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 (shares) at Jun. 30, 2021		187,485,000
Beginning balance at Jun. 30, 2021	$ 2,885,679	$ 583	$ 1,622,199	$ (1,623,256)	$ 3,079,640	$ (193,487)
Treasury stock, common, beginning balance (shares) at Jun. 30, 2021				(41,836,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued on exercise of options (shares)		61,000
Common stock issued on exercise of options	4,354		4,354
Common stock issued on vesting of restricted stock units, net of shares withheld for tax (shares)		1,000
Common stock issued on vesting of restricted stock units, net of shares withheld for tax	(195)		(195)
Stock-based compensation costs	17,303		17,303
Other comprehensive income (loss)	(23,516)					(23,516)
Net income	203,613				203,613
Dividends declared	(61,189)				(61,189)
Common stock, shares outstanding, ending balance (shares) at Sep. 30, 2021		187,547,000
Ending balance at Sep. 30, 2021	3,026,049	$ 583	1,643,661	$ (1,623,256)	3,222,064	(217,003)
Treasury stock, common, ending balance (shares) at Sep. 30, 2021				(41,836,000)
Common stock, shares outstanding, beginning balance (shares) at Jun. 30, 2021		187,485,000
Beginning balance at Jun. 30, 2021	2,885,679	$ 583	1,622,199	$ (1,623,256)	3,079,640	(193,487)
Treasury stock, common, beginning balance (shares) at Jun. 30, 2021				(41,836,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	405,364
Common stock, shares outstanding, ending balance (shares) at Dec. 31, 2021		188,048,000
Ending balance at Dec. 31, 2021	3,145,835	$ 585	1,629,031	$ (1,623,256)	3,362,570	(223,095)
Treasury stock, common, ending balance (shares) at Dec. 31, 2021				(41,836,000)
Common stock, shares outstanding, beginning balance (shares) at Sep. 30, 2021		187,547,000
Beginning balance at Sep. 30, 2021	3,026,049	$ 583	1,643,661	$ (1,623,256)	3,222,064	(217,003)
Treasury stock, common, beginning balance (shares) at Sep. 30, 2021				(41,836,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued on exercise of options (shares)		39,000
Common stock issued on exercise of options	2,378		2,378
Common stock issued on vesting of restricted stock units, net of shares withheld for tax (shares)		361,000
Common stock issued on vesting of restricted stock units, net of shares withheld for tax	(49,830)	$ 2	(49,832)
Common stock issued on employee stock purchase plan (shares)		101,000
Common stock issued on employee stock purchase plan	16,723		16,723
Stock-based compensation costs	16,101		16,101
Other comprehensive income (loss)	(6,092)					(6,092)
Net income	201,751				201,751
Dividends declared	(61,245)				(61,245)
Common stock, shares outstanding, ending balance (shares) at Dec. 31, 2021		188,048,000
Ending balance at Dec. 31, 2021	$ 3,145,835	$ 585	1,629,031	$ (1,623,256)	3,362,570	(223,095)
Treasury stock, common, ending balance (shares) at Dec. 31, 2021				(41,836,000)
Common stock, shares outstanding, beginning balance (shares) at Jun. 30, 2022	146,410,721	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 (shares) at Jun. 30, 2022	(41,836,234)			(41,836,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued on exercise of options (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 (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 (shares) at Sep. 30, 2022		188,295,000
Ending balance at Sep. 30, 2022	$ 3,432,887	$ 586	1,701,902	$ (1,623,256)	3,759,783	(406,128)
Treasury stock, common, ending balance (shares) at Sep. 30, 2022				(41,836,000)
Common stock, shares outstanding, beginning balance (shares) at Jun. 30, 2022	146,410,721	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 (shares) at Jun. 30, 2022	(41,836,234)			(41,836,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 435,392
Common stock, shares outstanding, ending balance (shares) at Dec. 31, 2022	146,901,134	188,737,000
Ending balance at Dec. 31, 2022	$ 3,738,127	$ 588	1,710,766	$ (1,623,256)	3,920,197	(270,168)
Treasury stock, common, ending balance (shares) at Dec. 31, 2022	(41,836,234)			(41,836,000)
Common stock, shares outstanding, beginning balance (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 (shares) at Sep. 30, 2022				(41,836,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued on exercise of options (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 (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 (shares) at Dec. 31, 2022	146,901,134	188,737,000
Ending balance at Dec. 31, 2022	$ 3,738,127	$ 588	$ 1,710,766	$ (1,623,256)	$ 3,920,197	$ (270,168)
Treasury stock, common, ending balance (shares) at Dec. 31, 2022	(41,836,234)			(41,836,000)