Summary Of Significant Accounting Policies (Schedule Of Amounts Reclassified Out Of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands		12 Months Ended
		Jun. 30, 2016		Jun. 30, 2015		Jun. 30, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss at beginning of year		$ (10,057)		$ (8,061)
Net gain (loss) arising during the period		(4,200)		(3,563)		$ 96
Total other comprehensive loss, before tax		(2,051)		(3,167)		524
Total tax benefit		758		1,171		(194)
Other comprehensive loss, net of tax		(1,293)		(1,996)		330
Accumulated other comprehensive loss at end of year		(11,350)		(10,057)		(8,061)
Pension Benefits [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss at beginning of year		(10,444)
Net gain (loss) arising during the period		(4,409)		(3,408)
Amortization of unrecognized net loss (gain)		539	[1]	429	[1]	$ 460
Accumulated other comprehensive loss at end of year		(12,884)		(10,444)
Postretirement Benefits [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net gain (loss) arising during the period	[2]	209		(155)
Prior service credit arising during the period	[2]	1,770		0
Amortization of unrecognized net loss (gain)	[1]	(34)		(28)
Amortization of prior service credit	[1]	$ (126)		$ (5)

[1] Included in the computation of net periodic benefit income/cost. See Notes 12 and 13 for additional information.

[2] Includes a negative plan amendment and subsequent remeasurement. See Note 13 for additional information.