Condensed Statements of Shareholder's Equity Condensed Statements of Shareholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Common Stock [Member] Stock Options and Stock Appreciation Rights [ Member]	Common Stock [Member] Performance Shares [Member]	Common Stock [Member] Restricted Stock Units (RSUs) [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] Stock Options and Stock Appreciation Rights [ Member]	Additional Paid-in Capital [Member] Performance Shares [Member]	Additional Paid-in Capital [Member] Restricted Stock Units (RSUs) [Member]	Retained Earnings [Member]	Treasury Shares- at Cost	Treasury Shares- at Cost Stock Options and Stock Appreciation Rights [ Member]	Treasury Shares- at Cost Performance Shares [Member]	Treasury Shares- at Cost Restricted Stock Units (RSUs) [Member]	Total Accumulated Other Comprehensive Income (Loss) [Member]	Parent [Member]	Parent [Member] Stock Options and Stock Appreciation Rights [ Member]	Parent [Member] Performance Shares [Member]	Parent [Member] Restricted Stock Units (RSUs) [Member]
Beginning balance, shares at Jun. 30, 2023		38,657
Beginning balance at Jun. 30, 2023		$ 10,000				$ 188,646				$ 1,792,632	$ (477,545)				$ (55,296)	$ 1,458,437
Net income	$ 93,826															93,826
Other comprehensive (loss) income															(7,074)	(7,074)
Cash Dividends per Common Share	$ 0.35
Cash dividends										(23)						(23)
Exercise of stock appreciation rights, shares			32
Performance share awards, shares				54
Restricted stock units, shares					13
Additional Paid in Capital, Exercise of stock appreciation rights, Performance share awards, Restricted stock units							$ (1,681)	$ (3,072)	$ (726)
Exercise of stock appreciation rights and options												$ (1,912)
Performance share awards													$ (3,487)
Restricted stock units														$ (910)
Total Shareholders' Equity, Exercise of stock appreciation rights, Performance share awards, Restricted stock units																	$ (3,593)	$ (6,559)	$ (1,636)
Compensation expense						1,976	844									1,976	844
Stockholders' Equity, Other Shares		(1)
Other						(1)				(3)	(78)					(82)
Ending balance, shares at Sep. 30, 2023		38,755
Ending balance at Sep. 30, 2023		$ 10,000				185,986				1,886,432	(483,932)				(62,370)	1,536,116
Beginning balance, shares at Jun. 30, 2023		38,657
Beginning balance at Jun. 30, 2023		$ 10,000				188,646				1,792,632	(477,545)				(55,296)	1,458,437
Net income	$ 282,271
Other comprehensive (loss) income	(9,193)														(9,193)
Ending balance, shares at Mar. 31, 2024		38,640
Ending balance at Mar. 31, 2024		$ 10,000				191,133				2,046,956	(514,576)				(64,489)	1,669,024
Beginning balance, shares at Sep. 30, 2023		38,755
Beginning balance at Sep. 30, 2023		$ 10,000				185,986				1,886,432	(483,932)				(62,370)	1,536,116
Net income	$ 91,228															91,228
Other comprehensive (loss) income															2,724	2,724
Cash Dividends per Common Share	$ 0.35
Cash dividends										(13,607)						(13,607)
Treasury Stock, Shares, Acquired		(63)
Treasury Stock, Value, Acquired, Cost Method											(10,677)					(10,677)
Exercise of stock appreciation rights, shares			11
Restricted stock units, shares					1
Additional Paid in Capital, Exercise of stock appreciation rights, Performance share awards, Restricted stock units							(391)		(86)
Exercise of stock appreciation rights and options												(335)
Restricted stock units														(108)
Total Shareholders' Equity, Exercise of stock appreciation rights, Performance share awards, Restricted stock units																	(726)		(194)
Compensation expense						2,261	866									2,261	866
Stockholders' Equity, Other Shares		1
Other										37						37
Ending balance, shares at Dec. 31, 2023		38,705
Ending balance at Dec. 31, 2023		$ 10,000				188,636				1,964,090	(495,052)				(59,646)	1,608,028
Net income	$ 97,217															97,217
Other comprehensive (loss) income	$ (4,843)														(4,843)	(4,843)
Cash Dividends per Common Share	$ 0.37
Cash dividends										(14,360)						(14,360)
Treasury Stock, Shares, Acquired		(100)
Treasury Stock, Value, Acquired, Cost Method											(18,198)					(18,198)
Exercise of stock appreciation rights, shares			27
Restricted stock units, shares					1
Additional Paid in Capital, Exercise of stock appreciation rights, Performance share awards, Restricted stock units							(1,365)		(47)
