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Pension Plan
6 Months Ended
Jun. 30, 2020
Retirement Benefits [Abstract]  
Pension Plan Pension Plan
Net periodic pension cost consists of the following: 

Three Months Ended June 30,Six Months Ended June 30,
 2020201920202019
Service cost$179  $253  $358  $506  
Interest cost on projected benefit obligation639  782  1,278  1,564  
Expected return on plan assets(1,255) (1,181) (2,510) (2,362) 
Net amortization and deferral705  720  1,410  1,440  
Net periodic pension cost$268  $574  $536  $1,148  
 
We do not expect to make any pension contributions during 2020. Non-service cost of $0.1 million and $0.3 million for the three months ended June 30, 2020 and 2019, respectively, and $0.2 million and $0.6 million for the six months ended June 30, 2020 and 2019, respectively, are included in other expense in the consolidated condensed statements of comprehensive income (loss).