Nature of Operations and Summary of Significant Accounting Policies Treasury Stock (Details) - USD ($) shares in Thousands, $ in Thousands	6 Months Ended
	Dec. 31, 2020	Jun. 30, 2020
Class of Stock Disclosures [Abstract]
Treasury Stock, Common, Shares	27,668	26,993
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased	2,323	2,998
Treasury Stock, Value	$ 1,291,572	$ 1,181,673
Treasury Stock, Shares, Acquired	675