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Statement of Comprehensive Income (Parenthetical) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Statement of Income and Comprehensive Income [Abstract]    
Tax on changes in unrealized gain (loss) $ (152) $ 18
Tax on reclassification adjustment for sales of securities included in net income $ (31) $ 17