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Summary Of Significant Accounting Policies (Schedule Of Amounts Reclassified Out Of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands | 12 Months Ended
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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.

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- Definition The total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (j-k) -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e637-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e681-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580 + Details
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- Definition Amount before tax, after reclassification adjustments, of (increase) decrease in accumulated other comprehensive (income) loss related to pension and other postretirement defined benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (i-k) -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669646-108580 + Details
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