EARNINGS PER SHARE (Details) (USD $)	3 Months Ended			9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011		Dec. 31, 2012	Dec. 31, 2011
Weighted average number diluted shares outstanding adjustment [Abstract]
Weighted average decrease in the effect of dilutive shares (in shares)		72,000			108,000
Decrease in basic earnings per share (in dollars per shares)		$ 0.04			$ 0.08
Decrease in diluted earnings per share (in dollars per shares)		$ 0.03			$ 0.04
Basic and Diluted Shares Outstanding [Abstract]
Weighted average shares outstanding-basic (in shares)	7,843,153	7,818,666	[1]	7,778,174	8,092,404	[1]
Effect of dilutive shares (in shares)	0	79,000		90,000	92,000
Weighted average shares outstanding-diluted (in shares)	7,843,153	7,898,041	[1]	7,867,982	8,184,382	[1]
Calculation of Earnings Per Share - Basic [Abstract]
Net earnings	$ 9,033,000	$ 8,743,000	[1]	$ 27,128,000	$ 19,510,000	[1]
Net earnings attributable to shareholders with participating rights	342,000	295,000		507,000	630,000
Net earnings attributable to common share holders	8,691,000	8,448,000		26,621,000	18,880,000
Basic (in dollars per share)	$ 1.11	$ 1.08	[1]	$ 3.42	$ 2.33	[1]
Calculation of Earnings Per Share - Diluted [Abstract]
Net earnings attributable to common share holders	8,691,000	8,448,000		26,621,000	18,880,000
Add: undistributed earnings attributable to participating securities	0	2,000		1,000	7,000
Net earnings attributable to common shareholders	8,691,000	8,450,000		26,622,000	18,887,000
Diluted (in dollars per share)	$ 1.11	$ 1.07	[1]	$ 3.38	$ 2.31	[1]
Special dividend paid	$ 20,100,000

[1] See Note 2, "Restatement of Consolidated Financial Statements"