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Basis of Presentation - Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Per Share Computations
Net income available to common stockholders	$ 41,134	$ 34,043	$ 96,889	$ 83,475
Weighted average shares outstanding-basic	16,781	17,042	16,749	16,954
Dilutive effect of equity awards	378	383	340	347
Weighted average shares outstanding-diluted	17,159	17,425	17,089	17,301
Basic earnings per share	$ 2.45	$ 2	$ 5.78	$ 4.92
Diluted earnings per share	$ 2.4	$ 1.95	$ 5.67	$ 4.82
Shares excluded from diluted earnings per share due to their anti-dilutive effect	16	22	10	11
Convertible Senior Notes Due 2029
Per Share Computations
Interest rate (as a percentage)	2.25%		2.25%
Conversion price	$ 191.98		$ 191.98

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