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RETIREMENT AND DEFERRED COMPENSATION PLANS (Tables)
6 Months Ended
Jun. 30, 2021
Retirement Benefits [Abstract]  
Components of net periodic benefit cost
Components of Net Periodic Benefit Cost:
Domestic PlansForeign Plans
Three Months Ended June 30,2021202020212020
Service cost$3,941 $3,562 $2,071 $1,767 
Interest cost1,604 1,536 208 340 
Expected return on plan assets(3,064)(2,702)(721)(631)
Amortization of net loss2,501 1,294 591 514 
Amortization of prior service cost — 44 95 
Net periodic benefit cost$4,982 $3,690 $2,193 $2,085 
Domestic PlansForeign Plans
Six Months Ended June 30,2021202020212020
Service cost$8,168 $7,139 $4,149 $3,535 
Interest cost3,215 3,523 426 680 
Expected return on plan assets(6,137)(6,124)(1,444)(1,265)
Amortization of net loss5,004 2,842 1,180 1,028 
Amortization of prior service cost — 89 192 
Net periodic benefit cost$10,250 $7,380 $4,400 $4,170