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, 2019			$ 1,035	$ 472,030	$ 2,066,073	$ (1,110,124)
Balance, beginning of period (value) (Accounting Standards Update 2016-13) at Jun. 30, 2019					0
Shares, beginning of period at Jun. 30, 2019			103,496,026
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued for equity-based payment arrangements (shares)			19,888
Shares issued for Employee Stock Purchase Plan (shares)			19,914
Shares issued for equity-based payment arrangements (value)			$ 0	(1)
Tax withholding related to share-based compensation				(2,072)
Shares issued for Employee Stock Purchase Plan (value)				2,412
Stock-based compensation expense				2,853
Net Income	$ 89,370				89,370
Dividends					(30,771)
Purchase of treasury shares						(14,145)
Balance, end of period (value) at Sep. 30, 2019	$ 1,476,660		$ 1,035	475,222	2,124,672	(1,124,269)
Shares, end of period at Sep. 30, 2019			103,535,828
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share	$ 0.40
Preferred Shares		0
Balance, beginning of period (value) at Jun. 30, 2020	$ 1,549,688		$ 1,036	495,005	2,235,320	(1,181,673)
Balance, beginning of period (value) (Accounting Standards Update 2016-13) at Jun. 30, 2020					(493)
Shares, beginning of period at Jun. 30, 2020			103,622,563
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued for equity-based payment arrangements (shares)			55,002
Shares issued for Employee Stock Purchase Plan (shares)			19,397
Shares issued for equity-based payment arrangements (value)			$ (1)	(1)
Tax withholding related to share-based compensation				(5,505)
Shares issued for Employee Stock Purchase Plan (value)				2,907
Stock-based compensation expense				4,625
Net Income	91,216				91,216
Dividends					(32,815)
Purchase of treasury shares						(65,873)
Balance, end of period (value) at Sep. 30, 2020	$ 1,543,750		$ 1,037	$ 497,031	$ 2,293,228	$ (1,247,546)
Shares, end of period at Sep. 30, 2020			103,696,962
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share	$ 0.43
Preferred Shares		0