CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Preferred stock	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock
Shares, beginning of year at Jun. 30, 2013			101,993,808
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued for equity-based payment arrangements (shares)			344,372
Shares issued for Employee Stock Purchase Plan (shares)			91,746
Shares, end of year at Jun. 30, 2014			102,429,926
Balance, start of year (value) at Jun. 30, 2013			$ 1,020	$ 400,710	$ 1,016,168
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued for equity-based payment arrangements (value)			3
Shares issued for Employee Stock Purchase Plan (value)			1	4,283
Shares issued upon exercise of stock options (value)				606
Tax withholding related to share based compensation				(6,598)
Tax benefits from share-based compensation (value)				3,420
Stock-based compensation expense (value)				10,091
Net Income	$ 186,715				186,715
Dividends (value)					(71,251)
Balance, end of year (value) at Jun. 30, 2014	$ 967,387		$ 1,024	412,512	1,131,632
Balance, start of year (value) at Jun. 30, 2013						$ (402,082)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Purchase of treasury shares						(175,699)
Balance, end of year (value) at Jun. 30, 2014						(577,781)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share	$ 0.84
Preferred Stock, Shares Outstanding		0
Shares issued for equity-based payment arrangements (shares)			172,661
Shares issued for Employee Stock Purchase Plan (shares)			92,627
Shares, end of year at Jun. 30, 2015			102,695,214
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued for equity-based payment arrangements (value)			$ 2
Shares issued for Employee Stock Purchase Plan (value)			1	4,880
Shares issued upon exercise of stock options (value)				640
Tax withholding related to share based compensation				(7,951)
Tax benefits from share-based compensation (value)				4,343
Stock-based compensation expense (value)				10,112
Net Income	$ 211,221				211,221
Dividends (value)					(76,410)
Balance, end of year (value) at Jun. 30, 2015	991,534		$ 1,027	424,536	1,266,443
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Purchase of treasury shares						(122,691)
Balance, end of year (value) at Jun. 30, 2015	$ (700,472)					(700,472)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share	$ 0.94
Preferred Stock, Shares Outstanding		0
Shares issued for equity-based payment arrangements (shares)			121,348
Shares issued for Employee Stock Purchase Plan (shares)			87,409
Shares, end 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
Shares issued for Employee Stock Purchase Plan (value)			1	5,710
Shares issued upon exercise of stock options (value)				696
Tax withholding related to share based compensation				(2,590)
Tax benefits from share-based compensation (value)				1,051
Stock-based compensation expense (value)				10,720
Net Income	$ 248,867				248,867
Dividends (value)					(84,118)
Balance, end of year (value) at Jun. 30, 2016	996,210		$ 1,029	$ 440,123	$ 1,431,192
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Purchase of treasury shares						(175,662)
Balance, end of year (value) at Jun. 30, 2016	$ (876,134)					$ (876,134)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividends declared per share	$ 1.06
Preferred Stock, Shares Outstanding		0