Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Statement of Comprehensive Income [Abstract]
Net Income	$ 74,986	$ 109,249	$ 95,808
Defined Benefit Pension and Postretirement Benefit Plans:
Net gain (loss) arising during the period, before tax	96	5,322	(8,437)
Amortization of loss, before tax	433	665	324
Amortization of transition asset, before tax	0	(1)	(1)
Amortization of prior service asset, before tax	(5)	(5)	(5)
Total Other Comprehensive Income (Loss), Before Tax	524	5,981	(8,119)
Tax Attributes of Items in Other Comprehensive Income (Loss):
Net gain (loss) arising during the period, tax	(36)	(1,965)	3,118
Amortization of loss, tax	(160)	(247)	(120)
Amortization of transition asset, tax	0	0	0
Amortization of prior service asset, tax	2	2	2
Total Tax (Expense) Benefit	(194)	(2,210)	3,000
Other Comprehensive Income (Loss), Net of Tax	330	3,771	(5,119)
Comprehensive Income	$ 75,316	$ 113,020	$ 90,689