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Net Income Per Common Share (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Net Income Per Common Share    
Net income available for shareholders $ 2,099 $ 1,679
Weighted average outstanding shares of common stock 3,337,000 3,274,000
Dilutive effect of stock options (in shares) 204,000 140,000
Common stock and equivalents (in shares) 3,541,000 3,414,000
Earnings per share:    
Basic (in dollars per share) $ 0.63 $ 0.51
Diluted (in dollars per share) $ 0.59 $ 0.49
Anti-dilutive stock options excluded from the calculation of diluted earnings per share (in shares) 101,433