SHARE-BASED COMPENSATION (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Additional Disclosures [Abstract]
Vested share-based awards withheld to satisfy income tax obligations (in shares)			57,725	59,472
Vested share-based awards withheld to satisfy income tax obligations			$ 4,400	$ 2,600
Compensation Expense [Abstract]
Share-based compensation expense	$ 1,700	$ 1,500	4,856	4,520
401 (k) Profit Sharing Plan [Abstract]
Contribution to profit sharing plan	$ 500	$ 500	$ 1,600	$ 1,200
Restricted Stock [Member]
Number of Shares [Roll Forward]
Nonvested at beginning of period (in shares)			371,689
Granted (in shares)			72,375
Vested (in shares)			(156,240)
Forfeited (in shares)			(4,108)
Nonvested at end of period (in shares)	283,716		283,716
Weighted Average Grant-date Fair Value [Roll Forward]
Nonvested at beginning of period (in dollars per share)			$ 40.45
Granted (in dollars per share)			80.25
Vested (in dollars per share)			38.52
Forfeited (in dollars per share)			39.37
Nonvested at end of period (in dollars per share)	$ 51.68		$ 51.68
Compensation Expense [Abstract]
Unrecognized compensation expense	$ 11,100		$ 11,100
Unrecognized compensation expense, period for recognition			30 months
2008 Director LTIP [Member] | Restricted Stock [Member]
Number of Shares [Roll Forward]
Granted (in shares)			535	10,990
2017 Director LTIP [Member] | Restricted Stock [Member]
Number of Shares [Roll Forward]
Granted (in shares)			5,112
2012 Employee LTIP [Member] | Restricted Stock [Member]
Number of Shares [Roll Forward]
Granted (in shares)			66,530	134,538
Additional Disclosures [Abstract]
Vested share-based awards withheld to satisfy income tax obligations (in shares)			57,725
Vested share-based awards withheld to satisfy income tax obligations			$ 4,400