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COMPREHENSIVE INCOME - Components of accumulated other comprehensive losses (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Mar. 31, 2012
Equity [Abstract]    
Unrealized gains (losses) on securities available-for-sale, net of tax $ 2,671 $ 1,839
Unrecognized pension plan expense, net of tax (469) (2,033)
Accumulated other comprehensive income (loss), net $ 2,202 $ (194)