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ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Change in accumulated other comprehensive loss        
Balance at the beginning of the period     $ (127)  
Other comprehensive income 7 11 15 21
Balance at the end of the period (112)   (112)  
Net tax benefit 1,133 386 2,150 1,339
Defined benefit pension plans
       
Change in accumulated other comprehensive loss        
Balance at the beginning of the period     (127)  
Amounts reclassified from accumulated other comprehensive loss     15  
Other comprehensive income     15  
Balance at the end of the period (112)   (112)  
Defined benefit pension plans | Reclassified from accumulated other comprehensive loss
       
Change in accumulated other comprehensive loss        
Net tax benefit     $ 0