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EARNINGS PER SHARE (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 6 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Weighted average number diluted shares outstanding adjustment [Abstract]        
Weighted average decrease in the effect of dilutive shares (in shares) 74,000   91,000  
Decrease in basic earnings per share (in dollars per shares) $ 0.03   $ 0.07  
Decrease in diluted earnings per share (in dollars per shares) $ 0.02   $ 0.04  
Restricted stock awards that contain non-forfeitable rights to dividends (in shares)     45,000  
Basic and Diluted Shares Outstanding [Abstract]        
Weighted average shares outstanding-basic (in shares) 7,975,590 7,770,206 7,944,932 7,745,506
Effect of dilutive shares (in shares) 44,000 77,000 62,000 77,000
Weighted average shares outstanding-diluted (in shares) 8,019,557 7,847,227 8,006,572 7,822,079
Calculation of Earnings Per Share - Basic [Abstract]        
Net earnings $ 8,591 $ 10,033 $ 16,441 $ 18,095
Net earnings attributable to shareholders with participating rights 66 234 192 497
Net earnings attributable to common share holders 8,525 9,799 16,249 17,598
Earnings per share - basic (in dollars per share) $ 1.07 $ 1.26 $ 2.05 $ 2.27
Calculation of Earnings Per Share - Diluted [Abstract]        
Add: undistributed earnings attributable to participating securities 0 2 1 5
Net earnings attributable to common shareholders $ 8,525 $ 9,801 $ 16,250 $ 17,603
Earnings per share - diluted (in dollars per share) $ 1.06 $ 1.25 $ 2.03 $ 2.25