Summary Of Significant Accounting Policies (Schedule Of Amounts Reclassified Out Of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss at beginning of period		$ (8,631)	$ (7,936)	$ (10,057)	$ (8,061)
Total other comprehensive income, before tax		77	99	2,341	297
Total tax expense		(28)	(37)	(866)	(110)
Other comprehensive income, net of tax		49	62	1,475	187
Accumulated other comprehensive loss at end of period		(8,582)	(7,874)	(8,582)	(7,874)
Pension Benefits [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of unrecognized net (gain) loss	[1]	135	107	405	321
Postretirement Benefits [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of unrecognized net (gain) loss	[1]	(11)	(7)	(23)	(21)
Prior service credit arising during the period	[2]	0	0	2,038	0
Amortization of prior service credit	[1]	$ (47)	$ (1)	$ (79)	$ (3)

[1] Included in the computation of net periodic benefit income/cost. See Notes 9 and 10 for additional information.

[2] Due to a negative plan amendment and subsequent remeasurement. See Note 10 for additional information.