Condensed Consolidated Statements of Changes in Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional ‎Paid-in Capital	Treasury Stock	Retained Earnings	Accumulated ‎Other ‎Comprehensive Income (Loss)
Common stock, shares outstanding, beginning balance (in shares) at Jun. 30, 2022		188,247,000
Beginning balance at Jun. 30, 2022	$ 3,360,751	$ 586	$ 1,682,432	$ (1,623,256)	$ 3,613,736	$ (312,747)
Treasury stock, common, beginning balance (in shares) at Jun. 30, 2022				(41,836,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued on exercise of options (in shares)		45,000
Common stock issued on exercise of options	2,610		2,610
Common stock issued on vesting of restricted stock units, net of shares withheld for tax (in shares)		3,000
Common stock issued on vesting of restricted stock units, net of shares withheld for tax	(59)		(59)
Stock-based compensation costs	16,919		16,919
Other comprehensive income (loss)	(93,381)					(93,381)
Net income	210,478				210,478
Dividends declared	(64,431)				(64,431)
Common stock, shares outstanding, ending balance (in shares) at Sep. 30, 2022		188,295,000
Treasury stock, common, ending balance (in shares) at Sep. 30, 2022				(41,836,000)
Ending balance at Sep. 30, 2022	3,432,887	$ 586	1,701,902	$ (1,623,256)	3,759,783	(406,128)
Common stock, shares outstanding, beginning balance (in shares) at Jun. 30, 2022		188,247,000
Beginning balance at Jun. 30, 2022	3,360,751	$ 586	1,682,432	$ (1,623,256)	3,613,736	(312,747)
Treasury stock, common, beginning balance (in shares) at Jun. 30, 2022				(41,836,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	667,892
Common stock, shares outstanding, ending balance (in shares) at Mar. 31, 2023		188,761,000
Treasury stock, common, ending balance (in shares) at Mar. 31, 2023				(41,836,000)
Ending balance at Mar. 31, 2023	3,932,509	$ 588	1,728,997	$ (1,623,256)	4,088,057	(261,877)
Common stock, shares outstanding, beginning balance (in shares) at Sep. 30, 2022		188,295,000
Beginning balance at Sep. 30, 2022	3,432,887	$ 586	1,701,902	$ (1,623,256)	3,759,783	(406,128)
Treasury stock, common, beginning balance (in shares) at Sep. 30, 2022				(41,836,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued on exercise of options (in shares)		77,000
Common stock issued on exercise of options	5,120		5,120
Common stock issued on vesting of restricted stock units, net of shares withheld for tax (in shares)		265,000
Common stock issued on vesting of restricted stock units, net of shares withheld for tax	(29,654)	$ 1	(29,655)
Common stock issued on employee stock purchase plan (shares)		100,000
Common stock issued on employee stock purchase plan	16,936	$ 1	16,935
Stock-based compensation costs	16,464		16,464
Other comprehensive income (loss)	135,960					135,960
Net income	224,914				224,914
Dividends declared	(64,500)				(64,500)
Common stock, shares outstanding, ending balance (in shares) at Dec. 31, 2022		188,737,000
Treasury stock, common, ending balance (in shares) at Dec. 31, 2022				(41,836,000)
Ending balance at Dec. 31, 2022	3,738,127	$ 588	1,710,766	$ (1,623,256)	3,920,197	(270,168)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued on exercise of options (in shares)		18,000
Common stock issued on exercise of options	983		983
Common stock issued on vesting of restricted stock units, net of shares withheld for tax (in shares)		6,000
Common stock issued on vesting of restricted stock units, net of shares withheld for tax	(584)		(584)
Stock-based compensation costs	17,832		17,832
Other comprehensive income (loss)	8,291					8,291
Net income	232,500				232,500
Dividends declared	(64,640)				(64,640)
Common stock, shares outstanding, ending balance (in shares) at Mar. 31, 2023		188,761,000
Treasury stock, common, ending balance (in shares) at Mar. 31, 2023				(41,836,000)
Ending balance at Mar. 31, 2023	$ 3,932,509	$ 588	1,728,997	$ (1,623,256)	4,088,057	(261,877)
Common stock, shares outstanding, beginning balance (in shares) at Jun. 30, 2023	147,064,349	188,901,000
