Treasury Stock (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Equity [Abstract]
Treasury Stock, Shares	26,107,903	25,660,212
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased	3,883,000	4,330,000
Treasury Stock, Value	$ 1,055,260	$ 1,006,274
Treasury Stock, Shares, Acquired	448,000
Payments for Repurchase of Common Stock	$ 48,986	$ 130,140	$ 175,662