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EMPLOYEE BENEFIT PLANS
 3 Months Ended
Mar. 31, 2013
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 four 401(k) retirement savings plans in the U.S. and a number of defined contribution plans at foreign subsidiaries. The Company contributed approximately $1.5 million to the frozen defined pension plans during the three months ended March 31, 2013 and expects to contribute approximately $5.3 million to the frozen pension plans during the remainder of 2013.

The components of net periodic pension cost consisted of the following (amounts in thousands):
 
Three months ended
 
March 31,
 
2013
 
2012
Service cost
$
172

 
$
—

Interest cost
1,355

 
1,133

Expected return on assets
(1,396
)
 
(1,252
)
Amortization of unrecognized prior service cost
34

 
34

Amortization of net unrecognized loss
1,318

 
1,293

      Net periodic pension cost
$
1,483

 
$
1,208