SHARE-BASED COMPENSATION (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Additional Disclosures [Abstract]
Vested share-based awards withheld to satisfy income tax obligations (in shares)			41,817	40,092
Vested share-based awards withheld to satisfy income tax obligations			$ 3,000	$ 3,900
Compensation Expense [Abstract]
Share-based compensation expense	$ 2,000	$ 1,900	6,019	5,418
401(k) Profit Sharing Plan [Abstract]
Contribution to profit sharing plan	$ 800	$ 700	$ 2,200	$ 1,800
Restricted Stock [Member]
Number of Shares [Roll Forward]
Nonvested at beginning of period (in shares)			224,000
Granted (in shares)			93,778
Vested (in shares)			(123,250)
Forfeited (in shares)			(1,189)
Nonvested at end of period (in shares)	193,339		193,339
Weighted Average Grant-date Fair Value [Roll Forward]
Nonvested at beginning of period (in dollars per share)			$ 67.70
Granted (in dollars per share)			72.90
Vested (in dollars per share)			62.07
Forfeited (in dollars per share)			81.84
Nonvested at end of period (in dollars per share)	$ 73.73		$ 73.73
Compensation Expense [Abstract]
Unrecognized compensation expense	$ 10,100		$ 10,100
Unrecognized compensation expense, period for recognition			30 months
2017 Director LTIP [Member] | Restricted Stock [Member]
Number of Shares [Roll Forward]
Granted (in shares)			8,646	8,531
2012 Employee LTIP [Member] | Restricted Stock [Member]
Number of Shares [Roll Forward]
Granted (in shares)			85,132	69,847
Additional Disclosures [Abstract]
Vested share-based awards withheld to satisfy income tax obligations (in shares)			41,817
Vested share-based awards withheld to satisfy income tax obligations			$ 3,000