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EMPLOYEE BENEFIT PLANS
 6 Months Ended
Jun. 30, 2016
EMPLOYEE BENEFIT PLANS [Abstract]  
Compensation and Retirement Disclosure [Abstract]
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 $1.9 million to the pension plans during the six months ended June 30, 2016, and expects to contribute approximately $2.3 million to the pension plans during the remainder of 2016.
 
The components of net periodic pension cost consisted of the following (amounts in thousands):
 
Three months ended
 
Six months ended
 
June 30,
 
June 30,
 
2016
 
2015
 
2016
 
2015
Service cost
$
206

 
$
179

 
$
312

 
$
172

Interest cost
1,233

 
1,306

 
2,470

 
1,224

Expected return on assets
(1,395
)
 
(1,531
)
 
(2,788
)
 
(1,519
)
Amortization of unrecognized prior service cost
34

 
34

 
68

 
34

Amortization of net unrecognized loss
762

 
729

 
1,527

 
729

      Net periodic pension cost
$
840

 
$
717

 
$
1,589

 
$
640