Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net Income	$ 47,907	$ 45,920	$ 86,935	$ 75,306
Defined Benefit Pension and Postretirement Benefit Plans:
Amortization of loss, before tax	102	134	205	268
Amortization of prior service credit, before tax	(45)	(46)	(91)	(91)
Total Other Comprehensive Income, Before Tax	57	88	114	177
Tax Attributes of Items in Other Comprehensive Income:
Amortization of loss, tax	(24)	(50)	(48)	(99)
Amortization of prior service credit, tax	10	17	21	33
Total Tax Expense	(14)	(33)	(27)	(66)
Other Comprehensive Income, Net of Tax	43	55	87	111
Comprehensive Income	$ 47,950	$ 45,975	$ 87,022	$ 75,417