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, Common [Member]
Balance, beginning of period (value) at Jun. 30, 2022			$ 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 equity-based payment arrangements (value)			$ 0
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 equity-based payment arrangements (value)			$ 0
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
Balance, beginning of period (value) at Jun. 30, 2023	$ 1,608,510		$ 1,041	583,836	2,855,751	(1,832,118)
Shares, beginning of period at Jun. 30, 2023			104,088,784
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued for equity-based payment arrangements (shares)			47,660
Shares issued for Employee Stock Purchase Plan (shares)			44,616
Shares issued for equity-based payment arrangements (value)			$ 1
Shares issued for Employee Stock Purchase Plan (value)			0	6,035
Tax withholding related to share-based compensation				(3,561)
Stock-based compensation expense				15,480
Net Income	193,644				193,644
Dividends					(75,722)
Purchase of treasury shares						(20,000)
Balance, end of period (value) at Dec. 31, 2023	$ 1,724,387		$ 1,042	601,790	2,973,673	(1,852,118)
Shares, end of period at Dec. 31, 2023			104,181,060
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share	$ 1.04
Balance, beginning of period (value) at Sep. 30, 2023			$ 1,041	591,458	2,919,567	(1,852,118)
Shares, beginning of period at Sep. 30, 2023			104,144,549
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued for equity-based payment arrangements (shares)			16,603
Shares issued for Employee Stock Purchase Plan (shares)			19,908
Shares issued for equity-based payment arrangements (value)			$ 1
Shares issued for Employee Stock Purchase Plan (value)			0	2,616
Tax withholding related to share-based compensation				(617)
Stock-based compensation expense				8,333
Net Income	$ 91,965				91,965
Dividends					(37,859)
Purchase of treasury shares						0
Balance, end of period (value) at Dec. 31, 2023	$ 1,724,387		$ 1,042	$ 601,790	$ 2,973,673	$ (1,852,118)
Shares, end of period at Dec. 31, 2023			104,181,060
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share	$ 0.52
Preferred Shares		0