EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Earnings Per Share, Basic and Diluted [Abstract]
Net earnings attributable to common shareholders - basic and diluted	$ 15,273	$ 13,423
Basic and diluted common shares outstanding [Abstract]
Weighted average common shares outstanding - basic (in shares)	13,434	13,806
Effect of dilutive shares (in shares)	163	213
Weighted average shares common outstanding - diluted (in shares)	13,597	14,019
Earnings per common share - basic (in dollars per share)	$ 1.14	$ 0.97
Earnings per common share - diluted (in dollars per share)	$ 1.12	$ 0.96