CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY Statement - USD ($) $ in Thousands	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]
Balance, beginning of period (value) at Jun. 30, 2021			$ 1,038	$ 518,960	$ 2,412,496	$ (1,613,202)
Shares, beginning of period at Jun. 30, 2021			103,795,169
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued for equity-based payment arrangements (shares)			26,533
Shares issued for Employee Stock Purchase Plan (shares)			38,544
Shares issued for Employee Stock Purchase Plan (value)			$ 1	6,476
Tax withholding related to share-based compensation				(1,998)
Stock-based compensation expense				12,055
Net Income	$ 197,783				197,783
Dividends					(67,696)
Purchase of treasury shares						(193,917)
Balance, end of period (value) at Dec. 31, 2021	$ 1,271,996		$ 1,039	535,493	2,542,583	(1,807,119)
Shares, end of period at Dec. 31, 2021			103,860,246
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share	$ 0.92
Balance, beginning of period (value) at Sep. 30, 2021			$ 1,038	527,255	2,480,574	(1,613,202)
Shares, beginning of period at Sep. 30, 2021			103,822,265
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued for equity-based payment arrangements (shares)			21,101
Shares issued for Employee Stock Purchase Plan (shares)			16,880
Shares issued for Employee Stock Purchase Plan (value)			$ 1	2,739
Tax withholding related to share-based compensation				(1,046)
Stock-based compensation expense				6,545
Net Income	$ 95,670				95,670
Dividends					(33,661)
Purchase of treasury shares						(193,917)
Balance, end of period (value) at Dec. 31, 2021	$ 1,271,996		$ 1,039	535,493	2,542,583	(1,807,119)
Shares, end of period at Dec. 31, 2021			103,860,246
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share	$ 0.46
Preferred Shares		0
Balance, beginning of period (value) at Jun. 30, 2022	$ 1,381,623		$ 1,039	551,360	2,636,342	(1,807,118)
Shares, beginning of period at Jun. 30, 2022			103,921,724
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued for equity-based payment arrangements (shares)			70,084
Shares issued for Employee Stock Purchase Plan (shares)			35,200
Shares issued for Employee Stock Purchase Plan (value)			$ 1	6,686
Tax withholding related to share-based compensation				(6,731)
Stock-based compensation expense				13,541
Net Income	187,324				187,324
Dividends					(71,454)
Purchase of treasury shares						0
Balance, end of period (value) at Dec. 31, 2022	$ 1,510,990		$ 1,040	564,856	2,752,212	(1,807,118)
Shares, end of period at Dec. 31, 2022			104,027,008
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share	$ 0.98
Balance, beginning of period (value) at Sep. 30, 2022			$ 1,040	560,034	2,707,182	(1,807,118)
Shares, beginning of period at Sep. 30, 2022			103,953,128
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued for equity-based payment arrangements (shares)			57,943
Shares issued for Employee Stock Purchase Plan (shares)			15,937
Shares issued for Employee Stock Purchase Plan (value)			$ 0	2,884
Tax withholding related to share-based compensation				(5,174)
Stock-based compensation expense				7,112
Net Income	$ 80,775				80,775
Dividends					(35,745)
Purchase of treasury shares						0
Balance, end of period (value) at Dec. 31, 2022	$ 1,510,990		$ 1,040	$ 564,856	$ 2,752,212	$ (1,807,118)
Shares, end of period at Dec. 31, 2022			104,027,008
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share	$ 0.49
Preferred Shares		0