EARNINGS PER SHARE (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
EARNINGS PER SHARE [Abstract]
Net earnings available to common shareholders-basic and diluted	$ 8,062	$ 3,703
Weighted average shares outstanding-basic (In shares)	7,720,535	8,307,389
Effect of dilutive shares (In shares)	177,000	182,000
Weighted average shares outstanding-diluted (In shares)	7,897,906	8,489,703
Earnings per common share:
Basic (In dollars per share)	$ 1.04	$ 0.45
Diluted (In dollars per share)	$ 1.02	$ 0.44