CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Preferred stock	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of ASC 606 adoption					$ 83,874
Balance, beginning of year (value) at Jun. 30, 2016			$ 1,029	$ 440,123	1,431,192	$ (876,134)
Shares, beginning of year at Jun. 30, 2016			102,903,971
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued for equity-based payment arrangements (value)			$ 1	(1)
Shares issued for equity-based payment arrangements (shares)			98,781
Tax withholding related to share based compensation				(5,479)
Shares issued for Employee Stock Purchase Plan (value)			$ 1	6,244
Shares issued for Employee Stock Purchase Plan (shares)			80,547
Stock-based compensation expense (value)				11,129
NET INCOME	$ 229,561				229,561
Dividends					(91,707)
Purchase of treasury shares						(130,140)
Balance, end of year (value) at Jun. 30, 2017	$ 1,099,693		$ 1,031	452,016	1,652,920	(1,006,274)
Shares, end of year at Jun. 30, 2017			103,083,299
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share	$ 1.18
Cumulative effect of ASC 606 adoption					0
Shares issued for equity-based payment arrangements (value)			$ 1	174
Shares issued for equity-based payment arrangements (shares)			118,865
Tax withholding related to share based compensation				(7,332)
Shares issued for Employee Stock Purchase Plan (value)			$ 1	7,522
Shares issued for Employee Stock Purchase Plan (shares)			76,398
Stock-based compensation expense (value)				11,758
NET INCOME	$ 365,034				365,034
Dividends					(105,021)
Purchase of treasury shares						(48,986)
Balance, end of year (value) at Jun. 30, 2018	$ 1,322,844		$ 1,033	464,138	1,912,933	(1,055,260)
Shares, end of year at Jun. 30, 2018			103,278,562
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share	$ 1.36
Preferred Shares		0
Cumulative effect of ASC 606 adoption					0
Shares issued for equity-based payment arrangements (value)			$ 1	235
Shares issued for equity-based payment arrangements (shares)			141,071
Tax withholding related to share based compensation				(13,972)
Shares issued for Employee Stock Purchase Plan (value)			$ 1	9,039
Shares issued for Employee Stock Purchase Plan (shares)			76,393
Stock-based compensation expense (value)				12,589
NET INCOME	$ 271,885				271,885
Dividends					(118,745)
Purchase of treasury shares						(54,864)
Balance, end of year (value) at Jun. 30, 2019	$ 1,429,013		$ 1,035	$ 472,029	$ 2,066,073	$ (1,110,124)
Shares, end of year at Jun. 30, 2019			103,496,026
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share	$ 1.54
Preferred Shares		0