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Retirement Plans (Tables)
3 Months Ended
Mar. 31, 2015
Compensation and Retirement Disclosure [Abstract]  
Components Of Net Periodic Pension Cost
The components of net periodic pension cost of the UK Plan for the three months ended March 31, 2015 and 2014 were as follows (in thousands): 
 
For the three months ended March 31,
 
 
2015
 
2014
 
Interest cost
$
2,865

 
$
3,498

 
Expected return on plan assets
(3,995
)
 
(4,211
)
 
Amortization of unrecognized loss
623

 
506

 
Net periodic pension cost
$
(507
)
 
$
(207
)