EARNINGS PER SHARE, Calculation of Basic and Diluted Earnings per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2021	Dec. 31, 2020
Earnings Per Share, Basic and Diluted [Abstract]
Net earnings attributable to common shareholders - basic and diluted	$ 26,424	$ 31,413	$ 23,518	$ 21,638	$ 19,846	$ 17,360	$ 81,355	$ 58,844
Basic and diluted common shares outstanding [Abstract]
Weighted average common shares outstanding - basic (in shares)	26,668			26,664			26,666	26,684
Effect of dilutive shares (in shares)	262			92			221	120
Weighted average shares common outstanding - diluted (in shares)	26,930			26,756			26,887	26,804
Earnings per common share - basic (in dollars per share)	$ 0.99			$ 0.81			$ 3.05	$ 2.21
Earnings per common share - diluted (in dollars per share)	$ 0.98			$ 0.81			$ 3.03	$ 2.20