INCOME PER COMMON AND COMMON EQUIVALENT 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
INCOME PER COMMON AND COMMON EQUIVALENT SHARE
Common stock equivalents excluded from diluted earnings per share as their effect is anti-dilutive (in shares)	181,000	191,000	181,000	190,000
Income Per Share - Basic:
Net income	$ 4,739	$ 6,399	$ 9,604	$ 10,601
Weighted average number of common shares outstanding - basic	7,820,000	8,364,000	7,831,000	8,609,000
Net income per share - basic (in dollars per share)	$ 0.61	$ 0.77	$ 1.23	$ 1.23
Income Per Share - Diluted:
Net income	$ 4,739	$ 6,399	$ 9,604	$ 10,601
Weighted average number of common shares outstanding	7,820,000	8,364,000	7,831,000	8,609,000
Assumed exercise of stock options and restricted stock units, using the treasury stock method (in shares)	31,000	54,000	35,000	53,000
Weighted average number of common and potential common shares outstanding - diluted	7,851,000	8,418,000	7,866,000	8,662,000
Net income per share - diluted (in dollars per share)	$ 0.60	$ 0.76	$ 1.22	$ 1.22