EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Earnings Per Share, Basic and Diluted [Abstract]
Net earnings attributable to common shareholders - basic and diluted	$ 12,620	$ 10,297	$ 40,066	$ 34,790
Basic and diluted common shares outstanding [Abstract]
Weighted average common shares outstanding-basic (in shares)	6,896	7,280	6,946	7,260
Effect of dilutive shares (in shares)	64	49	67	76
Weighted average shares common outstanding-diluted (in shares)	6,960	7,329	7,013	7,336
Earnings per common share - basic (in dollars per share)	$ 1.83	$ 1.41	$ 5.77	$ 4.79
Earnings per common share - diluted (in dollars per share)	1.81	1.40	5.71	4.74
Earnings Per Share, Pro Forma [Abstract]
Basic - pro forma	0.92	0.71	2.88	2.40
Diluted - pro forma	$ 0.91	$ 0.70	$ 2.86	$ 2.37
Weighted Average Common Shares Outstanding - Pro Forma:
Basic - pro forma	13,791	14,561	13,891	14,519
Diluted - pro forma	13,920	14,659	14,026	14,672