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Retirement and Benefit Plans (Notes)
 6 Months Ended
Jun. 30, 2021
Retirement Benefits [Abstract]  
Retirement and Benefit Plans Retirement and Benefit Plans
 
    The following table presents the pension benefit costs:
 
 Three Months Ended
June 30		Six Months Ended
June 30
 2021202020212020
 (thousands)
Service cost$— $166 $— $334 
Interest cost23 1,473 47 2,946 
Expected return on plan assets— (1,372)— (2,746)
Amortization of actuarial (gain) loss(4)201 (9)403 
Plan settlement loss— — — 86 
Net periodic benefit expense$19 $468 $38 $1,023 
     
Service cost is recorded in the same income statement line items as other employee compensation costs arising from services rendered, and the other components of net periodic benefit expense are recorded in "Pension expense (excluding service costs)" in our Consolidated Statements of Operations.

    During the six months ended June 30, 2021, we paid $0.2 million in cash to the nonqualified pension plan participants. For the remainder of 2021, we expect to make approximately $0.2 million in cash payments to our nonqualified pension plan participants.