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EMPLOYEE BENEFIT PLANS
 3 Months Ended
Mar. 31, 2018
Retirement Benefits [Abstract]  
Pension and Other Postretirement Benefits Disclosure [Text Block] EMPLOYEE BENEFIT PLANS
The Company has three frozen defined benefit pension plans covering certain employees or former employees of three U.S. subsidiaries. The Company also has pension plans covering certain employees of several foreign subsidiaries. The Company also sponsors a number of defined contribution plans in the U.S. and at foreign subsidiaries. The Company contributed approximately $0.8 million to the pension plans during the three months ended March 31, 2018, and expects to contribute approximately $4.5 million to the pension plans during the remainder of 2018.
 
The components of net periodic pension cost consisted of the following for the periods set forth below (amounts in thousands):
 
Three months ended
 
March 31,
 
2018
 
2017
Service cost
$
137

 
$
225

Interest cost
1,083

 
1,171

Expected return on assets
(1,492
)
 
(1,369
)
Amortization of unrecognized prior service cost
50

 
34

Amortization of net unrecognized loss
676

 
674

      Net periodic pension cost
$
454

 
$
735