NET INCOME PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
NET INCOME PER SHARE [Abstract]
Income from continuing operations	$ 6,859	$ 7,954	$ 25,236	$ 22,772
Income (loss) from discontinued operations, net of tax	(15)	4	(70)	(3)
Net income	$ 6,844	$ 7,958	$ 25,166	$ 22,769
Weighted average common shares outstanding [Abstract]
Basic (in shares)	22,535,000	22,725,000	22,508,000	22,684,000
Effect of dilutive securities [Abstract]
Restricted stock units (in shares)	254,000	164,000	245,000	199,000
Warrants (in shares)	0	0	0	1,000
Diluted (in shares)	22,789,000	22,889,000	22,753,000	22,884,000
Basic [Abstract]
Continuing operations (in dollars per share)	$ 0.30	$ 0.35	$ 1.12	$ 1.00
Discontinued operations (in dollars per share)	0	0	0	0
Basic net income per share (in dollars per share)	0.30	0.35	1.12	1.00
Diluted [Abstract]
Continuing operations (in dollars per share)	0.30	0.35	1.11	1.00
Discontinued operations (in dollars per share)	0	0	0	0
Diluted net income per share (in dollars per share)	$ 0.30	$ 0.35	$ 1.11	$ 1.00
Restricted Stock Units (RSUs) [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted average number of shares underlying antidilutive securities (in shares)	0	95,000	2,000	84,000
Warrants [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted average number of shares underlying antidilutive securities (in shares)	0	0	0	0