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Pension and Other Postretirement Benefits
6 Months Ended
Jun. 30, 2013
Defined Benefit Plan Disclosure [Line Items]  
Pension And Other Postretirement Benefits
NOTE 11. Pension and Other Postretirement Benefits
                  
Components of Net Periodic Benefit Cost
                  
 Three Months Ended June 30,
             Other Postretirement
 Pension Benefits SERP Benefits
 2013 2012 2013 2012 2013 2012
Service cost$1,333 $1,201 $313 $34 $ 337 $ 272
Interest cost 1,794  1,776  102  75   217   201
Expected return on plan assets (2,412)  (2,349)  0  0  0  0
Amortization of prior service cost 6  6  54  28   29   28
Amortization of transition obligation 0  0  0  0   2   28
Amortization of net actuarial (gain) or loss 757  804  57  54  42  16
Net periodic postretirement benefit cost$1,478 $1,438 $526 $191 $ 627 $ 545
                  
  Six Months Ended June 30,
             Other Postretirement
 Pension Benefits SERP Benefits
 2013 2012 2013 2012 2013 2012
Service cost$2,666 $2,402 $626 $68 $674 $544
Interest cost 3,588  3,552  204  149  434  402
Expected return on plan assets (4,823)  (4,698)  0  0  0  0
Amortization of prior service cost 12  13  109  55  58  56
Amortization of transition obligation 0  0  0  0  4  57
Amortization of net actuarial (gain) or loss 1,514  1,608  113  109  84  31
Net periodic postretirement benefit cost$2,957 $2,877 $1,052 $381 $1,254 $1,090

Employer Contributions

Susquehanna previously disclosed in its financial statements for the year ended December 31, 2012, that it expected to contribute $365 to its pension plans and $621 to its other postretirement benefit plan in 2013. As of June 30, 2013, $183 of contributions had been made to its pension plans, and $311 of contributions had been made to its other postretirement benefit plan. Susquehanna anticipates contributing an additional $182 to fund its pension plans in 2013, for a total of $365, and an additional $310 to it other postretirement benefit plan, for a total of $621.