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Retirement and Benefit Plans (Tables)
 9 Months Ended
Sep. 30, 2021
Retirement Benefits [Abstract]  
Retirement and Benefit Plans [Table Text Block] The following table presents the pension benefit costs:
 
 Three Months Ended
September 30		Nine Months Ended
September 30
 2021202020212020
 (thousands)
Service cost$— $167 $— $501 
Interest cost24 1,474 71 4,420 
Expected return on plan assets— (1,374)— (4,120)
Amortization of actuarial (gain) loss(5)202 (14)605 
Plan settlement loss— — — 86 
Net periodic benefit expense$19 $469 $57 $1,492