost
$
2,388

 
$
9,606

 
$
(142
)
 
$
1,060

(a)
Includes amounts related to the pension plan, the excess pension plan and the supplemental executive retirement plan (the SERP).
(b)
In 2014, other relates to a settlement credit associated with the SERP and in 2013 includes charges related to NuStar Energy’s sale of its fuels refinery in San Antonio, Texas and related assets on January 1, 2013.