EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share, Basic and Diluted [Abstract]
Net earnings attributable to common shareholders - basic and diluted	$ 21,638	$ 19,846	$ 17,360	$ 19,550	$ 20,098	$ 16,188	$ 58,844	$ 55,836
Basic and diluted common shares outstanding [Abstract]
Weighted average common shares outstanding - basic (in shares)	13,332			13,320			13,342	13,329
Effect of dilutive shares (in shares)	46			58			60	81
Weighted average shares common outstanding - diluted (in shares)	13,378			13,378			13,402	13,410
Earnings per common share - basic (in dollars per share)	$ 1.62			$ 1.47			$ 4.41	$ 4.19
Earnings per common share - diluted (in dollars per share)	$ 1.62			$ 1.46			$ 4.39	$ 4.16