NET INCOME PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
NET INCOME PER SHARE [Abstract]
Income from continuing operations	$ 6,601	$ 11,487	$ 12,931	$ 18,377
Loss from discontinued operations, net of tax	0	(55)	0	(55)
Net income	$ 6,601	$ 11,432	$ 12,931	$ 18,322
Weighted average common shares outstanding [Abstract]
Basic (in shares)	22,679,000	22,522,000	22,648,000	22,494,000
Effect of dilutive securities [Abstract]
Restricted stock units (in shares)	318,000	223,000	343,000	226,000
Diluted (in shares)	22,997,000	22,745,000	22,991,000	22,720,000
Basic [Abstract]
Continuing operations (in dollars per share)	$ 0.29	$ 0.51	$ 0.57	$ 0.82
Discontinued operations (in dollars per share)	0	0	0	(0.01)
Basic net income per share (in dollars per share)	0.29	0.51	0.57	0.81
Diluted [Abstract]
Continuing operations (in dollars per share)	0.29	0.51	0.56	0.81
Discontinued operations (in dollars per share)	0	(0.01)	0	0
Diluted net income per share (in dollars per share)	$ 0.29	$ 0.50	$ 0.56	$ 0.81
Restricted Stock Units (RSUs) [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of shares underlying antidilutive securities (in shares)	76,000	82,000	5,000	85,000