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Defined Benefit Plans
 3 Months Ended
Mar. 31, 2015
Compensation and Retirement Disclosure [Abstract]  
Defined Benefit Plans
Defined Benefit Plans
The components of the combined net periodic expense (benefit) for our defined benefit pension plans were as follows:
 
Three Months Ended 
 March 31,
 
2015
 
2014
Expected return on plan assets, net of expenses
$
(2,983
)
 
$
(3,129
)
Interest cost on projected benefit obligation
2,052

 
2,001

Net amortization and deferral
1,749

 
672

Net periodic expense (benefit)
$
818

 
$
(456
)

Our non-qualified defined benefit pension plan is not funded. No contributions to the qualified defined benefit pension plan were made during the three months ended March 31, 2015. We do not expect to make any contributions to the qualified defined benefit plan during the remainder of 2015.