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ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME - Summary of accumulated other comprehensive (loss) income (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Accumulated Other Comprehensive Income Loss Defined Benefit Pension and Other Postretirement Plans Net Of Tax [Roll Forward]    
Balance $ (1,666) $ (1,162)
Change during period:    
Before-tax amount (163) (782)
Tax (provision) benefit 58 278
Reclassification adjustment, net of taxes      
Total activity in period (105) (504)
Balance (1,771) (1,666)
Accumulated Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax [Roll Forward]    
Balance 208 166
Change during period:    
Before-tax amount 277 129
Tax (provision) benefit (99) (46)
Reclassification adjustment, net of taxes (187) (41)
Total activity in period (9) 42
Balance 199 208
Increase (Decrease) In Accumulated Other Comprehensive Income (Loss), Net Of Tax 2 [Roll Forward]    
Balance (1,458) (996)
Change during period:    
Before-tax amount 114 (653)
Tax (provision) benefit (41) 232
Total activity in period (187) (41)
Reclassification adjustment, net of taxes (114) (462)
Balance $ (1,572) $ (1,458)