Summary Of Significant Accounting Policies (Schedule Of Amounts Reclassified Out Of Accumulated Other Comprehensive Loss) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Mar. 31, 2015		Mar. 31, 2014		Mar. 31, 2015		Mar. 31, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss at beginning of period	$ (7,936)		$ (8,256)		$ (8,061)		$ (8,391)
Total other comprehensive income, before tax	99		108		297		322
Total tax expense	(37)		(40)		(110)		(119)
Other comprehensive income, net of tax	62		68		187		203
Accumulated other comprehensive loss at end of period	(7,874)		(8,188)		(7,874)		(8,188)
Pension Benefits [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of unrecognized net (gain) loss	107	[1]	115	[1]	321	[1]	345	[1]
Postretirement Benefits [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of unrecognized net (gain) loss	(7)	[1]	(6)	[1]	(21)	[1]	(20)	[1]
Amortization of prior service asset	$ (1)	[1]	$ (1)	[1]	$ (3)	[1]	$ (3)	[1]

[1] Included in the computation of net periodic benefit income/cost. See Notes 7 and 8 for additional information.