Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Consolidated Statements Of Comprehensive Income [Abstract]
Net Income	$ 109,249	$ 95,808	$ 106,364
Defined Benefit Pension and Postretirement Benefit Plans:
Net gain (loss) arising during the period, before tax	5,322	(8,437)	4,036
Amortization of loss, before tax	665	324	500
Amortization of transition asset, before tax	(1)	(1)	(1)
Amortization of prior service asset, before tax	(5)	(5)	(5)
Total Other Comprehensive Income (Loss), Before Tax	5,981	(8,119)	4,530
Tax Attributes of Items in Other Comprehensive Income (Loss):
Net gain (loss) arising during the period, tax	(1,965)	3,118	(1,590)
Amortization of loss, tax	(247)	(120)	(188)
Amortization of transition asset, tax	0	0	0
Amortization of prior service asset, tax	2	2	2
Total Tax (Expense) Benefit	(2,210)	3,000	(1,776)
Other Comprehensive Income (Loss), Net of Tax	3,771	(5,119)	2,754
Comprehensive Income	$ 113,020	$ 90,689	$ 109,118