Income Taxes (Schedule of Income Tax Expense (Benefit)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Currently payable
Federal	$ 1,800	$ 62,200	$ 59,200
State	1,200	400	7,300
Foreign	200	0	0
Current Total	3,200	62,600	66,500
Deferred
Federal	(129,900)	33,000	8,300
State	3,200	5,800	1,500
Foreign	(100)	0	0
Deferred Total	(126,800)	38,800	9,800
Income taxes	$ (123,600)	$ 101,400	$ 76,300