Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
Net Income	$ 34,511	$ 32,954	$ 62,139	$ 55,715
Defined Benefit Pension and Postretirement Benefit Plans:
Prior service credit arising during the period, before tax	2,038	0	2,038	0
Amortization of loss, before tax	127	100	258	200
Amortization of prior service credit, before tax	(31)	(1)	(32)	(2)
Total Other Comprehensive Income, Before Tax	2,134	99	2,264	198
Tax Attributes of Items in Other Comprehensive Income:
Prior service credit arising during the period, tax	(753)	0	(753)	0
Amortization of loss, tax	(48)	(37)	(97)	(73)
Amortization of prior service credit, tax	12	0	12	0
Total Tax Expense	(789)	(37)	(838)	(73)
Other Comprehensive Income, Net of Tax	1,345	62	1,426	125
Comprehensive Income	$ 35,856	$ 33,016	$ 63,565	$ 55,840