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ACCUMULATED OTHER COMPREHENSIVE INCOME OR LOSS (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward]    
Balance at beginning of period $ 155 $ (2,807)
Other comprehensive income before Reclassification 544 (43)
Amounts reclassified from accumulated other comprehensive income 88 227
Net current period other comprehensive income 632 184
Balance at end of period 787 (2,623)
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]    
Pension and other employee benefits 1,359 1,424
Income tax expense 951 1,171
Net of tax 2,064 2,412
Reclassification out of Accumulated Other Comprehensive Income [Member]
    
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]    
Net of tax 88 (227)
Unrealized Gains and Losses on Securities Available for Sale [Member]
    
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward]    
Balance at beginning of period 6,043 8,023
Other comprehensive income before Reclassification 544 (43)
Amounts reclassified from accumulated other comprehensive income 0 0
Net current period other comprehensive income 544 (43)
Balance at end of period 6,587 7,980
Unrealized Gains and Losses on Securities Available for Sale [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
    
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]    
Total impairment losses 0 0
Net gain on securities transactions 0 0
Income tax expense 0 0
Net of tax 0 0
Defined Benefit and Other Benefit Plans [Member]
    
Accumulated Other Comprehensive Income Loss Net Of Tax [Roll Forward]    
Balance at beginning of period (5,888) (10,830)
Other comprehensive income before Reclassification 0 0
Amounts reclassified from accumulated other comprehensive income 88 227
Net current period other comprehensive income 88 227
Balance at end of period (5,800) (10,603)
Defined Benefit and Other Benefit Plans [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
    
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]    
Income tax expense 55 142
Net of tax 88 (227)
Prior Service Costs [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
    
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]    
Pension and other employee benefits 22 [1] 21 [1]
Actuarial Losses [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
    
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]    
Pension and other employee benefits $ (165) [1] $ (390) [1]
[1] These accumulated other comprehensive income components are included in the computation of net periodic pension and other benefit plan costs (see Note 9 for additional information).