EARNINGS PER COMMON SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Earnings Per Common Share
Net income	$ 105,206	$ 110,720	$ 322,233	$ 345,136
Average common shares issued and outstanding (in shares)	57,029,078	56,932,050	57,019,301	57,699,236
Earnings per common share (in dollars per share)	$ 1.84	$ 1.94	$ 5.65	$ 5.98
Diluted Earnings Per Common Share
Average common shares issued and outstanding (in shares)	57,029,078	56,932,050	57,019,301	57,699,236
Average dilutive common shares outstanding (in shares)	58,174,696	58,037,698	58,027,880	58,707,815
Diluted earnings per common share (in dollars per share)	$ 1.81	$ 1.91	$ 5.55	$ 5.88
Weighted average antidilutive common stock equivalents (excluded from the computation of EPS) (in shares)	11,426	723	4,668	24,524
Dilutive effect of average unvested RSUs
Diluted Earnings Per Common Share
Dilutive effect of average unvested RSUs (in shares)	1,145,618	1,105,648	1,008,579	1,008,579

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