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Other Liabilities (Tables)
 9 Months Ended
Sep. 30, 2016
Other Liabilities Disclosure [Abstract]  
Other liabilities
Other liabilities consisted of the following:
(in thousands)
 
As of 
 September 30, 
 2016
 
As of 
 December 31, 
 2015
 
 
 
 
 
Employee compensation and benefits
 
$
18,536

 
$
16,808

Liability for pension benefits
 
221,110

 
221,965

Liabilities for uncertain tax positions
 
3,445

 
3,492

Other
 
21,067

 
25,302

Other liabilities (less current portion)
 
$
264,158

 
$
267,567