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Retirement Plans
 3 Months Ended
Mar. 31, 2020
Retirement Benefits [Abstract]  
Retirement Plans Retirement Plans
Net periodic pension expense for our defined benefit pension plans includes the following components:
 
 
 
Three Months Ended
March 31,
(in thousands)
Location of Component
 
2020
 
2019
Service cost
Cost of revenue
 
$
4,384

 
$
3,981

Interest cost
Corp G&A
 
2,394

 
4,975

Expected return on assets
Corp G&A
 
(6,356
)
 
(8,279
)
Amortization of prior service credit
Corp G&A
 
(218
)
 
(225
)
Recognized net actuarial loss
Corp G&A
 
1,402

 
2,619

Net periodic pension expense
 
 
$
1,606

 
$
3,071



We currently expect to contribute up to $15 million into our defined benefit pension plans during 2020, which is expected to be in excess of the minimum funding required. During the three months ended March 31, 2020, we made contributions of approximately $7 million.