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RETIREMENT AND POSTRETIREMENT BENEFIT PLANS (Tables)
 3 Months Ended
Mar. 31, 2014
Compensation and Retirement Disclosure [Abstract]  
Components of total pension cost
The components of total pension cost were as follows:
 
 
Three Months Ended March 31,
 
 
2014
 
2013
Service cost
 
$
5,063

 
$
5,675

Interest cost
 
10,662

 
9,390

Expected return on plan assets
 
(17,021
)
 
(15,404
)
Amortization of prior service cost
 
(155
)
 
(153
)
Amortization of net loss
 
4,222

 
8,111

Defined benefit plans
 
2,771

 
7,619

Multi-employer plans
 
264

 
239

Defined contribution plans
 
2,834

 
2,589

Total pension cost
 
$
5,869

 
$
10,447