Summary Of Significant Accounting Policies (Schedule Of Amounts Reclassified Out Of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017		Jun. 30, 2016		Jun. 30, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss at beginning of year	$ (11,350)		$ (10,057)
Net gain (loss) arising during the period	3,334		(4,200)		$ (3,563)
Total other comprehensive income (loss), before tax	3,829		(2,051)		(3,167)
Total tax (expense) benefit	(1,415)		758		1,171
Other comprehensive income (loss), net of tax	2,414		(1,293)		(1,996)
Accumulated other comprehensive loss at end of year	(8,936)		(11,350)		(10,057)
Pension Benefits [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Accumulated other comprehensive loss at beginning of year	(12,884)
Net gain (loss) arising during the period	3,339		(4,409)
Amortization of unrecognized net loss (gain)	715	[1]	539	[1]	$ 429
Accumulated other comprehensive loss at end of year	(10,328)		(12,884)
Postretirement Benefits [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net gain (loss) arising during the period	(5)		209	[2]
Prior service credit arising during the period	0		1,770	[2]
Amortization of unrecognized net loss (gain)	(38)		(34)
Amortization of prior service credit	$ (182)		$ (126)

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

[2] Amounts for 2016 include a negative plan amendment and subsequent remeasurement. Additional disclosures for postretirement benefits are not included as they are not considered material.