Condensed Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net Income	$ 39,234	$ 35,277	$ 64,035	$ 61,939
Defined Benefit Pension and Postretirement Benefit Plans:
Amortization of loss, before tax	108	167	216	334
Amortization of prior service asset, before tax	(1)	(1)	(2)	(2)
Total Other Comprehensive Income, Before Tax	107	166	214	332
Tax Attributes of Items in Other Comprehensive Income:
Amortization of loss, tax	(39)	(62)	(79)	(124)
Amortization of prior service asset, tax	0	0	0	0
Total Tax Expense	(39)	(62)	(79)	(124)
Other comprehensive income, net of tax	68	104	135	208
Comprehensive Income	$ 39,302	$ 35,381	$ 64,170	$ 62,147