Exercise of stock appreciation rights and options												(1,495)
Restricted stock units														(53)
Total Shareholders' Equity, Exercise of stock appreciation rights, Performance share awards, Restricted stock units																	(2,860)		(100)
Compensation expense						3,271	860									3,271	860
Stockholders' Equity, Other Shares		7
Other						(222)				9	222					9
Ending balance, shares at Mar. 31, 2024		38,640
Ending balance at Mar. 31, 2024		$ 10,000				191,133				2,046,956	(514,576)				(64,489)	1,669,024
Beginning balance, shares at Jun. 30, 2024		38,409
Beginning balance at Jun. 30, 2024	$ 1,688,781	$ 10,000				193,778				2,121,838	(559,269)				(77,566)	1,688,781
Net income	$ 92,063															92,063
Other comprehensive (loss) income															(8,942)	(8,942)
Cash Dividends per Common Share	$ 0.37
Cash dividends										(9)						(9)
Treasury Stock, Shares, Acquired		(52)
Treasury Stock, Value, Acquired, Cost Method											(10,479)					(10,479)
Exercise of stock appreciation rights, shares			19
Performance share awards, shares				34
Restricted stock units, shares					37
Additional Paid in Capital, Exercise of stock appreciation rights, Performance share awards, Restricted stock units							(1,106)	$ (2,213)	(2,123)
Exercise of stock appreciation rights and options												(1,339)
Performance share awards													$ (3,294)
Restricted stock units														(2,136)
Total Shareholders' Equity, Exercise of stock appreciation rights, Performance share awards, Restricted stock units																	(2,445)	$ (5,507)	(4,259)
Compensation expense						1,675	1,326									1,675	1,326
Stockholders' Equity, Other Shares		(1)
Other						(12)				(24)	(91)					(127)
Ending balance, shares at Sep. 30, 2024		38,446
Ending balance at Sep. 30, 2024		$ 10,000				191,325				2,213,868	(576,608)				(86,508)	1,752,077
Beginning balance, shares at Jun. 30, 2024		38,409
Beginning balance at Jun. 30, 2024	$ 1,688,781	$ 10,000				193,778				2,121,838	(559,269)				(77,566)	1,688,781
Net income	285,152
Other comprehensive (loss) income	(29,196)														(29,196)
Ending balance, shares at Mar. 31, 2025		38,188
Ending balance at Mar. 31, 2025	1,827,481	$ 10,000				196,610				2,375,017	(647,384)				(106,762)	1,827,481
Beginning balance, shares at Sep. 30, 2024		38,446
Beginning balance at Sep. 30, 2024		$ 10,000				191,325				2,213,868	(576,608)				(86,508)	1,752,077
Net income	$ 93,290															93,290
Other comprehensive (loss) income															(19,326)	(19,326)
Cash Dividends per Common Share	$ 0.37
Cash dividends										(14,253)						(14,253)
Treasury Stock, Shares, Acquired		(75)
Treasury Stock, Value, Acquired, Cost Method											(20,103)					(20,103)
Exercise of stock appreciation rights, shares			6
Additional Paid in Capital, Exercise of stock appreciation rights, Performance share awards, Restricted stock units							(321)
Exercise of stock appreciation rights and options												(402)
Total Shareholders' Equity, Exercise of stock appreciation rights, Performance share awards, Restricted stock units																	(723)
Compensation expense						1,426	1,127									1,426	1,127
Other										(3)						(3)
Ending balance, shares at Dec. 31, 2024		38,377
Ending balance at Dec. 31, 2024		$ 10,000				193,557				2,292,902	(597,113)				(105,834)	1,793,512
Net income	$ 99,799															99,799
Other comprehensive (loss) income	$ (928)														(928)	(928)
Cash Dividends per Common Share	$ 0.46
Cash dividends										(17,683)						(17,683)
Treasury Stock, Shares, Acquired		(205)
Treasury Stock, Value, Acquired, Cost Method											(49,765)					(49,765)
Exercise of stock appreciation rights, shares			8
Restricted stock units, shares					3
Additional Paid in Capital, Exercise of stock appreciation rights, Performance share awards, Restricted stock units							(495)		$ (118)
Exercise of stock appreciation rights and options												$ (739)
Restricted stock units														$ 57
Total Shareholders' Equity, Exercise of stock appreciation rights, Performance share awards, Restricted stock units																	(1,234)		$ (61)
Compensation expense						2,723	$ 1,117									2,723	$ 1,117
Stockholders' Equity, Other Shares		5
Other						(174)				(1)	176					1
Ending balance, shares at Mar. 31, 2025		38,188
Ending balance at Mar. 31, 2025	$ 1,827,481	$ 10,000				$ 196,610				$ 2,375,017	$ (647,384)				$ (106,762)	$ 1,827,481