XML 18 R55.htm IDEA: XBRL DOCUMENT v2.4.0.8
PENSION AND POSTRETIREMENT WELFARE PLANS (Details 4) (Postretirement Welfare Plan, USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Postretirement Welfare Plan
   
Postretirement welfare plan    
Requisite service period for employees who retire after January 1, 2005 in order to be eligible for retiree medical benefits 20 years  
Change in postretirement benefit obligation:    
Benefit obligation at beginning of period $ 1,621 $ 1,378
Service cost 16 22
Interest cost 60 67
Actuarial (gain) loss (243) 227
Benefits paid (47) (73)
Benefit obligation at end of period $ 1,407 $ 1,621