Beginning balance at Jun. 30, 2023	$ 4,129,903	$ 588	1,772,083	$ (1,623,256)	4,253,016	(272,528)
Treasury stock, common, beginning balance (in shares) at Jun. 30, 2023	(41,836,234)			(41,836,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued on exercise of options (in shares)		17,000
Common stock issued on exercise of options	$ 983		983
Common stock issued on vesting of restricted stock units, net of shares withheld for tax (in shares)		3,000
Common stock issued on vesting of restricted stock units, net of shares withheld for tax	(225)		(225)
Stock-based compensation costs	18,510		18,510
Other comprehensive income (loss)	(47,620)					(47,620)
Net income	219,422				219,422
Dividends declared	(70,597)				(70,597)
Common stock, shares outstanding, ending balance (in shares) at Sep. 30, 2023		188,921,000
Treasury stock, common, ending balance (in shares) at Sep. 30, 2023				(41,836,000)
Ending balance at Sep. 30, 2023	$ 4,250,376	$ 588	1,791,351	$ (1,623,256)	4,401,841	(320,148)
Common stock, shares outstanding, beginning balance (in shares) at Jun. 30, 2023	147,064,349	188,901,000
Beginning balance at Jun. 30, 2023	$ 4,129,903	$ 588	1,772,083	$ (1,623,256)	4,253,016	(272,528)
Treasury stock, common, beginning balance (in shares) at Jun. 30, 2023	(41,836,234)			(41,836,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 728,715
Common stock, shares outstanding, ending balance (in shares) at Mar. 31, 2024	146,886,657	189,319,000
Treasury stock, common, ending balance (in shares) at Mar. 31, 2024	(42,432,422)			(42,432,000)
Ending balance at Mar. 31, 2024	$ 4,629,920	$ 588	1,847,938	$ (1,723,263)	4,769,963	(265,306)
Common stock, shares outstanding, beginning balance (in shares) at Sep. 30, 2023		188,921,000
Beginning balance at Sep. 30, 2023	4,250,376	$ 588	1,791,351	$ (1,623,256)	4,401,841	(320,148)
Treasury stock, common, beginning balance (in shares) at Sep. 30, 2023				(41,836,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued on exercise of options (in shares)		24,000
Common stock issued on exercise of options	1,557		1,557
Common stock issued on vesting of restricted stock units, net of shares withheld for tax (in shares)		163,000
Common stock issued on vesting of restricted stock units, net of shares withheld for tax	(7,797)	$ 1	(7,798)
Common stock issued on employee stock purchase plan (shares)		151,000
Common stock issued on employee stock purchase plan	17,967	$ 1	17,966
Treasury stock purchases (in shares)				(336,000)
Treasury stock purchases	(50,007)	$ (2)	2	$ (50,007)
Stock-based compensation costs	19,840		19,840
Other comprehensive income (loss)	111,796					111,796
Net income	208,800				208,800
Dividends declared	(70,678)				(70,678)
Common stock, shares outstanding, ending balance (in shares) at Dec. 31, 2023		189,259,000
Treasury stock, common, ending balance (in shares) at Dec. 31, 2023				(42,172,000)
Ending balance at Dec. 31, 2023	4,481,854	$ 588	1,822,918	$ (1,673,263)	4,539,963	(208,352)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued on exercise of options (in shares)		54,000
Common stock issued on exercise of options	4,679		4,679
Common stock issued on vesting of restricted stock units, net of shares withheld for tax (in shares)		6,000
Common stock issued on vesting of restricted stock units, net of shares withheld for tax	(314)		(314)
Common stock issued on employee stock purchase plan	213		213
Treasury stock purchases (in shares)				(260,000)
Treasury stock purchases	(50,000)			$ (50,000)
Stock-based compensation costs	20,442		20,442
Other comprehensive income (loss)	(56,954)					(56,954)
Net income	300,492				300,492
Dividends declared	$ (70,492)				(70,492)
Common stock, shares outstanding, ending balance (in shares) at Mar. 31, 2024	146,886,657	189,319,000
Treasury stock, common, ending balance (in shares) at Mar. 31, 2024	(42,432,422)			(42,432,000)
Ending balance at Mar. 31, 2024	$ 4,629,920	$ 588	$ 1,847,938	$ (1,723,263)	$ 4,769,963	$ (265,306)