EARNINGS PER COMMON SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Common Share
Net income	$ 61,823	$ 53,645	$ 182,820	$ 161,452
Preferred stock dividends	0	0	0	(103)
Preferred stock redemption charge	0	0	0	(87)
Net income attributable to common stockholders	$ 61,823	$ 53,645	$ 182,820	$ 161,262
Average common shares outstanding (in shares)	59,542,128	59,118,884	59,476,488	59,225,409
Total qualifying shares (in shares)	59,542,128	59,118,884	59,476,488	59,225,409
Basic earnings per common share (in dollars per share)	$ 1.04	$ 0.91	$ 3.07	$ 2.72
Diluted Earnings Per Common Share
Net income attributable to common stockholders	$ 61,823	$ 53,645	$ 182,820	$ 161,262
Average common shares issued and outstanding (in shares)	59,542,128	59,118,884	59,476,488	59,225,409
Total dilutive common shares outstanding (in shares)	60,611,959	60,482,733	60,605,486	60,453,220
Diluted earnings per common share (in dollars per share)	$ 1.02	$ 0.89	$ 3.02	$ 2.67
RSUs
Diluted Earnings Per Common Share
Dilutive effect of average unvested RSUs (in shares)	1,069,831	1,363,849	1,128,998	1,227,811